Integrate perlio:

[perl5.git] / Configure

#! /bin/sh
#
# If these # comments don't work, trim them. Don't worry about any other
# shell scripts, Configure will trim # comments from them for you.
#
# (If you are trying to port this package to a machine without sh,
# I would suggest you have a look at the prototypical config_h.SH file
# and edit it to reflect your system. Some packages may include samples
# of config.h for certain machines, so you might look for one of those.)
#
# Yes, you may rip this off to use in other distribution packages. This
# script belongs to the public domain and cannot be copyrighted.
#
# (Note: this Configure script was generated automatically. Rather than
# working with this copy of Configure, you may wish to get metaconfig.
# The dist-3.0 package (which contains metaconfig) was posted in
# comp.sources.misc and is available on CPAN under authors/id/RAM so
# you may fetch it yourself from your nearest archive site.)
#

# $Id: Head.U,v 3.0.1.9 1997/02/28 15:02:09 ram Exp $
#
# Generated on Sun Nov 12 20:50:13 EET 2000 [metaconfig 3.0 PL70]
# (with additional metaconfig patches by perlbug@perl.org)

cat >/tmp/c1$$ <<EOF
ARGGGHHHH!!!!!

SCO csh still thinks true is false.  Write to SCO today and tell them that next
year Configure ought to "rm /bin/csh" unless they fix their blasted shell. :-)

(Actually, Configure ought to just patch csh in place.  Hmm.  Hmmmmm.  All
we'd have to do is go in and swap the && and || tokens, wherever they are.)

[End of diatribe. We now return you to your regularly scheduled programming...]
EOF
cat >/tmp/c2$$ <<EOF

OOPS!  You naughty creature!  You didn't run Configure with sh!
I will attempt to remedy the situation by running sh for you...
EOF

true || cat /tmp/c1$$ /tmp/c2$$
true || exec sh $0 $argv:q

(exit $?0) || cat /tmp/c2$$
(exit $?0) || exec sh $0 $argv:q
rm -f /tmp/c1$$ /tmp/c2$$

: compute my invocation name
me=$0
case "$0" in
*/*)
	me=`echo $0 | sed -e 's!.*/\(.*\)!\1!' 2>/dev/null`
	test "$me" || me=$0
	;;
esac

: Proper separator for the PATH environment variable
p_=:
: On OS/2 this directory should exist if this is not floppy only system :-]
if test -d c:/. ; then
    if test -n "$OS2_SHELL"; then
		p_=\;
		PATH=`cmd /c "echo %PATH%" | tr '\\\\' / `
		OS2_SHELL=`cmd /c "echo %OS2_SHELL%" | tr '\\\\' / | tr '[A-Z]' '[a-z]'`
	elif test -n "$DJGPP"; then
		p_=\;
	fi
fi

: Proper PATH setting
paths='/bin /usr/bin /usr/local/bin /usr/ucb /usr/local /usr/lbin'
paths="$paths /opt/bin /opt/local/bin /opt/local /opt/lbin"
paths="$paths /usr/5bin /etc /usr/gnu/bin /usr/new /usr/new/bin /usr/nbin"
paths="$paths /opt/gnu/bin /opt/new /opt/new/bin /opt/nbin"
paths="$paths /sys5.3/bin /sys5.3/usr/bin /bsd4.3/bin /bsd4.3/usr/ucb"
paths="$paths /bsd4.3/usr/bin /usr/bsd /bsd43/bin /usr/ccs/bin"
paths="$paths /etc /usr/lib /usr/ucblib /lib /usr/ccs/lib"
paths="$paths /sbin /usr/sbin /usr/libexec"

for p in $paths
do
	case "$p_$PATH$p_" in
	*$p_$p$p_*) ;;
	*) test -d $p && PATH=$PATH$p_$p ;;
	esac
done

PATH=.$p_$PATH
export PATH

: shall we be using ksh?
inksh=''
needksh=''
avoidksh=''
newsh=/bin/ksh
changesh=''
if (PATH=.; alias -x) >/dev/null 2>&1; then
		inksh=true
fi
if test -f /hp-ux -a -f /bin/ksh; then
	needksh='to avoid sh bug in "here document" expansion'
fi
if test -d /usr/lpp -a -f /usr/bin/bsh -a -f /usr/bin/uname; then
	if test X`/usr/bin/uname -v` = X4; then
		avoidksh="to avoid AIX 4's /bin/sh"
		newsh=/usr/bin/bsh
	fi
fi
if test -f /osf_boot -a -f /usr/sbin/setld; then
	if test X`/usr/bin/uname -s` = XOSF1; then
	        avoidksh="to avoid Digital UNIX' ksh"
	        newsh=/bin/sh
	        unset BIN_SH # if this is 'xpg4' sh will start up ksh
	fi
fi
case "$inksh/$needksh" in
/[a-z]*)
		ENV=''
		changesh=true
		reason="$needksh"
	;;
esac
case "$inksh/$avoidksh" in
true/[a-z]*)
	changesh=true
	reason="$avoidksh"
	;;
esac
case "$inksh/$needksh-$avoidksh-" in
true/--)
		cat <<EOM
(I see you are using the Korn shell.  Some ksh's blow up on $me,
mainly on older exotic systems.  If yours does, try the Bourne shell instead.)
EOM
	;;
esac
case "$changesh" in
true)
	echo "(Feeding myself to $newsh $reason.)"
	case "$0" in
	Configure|*/Configure) exec $newsh $0 "$@";;
	*) exec $newsh Configure "$@";;
	esac
	;;
esac

: if needed set CDPATH to a harmless value that is not chatty
: avoid bash 2.02 problems with empty CDPATH.
case "$CDPATH" in
'')	;;
*)	case "$SHELL" in
	*bash*)	CDPATH='.' ;;
	*)		CDPATH='' ;;
	esac
	;;
esac
: Configure runs within the UU subdirectory
test -d UU || mkdir UU
cd UU && rm -f ./*

ccname=''
ccversion=''
ccsymbols=''
cppccsymbols=''
cppsymbols=''
perllibs=''
dynamic_ext=''
extensions=''
known_extensions=''
nonxs_ext=''
static_ext=''
useopcode=''
useposix=''
d_bsd=''
d_eunice=''
d_xenix=''
eunicefix=''
Mcc=''
ar=''
awk=''
bash=''
bison=''
byacc=''
cat=''
chgrp=''
chmod=''
chown=''
comm=''
compress=''
cp=''
cpio=''
cpp=''
csh=''
date=''
echo=''
egrep=''
emacs=''
expr=''
find=''
flex=''
grep=''
gzip=''
inews=''
ksh=''
less=''
line=''
lint=''
ln=''
lp=''
lpr=''
ls=''
mail=''
mailx=''
make=''
mkdir=''
more=''
mv=''
nm=''
nroff=''
perl=''
pg=''
pmake=''
pr=''
rm=''
rmail=''
sed=''
sendmail=''
shar=''
sleep=''
smail=''
sort=''
submit=''
tail=''
tar=''
tbl=''
tee=''
test=''
touch=''
tr=''
troff=''
uname=''
uniq=''
uuname=''
vi=''
zcat=''
zip=''
full_ar=''
full_sed=''
libswanted=''
hint=''
myuname=''
osname=''
osvers=''
Author=''
Date=''
Header=''
Id=''
Locker=''
Log=''
RCSfile=''
Revision=''
Source=''
State=''
_a=''
_exe=''
_o=''
archobjs=''
exe_ext=''
firstmakefile=''
lib_ext=''
obj_ext=''
path_sep=''
afs=''
alignbytes=''
ansi2knr=''
archlib=''
archlibexp=''
d_archlib=''
installarchlib=''
archname=''
myarchname=''
d_atolf=''
d_atoll=''
baserev=''
bin=''
binexp=''
installbin=''
bincompat5005=''
d_bincompat5005=''
byteorder=''
cc=''
ccflags=''
cppflags=''
ldflags=''
lkflags=''
locincpth=''
optimize=''
cf_email=''
cf_by=''
cf_time=''
charsize=''
contains=''
cpp_stuff=''
cpplast=''
cppminus=''
cpprun=''
cppstdin=''
crosscompile=''
d_access=''
d_accessx=''
d_alarm=''
d_attribut=''
d_bcmp=''
d_bcopy=''
d_bzero=''
d_casti32=''
castflags=''
d_castneg=''
d_chown=''
d_chroot=''
d_chsize=''
d_closedir=''
d_void_closedir=''
d_const=''
cryptlib=''
d_crypt=''
d_csh=''
full_csh=''
d_cuserid=''
d_dbl_dig=''
d_difftime=''
d_dlerror=''
d_dlopen=''
d_dlsymun=''
d_dosuid=''
d_suidsafe=''
d_drand48proto=''
d_dup2=''
d_eaccess=''
d_endgrent=''
d_endhent=''
d_endnent=''
d_endpent=''
d_endpwent=''
d_endsent=''
d_fchmod=''
d_fchown=''
d_fcntl=''
d_fcntl_can_lock=''
d_fd_macros=''
d_fd_set=''
d_fds_bits=''
d_fgetpos=''
d_flexfnam=''
d_flock=''
d_fork=''
d_fpos64_t=''
d_frexpl=''
d_fs_data_s=''
d_fseeko=''
d_fsetpos=''
d_fstatfs=''
d_fsync=''
d_ftello=''
d_ftime=''
d_gettimeod=''
d_Gconvert=''
d_getcwd=''
d_getespwnam=''
d_getfsstat=''
d_getgrent=''
d_getgrps=''
d_gethbyaddr=''
d_gethbyname=''
d_gethent=''
aphostname=''
d_gethname=''
d_phostname=''
d_uname=''
d_gethostprotos=''
d_getlogin=''
d_getmnt=''
d_getmntent=''
d_getnbyaddr=''
d_getnbyname=''
d_getnent=''
d_getnetprotos=''
d_getpagsz=''
d_getpent=''
d_getpgid=''
d_getpgrp2=''
d_bsdgetpgrp=''
d_getpgrp=''
d_getppid=''
d_getprior=''
d_getpbyname=''
d_getpbynumber=''
d_getprotoprotos=''
d_getprpwnam=''
d_getpwent=''
d_getsent=''
d_getservprotos=''
d_getspnam=''
d_getsbyname=''
d_getsbyport=''
d_gnulibc=''
d_hasmntopt=''
d_htonl=''
d_iconv=''
d_inetaton=''
d_int64_t=''
d_isascii=''
d_isnan=''
d_isnanl=''
d_killpg=''
d_lchown=''
d_ldbl_dig=''
d_link=''
d_locconv=''
d_lockf=''
d_longdbl=''
longdblsize=''
d_longlong=''
longlongsize=''
d_lseekproto=''
d_lstat=''
d_madvise=''
d_mblen=''
d_mbstowcs=''
d_mbtowc=''
d_memchr=''
d_memcmp=''
d_memcpy=''
d_memmove=''
d_memset=''
d_mkdir=''
d_mkdtemp=''
d_mkfifo=''
d_mkstemp=''
d_mkstemps=''
d_mktime=''
d_mmap=''
mmaptype=''
d_modfl=''
d_mprotect=''
d_msg=''
d_msgctl=''
d_msgget=''
d_msgrcv=''
d_msgsnd=''
d_msync=''
d_munmap=''
d_nice=''
d_off64_t=''
d_open3=''
d_fpathconf=''
d_pathconf=''
d_pause=''
d_pipe=''
d_poll=''
d_portable=''
d_old_pthread_create_joinable=''
old_pthread_create_joinable=''
d_pthread_yield=''
d_sched_yield=''
sched_yield=''
d_qgcvt=''
d_readdir=''
d_rewinddir=''
d_seekdir=''
d_telldir=''
d_readlink=''
d_rename=''
d_rmdir=''
d_safebcpy=''
d_safemcpy=''
d_sanemcmp=''
d_select=''
d_sem=''
d_semctl=''
d_semget=''
d_semop=''
d_setegid=''
d_seteuid=''
d_setgrent=''
d_setgrps=''
d_sethent=''
d_setlinebuf=''
d_setlocale=''
d_setnent=''
d_setpent=''
d_setpgid=''
d_setpgrp2=''
d_bsdsetpgrp=''
d_setpgrp=''
d_setprior=''
d_setproctitle=''
d_setpwent=''
d_setregid=''
d_setresgid=''
d_setresuid=''
d_setreuid=''
d_setrgid=''
d_setruid=''
d_setsent=''
d_setsid=''
d_setvbuf=''
d_sfio=''
usesfio=''
d_shm=''
d_shmat=''
d_shmatprototype=''
shmattype=''
d_shmctl=''
d_shmdt=''
d_shmget=''
d_sigaction=''
d_sigsetjmp=''
d_msg_ctrunc=''
d_msg_dontroute=''
d_msg_oob=''
d_msg_peek=''
d_msg_proxy=''
d_oldsock=''
d_scm_rights=''
d_socket=''
d_sockpair=''
sockethdr=''
socketlib=''
d_socklen_t=''
d_socks5_init=''
d_sqrtl=''
d_statblks=''
d_statfs_f_flags=''
d_statfs_s=''
d_fstatvfs=''
d_statvfs=''
d_stdio_cnt_lval=''
d_stdio_ptr_lval=''
d_stdio_ptr_lval_nochange_cnt=''
d_stdio_ptr_lval_sets_cnt=''
d_stdiobase=''
d_stdstdio=''
stdio_base=''
stdio_bufsiz=''
stdio_cnt=''
stdio_filbuf=''
stdio_ptr=''
d_index=''
d_strchr=''
d_strcoll=''
d_strctcpy=''
d_strerrm=''
d_strerror=''
d_sysernlst=''
d_syserrlst=''
d_strtod=''
d_strtol=''
d_strtold=''
d_strtoll=''
d_strtoul=''
d_strtoull=''
d_strtouq=''
d_strxfrm=''
d_symlink=''
d_syscall=''
d_sysconf=''
d_system=''
d_tcgetpgrp=''
d_tcsetpgrp=''
d_telldirproto=''
d_time=''
timetype=''
clocktype=''
d_times=''
d_truncate=''
d_tzname=''
d_umask=''
d_semctl_semid_ds=''
d_semctl_semun=''
d_union_semun=''
d_ustat=''
d_vfork=''
usevfork=''
d_voidsig=''
signal_t=''
d_volatile=''
d_charvspr=''
d_vprintf=''
d_wait4=''
d_waitpid=''
d_wcstombs=''
d_wctomb=''
dlext=''
cccdlflags=''
ccdlflags=''
dlsrc=''
ld=''
lddlflags=''
usedl=''
doublesize=''
ebcdic=''
fflushNULL=''
fflushall=''
fpossize=''
fpostype=''
gccosandvers=''
gccversion=''
gidformat=''
gidsign=''
gidsize=''
gidtype=''
groupstype=''
h_fcntl=''
h_sysfile=''
i_arpainet=''
db_hashtype=''
db_prefixtype=''
i_db=''
i_dbm=''
i_rpcsvcdbm=''
d_dirnamlen=''
direntrytype=''
i_dirent=''
i_dld=''
i_dlfcn=''
i_fcntl=''
i_float=''
i_gdbm=''
d_grpasswd=''
i_grp=''
i_iconv=''
i_ieeefp=''
i_inttypes=''
i_libutil=''
i_limits=''
i_locale=''
i_machcthr=''
i_malloc=''
i_math=''
i_memory=''
i_mntent=''
i_ndbm=''
i_netdb=''
i_neterrno=''
i_netinettcp=''
i_niin=''
i_sysin=''
i_poll=''
i_prot=''
i_pthread=''
d_pwage=''
d_pwchange=''
d_pwclass=''
d_pwcomment=''
d_pwexpire=''
d_pwgecos=''
d_pwpasswd=''
d_pwquota=''
i_pwd=''
i_sfio=''
i_shadow=''
i_socks=''
i_stddef=''
i_stdlib=''
i_string=''
strings=''
i_sunmath=''
i_sysaccess=''
i_sysdir=''
i_sysfile=''
d_voidtty=''
i_bsdioctl=''
i_sysfilio=''
i_sysioctl=''
i_syssockio=''
i_syslog=''
i_sysmman=''
i_sysmode=''
i_sysmount=''
i_sysndir=''
i_sysparam=''
i_sysresrc=''
i_syssecrt=''
i_sysselct=''
i_sysstat=''
i_sysstatfs=''
i_sysstatvfs=''
i_systimes=''
i_systypes=''
i_sysuio=''
i_sysun=''
i_sysutsname=''
i_sysvfs=''
i_syswait=''
i_sgtty=''
i_termio=''
i_termios=''
i_systime=''
i_systimek=''
i_time=''
timeincl=''
i_unistd=''
i_ustat=''
i_utime=''
i_values=''
i_stdarg=''
i_varargs=''
i_varhdr=''
i_vfork=''
inc_version_list=''
inc_version_list_init=''
installprefix=''
installprefixexp=''
installstyle=''
installusrbinperl=''
intsize=''
longsize=''
shortsize=''
libc=''
ldlibpthname=''
libperl=''
shrpenv=''
useshrplib=''
glibpth=''
libpth=''
loclibpth=''
plibpth=''
xlibpth=''
ignore_versioned_solibs=''
libs=''
libsdirs=''
libsfiles=''
libsfound=''
libspath=''
lns=''
d_PRIEUldbl=''
d_PRIFUldbl=''
d_PRIGUldbl=''
d_PRIeldbl=''
d_PRIfldbl=''
d_PRIgldbl=''
d_SCNfldbl=''
sPRIEUldbl=''
sPRIFUldbl=''
sPRIGUldbl=''
sPRIeldbl=''
sPRIfldbl=''
sPRIgldbl=''
sSCNfldbl=''
lseeksize=''
lseektype=''
make_set_make=''
d_mymalloc=''
freetype=''
mallocobj=''
mallocsrc=''
malloctype=''
usemymalloc=''
installman1dir=''
man1dir=''
man1direxp=''
man1ext=''
installman3dir=''
man3dir=''
man3direxp=''
man3ext=''
modetype=''
multiarch=''
mydomain=''
myhostname=''
phostname=''
c=''
n=''
d_eofnblk=''
eagain=''
o_nonblock=''
rd_nodata=''
netdb_hlen_type=''
netdb_host_type=''
netdb_name_type=''
netdb_net_type=''
groupcat=''
hostcat=''
passcat=''
orderlib=''
ranlib=''
d_perl_otherlibdirs=''
otherlibdirs=''
package=''
spackage=''
pager=''
api_revision=''
api_subversion=''
api_version=''
api_versionstring=''
patchlevel=''
revision=''
subversion=''
version=''
perl5=''
perladmin=''
perlpath=''
d_nv_preserves_uv=''
d_nv_preserves_uv_bits=''
i16size=''
i16type=''
i32size=''
i32type=''
i64size=''
i64type=''
i8size=''
i8type=''
ivsize=''
ivtype=''
nvsize=''
nvtype=''
u16size=''
u16type=''
u32size=''
u32type=''
u64size=''
u64type=''
u8size=''
u8type=''
uvsize=''
uvtype=''
ivdformat=''
nvEUformat=''
nvFUformat=''
nvGUformat=''
nveformat=''
nvfformat=''
nvgformat=''
uvXUformat=''
uvoformat=''
uvuformat=''
uvxformat=''
pidtype=''
prefix=''
prefixexp=''
installprivlib=''
privlib=''
privlibexp=''
prototype=''
ptrsize=''
d_PRIXU64=''
d_PRId64=''
d_PRIi64=''
d_PRIo64=''
d_PRIu64=''
d_PRIx64=''
sPRIXU64=''
sPRId64=''
sPRIi64=''
sPRIo64=''
sPRIu64=''
sPRIx64=''
d_quad=''
quadkind=''
quadtype=''
uquadtype=''
drand01=''
randbits=''
randfunc=''
randseedtype=''
seedfunc=''
installscript=''
scriptdir=''
scriptdirexp=''
selectminbits=''
selecttype=''
sh=''
sig_count=''
sig_name=''
sig_name_init=''
sig_num=''
sig_num_init=''
installsitearch=''
sitearch=''
sitearchexp=''
installsitebin=''
sitebin=''
sitebinexp=''
installsitelib=''
sitelib=''
sitelib_stem=''
sitelibexp=''
siteprefix=''
siteprefixexp=''
sizesize=''
sizetype=''
so=''
socksizetype=''
sharpbang=''
shsharp=''
spitshell=''
src=''
ssizetype=''
startperl=''
startsh=''
stdchar=''
d_stdio_stream_array=''
stdio_stream_array=''
sysman=''
trnl=''
uidformat=''
uidsign=''
uidsize=''
uidtype=''
archname64=''
use64bitall=''
use64bitint=''
ccflags_uselargefiles=''
ldflags_uselargefiles=''
libswanted_uselargefiles=''
uselargefiles=''
uselongdouble=''
usemorebits=''
usemultiplicity=''
nm_opt=''
nm_so_opt=''
runnm=''
usenm=''
useperlio=''
usesocks=''
d_oldpthreads=''
use5005threads=''
useithreads=''
usethreads=''
incpath=''
mips_type=''
usrinc=''
d_vendorarch=''
installvendorarch=''
vendorarch=''
vendorarchexp=''
d_vendorbin=''
installvendorbin=''
vendorbin=''
vendorbinexp=''
d_vendorlib=''
installvendorlib=''
vendorlib=''
vendorlib_stem=''
vendorlibexp=''
usevendorprefix=''
vendorprefix=''
vendorprefixexp=''
versiononly=''
defvoidused=''
voidflags=''
pm_apiversion=''
xs_apiversion=''
CONFIG=''

define='define'
undef='undef'
smallmach='pdp11 i8086 z8000 i80286 iAPX286'
rmlist=''

: We must find out about Eunice early
eunicefix=':'
if test -f /etc/unixtovms; then
	eunicefix=/etc/unixtovms
fi
if test -f /etc/unixtovms.exe; then
	eunicefix=/etc/unixtovms.exe
fi

i_whoami=''
ccname=''
ccversion=''
perllibs=''
: set useposix=false in your hint file to disable the POSIX extension.
useposix=true
: set useopcode=false in your hint file to disable the Opcode extension.
useopcode=true
: Trailing extension.  Override this in a hint file, if needed.
_exe=''
: Extra object files, if any, needed on this platform.
archobjs=''
archname=''
: Possible local include directories to search.
: Set locincpth to "" in a hint file to defeat local include searches.
locincpth="/usr/local/include /opt/local/include /usr/gnu/include"
locincpth="$locincpth /opt/gnu/include /usr/GNU/include /opt/GNU/include"
:
: no include file wanted by default
inclwanted=''

groupstype=''
: change the next line if compiling for Xenix/286 on Xenix/386
xlibpth='/usr/lib/386 /lib/386'
: Possible local library directories to search.
loclibpth="/usr/local/lib /opt/local/lib /usr/gnu/lib"
loclibpth="$loclibpth /opt/gnu/lib /usr/GNU/lib /opt/GNU/lib"

: general looking path for locating libraries
glibpth="/lib /usr/lib $xlibpth"
glibpth="$glibpth /usr/ccs/lib /usr/ucblib /usr/local/lib"
test -f /usr/shlib/libc.so && glibpth="/usr/shlib $glibpth"
test -f /shlib/libc.so     && glibpth="/shlib $glibpth"

: Private path used by Configure to find libraries.  Its value
: is prepended to libpth. This variable takes care of special
: machines, like the mips.  Usually, it should be empty.
plibpth=''

: default library list
libswanted=''
: some systems want to use only the non-versioned libso:s
ignore_versioned_solibs=''
archname64=''
ccflags_uselargefiles=''
ldflags_uselargefiles=''
libswanted_uselargefiles=''
: set usemultiplicity on the Configure command line to enable multiplicity.
: set usesocks on the Configure command line to enable socks.
: set usethreads on the Configure command line to enable threads.
: full support for void wanted by default
defvoidused=15

: List of libraries we want.
: If anyone needs -lnet, put it in a hint file.
libswanted='sfio socket bind inet nsl nm ndbm gdbm dbm db malloc dl'
libswanted="$libswanted dld ld sun m c cposix posix"
libswanted="$libswanted ndir dir crypt sec"
libswanted="$libswanted ucb bsd BSD PW x iconv util"
: We probably want to search /usr/shlib before most other libraries.
: This is only used by the lib/ExtUtils/MakeMaker.pm routine extliblist.
glibpth=`echo " $glibpth " | sed -e 's! /usr/shlib ! !'`
glibpth="/usr/shlib $glibpth"
: Do not use vfork unless overridden by a hint file.
usevfork=false

: Find the basic shell for Bourne shell scripts
case "$sh" in
'')
	case "$SYSTYPE" in
	*bsd*|sys5*) xxx="/$SYSTYPE/bin/sh";;
	*) xxx='/bin/sh';;
	esac
	if test -f "$xxx"; then
		sh="$xxx"
	else
		: Build up a list and do a single loop so we can 'break' out.
		pth=`echo $PATH | sed -e "s/$p_/ /g"`
		for xxx in sh bash ksh pdksh ash; do
			for p in $pth; do
				try="$try ${p}/${xxx}"
			done
		done
		for xxx in $try; do
			if test -f "$xxx"; then
				sh="$xxx";
				break
			elif test -f "$xxx.exe"; then
				sh="$xxx";
				break
			fi
		done
	fi
	;;
esac

case "$sh" in
'')	cat <<EOM >&2
$me:  Fatal Error:  I can't find a Bourne Shell anywhere.  

Usually it's in /bin/sh.  How did you even get this far?
Please contact me (Perl Maintainers) at perlbug@perl.org and 
we'll try to straighten this all out.
EOM
	exit 1
	;;
esac

: see if sh knows # comments
if `$sh -c '#' >/dev/null 2>&1`; then
	shsharp=true
	spitshell=cat
	xcat=/bin/cat
	test -f $xcat || xcat=/usr/bin/cat
	echo "#!$xcat" >try
	$eunicefix try
	chmod +x try
	./try > today
	if test -s today; then
		sharpbang='#!'
	else
		echo "#! $xcat" > try
		$eunicefix try
		chmod +x try
		./try > today
		if test -s today; then
			sharpbang='#! '
		else
			sharpbang=': use '
		fi
	fi
else
	echo " "
	echo "Your $sh doesn't grok # comments--I will strip them later on."
	shsharp=false
	cd ..
	echo "exec grep -v '^[ 	]*#'" >spitshell
	chmod +x spitshell
	$eunicefix spitshell
	spitshell=`pwd`/spitshell
	cd UU
	echo "I presume that if # doesn't work, #! won't work either!"
	sharpbang=': use '
fi
rm -f try today

: figure out how to guarantee sh startup
case "$startsh" in
'') startsh=${sharpbang}${sh} ;;
*)
esac
cat >try <<EOSS
$startsh
set abc
test "$?abc" != 1
EOSS

chmod +x try
$eunicefix try
if ./try; then
	: echo "Yup, it does."
else
	echo "Hmm... '$startsh' does not guarantee sh startup..."
	echo "You may have to fix up the shell scripts to make sure $sh runs them."
fi
rm -f try


: Save command line options in file UU/cmdline.opt for later use in
: generating config.sh.
cat > cmdline.opt <<EOSH
# Configure command line arguments.
config_arg0='$0'
config_args='$*'
config_argc=$#
EOSH
argn=1
for arg in "$@"; do
	cat >>cmdline.opt <<EOSH
config_arg$argn='$arg'
EOSH
	argn=`expr $argn + 1`
done

: produce awk script to parse command line options
cat >options.awk <<'EOF'
BEGIN {
	optstr = "A:dD:eEf:hKOrsSU:V";	# getopt-style specification

	len = length(optstr);
	for (i = 1; i <= len; i++) {
		c = substr(optstr, i, 1);
		if (i < len) a = substr(optstr, i + 1, 1); else a = "";
		if (a == ":") {
			arg[c] = 1;
			i++;
		}
		opt[c] = 1;
	}
}
{
	expect = 0;
	str = $0;
	if (substr(str, 1, 1) != "-") {
		printf("'%s'\n", str);
		next;
	}
	len = length($0);
	for (i = 2; i <= len; i++) {
		c = substr(str, i, 1);
		if (!opt[c]) {
			printf("-%s\n", substr(str, i));
			next;
		}
		printf("-%s\n", c);
		if (arg[c]) {
			if (i < len)
				printf("'%s'\n", substr(str, i + 1));
			else
				expect = 1;
			next;
		}
	}
}
END {
	if (expect)
		print "?";
}
EOF

: process the command line options
set X `for arg in "$@"; do echo "X$arg"; done |
	sed -e s/X// | awk -f options.awk`
eval "set $*"
shift
rm -f options.awk

: set up default values
fastread=''
reuseval=false
config_sh=''
alldone=''
error=''
silent=''
extractsh=''
override=''
knowitall=''
rm -f optdef.sh posthint.sh
cat >optdef.sh <<EOS
$startsh
EOS


: option parsing
while test $# -gt 0; do
	case "$1" in
	-d) shift; fastread=yes;;
	-e) shift; alldone=cont;;
	-f)
		shift
		cd ..
		if test -r "$1"; then
			config_sh="$1"
		else
			echo "$me: cannot read config file $1." >&2
			error=true
		fi
		cd UU
		shift;;
	-h) shift; error=true;;
	-r) shift; reuseval=true;;
	-s) shift; silent=true; realsilent=true;;
	-E) shift; alldone=exit;;
	-K) shift; knowitall=true;;
	-O) shift; override=true;;
	-S) shift; silent=true; extractsh=true;;
	-D)
		shift
		case "$1" in
		*=)
			echo "$me: use '-U symbol=', not '-D symbol='." >&2
			echo "$me: ignoring -D $1" >&2
			;;
		*=*) echo "$1" | \
				sed -e "s/'/'\"'\"'/g" -e "s/=\(.*\)/='\1'/" >> optdef.sh;;
		*) echo "$1='define'" >> optdef.sh;;
		esac
		shift
		;;
	-U)
		shift
		case "$1" in
		*=) echo "$1" >> optdef.sh;;
		*=*)
			echo "$me: use '-D symbol=val', not '-U symbol=val'." >&2
			echo "$me: ignoring -U $1" >&2
			;;
		*) echo "$1='undef'" >> optdef.sh;;
		esac
		shift
		;;
	-A)
	    shift
	    xxx=''
	    yyy="$1"
	    zzz=''
	    uuu=undef
	    case "$yyy" in
            *=*) zzz=`echo $yyy|sed 's!=.*!!'`
                 case "$zzz" in
                 *:*) zzz='' ;;
                 *)   xxx=append
                      zzz=" "`echo $yyy|sed 's!^[^=]*=!!'` 
                      yyy=`echo $yyy|sed 's!=.*!!'` ;;
                 esac
                 ;;
            esac
            case "$xxx" in
            '')  case "$yyy" in
                 *:*) xxx=`echo $yyy|sed 's!:.*!!'`
                      yyy=`echo $yyy|sed 's!^[^:]*:!!'`
                      zzz=`echo $yyy|sed 's!^[^=]*=!!'`
                      yyy=`echo $yyy|sed 's!=.*!!'` ;;
                 *)   xxx=`echo $yyy|sed 's!:.*!!'`
                      yyy=`echo $yyy|sed 's!^[^:]*:!!'` ;;
                 esac
                 ;;       
            esac
	    case "$xxx" in
	    append)
		echo "$yyy=\"\${$yyy}$zzz\""	>> posthint.sh ;;
	    clear)
		echo "$yyy=''"			>> posthint.sh ;;
	    define)
	        case "$zzz" in
		'') zzz=define ;;
		esac
		echo "$yyy='$zzz'"		>> posthint.sh ;;
	    eval)
		echo "eval \"$yyy=$zzz\""	>> posthint.sh ;;
	    prepend)
		echo "$yyy=\"$zzz\${$yyy}\""	>> posthint.sh ;;
	    undef)
	        case "$zzz" in
		'') zzz="$uuu" ;;
		esac
		echo "$yyy=$zzz"		>> posthint.sh ;;
            *)  echo "$me: unknown -A command '$xxx', ignoring -A $1" >&2 ;;
	    esac
	    shift
	    ;;
	-V) echo "$me generated by metaconfig 3.0 PL70." >&2
	    exit 0;;
	--) break;;
	-*) echo "$me: unknown option $1" >&2; shift; error=true;;
	*) break;;
	esac
done

case "$error" in
true)
	cat >&2 <<EOM
Usage: $me [-dehrsEKOSV] [-f config.sh] [-D symbol] [-D symbol=value]
                 [-U symbol] [-U symbol=] [-A command:symbol...]
  -d : use defaults for all answers.
  -e : go on without questioning past the production of config.sh.
  -f : specify an alternate default configuration file.
  -h : print this help message and exit (with an error status).
  -r : reuse C symbols value if possible (skips costly nm extraction).
  -s : silent mode, only echoes questions and essential information.
  -D : define symbol to have some value:
         -D symbol         symbol gets the value 'define'
         -D symbol=value   symbol gets the value 'value'
  -E : stop at the end of questions, after having produced config.sh.
  -K : do not use unless you know what you are doing.
  -O : let -D and -U override definitions from loaded configuration file.
  -S : perform variable substitutions on all .SH files (can mix with -f)
  -U : undefine symbol:
         -U symbol    symbol gets the value 'undef'
         -U symbol=   symbol gets completely empty
  -A : manipulate symbol after the platform specific hints have been applied:
	 -A symbol=value		append " "value to symbol
	 -A append:symbol=value		append value to symbol
	 -A define:symbol=value		define symbol to have value
         -A clear:symbol		define symbol to be ''
	 -A define:symbol		define symbol to be 'define'
	 -A eval:symbol=value		define symbol to be eval of value
	 -A prepend:symbol=value	prepend value to symbol
	 -A undef:symbol		define symbol to be 'undef'
	 -A undef:symbol=		define symbol to be ''
  -V : print version number and exit (with a zero status).
EOM
	exit 1
	;;
esac

: Sanity checks
case "$fastread$alldone" in
yescont|yesexit) ;;
*)
	case "$extractsh" in
	true) ;;
	*)
		if test ! -t 0; then
			echo "Say 'sh Configure', not 'sh <Configure'"
			exit 1
		fi
		;;
	esac
	;;
esac

exec 4>&1
case "$silent" in
true) exec 1>/dev/null;;
esac

: run the defines and the undefines, if any, but leave the file out there...
touch optdef.sh
. ./optdef.sh
: create the posthint manipulation script and leave the file out there...
touch posthint.sh

: set package name
package=perl5
first=`echo $package | sed -e 's/^\(.\).*/\1/'`
last=`echo $package | sed -e 's/^.\(.*\)/\1/'`
case "`echo AbyZ | tr '[:lower:]' '[:upper:]' 2>/dev/null`" in
ABYZ) spackage=`echo $first | tr '[:lower:]' '[:upper:]'`$last;;
*) spackage=`echo $first | tr '[a-z]' '[A-Z]'`$last;;
esac

: Some greps do not return status, grrr.
echo "grimblepritz" >grimble
if grep blurfldyick grimble >/dev/null 2>&1 ; then
	contains=contains
elif grep grimblepritz grimble >/dev/null 2>&1 ; then
	contains=grep
else
	contains=contains
fi
rm -f grimble
: the following should work in any shell
case "$contains" in
contains*)
	echo " "
	echo "AGH!  Grep doesn't return a status.  Attempting remedial action."
	cat >contains <<'EOSS'
grep "$1" "$2" >.greptmp && cat .greptmp && test -s .greptmp
EOSS
chmod +x contains
esac

: Find the path to the source tree
case "$src" in
'') case "$0" in
    */*) src=`echo $0 | sed -e 's%/[^/][^/]*$%%'`
         case "$src" in
	 /*)	;;
         *)	src=`cd ../$src && pwd` ;;
	 esac
         ;;
    *)   src='.';;
    esac;;
esac
case "$src" in
'')	src=/
	rsrc=/
	;;
/*) rsrc="$src";;
*) rsrc="../$src";;
esac
if test -f $rsrc/Configure && \
	$contains "^package=$package$" $rsrc/Configure >/dev/null 2>&1
then
   : found it, so we are ok.
else
	rsrc=''
	for src in . .. ../.. ../../.. ../../../..; do
		if test -f ../$src/Configure && \
			$contains "^package=$package$" ../$src/Configure >/dev/null 2>&1
		then
			rsrc=../$src
			break
		fi
	done
fi
case "$rsrc" in
'')
	cat <<EOM >&4

Sorry, I can't seem to locate the source dir for $package.  Please start
Configure with an explicit path -- i.e. /some/path/Configure.

EOM
	exit 1
	;;
../.)	rsrc='..';;
*)
	echo " "
	echo "Sources for $package found in \"$src\"." >&4
	;;
esac

: script used to extract .SH files with variable substitutions
cat >extract <<'EOS'
CONFIGDOTSH=true
echo "Doing variable substitutions on .SH files..."
if test -f $src/MANIFEST; then
	set x `awk '{print $1}' <$src/MANIFEST | grep '\.SH$'`
else
	echo "(Looking for .SH files under the source directory.)"
	set x `(cd $src; find . -name "*.SH" -print)`
fi
shift
case $# in
0) set x `(cd $src; echo *.SH)`; shift;;
esac
if test ! -f $src/$1; then
	shift
fi
mkdir_p='
name=$1;
create="";
while test $name; do
	if test ! -d "$name"; then
		create="$name $create";
		name=`echo $name | sed -e "s|^[^/]*$||"`;
		name=`echo $name | sed -e "s|\(.*\)/.*|\1|"`;
	else
		name="";
	fi;
done;
for file in $create; do
	mkdir $file;
done
'
for file in $*; do
	case "$src" in
	".")
		case "$file" in
		*/*)
			dir=`expr X$file : 'X\(.*\)/'`
			file=`expr X$file : 'X.*/\(.*\)'`
			(cd $dir && . ./$file)
			;;
		*)
			. ./$file
			;;
		esac
		;;
	*)
		case "$file" in
		*/*)
			dir=`expr X$file : 'X\(.*\)/'`
			file=`expr X$file : 'X.*/\(.*\)'`
			(set x $dir; shift; eval $mkdir_p)
			sh <$src/$dir/$file
			;;
		*)
			sh <$src/$file
			;;
		esac
		;;
	esac
done
if test -f $src/config_h.SH; then
	if test ! -f config.h; then
	: oops, they left it out of MANIFEST, probably, so do it anyway.
	. $src/config_h.SH
	fi
fi
EOS

: extract files and exit if asked to do so
case "$extractsh" in
true)
	case "$realsilent" in
	true) ;;
	*) exec 1>&4;;
	esac
	case "$config_sh" in
	'') config_sh='config.sh';;
	esac
	echo " "
	echo "Fetching answers from $config_sh..."
	cd ..
	. $config_sh
	test "$override" && . ./optdef.sh
	echo " "
	. UU/extract
	rm -rf UU
	echo "Done."
	exit 0
	;;
esac

: Eunice requires " " instead of "", can you believe it
echo " "
: Here we go...
echo "Beginning of configuration questions for $package."

trap 'echo " "; test -d ../UU && rm -rf X $rmlist; exit 1' 1 2 3 15

: first determine how to suppress newline on echo command
echo " "
echo "Checking echo to see how to suppress newlines..."
(echo "hi there\c" ; echo " ") >.echotmp
if $contains c .echotmp >/dev/null 2>&1 ; then
	echo "...using -n."
	n='-n'
	c=''
else
	cat <<'EOM'
...using \c
EOM
	n=''
	c='\c'
fi
echo $n "The star should be here-->$c"
echo '*'
rm -f .echotmp

: Now test for existence of everything in MANIFEST
echo " "
if test -f $rsrc/MANIFEST; then
	echo "First let's make sure your kit is complete.  Checking..." >&4
	awk '$1 !~ /PACK[A-Z]+/ {print $1}' $rsrc/MANIFEST | split -50
	rm -f missing
	tmppwd=`pwd`
	for filelist in x??; do
		(cd $rsrc; ls `cat $tmppwd/$filelist` >/dev/null 2>>$tmppwd/missing)
	done
	if test -s missing; then
		cat missing >&4
		cat >&4 <<'EOM'

THIS PACKAGE SEEMS TO BE INCOMPLETE.

You have the option of continuing the configuration process, despite the
distinct possibility that your kit is damaged, by typing 'y'es.  If you
do, don't blame me if something goes wrong.  I advise you to type 'n'o
and contact the author (perlbug@perl.org).

EOM
		echo $n "Continue? [n] $c" >&4
		read ans
		case "$ans" in
		y*)
			echo "Continuing..." >&4
			rm -f missing
			;;
		*)
			echo "ABORTING..." >&4
			kill $$
			;;
		esac
	else
		echo "Looks good..."
	fi
else
	echo "There is no MANIFEST file.  I hope your kit is complete !"
fi
rm -f missing x??

echo " "
: Find the appropriate value for a newline for tr
if test -n "$DJGPP"; then
       trnl='\012'
fi
if test X"$trnl" = X; then
	case "`echo foo|tr '\n' x 2>/dev/null`" in
	foox) trnl='\n' ;;
	esac
fi
if test X"$trnl" = X; then
	case "`echo foo|tr '\012' x 2>/dev/null`" in
	foox) trnl='\012' ;;
	esac
fi
if test X"$trnl" = X; then
	cat <<EOM >&2

$me: Fatal Error: cannot figure out how to translate newlines with 'tr'.

EOM
	exit 1
fi

: compute the number of columns on the terminal for proper question formatting
case "$COLUMNS" in
'') COLUMNS='80';;
esac

: set up the echo used in my read
myecho="case \"\$xxxm\" in
'') echo $n \"\$rp $c\" >&4;;
*) case \"\$rp\" in
	'') echo $n \"[\$xxxm] $c\";;
	*)
		if test \`echo \"\$rp [\$xxxm]  \" | wc -c\` -ge $COLUMNS; then
			echo \"\$rp\" >&4
			echo $n \"[\$xxxm] $c\" >&4
		else
			echo $n \"\$rp [\$xxxm] $c\" >&4
		fi
		;;
	esac;;
esac"

: now set up to do reads with possible shell escape and default assignment
cat <<EOSC >myread
$startsh
xxxm=\$dflt
$myecho
ans='!'
case "\$fastread" in
yes) case "\$dflt" in
	'') ;;
	*) ans='';
		case "\$silent-\$rp" in
		true-) ;;
		*) echo " " >&4;;
		esac;;
	esac;;
*) case "\$silent" in
	true) case "\$rp" in
		'') ans='';;
		esac;;
	esac;;
esac
while expr "X\$ans" : "X!" >/dev/null; do
	read answ
	set x \$xxxm
	shift
	aok=''; eval "ans=\\"\$answ\\"" && aok=y
	case  "\$answ" in
	"!")
		sh 1>&4
		echo " "
		$myecho
		;;
	!*)
		set x \`expr "X\$ans" : "X!\(.*\)\$"\`
		shift
		sh 1>&4 -c "\$*"
		echo " "
		$myecho
		;;
	"\$ans")
		case "\$ans" in
		\\&*)
			set x \`expr "X\$ans" : "X&\(.*\)\$"\`
			shift
			case "\$1" in
			-d)
				fastread=yes
				echo "(OK, I'll run with -d after this question.)" >&4
				;;
			-*)
				echo "*** Sorry, \$1 not supported yet." >&4
				;;
			esac
			$myecho
			ans=!
			;;
		esac;;
	*)
		case "\$aok" in
		y)
			echo "*** Substitution done -- please confirm."
			xxxm="\$ans"
			ans=\`echo $n "\$ans$c" | tr '$trnl' ' '\`
			xxxm="\$ans"
			ans=!
			;;
		*)
			echo "*** Error -- try again."
			ans=!
			;;
		esac
		$myecho
		;;
	esac
	case "\$ans\$xxxm\$nostick" in
	'')
		ans=!
		$myecho
		;;
	esac
done
case "\$ans" in
'') ans="\$xxxm";;
esac
EOSC

: create .config dir to save info across Configure sessions
test -d ../.config || mkdir ../.config
cat >../.config/README <<EOF
This directory created by Configure to save information that should
persist across sessions for $package.

You may safely delete it if you wish.
EOF

xversion=`awk '/define[ 	]+PERL_VERSION/ {print $3}' $rsrc/patchlevel.h`
case "$usedevel" in
$define|true|[yY]*) ;;
*) case "$xversion" in
   *[13579])
	cat >&4 <<EOH
*** WHOA THERE!!! ***

    This is an UNSTABLE DEVELOPMENT release.
    The version of this $package distribution is $xversion, that is, odd,
    (as opposed to even) and that signifies a development release.
    If you want a maintenance release, you want an even-numbered version.

    Do ***NOT*** install this into production use.
    Data corruption and crashes are possible.

    It is most seriously suggested that you do not continue any further
    unless you want to help in developing and debugging Perl.

EOH
	rp='Do you really want to continue?'
	dflt='n'
	. ./myread
	case "$ans" in
	[yY]) echo >&4 "Okay, continuing." ;;
	*) echo >&4 "Okay, bye."
	   exit 1
	   ;;
	esac
	;;
    esac
    ;;
esac

: general instructions
needman=true
firsttime=true
user=`(logname) 2>/dev/null`
case "$user" in
'') user=`whoami 2>&1`;;
esac
if $contains "^$user\$" ../.config/instruct >/dev/null 2>&1; then
	firsttime=false
	echo " "
	rp='Would you like to see the instructions?'
	dflt=n
	. ./myread
	case "$ans" in
	[yY]*) ;;
	*) needman=false;;
	esac
fi
if $needman; then
	cat <<EOH

This installation shell script will examine your system and ask you questions
to determine how the perl5 package should be installed. If you get
stuck on a question, you may use a ! shell escape to start a subshell or
execute a command.  Many of the questions will have default answers in square
brackets; typing carriage return will give you the default.

On some of the questions which ask for file or directory names you are allowed
to use the ~name construct to specify the login directory belonging to "name",
even if you don't have a shell which knows about that.  Questions where this is
allowed will be marked "(~name ok)".

EOH
	rp=''
	dflt='Type carriage return to continue'
	. ./myread
	cat <<'EOH'

The prompter used in this script allows you to use shell variables and
backticks in your answers.  You may use $1, $2, etc...  to refer to the words
in the default answer, as if the default line was a set of arguments given to a
script shell.  This means you may also use $* to repeat the whole default line,
so you do not have to re-type everything to add something to the default.

Everytime there is a substitution, you will have to confirm.  If there is an
error (e.g. an unmatched backtick), the default answer will remain unchanged
and you will be prompted again.

If you are in a hurry, you may run 'Configure -d'.  This will bypass nearly all
the questions and use the computed defaults (or the previous answers if there
was already a config.sh file). Type 'Configure -h' for a list of options.
You may also start interactively and then answer '& -d' at any prompt to turn
on the non-interactive behaviour for the remainder of the execution.

EOH
	. ./myread
	cat <<EOH

Much effort has been expended to ensure that this shell script will run on any
Unix system.  If despite that it blows up on yours, your best bet is to edit
Configure and run it again.  If you can't run Configure for some reason,
you'll have to generate a config.sh file by hand.  Whatever problems you
have, let me (perlbug@perl.org) know how I blew it.

This installation script affects things in two ways:

1) it may do direct variable substitutions on some of the files included
   in this kit.
2) it builds a config.h file for inclusion in C programs.  You may edit
   any of these files as the need arises after running this script.

If you make a mistake on a question, there is no easy way to back up to it
currently.  The easiest thing to do is to edit config.sh and rerun all the SH
files.  Configure will offer to let you do this before it runs the SH files.

EOH
	dflt='Type carriage return to continue'
	. ./myread
	case "$firsttime" in
	true) echo $user >>../.config/instruct;;
	esac
fi

: find out where common programs are
echo " "
echo "Locating common programs..." >&4
cat <<EOSC >loc
$startsh
case \$# in
0) exit 1;;
esac
thing=\$1
shift
dflt=\$1
shift
for dir in \$*; do
	case "\$thing" in
	.)
	if test -d \$dir/\$thing; then
		echo \$dir
		exit 0
	fi
	;;
	*)
	for thisthing in \$dir/\$thing; do
		: just loop through to pick last item
	done
	if test -f \$thisthing; then
		echo \$thisthing
		exit 0
	elif test -f \$dir/\$thing.exe; then
		if test -n "$DJGPP"; then
			echo \$dir/\$thing.exe
		else
			: on Eunice apparently
			echo \$dir/\$thing
		fi
		exit 0
	fi
	;;
	esac
done
echo \$dflt
exit 1
EOSC
chmod +x loc
$eunicefix loc
loclist="
awk
cat
comm
cp
echo
expr
grep
ls
make
mkdir
rm
sed
sort
touch
tr
uniq
"
trylist="
Mcc
ar
byacc
cpp
csh
date
egrep
gzip
less
ln
more
nm
nroff
pg
test
uname
zip
"
pth=`echo $PATH | sed -e "s/$p_/ /g"`
pth="$pth /lib /usr/lib"
for file in $loclist; do
	eval xxx=\$$file
	case "$xxx" in
	/*|?:[\\/]*)
		if test -f "$xxx"; then
			: ok
		else
			echo "WARNING: no $xxx -- ignoring your setting for $file." >&4
			xxx=`./loc $file $file $pth`
		fi
		;;
	'') xxx=`./loc $file $file $pth`;;
	*) xxx=`./loc $xxx $xxx $pth`;;
	esac
	eval $file=$xxx
	eval _$file=$xxx
	case "$xxx" in
	/*)
		echo $file is in $xxx.
		;;
	?:[\\/]*)
		echo $file is in $xxx.
		;;
	*)
		echo "I don't know where '$file' is, and my life depends on it." >&4
		echo "Go find a public domain implementation or fix your PATH setting!" >&4
		exit 1
		;;
	esac
done
echo " "
echo "Don't worry if any of the following aren't found..."
say=offhand
for file in $trylist; do
	eval xxx=\$$file
	case "$xxx" in
	/*|?:[\\/]*)
		if test -f "$xxx"; then
			: ok
		else
			echo "WARNING: no $xxx -- ignoring your setting for $file." >&4
			xxx=`./loc $file $file $pth`
		fi
		;;
	'') xxx=`./loc $file $file $pth`;;
	*) xxx=`./loc $xxx $xxx $pth`;;
	esac
	eval $file=$xxx
	eval _$file=$xxx
	case "$xxx" in
	/*)
		echo $file is in $xxx.
		;;
	?:[\\/]*)
		echo $file is in $xxx.
		;;
	*)
		echo "I don't see $file out there, $say."
		say=either
		;;
	esac
done
case "$egrep" in
egrep)
	echo "Substituting grep for egrep."
	egrep=$grep
	;;
esac
case "$ln" in
ln)
	echo "Substituting cp for ln."
	ln=$cp
	;;
esac
case "$test" in
test)
	echo "Hopefully test is built into your sh."
	;;
*)
	if `sh -c "PATH= test true" >/dev/null 2>&1`; then
		echo "Using the test built into your sh."
		test=test
		_test=test
	fi
	;;
esac
case "$echo" in
echo)
	echo "Hopefully echo is built into your sh."
	;;
'') ;;
*)
	echo " "
echo "Checking compatibility between $echo and builtin echo (if any)..." >&4
	$echo $n "hi there$c" >foo1
	echo $n "hi there$c" >foo2
	if cmp foo1 foo2 >/dev/null 2>&1; then
		echo "They are compatible.  In fact, they may be identical."
	else
		case "$n" in
		'-n') n='' c='\c';;
		*) n='-n' c='';;
		esac
		cat <<FOO
They are not compatible!  You are probably running ksh on a non-USG system.
I'll have to use $echo instead of the builtin, since Bourne shell doesn't
have echo built in and we may have to run some Bourne shell scripts.  That
means I'll have to use '$n$c' to suppress newlines now.  Life is ridiculous.

FOO
		$echo $n "The star should be here-->$c"
		$echo "*"
	fi
	$rm -f foo1 foo2
	;;
esac

cat <<EOS >checkcc
$startsh
EOS
cat <<'EOSC' >>checkcc
case "$cc" in
'') ;;
*)  $rm -f try try.*
    $cat >try.c <<EOM
int main(int argc, char *argv[]) {
  return 0;
}
EOM
    if $cc -o try $ccflags try.c; then
       :
    else
        echo "Uh-oh, the C compiler '$cc' doesn't seem to be working." >&4
        despair=yes
        trygcc=yes
        case "$cc" in
        *gcc*) trygcc=no ;;
        esac
        case "`$cc -v -c try.c 2>&1`" in
        *gcc*) trygcc=no ;;
        esac
        if $test X"$trygcc" = Xyes; then
            if gcc -o try -c try.c; then
                echo " "
                echo "You seem to have a working gcc, though." >&4
                rp="Would you like to use it?"
                dflt=y
                if $test -f myread; then
                    . ./myread
                else
                    if $test -f UU/myread; then
                        . ./UU/myread
                    else
                        echo "Cannot find myread, sorry.  Aborting." >&2
                        exit 1
                    fi
                fi  
                case "$ans" in
                [yY]*) cc=gcc; ccname=gcc; ccflags=''; despair=no ;;
                esac
            fi
        fi
        if $test X"$despair" = Xyes; then
	    $cat >&4 <<EOM
You need to find a working C compiler.
Either (purchase and) install the C compiler supplied by your OS vendor,
or for a free C compiler try http://gcc.gnu.org/
I cannot continue any further, aborting.
EOM
            exit 1
        fi
    fi
    $rm -f try try.*
    ;;
esac
EOSC

: determine whether symbolic links are supported
echo " "
$touch blurfl
if $ln -s blurfl sym > /dev/null 2>&1 ; then
	echo "Symbolic links are supported." >&4
	lns="$ln -s"
else
	echo "Symbolic links are NOT supported." >&4
	lns="$ln"
fi
$rm -f blurfl sym

: see whether [:lower:] and [:upper:] are supported character classes
echo " "
case "`echo AbyZ | $tr '[:lower:]' '[:upper:]' 2>/dev/null`" in
ABYZ)
	echo "Good, your tr supports [:lower:] and [:upper:] to convert case." >&4
	up='[:upper:]'
	low='[:lower:]'
	;;
*)	# There is a discontinuity in EBCDIC between 'I' and 'J'
        # (0xc9 and 0xd1), therefore that is a nice testing point.
        if test "X$up" = X -o "X$low" = X; then
	    case "`echo IJ | $tr '[I-J]' '[i-j]' 2>/dev/null`" in
	    ij) up='[A-Z]'
	        low='[a-z]'
		;;
	    esac
        fi
	if test "X$up" = X -o "X$low" = X; then
	    case "`echo IJ | $tr I-J i-j 2>/dev/null`" in
	    ij) up='A-Z'
		low='a-z'
		;;
	    esac
        fi
	if test "X$up" = X -o "X$low" = X; then
	    case "`echo IJ | od -x 2>/dev/null`" in
	    *C9D1*|*c9d1*)
		echo "Hey, this might be EBCDIC." >&4
		if test "X$up" = X -o "X$low" = X; then
		    case "`echo IJ | $tr '[A-IJ-RS-Z]' '[a-ij-rs-z]' 2>/dev/null`" in
		    ij) up='[A-IJ-RS-Z]'
		        low='[a-ij-rs-z]'
			;;
		    esac
		fi
		if test "X$up" = X -o "X$low" = X; then
		    case "`echo IJ | $tr A-IJ-RS-Z a-ij-rs-z 2>/dev/null`" in
		    ij) up='A-IJ-RS-Z'
		        low='a-ij-rs-z'
			;;
		    esac
		fi
		;;
	    esac
	fi
esac
case "`echo IJ | $tr \"$up\" \"$low\" 2>/dev/null`" in
ij)
    echo "Using $up and $low to convert case." >&4
    ;;
*)
    echo "I don't know how to translate letters from upper to lower case." >&4
    echo "Your tr is not acting any way I know of." >&4
    exit 1
    ;;
esac
: set up the translation script tr, must be called with ./tr of course
cat >tr <<EOSC
$startsh
case "\$1\$2" in
'[A-Z][a-z]') exec $tr '$up' '$low';;
'[a-z][A-Z]') exec $tr '$low' '$up';;
esac
exec $tr "\$@"
EOSC
chmod +x tr
$eunicefix tr

: Try to determine whether config.sh was made on this system
case "$config_sh" in
'')
myuname=`$uname -a 2>/dev/null`
$test -z "$myuname" && myuname=`hostname 2>/dev/null`
# tr '[A-Z]' '[a-z]' would not work in EBCDIC
# because the A-Z/a-z are not consecutive.
myuname=`echo $myuname | $sed -e 's/^[^=]*=//' -e 's/\///g' | \
	./tr '[A-Z]' '[a-z]' | $tr $trnl ' '`
newmyuname="$myuname"
dflt=n
case "$knowitall" in
'')
	if test -f ../config.sh; then
		if $contains myuname= ../config.sh >/dev/null 2>&1; then
			eval "`grep myuname= ../config.sh`"
		fi
		if test "X$myuname" = "X$newmyuname"; then
			dflt=y
		fi
	fi
	;;
*) dflt=y;;
esac

: Get old answers from old config file if Configure was run on the
: same system, otherwise use the hints.
hint=default
cd ..
if test -f config.sh; then
	echo " "
	rp="I see a config.sh file.  Shall I use it to set the defaults?"
	. UU/myread
	case "$ans" in
	n*|N*) echo "OK, I'll ignore it."
		mv config.sh config.sh.old
		myuname="$newmyuname"
		;;
	*)  echo "Fetching default answers from your old config.sh file..." >&4
		tmp_n="$n"
		tmp_c="$c"
		tmp_sh="$sh"
		. ./config.sh
		cp config.sh UU
		n="$tmp_n"
		c="$tmp_c"
		: Older versions did not always set $sh.  Catch re-use of such
		: an old config.sh.
		case "$sh" in
		'') sh="$tmp_sh" ;;
		esac
		hint=previous
		;;
	esac
fi
. ./UU/checkcc
if test ! -f config.sh; then
	$cat <<EOM

First time through, eh?  I have some defaults handy for some systems
that need some extra help getting the Configure answers right:

EOM
	(cd $src/hints; ls -C *.sh) | $sed 's/\.sh/   /g' >&4
	dflt=''
	: Half the following guesses are probably wrong... If you have better
	: tests or hints, please send them to perlbug@perl.org
	: The metaconfig authors would also appreciate a copy...
	$test -f /irix && osname=irix
	$test -f /xenix && osname=sco_xenix
	$test -f /dynix && osname=dynix
	$test -f /dnix && osname=dnix
	$test -f /lynx.os && osname=lynxos
	$test -f /unicos && osname=unicos && osvers=`$uname -r`
	$test -f /unicosmk && osname=unicosmk && osvers=`$uname -r`
	$test -f /unicosmk.ar && osname=unicosmk && osvers=`$uname -r`
	$test -f /bin/mips && /bin/mips && osname=mips
	$test -d /NextApps && set X `hostinfo | grep 'NeXT Mach.*:' | \
		$sed -e 's/://' -e 's/\./_/'` && osname=next && osvers=$4
	$test -d /usr/apollo/bin && osname=apollo
	$test -f /etc/saf/_sactab && osname=svr4
	$test -d /usr/include/minix && osname=minix
	if $test -d /MachTen -o -d /MachTen_Folder; then
		osname=machten
		if $test -x /sbin/version; then
			osvers=`/sbin/version | $awk '{print $2}' |
			$sed -e 's/[A-Za-z]$//'`
		elif $test -x /usr/etc/version; then
			osvers=`/usr/etc/version | $awk '{print $2}' |
			$sed -e 's/[A-Za-z]$//'`
		else
			osvers="$2.$3"
		fi
	fi

	$test -f /sys/posix.dll &&
		$test -f /usr/bin/what &&
		set X `/usr/bin/what /sys/posix.dll` &&
		$test "$3" = UWIN &&
		osname=uwin &&
		osvers="$5"

	if $test -f $uname; then
		set X $myuname
		shift

		case "$5" in
		fps*) osname=fps ;;
		mips*)
			case "$4" in
			umips) osname=umips ;;
			*) osname=mips ;;
			esac;;
		[23]100) osname=mips ;;
		next*) osname=next ;;
		i386*)
			tmp=`/bin/uname -X 2>/dev/null|awk '/3\.2v[45]/{ print $(NF) }'`
			if $test "$tmp" != "" -a "$3" = "3.2" -a -f '/etc/systemid'; then
				osname='sco'
				osvers=$tmp
			elif $test -f /etc/kconfig; then
				osname=isc
				if test "$lns" = "$ln -s"; then
					osvers=4
				elif $contains _SYSV3 /usr/include/stdio.h > /dev/null 2>&1 ; then
					osvers=3
				elif $contains _POSIX_SOURCE /usr/include/stdio.h > /dev/null 2>&1 ; then
					osvers=2
				fi
			fi
			tmp=''
			;;
		pc*)
			if test -n "$DJGPP"; then
				osname=dos
				osvers=djgpp
			fi
			;;
		esac

		case "$1" in
		aix) osname=aix
			tmp=`( (oslevel) 2>/dev/null || echo "not found") 2>&1`
			case "$tmp" in
			'not found') osvers="$4"."$3" ;;
			'<3240'|'<>3240') osvers=3.2.0 ;;
			'=3240'|'>3240'|'<3250'|'<>3250') osvers=3.2.4 ;;
			'=3250'|'>3250') osvers=3.2.5 ;;
			*) osvers=$tmp;;
			esac
			;;
		bsd386) osname=bsd386
			osvers=`$uname -r`
			;;
		cygwin*) osname=cygwin
			osvers="$3"
			;;
		*dc.osx) osname=dcosx
			osvers="$3"
			;;
		dnix) osname=dnix
			osvers="$3"
			;;
		domainos) osname=apollo
			osvers="$3"
			;;
		dgux) osname=dgux 
			osvers="$3"
			;;
		dynixptx*) osname=dynixptx
			osvers=`echo "$4"|sed 's/^v//'`
			;;
		freebsd) osname=freebsd 
			osvers="$3" ;;
		genix) osname=genix ;;
		hp*) osname=hpux 
			osvers=`echo "$3" | $sed 's,.*\.\([0-9]*\.[0-9]*\),\1,'`
			;;
		irix*) osname=irix
			case "$3" in
			4*) osvers=4 ;;
			5*) osvers=5 ;;
			*)	osvers="$3" ;;
			esac
			;;
		linux) osname=linux
			case "$3" in
			*)	osvers="$3" ;;
			esac
			;;
		MiNT) osname=mint
			;;
		netbsd*) osname=netbsd
			osvers="$3"
			;;
		news-os) osvers="$3"
			case "$3" in
			4*) osname=newsos4 ;;
			*) osname=newsos ;;
			esac
			;;
		next*) osname=next ;;
		nonstop-ux) osname=nonstopux ;;
		POSIX-BC | posix-bc ) osname=posix-bc
			osvers="$3"
			;;
		powerux | power_ux | powermax_os | powermaxos | \
		powerunix | power_unix) osname=powerux
			osvers="$3"
			;;
		qnx) osname=qnx
			osvers="$4"
			;;
		solaris) osname=solaris
			case "$3" in
			5*) osvers=`echo $3 | $sed 's/^5/2/g'` ;;
			*)	osvers="$3" ;;
			esac
			;;
		sunos) osname=sunos
			case "$3" in
			5*) osname=solaris
				osvers=`echo $3 | $sed 's/^5/2/g'` ;;
			*)	osvers="$3" ;;
			esac
			;;
		titanos) osname=titanos
			case "$3" in
			1*) osvers=1 ;;
			2*) osvers=2 ;;
			3*) osvers=3 ;;
			4*) osvers=4 ;;
			*)	osvers="$3" ;;
			esac
			;;
		ultrix) osname=ultrix
			osvers="$3"
			;;
		osf1|mls+)	case "$5" in
				alpha)
					osname=dec_osf
					osvers=`sizer -v | awk '{print $3}' |  tr '[A-Z]' '[a-z]' | sed 's/^[xvt]//'`
					case "$osvers" in
					[1-9].[0-9]*) ;;
					*) osvers=`echo "$3" | sed 's/^[xvt]//'` ;;
					esac
					;;
			hp*)	osname=hp_osf1	;;
			mips)	osname=mips_osf1 ;;
			esac
			;;
		unixware) osname=svr5
			osvers="$4"
			;;
		uts) osname=uts
			osvers="$3"
			;;
		$2) case "$osname" in
			*isc*) ;;
			*freebsd*) ;;
			svr*)
				: svr4.x or possibly later
				case "svr$3" in	
				${osname}*)
					osname=svr$3
					osvers=$4
					;;
				esac
				case "$osname" in
				svr4.0)
					: Check for ESIX
					if test -f /stand/boot ; then
						eval `grep '^INITPROG=[a-z/0-9]*$' /stand/boot`
						if test -n "$INITPROG" -a -f "$INITPROG"; then
			isesix=`strings -a $INITPROG|grep 'ESIX SYSTEM V/386 Release 4.0'`
							if test -n "$isesix"; then
								osname=esix4
							fi
						fi
					fi
					;;
				esac
				;;
			*)	if test -f /etc/systemid; then
					osname=sco
					set `echo $3 | $sed 's/\./ /g'` $4
					if $test -f $src/hints/sco_$1_$2_$3.sh; then
						osvers=$1.$2.$3
					elif $test -f $src/hints/sco_$1_$2.sh; then
						osvers=$1.$2
					elif $test -f $src/hints/sco_$1.sh; then
						osvers=$1
					fi
				else
					case "$osname" in
					'') : Still unknown.  Probably a generic Sys V.
						osname="sysv"
						osvers="$3"
						;;
					esac
				fi
				;;
			esac
			;;
		*)	case "$osname" in
			'') : Still unknown.  Probably a generic BSD.
				osname="$1"
				osvers="$3"
				;;
			esac
			;;
		esac
	else
		if test -f /vmunix -a -f $src/hints/news_os.sh; then
			(what /vmunix | UU/tr '[A-Z]' '[a-z]') > UU/kernel.what 2>&1
			if $contains news-os UU/kernel.what >/dev/null 2>&1; then
				osname=news_os
			fi
			$rm -f UU/kernel.what
		elif test -d c:/.; then
			set X $myuname
			osname=os2
			osvers="$5"
		fi
	fi
	
	: Now look for a hint file osname_osvers, unless one has been
	: specified already.
	case "$hintfile" in
	''|' ')
		file=`echo "${osname}_${osvers}" | $sed -e 's%\.%_%g' -e 's%_$%%'`
		: Also try without trailing minor version numbers.
		xfile=`echo $file | $sed -e 's%_[^_]*$%%'`
		xxfile=`echo $xfile | $sed -e 's%_[^_]*$%%'`
		xxxfile=`echo $xxfile | $sed -e 's%_[^_]*$%%'`
		xxxxfile=`echo $xxxfile | $sed -e 's%_[^_]*$%%'`
		case "$file" in
		'') dflt=none ;;
		*)  case "$osvers" in
			'') dflt=$file
				;;
			*)  if $test -f $src/hints/$file.sh ; then
					dflt=$file
				elif $test -f $src/hints/$xfile.sh ; then
					dflt=$xfile
				elif $test -f $src/hints/$xxfile.sh ; then
					dflt=$xxfile
				elif $test -f $src/hints/$xxxfile.sh ; then
					dflt=$xxxfile
				elif $test -f $src/hints/$xxxxfile.sh ; then
					dflt=$xxxxfile
				elif $test -f "$src/hints/${osname}.sh" ; then
					dflt="${osname}"
				else
					dflt=none
				fi
				;;
			esac
			;;
		esac
		if $test -f Policy.sh ; then
			case "$dflt" in
			*Policy*) ;;
			none) dflt="Policy" ;;
			*) dflt="Policy $dflt" ;;
			esac
		fi
		;;
	*)
		dflt=`echo $hintfile | $sed 's/\.sh$//'`
		;;
	esac

	if $test -f Policy.sh ; then
		$cat <<EOM

There's also a Policy hint file available, which should make the
site-specific (policy) questions easier to answer.
EOM

	fi

	$cat <<EOM

You may give one or more space-separated answers, or "none" if appropriate.
A well-behaved OS will have no hints, so answering "none" or just "Policy"
is a good thing.  DO NOT give a wrong version or a wrong OS.

EOM

	rp="Which of these apply, if any?"
	. UU/myread
	tans=$ans
	for file in $tans; do
		if $test X$file = XPolicy -a -f Policy.sh; then
			. Policy.sh
			$cat Policy.sh >> UU/config.sh
		elif $test -f $src/hints/$file.sh; then
			. $src/hints/$file.sh
			$cat $src/hints/$file.sh >> UU/config.sh
		elif $test X$tans = X -o X$tans = Xnone ; then
			: nothing
		else
			: Give one chance to correct a possible typo.
			echo "$file.sh does not exist"
			dflt=$file
			rp="hint to use instead?"
			. UU/myread
			for file in $ans; do
				if $test -f "$src/hints/$file.sh"; then
					. $src/hints/$file.sh
					$cat $src/hints/$file.sh >> UU/config.sh
				elif $test X$ans = X -o X$ans = Xnone ; then
					: nothing
				else
					echo "$file.sh does not exist -- ignored."
				fi
			done
		fi
	done

	hint=recommended
	: Remember our hint file for later.
	if $test -f "$src/hints/$file.sh" ; then
		hintfile="$file"
	else
		hintfile=''
	fi
fi
cd UU
;;
*)
	echo " "
	echo "Fetching default answers from $config_sh..." >&4
	tmp_n="$n"
	tmp_c="$c"
	cd ..
	cp $config_sh config.sh 2>/dev/null
	chmod +w config.sh
	. ./config.sh
	cd UU
	cp ../config.sh .
	n="$tmp_n"
	c="$tmp_c"
	hint=previous
	;;
esac
test "$override" && . ./optdef.sh

: Restore computed paths
for file in $loclist $trylist; do
	eval $file="\$_$file"
done

cat << EOM

Configure uses the operating system name and version to set some defaults.
The default value is probably right if the name rings a bell. Otherwise,
since spelling matters for me, either accept the default or answer "none"
to leave it blank.

EOM
case "$osname" in
	''|' ')
		case "$hintfile" in
		''|' '|none) dflt=none ;;
		*)  dflt=`echo $hintfile | $sed -e 's/\.sh$//' -e 's/_.*$//'` ;;
		esac
		;;
	*) dflt="$osname" ;;
esac
rp="Operating system name?"
. ./myread
case "$ans" in
none)  osname='' ;;
*) osname=`echo "$ans" | $sed -e 's/[ 	][	]*/_/g' | ./tr '[A-Z]' '[a-z]'`;;
esac
echo " "
case "$osvers" in
	''|' ')
		case "$hintfile" in
		''|' '|none) dflt=none ;;
		*)	dflt=`echo $hintfile | $sed -e 's/\.sh$//' -e 's/^[^_]*//'`
			dflt=`echo $dflt | $sed -e 's/^_//' -e 's/_/./g'`
			case "$dflt" in
			''|' ') dflt=none ;;
			esac
			;;
		esac
		;;
	*) dflt="$osvers" ;;
esac
rp="Operating system version?"
. ./myread
case "$ans" in
none)  osvers='' ;;
*) osvers="$ans" ;;
esac


. ./posthint.sh

: who configured the system
cf_time=`LC_ALL=C; LANGUAGE=C; export LC_ALL; export LANGUAGE; $date 2>&1`
cf_by=`(logname) 2>/dev/null`
case "$cf_by" in
"")
	cf_by=`(whoami) 2>/dev/null`
	case "$cf_by" in
	"") cf_by=unknown ;;
	esac ;;
esac

: set up the script used to warn in case of inconsistency
cat <<EOS >whoa
$startsh
EOS
cat <<'EOSC' >>whoa
dflt=y
echo " "
echo "*** WHOA THERE!!! ***" >&4
echo "    The $hint value for \$$var on this machine was \"$was\"!" >&4
rp="    Keep the $hint value?"
. ./myread
case "$ans" in
y) td=$was; tu=$was;;
esac
EOSC

: function used to set $1 to $val
setvar='var=$1; eval "was=\$$1"; td=$define; tu=$undef;
case "$val$was" in
$define$undef) . ./whoa; eval "$var=\$td";;
$undef$define) . ./whoa; eval "$var=\$tu";;
*) eval "$var=$val";;
esac'

case "$usethreads" in
$define|true|[yY]*)     dflt='y';;
*) dflt='n';;
esac
cat <<EOM

Perl can be built to take advantage of threads on some systems.
To do so, Configure can be run with -Dusethreads.

Note that threading is a highly experimental feature, and
some known race conditions still remain.  If you choose to try
it, be very sure to not actually deploy it for production
purposes.  README.threads has more details, and is required
reading if you enable threads.

If this doesn't make any sense to you, just accept the default '$dflt'.
EOM
rp='Build a threading Perl?'
. ./myread
case "$ans" in
y|Y)    val="$define" ;;
*)      val="$undef" ;;
esac
set usethreads
eval $setvar

case "$usethreads" in
$define)
	$cat <<EOM

As of 5.5.640, Perl has two different internal threading implementations,
the 5.005 version (5005threads) and an interpreter-based version
(ithreads) that has one interpreter per thread.  Both are very 
experimental.  This arrangement exists to help developers work out
which one is better.

If you're a casual user, you probably don't want interpreter-threads
at this time.  There doesn't yet exist a way to create threads from
within Perl in this model, i.e., "use Thread;" will NOT work.
EOM
	: Default to ithreads unless overridden on command line or with
	: old config.sh
	dflt='y'
	case "$use5005threads" in
		$define|true|[yY]*) dflt='n';;
	esac
	case "$useithreads" in
		$undef|false|[nN]*) dflt='n';;
	esac
	rp='Use interpreter-based ithreads?'
	. ./myread
	case "$ans" in
	y|Y)    val="$define" ;;
	*)      val="$undef" ;;
	esac
	set useithreads
	eval $setvar
	: Now set use5005threads to the opposite value.
	case "$useithreads" in
	$define) val="$undef" ;;
	*) val="$define" ;;
	esac
	set use5005threads
	eval $setvar
	;;
*)
	useithreads="$undef"
	use5005threads="$undef"
	;;
esac

case "$d_oldpthreads" in
'')	: Configure tests would be welcome here.  For now, assume undef.
	val="$undef" ;;
*)	val="$d_oldpthreads" ;;
esac
set d_oldpthreads
eval $setvar


case "$usethreads" in
"$define"|true|[yY]*)
: Look for a hint-file generated 'call-back-unit'.  If the
: user has specified that a threading perl is to be built,
: we may need to set or change some other defaults.
	if $test -f usethreads.cbu; then
		echo "Your platform has some specific hints for threaded builds, using them..."
		. ./usethreads.cbu
	else
		$cat <<EOM
(Your platform doesn't have any specific hints for threaded builds.
 Assuming POSIX threads, then.)
EOM
	fi
	;;
esac

cat <<EOM

Perl can be built so that multiple Perl interpreters can coexist
within the same Perl executable.
EOM

case "$useithreads" in
$define)
	cat <<EOM
This multiple interpreter support is required for interpreter-based threads.
EOM
	val="$define"
	;;
*)	case "$usemultiplicity" in
	$define|true|[yY]*)	dflt='y';;
	*) dflt='n';;
	esac
	echo " "
	echo "If this doesn't make any sense to you, just accept the default '$dflt'."
	rp='Build Perl for multiplicity?'
	. ./myread
	case "$ans" in
	y|Y)	val="$define" ;;
	*)      val="$undef" ;;
	esac
	;;
esac
set usemultiplicity
eval $setvar

: make some quick guesses about what we are up against
echo " "
$echo $n "Hmm...  $c"
echo exit 1 >bsd
echo exit 1 >usg
echo exit 1 >v7
echo exit 1 >osf1
echo exit 1 >eunice
echo exit 1 >xenix
echo exit 1 >venix
echo exit 1 >os2
d_bsd="$undef"
$cat /usr/include/signal.h /usr/include/sys/signal.h >foo 2>/dev/null
if test -f /osf_boot || $contains 'OSF/1' /usr/include/ctype.h >/dev/null 2>&1
then
	echo "Looks kind of like an OSF/1 system, but we'll see..."
	echo exit 0 >osf1
elif test `echo abc | $tr a-z A-Z` = Abc ; then
	xxx=`./loc addbib blurfl $pth`
	if $test -f $xxx; then
	echo "Looks kind of like a USG system with BSD features, but we'll see..."
		echo exit 0 >bsd
		echo exit 0 >usg
	else
		if $contains SIGTSTP foo >/dev/null 2>&1 ; then
			echo "Looks kind of like an extended USG system, but we'll see..."
		else
			echo "Looks kind of like a USG system, but we'll see..."
		fi
		echo exit 0 >usg
	fi
elif $contains SIGTSTP foo >/dev/null 2>&1 ; then
	echo "Looks kind of like a BSD system, but we'll see..."
	d_bsd="$define"
	echo exit 0 >bsd
else
	echo "Looks kind of like a Version 7 system, but we'll see..."
	echo exit 0 >v7
fi
case "$eunicefix" in
*unixtovms*)
	$cat <<'EOI'
There is, however, a strange, musty smell in the air that reminds me of
something...hmm...yes...I've got it...there's a VMS nearby, or I'm a Blit.
EOI
	echo exit 0 >eunice
	d_eunice="$define"
: it so happens the Eunice I know will not run shell scripts in Unix format
	;;
*)
	echo " "
	echo "Congratulations.  You aren't running Eunice."
	d_eunice="$undef"
	;;
esac
: Detect OS2.  The p_ variable is set above in the Head.U unit.
: Note that this also -- wrongly -- detects e.g. dos-djgpp, which also uses
: semicolon as a patch separator
case "$p_" in
:) ;;
*)
	$cat <<'EOI'
I have the feeling something is not exactly right, however...don't tell me...
lemme think...does HAL ring a bell?...no, of course, you're only running OS/2!
(Or you may be running DOS with DJGPP.)
EOI
	echo exit 0 >os2
	;;
esac
if test -f /xenix; then
	echo "Actually, this looks more like a XENIX system..."
	echo exit 0 >xenix
	d_xenix="$define"
else
	echo " "
	echo "It's not Xenix..."
	d_xenix="$undef"
fi
chmod +x xenix
$eunicefix xenix
if test -f /venix; then
	echo "Actually, this looks more like a VENIX system..."
	echo exit 0 >venix
else
	echo " "
	if ./xenix; then
		: null
	else
		echo "Nor is it Venix..."
	fi
fi
chmod +x bsd usg v7 osf1 eunice xenix venix os2
$eunicefix bsd usg v7 osf1 eunice xenix venix os2
$rm -f foo

case "$cc" in
'') dflt=cc;;
*) dflt="$cc";;
esac
rp="Use which C compiler?"
. ./myread
cc="$ans"
: Look for a hint-file generated 'call-back-unit'.  Now that the
: user has specified the compiler, we may need to set or change some
: other defaults.
if $test -f cc.cbu; then
    . ./cc.cbu
fi
. ./checkcc

echo " "
echo "Checking for GNU cc in disguise and/or its version number..." >&4
$cat >gccvers.c <<EOM
#include <stdio.h>
int main() {
#ifdef __GNUC__
#ifdef __VERSION__
	printf("%s\n", __VERSION__);
#else
	printf("%s\n", "1");
#endif
#endif
	exit(0);
}
EOM
if $cc -o gccvers $ldflags gccvers.c; then
	gccversion=`./gccvers`
	case "$gccversion" in
	'') echo "You are not using GNU cc." ;;
	*)  echo "You are using GNU cc $gccversion."
	    ccname=gcc	
	    ;;
	esac
else
	echo " "
	echo "*** WHOA THERE!!! ***" >&4
	echo "    Your C compiler \"$cc\" doesn't seem to be working!" >&4
	case "$knowitall" in
	'')
	echo "    You'd better start hunting for one and let me know about it." >&4
		exit 1
		;;
	esac
fi
$rm -f gccvers*
case "$gccversion" in
1*) cpp=`./loc gcc-cpp $cpp $pth` ;;
esac
case "$gccversion" in
'') gccosandvers='' ;;
*) gccshortvers=`echo "$gccversion"|sed 's/ .*//'`
   gccosandvers=`$cc -v 2>&1|grep '/specs$'|sed "s!.*/[^-/]*-[^-/]*-\([^-/]*\)/$gccshortvers/specs!\1!"`
   gccshortvers=''
   case "$gccosandvers" in
   $osname) gccosandvers='' ;; # linux gccs seem to have no linux osvers, grr
   $osname$osvers) ;; # looking good
   $osname*) cat <<EOM >&4

*** WHOA THERE!!! ***

    Your gcc has not been compiled for the exact release of
    your operating system ($gccosandvers versus $osname$osvers).

    In general it is a good idea to keep gcc synchronized with
    the operating system because otherwise serious problems
    may ensue when trying to compile software, like Perl.

    I'm trying to be optimistic here, though, and will continue.
    If later during the configuration and build icky compilation
    problems appear (headerfile conflicts being the most common
    manifestation), I suggest reinstalling the gcc to match
    your operating system release.

EOM
      ;;
   *) gccosandvers='' ;; # failed to parse, better be silent
   esac
   ;;
esac
case "$ccname" in
'') ccname="$cc" ;;
esac

: see how we invoke the C preprocessor
echo " "
echo "Now, how can we feed standard input to your C preprocessor..." >&4
cat <<'EOT' >testcpp.c
#define ABC abc
#define XYZ xyz
ABC.XYZ
EOT
cd ..
if test ! -f cppstdin; then
	if test "X$osname" = "Xaix" -a "X$gccversion" = X; then
		# AIX cc -E doesn't show the absolute headerfile
		# locations but we'll cheat by using the -M flag.
		echo 'cat >.$$.c; rm -f .$$.u; '"$cc"' ${1+"$@"} -M -c .$$.c 2>/dev/null; test -s .$$.u && awk '"'"'$2 ~ /\.h$/ { print "# 0 \""$2"\"" }'"'"' .$$.u; rm -f .$$.o .$$.u; '"$cc"' -E ${1+"$@"} .$$.c; rm .$$.c' > cppstdin
	else
		echo 'cat >.$$.c; '"$cc"' -E ${1+"$@"} .$$.c; rm .$$.c' >cppstdin
	fi
else
	echo "Keeping your $hint cppstdin wrapper."
fi
chmod 755 cppstdin
wrapper=`pwd`/cppstdin
ok='false'
cd UU

if $test "X$cppstdin" != "X" && \
	$cppstdin $cppminus <testcpp.c >testcpp.out 2>&1 && \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1
then
	echo "You used to use $cppstdin $cppminus so we'll use that again."
	case "$cpprun" in
	'') echo "But let's see if we can live without a wrapper..." ;;
	*)
		if $cpprun $cpplast <testcpp.c >testcpp.out 2>&1 && \
			$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1
		then
			echo "(And we'll use $cpprun $cpplast to preprocess directly.)"
			ok='true'
		else
			echo "(However, $cpprun $cpplast does not work, let's see...)"
		fi
		;;
	esac
else
	case "$cppstdin" in
	'') ;;
	*)
		echo "Good old $cppstdin $cppminus does not seem to be of any help..."
		;;
	esac
fi

if $ok; then
	: nothing
elif echo 'Maybe "'"$cc"' -E" will work...'; \
	$cc -E <testcpp.c >testcpp.out 2>&1; \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
	echo "Yup, it does."
	x_cpp="$cc -E"
	x_minus='';
elif echo 'Nope...maybe "'"$cc"' -E -" will work...'; \
	$cc -E - <testcpp.c >testcpp.out 2>&1; \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
	echo "Yup, it does."
	x_cpp="$cc -E"
	x_minus='-';
elif echo 'Nope...maybe "'"$cc"' -P" will work...'; \
	$cc -P <testcpp.c >testcpp.out 2>&1; \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
	echo "Yipee, that works!"
	x_cpp="$cc -P"
	x_minus='';
elif echo 'Nope...maybe "'"$cc"' -P -" will work...'; \
	$cc -P - <testcpp.c >testcpp.out 2>&1; \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
	echo "At long last!"
	x_cpp="$cc -P"
	x_minus='-';
elif echo 'No such luck, maybe "'$cpp'" will work...'; \
	$cpp <testcpp.c >testcpp.out 2>&1; \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
	echo "It works!"
	x_cpp="$cpp"
	x_minus='';
elif echo 'Nixed again...maybe "'$cpp' -" will work...'; \
	$cpp - <testcpp.c >testcpp.out 2>&1; \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
	echo "Hooray, it works!  I was beginning to wonder."
	x_cpp="$cpp"
	x_minus='-';
elif echo 'Uh-uh.  Time to get fancy.  Trying a wrapper...'; \
	$wrapper <testcpp.c >testcpp.out 2>&1; \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
	x_cpp="$wrapper"
	x_minus=''
	echo "Eureka!"
else
	dflt=''
	rp="No dice.  I can't find a C preprocessor.  Name one:"
	. ./myread
	x_cpp="$ans"
	x_minus=''
	$x_cpp <testcpp.c >testcpp.out 2>&1
	if $contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
		echo "OK, that will do." >&4
	else
echo "Sorry, I can't get that to work.  Go find one and rerun Configure." >&4
		exit 1
	fi
fi

case "$ok" in
false)
	cppstdin="$x_cpp"
	cppminus="$x_minus"
	cpprun="$x_cpp"
	cpplast="$x_minus"
	set X $x_cpp
	shift
	case "$1" in
	"$cpp")
		echo "Perhaps can we force $cc -E using a wrapper..."
		if $wrapper <testcpp.c >testcpp.out 2>&1; \
			$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1
		then
			echo "Yup, we can."
			cppstdin="$wrapper"
			cppminus='';
		else
			echo "Nope, we'll have to live without it..."
		fi
		;;
	esac
	case "$cpprun" in
	"$wrapper")
		cpprun=''
		cpplast=''
		;;
	esac
	;;
esac

case "$cppstdin" in
"$wrapper"|'cppstdin') ;;
*) $rm -f $wrapper;;
esac
$rm -f testcpp.c testcpp.out

: decide how portable to be.  Allow command line overrides.
case "$d_portable" in
"$undef") ;;
*)	d_portable="$define" ;;
esac

: set up shell script to do ~ expansion
cat >filexp <<EOSS
$startsh
: expand filename
case "\$1" in
 ~/*|~)
	echo \$1 | $sed "s|~|\${HOME-\$LOGDIR}|"
	;;
 ~*)
	if $test -f /bin/csh; then
		/bin/csh -f -c "glob \$1"
		failed=\$?
		echo ""
		exit \$failed
	else
		name=\`$expr x\$1 : '..\([^/]*\)'\`
		dir=\`$sed -n -e "/^\${name}:/{s/^[^:]*:[^:]*:[^:]*:[^:]*:[^:]*:\([^:]*\).*"'\$'"/\1/" -e p -e q -e '}' </etc/passwd\`
		if $test ! -d "\$dir"; then
			me=\`basename \$0\`
			echo "\$me: can't locate home directory for: \$name" >&2
			exit 1
		fi
		case "\$1" in
		*/*)
			echo \$dir/\`$expr x\$1 : '..[^/]*/\(.*\)'\`
			;;
		*)
			echo \$dir
			;;
		esac
	fi
	;;
*)
	echo \$1
	;;
esac
EOSS
chmod +x filexp
$eunicefix filexp

: now set up to get a file name
cat <<EOS >getfile
$startsh
EOS
cat <<'EOSC' >>getfile
tilde=''
fullpath=''
already=''
skip=''
none_ok=''
exp_file=''
nopath_ok=''
orig_rp="$rp"
orig_dflt="$dflt"
case "$gfpth" in
'') gfpth='.' ;;
esac

case "$fn" in
*\(*)
	expr $fn : '.*(\(.*\)).*' | $tr ',' $trnl >getfile.ok
	fn=`echo $fn | sed 's/(.*)//'`
	;;
esac

case "$fn" in
*:*)
	loc_file=`expr $fn : '.*:\(.*\)'`
	fn=`expr $fn : '\(.*\):.*'`
	;;
esac

case "$fn" in
*~*) tilde=true;;
esac
case "$fn" in
*/*) fullpath=true;;
esac
case "$fn" in
*+*) skip=true;;
esac
case "$fn" in
*n*) none_ok=true;;
esac
case "$fn" in
*e*) exp_file=true;;
esac
case "$fn" in
*p*) nopath_ok=true;;
esac

case "$fn" in
*f*) type='File';;
*d*) type='Directory';;
*l*) type='Locate';;
esac

what="$type"
case "$what" in
Locate) what='File';;
esac

case "$exp_file" in
'')
	case "$d_portable" in
	"$define") ;;
	*) exp_file=true;;
	esac
	;;
esac

cd ..
while test "$type"; do
	redo=''
	rp="$orig_rp"
	dflt="$orig_dflt"
	case "$tilde" in
	true) rp="$rp (~name ok)";;
	esac
	. UU/myread
	if test -f UU/getfile.ok && \
		$contains "^$ans\$" UU/getfile.ok >/dev/null 2>&1
	then
		value="$ans"
		ansexp="$ans"
		break
	fi
	case "$ans" in
	none)
		value=''
		ansexp=''
		case "$none_ok" in
		true) type='';;
		esac
		;;
	*)
		case "$tilde" in
		'') value="$ans"
			ansexp="$ans";;
		*)
			value=`UU/filexp $ans`
			case $? in
			0)
				if test "$ans" != "$value"; then
					echo "(That expands to $value on this system.)"
				fi
				;;
			*) value="$ans";;
			esac
			ansexp="$value"
			case "$exp_file" in
			'') value="$ans";;
			esac
			;;
		esac
		case "$fullpath" in
		true)
			case "$ansexp" in
			/*) value="$ansexp" ;;
			[a-zA-Z]:/*) value="$ansexp" ;;
			*)
				redo=true
				case "$already" in
				true)
				echo "I shall only accept a full path name, as in /bin/ls." >&4
				echo "Use a ! shell escape if you wish to check pathnames." >&4
					;;
				*)
				echo "Please give a full path name, starting with slash." >&4
					case "$tilde" in
					true)
				echo "Note that using ~name is ok provided it expands well." >&4
						already=true
						;;
					esac
				esac
				;;
			esac
			;;
		esac
		case "$redo" in
		'')
			case "$type" in
			File)
				for fp in $gfpth; do
					if test "X$fp" = X.; then
					    pf="$ansexp"
					else    
					    pf="$fp/$ansexp"
					fi
					if test -f "$pf"; then
						type=''
					elif test -r "$pf" || (test -h "$pf") >/dev/null 2>&1
					then
						echo "($value is not a plain file, but that's ok.)"
						type=''
					fi
					if test X"$type" = X; then
					    value="$pf"
					    break
					fi
				done
				;;
			Directory)
				for fp in $gfpth; do
					if test "X$fp" = X.; then
					    dir="$ans"
					    direxp="$ansexp"
					else    
					    dir="$fp/$ansexp"
					    direxp="$fp/$ansexp"
					fi
					if test -d "$direxp"; then
						type=''
						value="$dir"
						break
					fi
				done
				;;
			Locate)
				if test -d "$ansexp"; then
					echo "(Looking for $loc_file in directory $value.)"
					value="$value/$loc_file"
					ansexp="$ansexp/$loc_file"
				fi
				if test -f "$ansexp"; then
					type=''
				fi
				case "$nopath_ok" in
				true)	case "$value" in
					*/*) ;;
					*)	echo "Assuming $value will be in people's path."
						type=''
						;;
					esac
					;;
				esac
				;;
			esac

			case "$skip" in
			true) type='';
			esac

			case "$type" in
			'') ;;
			*)
				if test "$fastread" = yes; then
					dflt=y
				else
					dflt=n
				fi
				rp="$what $value doesn't exist.  Use that name anyway?"
				. UU/myread
				dflt=''
				case "$ans" in
				y*) type='';;
				*) echo " ";;
				esac
				;;
			esac
			;;
		esac
		;;
	esac
done
cd UU
ans="$value"
rp="$orig_rp"
dflt="$orig_dflt"
rm -f getfile.ok
test "X$gfpthkeep" != Xy && gfpth=""
EOSC

: What should the include directory be ?
echo " "
$echo $n "Hmm...  $c"
dflt='/usr/include'
incpath=''
mips_type=''
if $test -f /bin/mips && /bin/mips; then
	echo "Looks like a MIPS system..."
	$cat >usr.c <<'EOCP'
#ifdef SYSTYPE_BSD43
/bsd43
#endif
EOCP
	if cc -E usr.c > usr.out && $contains / usr.out >/dev/null 2>&1; then
		dflt='/bsd43/usr/include'
		incpath='/bsd43'
		mips_type='BSD 4.3'
	else
		mips_type='System V'
	fi
	$rm -f usr.c usr.out
	echo "and you're compiling with the $mips_type compiler and libraries."
	xxx_prompt=y
	echo "exit 0" >mips
else
	echo "Doesn't look like a MIPS system."
	xxx_prompt=n
	echo "exit 1" >mips
fi
chmod +x mips
$eunicefix mips
case "$usrinc" in
'') ;;
*) dflt="$usrinc";;
esac
case "$xxx_prompt" in
y)	fn=d/
	echo " "
	rp='Where are the include files you want to use?'
	. ./getfile
	usrinc="$ans"
	;;
*)	usrinc="$dflt"
	;;
esac

: Set private lib path
case "$plibpth" in
'') if ./mips; then
		plibpth="$incpath/usr/lib /usr/local/lib /usr/ccs/lib"
	fi;;
esac
case "$libpth" in
' ') dlist='';;
'') dlist="$loclibpth $plibpth $glibpth";;
*) dlist="$libpth";;
esac

: Now check and see which directories actually exist, avoiding duplicates
libpth=''
for xxx in $dlist
do
    if $test -d $xxx; then
		case " $libpth " in
		*" $xxx "*) ;;
		*) libpth="$libpth $xxx";;
		esac
    fi
done
$cat <<'EOM'

Some systems have incompatible or broken versions of libraries.  Among
the directories listed in the question below, please remove any you
know not to be holding relevant libraries, and add any that are needed.
Say "none" for none.

EOM
case "$libpth" in
'') dflt='none';;
*)
	set X $libpth
	shift
	dflt=${1+"$@"}
	;;
esac
rp="Directories to use for library searches?"
. ./myread
case "$ans" in
none) libpth=' ';;
*) libpth="$ans";;
esac

: compute shared library extension
case "$so" in
'')
	if xxx=`./loc libc.sl X $libpth`; $test -f "$xxx"; then
		dflt='sl'
	else
		dflt='so'
	fi
	;;
*) dflt="$so";;
esac
$cat <<EOM

On some systems, shared libraries may be available.  Answer 'none' if
you want to suppress searching of shared libraries for the remainder
of this configuration.

EOM
rp='What is the file extension used for shared libraries?'
. ./myread
so="$ans"

: Define several unixisms.
: Hints files or command line option can be used to override them.
: The convoluted testing is in case hints files set either the old
: or the new name.
case "$_exe" in
'')	case "$exe_ext" in
    '')	;;
	*)	_exe="$exe_ext" ;;
	esac
	;;
esac
case "$_a" in
'')	case "$lib_ext" in
    '')	_a='.a';;
	*)	_a="$lib_ext" ;;
	esac
	;;
esac
case "$_o" in
'') case "$obj_ext" in
	'')	_o='.o';;
	*)	_o="$obj_ext";;
	esac
	;;
esac
case "$p_" in
'') case "$path_sep" in
	'')	p_=':';;
	*)	p_="$path_sep";;
	esac
	;;
esac
exe_ext=$_exe
lib_ext=$_a
obj_ext=$_o
path_sep=$p_

: Which makefile gets called first.  This is used by make depend.
case "$firstmakefile" in
'') firstmakefile='makefile';;
esac

case "$usesocks" in
$define|true|[yY]*)	dflt='y';;
*) dflt='n';;
esac
cat <<EOM

Perl can be built to use the SOCKS proxy protocol library.  To do so,
Configure must be run with -Dusesocks.

If this doesn't make any sense to you, just accept the default '$dflt'.
EOM
rp='Build Perl for SOCKS?'
. ./myread
case "$ans" in
y|Y)	val="$define" ;;     
*)      val="$undef" ;;
esac
set usesocks
eval $setvar

: Looking for optional libraries
echo " "
echo "Checking for optional libraries..." >&4
case "$libs" in
' '|'') dflt='';;
*) dflt="$libs";;
esac
case "$libswanted" in
'') libswanted='c_s';;
esac
case "$usesocks" in
"$define") libswanted="$libswanted socks5 socks5_sh" ;;
esac
libsfound=''
libsfiles=''
libsdirs=''
libspath=''
for thisdir in $libpth $xlibpth; do
  test -d $thisdir && libspath="$libspath $thisdir"
done
for thislib in $libswanted; do
	for thisdir in $libspath; do
	    xxx=''
	    if $test ! -f "$xxx" -a "X$ignore_versioned_solibs" = "X"; then
		xxx=`ls $thisdir/lib$thislib.$so.[0-9] 2>/dev/null|tail -1`
	        $test -f "$xxx" && eval $libscheck
		$test -f "$xxx" && libstyle=shared
	    fi
	    if test ! -f "$xxx"; then
		xxx=$thisdir/lib$thislib.$so
	        $test -f "$xxx" && eval $libscheck
		$test -f "$xxx" && libstyle=shared
	    fi	
	    if test ! -f "$xxx"; then
		xxx=$thisdir/lib$thislib$_a
	        $test -f "$xxx" && eval $libscheck
		$test -f "$xxx" && libstyle=static
	    fi
	    if test ! -f "$xxx"; then
		xxx=$thisdir/$thislib$_a
	        $test -f "$xxx" && eval $libscheck
		$test -f "$xxx" && libstyle=static
	    fi
	    if test ! -f "$xxx"; then
		xxx=$thisdir/lib${thislib}_s$_a
	        $test -f "$xxx" && eval $libscheck
		$test -f "$xxx" && libstyle=static
		$test -f "$xxx" && thislib=${thislib}_s
	    fi
	    if test ! -f "$xxx"; then
		xxx=$thisdir/Slib$thislib$_a
	        $test -f "$xxx" && eval $libscheck
		$test -f "$xxx" && libstyle=static
	    fi
	    if $test -f "$xxx"; then
		case "$libstyle" in
		shared) echo "Found -l$thislib (shared)." ;;
		static) echo "Found -l$thislib." ;;
		*)      echo "Found -l$thislib ($libstyle)." ;;
		esac
		case " $dflt " in
		*"-l$thislib "*);;
		*) dflt="$dflt -l$thislib"
                   libsfound="$libsfound $xxx"
                   yyy=`basename $xxx`
                   libsfiles="$libsfiles $yyy"
                   yyy=`echo $xxx|$sed -e "s%/$yyy\\$%%"`
                   case " $libsdirs " in
                   *" $yyy "*) ;;
                   *) libsdirs="$libsdirs $yyy" ;;
                   esac
		   ;;
		esac
		break
	    fi	
	done
	if $test ! -f "$xxx"; then
	    echo "No -l$thislib."
	fi
done
set X $dflt
shift
dflt="$*"
case "$libs" in
'') dflt="$dflt";;
*) dflt="$libs";;
esac
case "$dflt" in
' '|'') dflt='none';;
esac

$cat <<EOM

In order to compile $package on your machine, a number of libraries
are usually needed.  Include any other special libraries here as well.
Say "none" for none.  The default list is almost always right.
EOM

echo " "
rp="What libraries to use?"
. ./myread
case "$ans" in
none) libs=' ';;
*) libs="$ans";;
esac

: determine optimization, if desired, or use for debug flag also
case "$optimize" in
' '|$undef) dflt='none';;
'') dflt='-O';;
*) dflt="$optimize";;
esac
$cat <<EOH

By default, $package compiles with the -O flag to use the optimizer.
Alternately, you might want to use the symbolic debugger, which uses
the -g flag (on traditional Unix systems).  Either flag can be
specified here.  To use neither flag, specify the word "none".

EOH
rp="What optimizer/debugger flag should be used?"
. ./myread
optimize="$ans"
case "$optimize" in
'none') optimize=" ";;
esac

dflt=''
: We will not override a previous value, but we might want to
: augment a hint file
case "$hint" in
default|recommended)
	case "$gccversion" in
	1*) dflt='-fpcc-struct-return' ;;
	esac
	case "$optimize" in
	*-g*) dflt="$dflt -DDEBUGGING";;
	esac
	case "$gccversion" in
	2*) if test -d /etc/conf/kconfig.d &&
			$contains _POSIX_VERSION $usrinc/sys/unistd.h >/dev/null 2>&1
		then
			dflt="$dflt -posix"
		fi
		;;
	esac
	case "$gccversion" in
	1*) ;;
	2.[0-8]*) ;;
	?*) 	echo " "
		echo "Checking if your compiler accepts -fno-strict-aliasing" 2>&1
		echo 'int main(void) { return 0; }' > gcctest.c
		if $cc -O2 -fno-strict-aliasing -o gcctest gcctest.c; then
			echo "Yes, it does." 2>&1
			case "$ccflags" in
			*strict-aliasing*) 
				echo "Leaving current flags $ccflags alone." 2>&1
				;;
			*) dflt="$dflt -fno-strict-aliasing" ;;
			esac
		else
			echo "Nope, it doesn't, but that's ok." 2>&1
		fi
		;;
	esac
	;;
esac

case "$mips_type" in
*BSD*|'') inclwanted="$locincpth $usrinc";;
*) inclwanted="$locincpth $inclwanted $usrinc/bsd";;
esac
for thisincl in $inclwanted; do
	if $test -d $thisincl; then
		if $test x$thisincl != x$usrinc; then
			case "$dflt" in
                        *" -I$thisincl "*);;
                        *) dflt="$dflt -I$thisincl ";;
			esac
		fi
	fi
done

inctest='if $contains $2 $usrinc/$1 >/dev/null 2>&1; then
	xxx=true;
elif $contains $2 $usrinc/sys/$1 >/dev/null 2>&1; then
	xxx=true;
else
	xxx=false;
fi;
if $xxx; then
	case "$dflt" in
	*$2*);;
	*) dflt="$dflt -D$2";;
	esac;
fi'

set signal.h LANGUAGE_C; eval $inctest

case "$usesocks" in
$define)
	ccflags="$ccflags -DSOCKS"
	;;
esac

case "$hint" in
default|recommended) dflt="$ccflags $dflt" ;;
*) dflt="$ccflags";;
esac

case "$dflt" in
''|' ') dflt=none;;
esac

$cat <<EOH

Your C compiler may want other flags.  For this question you should include
-I/whatever and -DWHATEVER flags and any other flags used by the C compiler,
but you should NOT include libraries or ld flags like -lwhatever.  If you
want $package to honor its debug switch, you should include -DDEBUGGING here.
Your C compiler might also need additional flags, such as -D_POSIX_SOURCE.

To use no flags, specify the word "none".

EOH
set X $dflt
shift
dflt=${1+"$@"}
rp="Any additional cc flags?"
. ./myread
case "$ans" in
none) ccflags='';;
*) ccflags="$ans";;
esac

: the following weeds options from ccflags that are of no interest to cpp
cppflags="$ccflags"
case "$gccversion" in
1*) cppflags="$cppflags -D__GNUC__"
esac
case "$mips_type" in
'');;
*BSD*) cppflags="$cppflags -DSYSTYPE_BSD43";;
esac
case "$cppflags" in
'');;
*)
	echo " "
	echo "Let me guess what the preprocessor flags are..." >&4
	set X $cppflags
	shift
	cppflags=''
	$cat >cpp.c <<'EOM'
#define BLURFL foo

BLURFL xx LFRULB
EOM
	previous=''
	for flag in $*
	do
		case "$flag" in
		-*) ftry="$flag";;
		*) ftry="$previous $flag";;
		esac
		if $cppstdin -DLFRULB=bar $cppflags $ftry $cppminus <cpp.c \
			>cpp1.out 2>/dev/null && \
			$cpprun -DLFRULB=bar $cppflags $ftry $cpplast <cpp.c \
			>cpp2.out 2>/dev/null && \
			$contains 'foo.*xx.*bar' cpp1.out >/dev/null 2>&1 && \
			$contains 'foo.*xx.*bar' cpp2.out >/dev/null 2>&1
		then
			cppflags="$cppflags $ftry"
			previous=''
		else
			previous="$flag"
		fi
	done
	set X $cppflags
	shift
	cppflags=${1+"$@"}
	case "$cppflags" in
	*-*)  echo "They appear to be: $cppflags";;
	esac
	$rm -f cpp.c cpp?.out
	;;
esac

: flags used in final linking phase
case "$ldflags" in
'') if ./venix; then
		dflt='-i -z'
	else
		dflt=''
	fi
	case "$ccflags" in
	*-posix*) dflt="$dflt -posix" ;;
	esac
	;;
*) dflt="$ldflags";;
esac

: Try to guess additional flags to pick up local libraries.
for thislibdir in $libpth; do
	case " $loclibpth " in
	*" $thislibdir "*)
		case "$dflt " in 
		*"-L$thislibdir "*) ;;
		*)  dflt="$dflt -L$thislibdir" ;;
		esac
		;;
	esac
done

case "$dflt" in
'') dflt='none' ;;
esac

$cat <<EOH

Your C linker may need flags.  For this question you should
include -L/whatever and any other flags used by the C linker, but you
should NOT include libraries like -lwhatever.

Make sure you include the appropriate -L/path flags if your C linker
does not normally search all of the directories you specified above,
namely
	$libpth
To use no flags, specify the word "none".

EOH

rp="Any additional ld flags (NOT including libraries)?"
. ./myread
case "$ans" in
none) ldflags='';;
*) ldflags="$ans";;
esac
rmlist="$rmlist pdp11"

: coherency check
echo " "
echo "Checking your choice of C compiler and flags for coherency..." >&4
$cat > try.c <<'EOF'
#include <stdio.h>
int main() { printf("Ok\n"); exit(0); }
EOF
set X $cc -o try $optimize $ccflags $ldflags try.c $libs
shift
$cat >try.msg <<'EOM'
I've tried to compile and run the following simple program:

EOM
$cat try.c >> try.msg

$cat >> try.msg <<EOM

I used the command:

	$*
	./try

and I got the following output:

EOM
dflt=y
if sh -c "$cc -o try $optimize $ccflags $ldflags try.c $libs" >>try.msg 2>&1; then
	if sh -c './try' >>try.msg 2>&1; then
		xxx=`./try`
		case "$xxx" in
		"Ok") dflt=n ;;
		*)	echo 'The program compiled OK, but produced no output.' >> try.msg
			case " $libs " in
			*" -lsfio "*)
				cat >> try.msg <<'EOQS'
If $libs contains -lsfio, and sfio is mis-configured, then it
sometimes (apparently) runs and exits with a 0 status, but with no
output!  It may have to do with sfio's use of _exit vs. exit.

EOQS
				rp="You have a big problem.  Shall I abort Configure"
				dflt=y
				;;
			esac
			;;
		esac
	else
		echo "The program compiled OK, but exited with status $?." >>try.msg
		rp="You have a problem.  Shall I abort Configure"
		dflt=y
	fi
else
	echo "I can't compile the test program." >>try.msg
	rp="You have a BIG problem.  Shall I abort Configure"
	dflt=y
fi
case "$dflt" in
y)
	$cat try.msg >&4
	case "$knowitall" in
	'')
		echo "(The supplied flags or libraries might be incorrect.)"
		;;
	*) dflt=n;;
	esac
	echo " "
	. ./myread
	case "$ans" in
	n*|N*) ;;
	*)	echo "Ok.  Stopping Configure." >&4
		exit 1
		;;
	esac
	;;
n) echo "OK, that should do.";;
esac
$rm -f try try.* core

: define an is-a-typedef? function
typedef='type=$1; var=$2; def=$3; shift; shift; shift; inclist=$@;
case "$inclist" in
"") inclist="sys/types.h";;
esac;
eval "varval=\$$var";
case "$varval" in
"")
	$rm -f temp.c;
	for inc in $inclist; do
		echo "#include <$inc>" >>temp.c;
	done;
	echo "#ifdef $type" >> temp.c;
	echo "printf(\"We have $type\");" >> temp.c;
	echo "#endif" >> temp.c;
	$cppstdin $cppflags $cppminus < temp.c >temp.E 2>/dev/null;
	if $contains $type temp.E >/dev/null 2>&1; then
		eval "$var=\$type";
	else
		eval "$var=\$def";
	fi;
	$rm -f temp.?;;
*) eval "$var=\$varval";;
esac'

: define an is-a-typedef? function that prompts if the type is not available.
typedef_ask='type=$1; var=$2; def=$3; shift; shift; shift; inclist=$@;
case "$inclist" in
"") inclist="sys/types.h";;
esac;
eval "varval=\$$var";
case "$varval" in
"")
	$rm -f temp.c;
	for inc in $inclist; do
		echo "#include <$inc>" >>temp.c;
	done;
	echo "#ifdef $type" >> temp.c;
	echo "printf(\"We have $type\");" >> temp.c;
	echo "#endif" >> temp.c;
	$cppstdin $cppflags $cppminus < temp.c >temp.E 2>/dev/null;
	echo " " ;
	echo "$rp" | $sed -e "s/What is/Looking for/" -e "s/?/./";
	if $contains $type temp.E >/dev/null 2>&1; then
		echo "$type found." >&4;
		eval "$var=\$type";
	else
		echo "$type NOT found." >&4;
		dflt="$def";
		. ./myread ;
		eval "$var=\$ans";
	fi;
	$rm -f temp.?;;
*) eval "$var=\$varval";;
esac'

: define a shorthand compile call
compile='
mc_file=$1;
shift;
$cc -o ${mc_file} $optimize $ccflags $ldflags $* ${mc_file}.c $libs > /dev/null 2>&1;'
: define a shorthand compile call for compilations that should be ok.
compile_ok='
mc_file=$1;
shift;
$cc -o ${mc_file} $optimize $ccflags $ldflags $* ${mc_file}.c $libs;'

: check for lengths of integral types
echo " "
case "$intsize" in
'')
	echo "Checking to see how big your integers are..." >&4
	$cat >intsize.c <<'EOCP'
#include <stdio.h>
int main()
{
	printf("intsize=%d;\n", (int)sizeof(int));
	printf("longsize=%d;\n", (int)sizeof(long));
	printf("shortsize=%d;\n", (int)sizeof(short));
	exit(0);
}
EOCP
	set intsize
	if eval $compile_ok && ./intsize > /dev/null; then
		eval `./intsize`
		echo "Your integers are $intsize bytes long."
		echo "Your long integers are $longsize bytes long."
		echo "Your short integers are $shortsize bytes long."
	else
		$cat >&4 <<EOM
!
Help! I can't compile and run the intsize test program: please enlighten me!
(This is probably a misconfiguration in your system or libraries, and
you really ought to fix it.  Still, I'll try anyway.)
!
EOM
		dflt=4
		rp="What is the size of an integer (in bytes)?"
		. ./myread
		intsize="$ans"
		dflt=$intsize
		rp="What is the size of a long integer (in bytes)?"
		. ./myread
		longsize="$ans"
		dflt=2
		rp="What is the size of a short integer (in bytes)?"
		. ./myread
		shortsize="$ans"
	fi
	;;
esac
$rm -f intsize intsize.*

: see what type lseek is declared as in the kernel
rp="What is the type used for lseek's offset on this system?"
set off_t lseektype long stdio.h sys/types.h
eval $typedef_ask

echo " "
echo "Checking to see how big your file offsets are..." >&4
$cat >try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
int main()
{
    printf("%d\n", (int)sizeof($lseektype));
    return(0); 
}
EOCP
set try
if eval $compile_ok; then
	lseeksize=`./try`
	echo "Your file offsets are $lseeksize bytes long."
else
	dflt=$longsize
	echo " "
	echo "(I can't seem to compile the test program.  Guessing...)"
	rp="What is the size of your file offsets (in bytes)?"
	. ./myread
	lseeksize="$ans"
fi
$rm -f try.c try

: see what type file positions are declared as in the library
rp="What is the type for file position used by fsetpos()?"
set fpos_t fpostype long stdio.h sys/types.h
eval $typedef_ask

echo " "
case "$fpostype" in
*_t) zzz="$fpostype"	;;
*)   zzz="fpos_t"	;;
esac
echo "Checking the size of $zzz..." >&4 
cat > try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
int main() {
    printf("%d\n", (int)sizeof($fpostype));
    exit(0);
}
EOCP
set try
if eval $compile_ok; then
	yyy=`./try`
	case "$yyy" in
	'')	fpossize=4
		echo "(I can't execute the test program--guessing $fpossize.)" >&4
		;;
	*)	fpossize=$yyy
		echo "Your $zzz is $fpossize bytes long."
		;;
	esac
else
	dflt="$longsize"
	echo " " >&4
	echo "(I can't compile the test program.  Guessing...)" >&4
	rp="What is the size of your file positions (in bytes)?"
	. ./myread
	fpossize="$ans"
fi



# Backward compatibility (uselfs is deprecated).
case "$uselfs" in
"$define"|true|[yY]*)
	cat <<EOM >&4

*** Configure -Duselfs is deprecated, using -Duselargefiles instead.
EOM
	uselargefiles="$define"
	;;
esac                          

case "$lseeksize:$fpossize" in
8:8) cat <<EOM

You can have files larger than 2 gigabytes.
EOM
   val="$define" ;;
*)    case "$uselargefiles" in
   "$undef"|false|[nN]*) dflt='n' ;;
   *)	dflt='y' ;;
   esac
   cat <<EOM

Perl can be built to understand large files (files larger than 2 gigabytes)
on some systems.  To do so, Configure can be run with -Duselargefiles.

If this doesn't make any sense to you, just accept the default '$dflt'.
EOM
   rp='Try to understand large files, if available?'
   . ./myread
   case "$ans" in
   y|Y) 	val="$define" ;;
   *)   	val="$undef"  ;;
   esac
   ;;
esac
set uselargefiles
eval $setvar
case "$uselargefiles" in
"$define")
: Look for a hint-file generated 'call-back-unit'.  If the
: user has specified that a large files perl is to be built,
: we may need to set or change some other defaults.
	if $test -f uselargefiles.cbu; then
		echo "Your platform has some specific hints for large file builds, using them..."
		. ./uselargefiles.cbu
		echo " "
		echo "Rechecking to see how big your file offsets are..." >&4
		$cat >try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
int main()
{
    printf("%d\n", (int)sizeof($lseektype));
    return(0); 
}
EOCP
		set try
		if eval $compile_ok; then
			lseeksize=`./try`
			$echo "Your file offsets are now $lseeksize bytes long."
		else
			dflt="$lseeksize"
			echo " "
			echo "(I can't seem to compile the test program.  Guessing...)"
			rp="What is the size of your file offsets (in bytes)?"
			. ./myread
			lseeksize="$ans"
		fi
		case "$fpostype" in
		*_t) zzz="$fpostype"	;;
		*)   zzz="fpos_t"	;;
		esac
		$echo $n "Rechecking the size of $zzz...$c" >&4 
		$cat > try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
int main() {
    printf("%d\n", (int)sizeof($fpostype));
    exit(0);
}
EOCP
		set try
		if eval $compile_ok; then
			yyy=`./try`
			dflt="$lseeksize"
			case "$yyy" in
			'')	echo " "
				echo "(I can't execute the test program--guessing $fpossize.)" >&4
				;;
			*)	fpossize=$yyy
				echo " $fpossize bytes." >&4
				;;
			esac
		else
			dflt="$fpossize"
			echo " "
			echo "(I can't compile the test program.  Guessing...)" >&4
			rp="What is the size of your file positions (in bytes)?"
			. ./myread
			fpossize="$ans"
		fi
		$rm -f try.c try
	fi
	;;
esac


case "$usemorebits" in
"$define"|true|[yY]*)
	use64bitint="$define"
	uselongdouble="$define"
	usemorebits="$define"
	;;
*)	usemorebits="$undef"
	;;
esac


case "$uselonglong" in
"$define"|true|[yY]*)
	cat <<EOM >&4

*** Configure -Duselonglong is deprecated, using -Duse64bitint instead.
EOM
	use64bitint="$define"
	;;
esac                          
case "$use64bits" in
"$define"|true|[yY]*)
	cat <<EOM >&4

*** Configure -Duse64bits is deprecated, using -Duse64bitint instead.
EOM
	use64bitint="$define"
	;;
esac                          
case "$use64bitints" in
"$define"|true|[yY]*)
	cat <<EOM >&4

*** There is no Configure -Duse64bitints, using -Duse64bitint instead.
EOM
	use64bitint="$define"
	;;
esac                          
case "$use64bitsint" in
"$define"|true|[yY]*)
	cat <<EOM >&4

*** There is no Configure -Duse64bitsint, using -Duse64bitint instead.
EOM
	use64bitint="$define"
	;;
esac                          
case "$uselonglongs" in
"$define"|true|[yY]*)
	cat <<EOM >&4

*** There is no Configure -Duselonglongs, using -Duse64bitint instead.
EOM
	use64bitint="$define"
	;;
esac                          
case "$use64bitsall" in
"$define"|true|[yY]*)
	cat <<EOM >&4

*** There is no Configure -Duse64bitsall, using -Duse64bitall instead.
EOM
	use64bitall="$define"
	;;
esac                          

case "$ccflags" in
*-DUSE_LONG_LONG*|*-DUSE_64_BIT_INT*|*-DUSE_64_BIT_ALL*) use64bitint="$define";;
esac
case "$use64bitall" in
"$define"|true|[yY]*) use64bitint="$define" ;;
esac

case "$longsize" in
8) cat <<EOM

You have natively 64-bit long integers.
EOM
   val="$define"
   ;;
*) case "$use64bitint" in
   "$define"|true|[yY]*) dflt='y';;
   *) dflt='n';;
   esac
   cat <<EOM

Perl can be built to take advantage of 64-bit integer types
on some systems.  To do so, Configure can be run with -Duse64bitint.
Choosing this option will most probably introduce binary incompatibilities.

If this doesn't make any sense to you, just accept the default '$dflt'.
EOM
   rp='Try to use 64-bit integers, if available?'
   . ./myread
   case "$ans" in
   [yY]*) val="$define" ;;
   *)     val="$undef"  ;;
   esac
   ;;
esac
set use64bitint
eval $setvar

case "$use64bitall" in
"$define"|true|[yY]*) dflt='y' ;;
*) case "$longsize" in
   8) dflt='y' ;;
   *) dflt='n' ;;
   esac
   ;;
esac	
cat <<EOM

You may also choose to try maximal 64-bitness.  It means using as much
64-bitness as possible on the platform.  This in turn means even more
binary incompatibilities.  On the other hand, your platform may not
have any more 64-bitness available than what you already have chosen.

If this doesn't make any sense to you, just accept the default '$dflt'.
EOM
rp='Try to use maximal 64-bit support, if available?'
. ./myread
case "$ans" in
[yY]*) val="$define" ;;
*)     val="$undef"  ;;
esac
set use64bitall
eval $setvar
case "$use64bitall" in
"$define")
	case "$use64bitint" in
	"$undef")
		cat <<EOM

Since you have chosen a maximally 64-bit build, I'm also turning on
the use of 64-bit integers.
EOM
		use64bitint="$define" ;;
	esac
	;;
esac

case "$use64bitint" in
"$define"|true|[yY]*)
: Look for a hint-file generated 'call-back-unit'.  If the
: user has specified that a 64-bit perl is to be built,
: we may need to set or change some other defaults.
	if $test -f use64bitint.cbu; then
		echo "Your platform has some specific hints for 64-bit integers, using them..."
		. ./use64bitint.cbu
	fi
	case "$longsize" in
	4) case "$archname64" in
	   '') archname64=64int ;;
	   esac
	   ;;
	esac
	;;
esac

case "$use64bitall" in
"$define"|true|[yY]*)
: Look for a hint-file generated 'call-back-unit'.  If the
: user has specified that a maximally 64-bit perl is to be built,
: we may need to set or change some other defaults.
	if $test -f use64bitall.cbu; then
		echo "Your platform has some specific hints for 64-bit builds, using them..."
		. ./use64bitall.cbu
	fi
	case "$longsize" in
	4) case "$archname64" in
	   ''|64int) archname64=64all ;;
	   esac
	   ;;
	esac
	;;
esac

echo " "
echo "Checking for GNU C Library..." >&4
cat >gnulibc.c <<EOM
#include <stdio.h>
int main()
{
#ifdef __GLIBC__
    exit(0);
#else
    exit(1);
#endif
}
EOM
set gnulibc
if eval $compile_ok && ./gnulibc; then
	val="$define"
	echo "You are using the GNU C Library"
else
	val="$undef"
	echo "You are not using the GNU C Library"
fi
$rm -f gnulibc*
set d_gnulibc
eval $setvar

: see if nm is to be used to determine whether a symbol is defined or not
case "$usenm" in
'')
	dflt=''
	case "$d_gnulibc" in
	"$define")
		echo " "
		echo "nm probably won't work on the GNU C Library." >&4
		dflt=n
		;;
	esac
	case "$dflt" in
	'') 
		if $test "$osname" = aix -a ! -f /lib/syscalls.exp; then
			echo " "
			echo "Whoops!  This is an AIX system without /lib/syscalls.exp!" >&4
			echo "'nm' won't be sufficient on this sytem." >&4
			dflt=n
		fi
		;;
	esac
	case "$dflt" in
	'') dflt=`$egrep 'inlibc|csym' $rsrc/Configure | wc -l 2>/dev/null`
		if $test $dflt -gt 20; then
			dflt=y
		else
			dflt=n
		fi
		;;
	esac
	;;
*)
	case "$usenm" in
	true|$define) dflt=y;;
	*) dflt=n;;
	esac
	;;
esac
$cat <<EOM

I can use $nm to extract the symbols from your C libraries. This
is a time consuming task which may generate huge output on the disk (up
to 3 megabytes) but that should make the symbols extraction faster. The
alternative is to skip the 'nm' extraction part and to compile a small
test program instead to determine whether each symbol is present. If
you have a fast C compiler and/or if your 'nm' output cannot be parsed,
this may be the best solution.

You probably shouldn't let me use 'nm' if you are using the GNU C Library.

EOM
rp="Shall I use $nm to extract C symbols from the libraries?"
. ./myread
case "$ans" in
[Nn]*) usenm=false;;
*) usenm=true;;
esac

runnm=$usenm
case "$reuseval" in
true) runnm=false;;
esac

: nm options which may be necessary
case "$nm_opt" in
'') if $test -f /mach_boot; then
		nm_opt=''	# Mach
	elif $test -d /usr/ccs/lib; then
		nm_opt='-p'	# Solaris (and SunOS?)
	elif $test -f /dgux; then
		nm_opt='-p'	# DG-UX
	elif $test -f /lib64/rld; then
		nm_opt='-p'	# 64-bit Irix
	else
		nm_opt=''
	fi;;
esac

: nm options which may be necessary for shared libraries but illegal
: for archive libraries.  Thank you, Linux.
case "$nm_so_opt" in
'')	case "$myuname" in
	*linux*)
		if $nm --help | $grep 'dynamic' > /dev/null 2>&1; then
			nm_so_opt='--dynamic'
		fi
		;;
	esac
	;;
esac

case "$runnm" in
true)
: get list of predefined functions in a handy place
echo " "
case "$libc" in
'') libc=unknown
	case "$libs" in
	*-lc_s*) libc=`./loc libc_s$_a $libc $libpth`
	esac
	;;
esac
libnames='';
case "$libs" in
'') ;;
*)  for thislib in $libs; do
	case "$thislib" in
	-lc|-lc_s)
		: Handle C library specially below.
		;;
	-l*)
		thislib=`echo $thislib | $sed -e 's/^-l//'`
		if try=`./loc lib$thislib.$so.'*' X $libpth`; $test -f "$try"; then
			:
		elif try=`./loc lib$thislib.$so X $libpth`; $test -f "$try"; then
			:
		elif try=`./loc lib$thislib$_a X $libpth`; $test -f "$try"; then
			:
		elif try=`./loc $thislib$_a X $libpth`; $test -f "$try"; then
			:
		elif try=`./loc lib$thislib X $libpth`; $test -f "$try"; then
			:
		elif try=`./loc $thislib X $libpth`; $test -f "$try"; then
			:
		elif try=`./loc Slib$thislib$_a X $xlibpth`; $test -f "$try"; then
			:
		else
			try=''
		fi
		libnames="$libnames $try"
		;;
	*) libnames="$libnames $thislib" ;;
	esac
	done
	;;
esac
xxx=normal
case "$libc" in
unknown)
	set /lib/libc.$so
	for xxx in $libpth; do
		$test -r $1 || set $xxx/libc.$so
		: The messy sed command sorts on library version numbers.
		$test -r $1 || \
			set `echo blurfl; echo $xxx/libc.$so.[0-9]* | \
			tr ' ' $trnl | egrep -v '\.[A-Za-z]*$' | $sed -e '
				h
				s/[0-9][0-9]*/0000&/g
				s/0*\([0-9][0-9][0-9][0-9][0-9]\)/\1/g
				G
				s/\n/ /' | \
			 $sort | $sed -e 's/^.* //'`
		eval set \$$#
	done
	$test -r $1 || set /usr/ccs/lib/libc.$so
	$test -r $1 || set /lib/libsys_s$_a
	;;
*)
	set blurfl
	;;
esac
if $test -r "$1"; then
	echo "Your (shared) C library seems to be in $1."
	libc="$1"
elif $test -r /lib/libc && $test -r /lib/clib; then
	echo "Your C library seems to be in both /lib/clib and /lib/libc."
	xxx=apollo
	libc='/lib/clib /lib/libc'
	if $test -r /lib/syslib; then
		echo "(Your math library is in /lib/syslib.)"
		libc="$libc /lib/syslib"
	fi
elif $test -r "$libc" || (test -h "$libc") >/dev/null 2>&1; then
	echo "Your C library seems to be in $libc, as you said before."
elif $test -r $incpath/usr/lib/libc$_a; then
	libc=$incpath/usr/lib/libc$_a;
	echo "Your C library seems to be in $libc.  That's fine."
elif $test -r /lib/libc$_a; then
	libc=/lib/libc$_a;
	echo "Your C library seems to be in $libc.  You're normal."
else
	if tans=`./loc libc$_a blurfl/dyick $libpth`; $test -r "$tans"; then
		:
	elif tans=`./loc libc blurfl/dyick $libpth`; $test -r "$tans"; then
		libnames="$libnames "`./loc clib blurfl/dyick $libpth`
	elif tans=`./loc clib blurfl/dyick $libpth`; $test -r "$tans"; then
		:
	elif tans=`./loc Slibc$_a blurfl/dyick $xlibpth`; $test -r "$tans"; then
		:
	elif tans=`./loc Mlibc$_a blurfl/dyick $xlibpth`; $test -r "$tans"; then
		:
	else
		tans=`./loc Llibc$_a blurfl/dyick $xlibpth`
	fi
	if $test -r "$tans"; then
		echo "Your C library seems to be in $tans, of all places."
		libc=$tans
	else
		libc='blurfl'
	fi
fi
if $test $xxx = apollo -o -r "$libc" || (test -h "$libc") >/dev/null 2>&1; then
	dflt="$libc"
	cat <<EOM

If the guess above is wrong (which it might be if you're using a strange
compiler, or your machine supports multiple models), you can override it here.

EOM
else
	dflt=''
	echo $libpth | $tr ' ' $trnl | $sort | $uniq > libpath
	cat >&4 <<EOM
I can't seem to find your C library.  I've looked in the following places:

EOM
	$sed 's/^/	/' libpath
	cat <<EOM

None of these seems to contain your C library. I need to get its name...

EOM
fi
fn=f
rp='Where is your C library?'
. ./getfile
libc="$ans"

echo " "
echo $libc $libnames | $tr ' ' $trnl | $sort | $uniq > libnames
set X `cat libnames`
shift
xxx=files
case $# in 1) xxx=file; esac
echo "Extracting names from the following $xxx for later perusal:" >&4
echo " "
$sed 's/^/	/' libnames >&4
echo " "
$echo $n "This may take a while...$c" >&4

for file in $*; do
	case $file in
	*$so*) $nm $nm_so_opt $nm_opt $file 2>/dev/null;;
	*) $nm $nm_opt $file 2>/dev/null;;
	esac
done >libc.tmp

$echo $n ".$c"
$grep fprintf libc.tmp > libc.ptf
xscan='eval "<libc.ptf $com >libc.list"; $echo $n ".$c" >&4'
xrun='eval "<libc.tmp $com >libc.list"; echo "done" >&4'
xxx='[ADTSIW]'
if com="$sed -n -e 's/__IO//' -e 's/^.* $xxx  *_[_.]*//p' -e 's/^.* $xxx  *//p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$sed -n -e 's/^__*//' -e 's/^\([a-zA-Z_0-9$]*\).*xtern.*/\1/p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$sed -n -e '/|UNDEF/d' -e '/FUNC..GL/s/^.*|__*//p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$sed -n -e 's/^.* D __*//p' -e 's/^.* D //p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$sed -n -e 's/^_//' -e 's/^\([a-zA-Z_0-9]*\).*xtern.*text.*/\1/p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$sed -n -e 's/^.*|FUNC |GLOB .*|//p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$grep '|' | $sed -n -e '/|COMMON/d' -e '/|DATA/d' \
				-e '/ file/d' -e 's/^\([^ 	]*\).*/\1/p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$sed -n -e 's/^.*|FUNC |GLOB .*|//p' -e 's/^.*|FUNC |WEAK .*|//p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$sed -n -e 's/^__//' -e '/|Undef/d' -e '/|Proc/s/ .*//p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$sed -n -e 's/^.*|Proc .*|Text *| *//p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$sed -n -e '/Def. Text/s/.* \([^ ]*\)\$/\1/p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$sed -n -e 's/^[-0-9a-f ]*_\(.*\)=.*/\1/p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="$sed -n -e 's/.*\.text n\ \ \ \.//p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
elif com="sed -n -e 's/^__.*//' -e 's/[       ]*D[    ]*[0-9]*.*//p'";\
	eval $xscan;\
	$contains '^fprintf$' libc.list >/dev/null 2>&1; then
		eval $xrun
else
	$nm -p $* 2>/dev/null >libc.tmp
	$grep fprintf libc.tmp > libc.ptf
	if com="$sed -n -e 's/^.* [ADTSIW]  *_[_.]*//p' -e 's/^.* [ADTSIW] //p'";\
		eval $xscan; $contains '^fprintf$' libc.list >/dev/null 2>&1
	then
		nm_opt='-p'
		eval $xrun
	else
		echo " "
		echo "$nm didn't seem to work right. Trying $ar instead..." >&4
		com=''
		if $ar t $libc > libc.tmp && $contains '^fprintf$' libc.tmp >/dev/null 2>&1; then
			for thisname in $libnames $libc; do
				$ar t $thisname >>libc.tmp
			done
			$sed -e "s/\\$_o\$//" < libc.tmp > libc.list
			echo "Ok." >&4
		elif test "X$osname" = "Xos2" && $ar tv $libc > libc.tmp; then
			# Repeat libc to extract forwarders to DLL entries too
			for thisname in $libnames $libc; do
				$ar tv $thisname >>libc.tmp
				# Revision 50 of EMX has bug in $ar.
				# it will not extract forwarders to DLL entries
				# Use emximp which will extract exactly them.
				emximp -o tmp.imp $thisname \
				    2>/dev/null && \
				    $sed -e 's/^\([_a-zA-Z0-9]*\) .*$/\1/p' \
				    < tmp.imp >>libc.tmp
				$rm tmp.imp
			done
			$sed -e "s/\\$_o\$//" -e 's/^ \+//' < libc.tmp > libc.list
			echo "Ok." >&4
		else
			echo "$ar didn't seem to work right." >&4
			echo "Maybe this is a Cray...trying bld instead..." >&4
			if bld t $libc | $sed -e 's/.*\///' -e "s/\\$_o:.*\$//" > libc.list
			then
				for thisname in $libnames; do
					bld t $libnames | \
					$sed -e 's/.*\///' -e "s/\\$_o:.*\$//" >>libc.list
					$ar t $thisname >>libc.tmp
				done
				echo "Ok." >&4
			else
				echo "That didn't work either.  Giving up." >&4
				exit 1
			fi
		fi
	fi
fi
nm_extract="$com"
if $test -f /lib/syscalls.exp; then
	echo " "
	echo "Also extracting names from /lib/syscalls.exp for good ole AIX..." >&4
	$sed -n 's/^\([^ 	]*\)[ 	]*syscall[0-9]*$/\1/p' /lib/syscalls.exp >>libc.list
fi
;;
esac
$rm -f libnames libpath

: is a C symbol defined?
csym='tlook=$1;
case "$3" in
-v) tf=libc.tmp; tc=""; tdc="";;
-a) tf=libc.tmp; tc="[0]"; tdc="[]";;
*) tlook="^$1\$"; tf=libc.list; tc="()"; tdc="()";;
esac;
tx=yes;
case "$reuseval-$4" in
true-) ;;
true-*) tx=no; eval "tval=\$$4"; case "$tval" in "") tx=yes;; esac;;
esac;
case "$tx" in
yes)
	case "$runnm" in
	true)
		if $contains $tlook $tf >/dev/null 2>&1;
		then tval=true;
		else tval=false;
		fi;;
	*)
		echo "int main() { extern short $1$tdc; printf(\"%hd\", $1$tc); }" > t.c;
		if $cc -o t $optimize $ccflags $ldflags t.c $libs >/dev/null 2>&1;
		then tval=true;
		else tval=false;
		fi;
		$rm -f t t.c;;
	esac;;
*)
	case "$tval" in
	$define) tval=true;;
	*) tval=false;;
	esac;;
esac;
eval "$2=$tval"'

: define an is-in-libc? function
inlibc='echo " "; td=$define; tu=$undef;
sym=$1; var=$2; eval "was=\$$2";
tx=yes;
case "$reuseval$was" in
true) ;;
true*) tx=no;;
esac;
case "$tx" in
yes)
	set $sym tres -f;
	eval $csym;
	case "$tres" in
	true)
		echo "$sym() found." >&4;
		case "$was" in $undef) . ./whoa; esac; eval "$var=\$td";;
	*)
		echo "$sym() NOT found." >&4;
		case "$was" in $define) . ./whoa; esac; eval "$var=\$tu";;
	esac;;
*)
	case "$was" in
	$define) echo "$sym() found." >&4;;
	*) echo "$sym() NOT found." >&4;;
	esac;;
esac'

: see if sqrtl exists
set sqrtl d_sqrtl
eval $inlibc

case "$ccflags" in
*-DUSE_LONG_DOUBLE*|*-DUSE_MORE_BITS*) uselongdouble="$define" ;;
esac

case "$uselongdouble" in
$define|true|[yY]*)	dflt='y';;
*) dflt='n';;
esac
cat <<EOM

Perl can be built to take advantage of long doubles which
(if available) may give more accuracy and range for floating point numbers.

If this doesn't make any sense to you, just accept the default '$dflt'.
EOM
rp='Try to use long doubles if available?'
. ./myread
case "$ans" in
y|Y) 	val="$define"	;;
*)      val="$undef"	;;
esac
set uselongdouble
eval $setvar

case "$uselongdouble" in
true|[yY]*) uselongdouble="$define" ;;
esac

case "$uselongdouble" in
$define)
: Look for a hint-file generated 'call-back-unit'.  If the
: user has specified that long doubles should be used,
: we may need to set or change some other defaults.
	if $test -f uselongdouble.cbu; then
		echo "Your platform has some specific hints for long doubles, using them..."
		. ./uselongdouble.cbu
	else
		$cat <<EOM
(Your platform doesn't have any specific hints for long doubles.)
EOM
	fi
	;;
esac

case "$uselongdouble:$d_sqrtl" in
$define:$undef)
		$cat <<EOM >&4

*** You requested the use of long doubles but you do not seem to have
*** the mathematic functions for long doubles.  I'm disabling the use
*** of long doubles.

EOM
	uselongdouble=$undef
	;;
esac

: check for length of double
echo " "
case "$doublesize" in
'')
	echo "Checking to see how big your double precision numbers are..." >&4
	$cat >try.c <<'EOCP'
#include <stdio.h>
int main()
{
    printf("%d\n", (int)sizeof(double));
    exit(0);
}
EOCP
	set try
	if eval $compile_ok; then
		doublesize=`./try`
		echo "Your double is $doublesize bytes long."
	else
		dflt='8'
		echo "(I can't seem to compile the test program.  Guessing...)"
		rp="What is the size of a double precision number (in bytes)?"
		. ./myread
		doublesize="$ans"
	fi
	;;
esac
$rm -f try.c try

: check for long doubles
echo " "
echo "Checking to see if you have long double..." >&4
echo 'int main() { long double x = 7.0; }' > try.c
set try
if eval $compile; then
	val="$define"
	echo "You have long double."
else
	val="$undef"
	echo "You do not have long double."
fi
$rm try.*
set d_longdbl
eval $setvar

: check for length of long double
case "${d_longdbl}${longdblsize}" in
$define)
	echo " "
	echo "Checking to see how big your long doubles are..." >&4
	$cat >try.c <<'EOCP'
#include <stdio.h>
int main()
{
	printf("%d\n", sizeof(long double));
}
EOCP
	set try
	set try
	if eval $compile; then
		longdblsize=`./try$exe_ext`
		echo "Your long doubles are $longdblsize bytes long."
	else
		dflt='8'
		echo " "
		echo "(I can't seem to compile the test program.  Guessing...)" >&4
		rp="What is the size of a long double (in bytes)?"
		. ./myread
		longdblsize="$ans"
	fi
	if $test "X$doublesize" = "X$longdblsize"; then
		echo "(That isn't any different from an ordinary double.)"
	fi	
	;;
esac
$rm -f try.* try

: determine the architecture name
echo " "
if xxx=`./loc arch blurfl $pth`; $test -f "$xxx"; then
	tarch=`arch`"-$osname"
elif xxx=`./loc uname blurfl $pth`; $test -f "$xxx" ; then
	if uname -m > tmparch 2>&1 ; then
		tarch=`$sed -e 's/ *$//' -e 's/ /_/g' \
			-e 's/$/'"-$osname/" tmparch`
	else
		tarch="$osname"
	fi
	$rm -f tmparch
else
	tarch="$osname"
fi
case "$myarchname" in
''|"$tarch") ;;
*)
	echo "(Your architecture name used to be $myarchname.)"
	archname=''
	;;
esac
myarchname="$tarch"
case "$archname" in
'') dflt="$tarch";;
*) dflt="$archname";;
esac
rp='What is your architecture name'
. ./myread
archname="$ans"
case "$usethreads" in
$define)
	echo "Threads selected." >&4
	case "$archname" in
        *-thread*) echo "...and architecture name already has -thread." >&4
                ;;
        *)      archname="$archname-thread"
                echo "...setting architecture name to $archname." >&4
                ;;
        esac
	;;
esac
case "$usemultiplicity" in
$define)
	echo "Multiplicity selected." >&4
	case "$archname" in
        *-multi*) echo "...and architecture name already has -multi." >&4
                ;;
        *)      archname="$archname-multi"
                echo "...setting architecture name to $archname." >&4
                ;;
        esac
	;;
esac
case "$use64bitint$use64bitall" in
*"$define"*)
	case "$archname64" in
	'')
		echo "This architecture is naturally 64-bit, not changing architecture name." >&4
		;;
	*)
		case "$use64bitint" in
		"$define") echo "64 bit integers selected." >&4 ;;
		esac
		case "$use64bitall" in
		"$define") echo "Maximal 64 bitness selected." >&4 ;;
		esac
		case "$archname" in
	        *-$archname64*) echo "...and architecture name already has $archname64." >&4
	                ;;
	        *)      archname="$archname-$archname64"
	                echo "...setting architecture name to $archname." >&4
	                ;;
	        esac
		;;
	esac
esac
case "$uselongdouble" in
$define)
	echo "Long doubles selected." >&4
	case "$longdblsize" in
	$doublesize)
		"...but long doubles are equal to doubles, not changing architecture name." >&4
		;;
	*)
		case "$archname" in
	        *-ld*) echo "...and architecture name already has -ld." >&4
	                ;;
	        *)      archname="$archname-ld"
	                echo "...setting architecture name to $archname." >&4
        	        ;;
	        esac
		;;
	esac
	;;
esac

: determine root of directory hierarchy where package will be installed.
case "$prefix" in
'')
	dflt=`./loc . /usr/local /usr/local /local /opt /usr`
	;;
*)
	dflt="$prefix"
	;;
esac
$cat <<EOM

By default, $package will be installed in $dflt/bin, manual pages
under $dflt/man, etc..., i.e. with $dflt as prefix for all
installation directories. Typically this is something like /usr/local.
If you wish to have binaries under /usr/bin but other parts of the
installation under /usr/local, that's ok: you will be prompted
separately for each of the installation directories, the prefix being
only used to set the defaults.

EOM
fn=d~
rp='Installation prefix to use?'
. ./getfile
oldprefix=''
case "$prefix" in
'') ;;
*)
	case "$ans" in
	"$prefix") ;;
	*) oldprefix="$prefix";;
	esac
	;;
esac
prefix="$ans"
prefixexp="$ansexp"

: is AFS running?
echo " "
case "$afs" in
$define|true)	afs=true ;;
$undef|false)	afs=false ;;
*)	if test -d /afs; then
		afs=true
	else
		afs=false
	fi
	;;
esac
if $afs; then
	echo "AFS may be running... I'll be extra cautious then..." >&4
else
	echo "AFS does not seem to be running..." >&4
fi

: determine installation prefix for where package is to be installed.
if $afs; then 
$cat <<EOM

Since you are running AFS, I need to distinguish the directory in which
files will reside from the directory in which they are installed (and from
which they are presumably copied to the former directory by occult means).

EOM
	case "$installprefix" in
	'') dflt=`echo $prefix | sed 's#^/afs/#/afs/.#'`;;
	*) dflt="$installprefix";;
	esac
else
$cat <<EOM

In some special cases, particularly when building $package for distribution,
it is convenient to distinguish between the directory in which files should 
be installed from the directory ($prefix) in which they 
will eventually reside.  For most users, these two directories are the same.

EOM
	case "$installprefix" in
	'') dflt=$prefix ;;
	*) dflt=$installprefix;;
	esac
fi
fn=d~
rp='What installation prefix should I use for installing files?'
. ./getfile
installprefix="$ans"
installprefixexp="$ansexp"

: set the prefixit variable, to compute a suitable default value
prefixit='case "$3" in
""|none)
	case "$oldprefix" in
	"") eval "$1=\"\$$2\"";;
	*)
		case "$3" in
		"") eval "$1=";;
		none)
			eval "tp=\"\$$2\"";
			case "$tp" in
			""|" ") eval "$1=\"\$$2\"";;
			*) eval "$1=";;
			esac;;
		esac;;
	esac;;
*)
	eval "tp=\"$oldprefix-\$$2-\""; eval "tp=\"$tp\"";
	case "$tp" in
	--|/*--|\~*--) eval "$1=\"$prefix/$3\"";;
	/*-$oldprefix/*|\~*-$oldprefix/*)
		eval "$1=\`echo \$$2 | sed \"s,^$oldprefix,$prefix,\"\`";;
	*) eval "$1=\"\$$2\"";;
	esac;;
esac'


: get the patchlevel
echo " "
echo "Getting the current patchlevel..." >&4
if $test -r $rsrc/patchlevel.h;then
	revision=`awk '/define[ 	]+PERL_REVISION/ {print $3}' $rsrc/patchlevel.h`
	patchlevel=`awk '/define[ 	]+PERL_VERSION/ {print $3}' $rsrc/patchlevel.h`
	subversion=`awk '/define[ 	]+PERL_SUBVERSION/ {print $3}' $rsrc/patchlevel.h`
	api_revision=`awk '/define[ 	]+PERL_API_REVISION/ {print $3}' $rsrc/patchlevel.h`
	api_version=`awk '/define[ 	]+PERL_API_VERSION/ {print $3}' $rsrc/patchlevel.h`
	api_subversion=`awk '/define[ 	]+PERL_API_SUBVERSION/ {print $3}' $rsrc/patchlevel.h`
else
	revision=0
	patchlevel=0
	subversion=0
	api_revision=0
	api_version=0
	api_subversion=0
fi
$echo "(You have $package version $patchlevel subversion $subversion.)"
case "$osname" in
dos|vms)
	: XXX Should be a Configure test for double-dots in filenames.
	version=`echo $revision $patchlevel $subversion | \
		 $awk '{ printf "%d_%d_%d\n", $1, $2, $3 }'`
	api_versionstring=`echo $api_revision $api_version $api_subversion | \
		 $awk '{ printf "%d_%d_%d\n", $1, $2, $3 }'`
	;;
*)
	version=`echo $revision $patchlevel $subversion | \
		 $awk '{ printf "%d.%d.%d\n", $1, $2, $3 }'`
	api_versionstring=`echo $api_revision $api_version $api_subversion | \
		 $awk '{ printf "%d.%d.%d\n", $1, $2, $3 }'`
	;;
esac
: Special case the 5.005_xx maintenance series, which used 5.005
: without any subversion label as a subdirectory in $sitelib
if test "${api_revision}${api_version}${api_subversion}" = "550"; then
	api_versionstring='5.005'
fi

: determine installation style
: For now, try to deduce it from prefix unless it is already set.
: Reproduce behavior of 5.005 and earlier, maybe drop that in 5.7.
case "$installstyle" in
'')	case "$prefix" in
		*perl*) dflt='lib';;
		*) dflt='lib/perl5' ;;
	esac
	;;
*)	dflt="$installstyle" ;;
esac
: Probably not worth prompting for this since we prompt for all
: the directories individually, and the prompt would be too long and
: confusing anyway.
installstyle=$dflt

: determine where private library files go
: Usual default is /usr/local/lib/perl5/$version.
: Also allow things like /opt/perl/lib/$version, since 
: /opt/perl/lib/perl5... would be redundant.
: The default "style" setting is made in installstyle.U
case "$installstyle" in
*lib/perl5*) set dflt privlib lib/$package/$version ;;
*)	 set dflt privlib lib/$version ;;
esac
eval $prefixit
$cat <<EOM

There are some auxiliary files for $package that need to be put into a
private library directory that is accessible by everyone.

EOM
fn=d~+
rp='Pathname where the private library files will reside?'
. ./getfile
privlib="$ans"
privlibexp="$ansexp"
: Change installation prefix, if necessary.
if $test X"$prefix" != X"$installprefix"; then
	installprivlib=`echo $privlibexp | sed "s#^$prefix#$installprefix#"`
else
	installprivlib="$privlibexp"
fi

: set the prefixup variable, to restore leading tilda escape
prefixup='case "$prefixexp" in
"$prefix") ;;
*) eval "$1=\`echo \$$1 | sed \"s,^$prefixexp,$prefix,\"\`";;
esac'

: determine where public architecture dependent libraries go
set archlib archlib
eval $prefixit
: privlib default is /usr/local/lib/$package/$version
: archlib default is /usr/local/lib/$package/$version/$archname
: privlib may have an optional trailing /share.
tdflt=`echo $privlib | $sed 's,/share$,,'`
tdflt=$tdflt/$archname
case "$archlib" in
'')	dflt=$tdflt
	;;
*)	dflt="$archlib"
    ;;
esac
$cat <<EOM

$spackage contains architecture-dependent library files.  If you are
sharing libraries in a heterogeneous environment, you might store
these files in a separate location.  Otherwise, you can just include
them with the rest of the public library files.

EOM
fn=d+~
rp='Where do you want to put the public architecture-dependent libraries?'
. ./getfile
archlib="$ans"
archlibexp="$ansexp"
if $test X"$archlib" = X"$privlib"; then
	d_archlib="$undef"
else
	d_archlib="$define"
fi
: Change installation prefix, if necessary.
if $test X"$prefix" != X"$installprefix"; then
	installarchlib=`echo $archlibexp | sed "s#^$prefix#$installprefix#"`
else
	installarchlib="$archlibexp"
fi


: Binary compatibility with 5.005 is not possible for builds
: with advanced features
case "$usethreads$usemultiplicity" in
*define*)
	bincompat5005="$undef"
	d_bincompat5005="$undef"
	;;
*)	$cat <<EOM

This version of Perl can be compiled for binary compatibility with 5.005.
If you decide to do so, you will be able to continue using most of the
extensions that were compiled for Perl 5.005.

EOM
	case "$bincompat5005$d_bincompat5005" in
	*"$undef"*) dflt=n ;;
	*) dflt=y ;;
	esac
	rp='Binary compatibility with Perl 5.005?'
	. ./myread
	case "$ans" in
	y*) val="$define" ;;
	*)  val="$undef" ;;
	esac
	set d_bincompat5005
	eval $setvar
	case "$d_bincompat5005" in
	"$define")
		bincompat5005="$define"
		;;
	*)	bincompat5005="$undef"
		d_bincompat5005="$undef"
		;;
	esac
	;;
esac


: see if setuid scripts can be secure
$cat <<EOM

Some kernels have a bug that prevents setuid #! scripts from being
secure.  Some sites have disabled setuid #! scripts because of this.

First let's decide if your kernel supports secure setuid #! scripts.
(If setuid #! scripts would be secure but have been disabled anyway,
don't say that they are secure if asked.)

EOM

val="$undef"
if $test -d /dev/fd; then
	echo "#!$ls" >reflect
	chmod +x,u+s reflect
	./reflect >flect 2>&1
	if $contains "/dev/fd" flect >/dev/null; then
		echo "Congratulations, your kernel has secure setuid scripts!" >&4
		val="$define"
	else
		$cat <<EOM
If you are not sure if they are secure, I can check but I'll need a
username and password different from the one you are using right now.
If you don't have such a username or don't want me to test, simply
enter 'none'.

EOM
		rp='Other username to test security of setuid scripts with?'
		dflt='none'
		. ./myread
		case "$ans" in
		n|none)
			case "$d_suidsafe" in
			'')	echo "I'll assume setuid scripts are *not* secure." >&4
				dflt=n;;
			"$undef")
				echo "Well, the $hint value is *not* secure." >&4
				dflt=n;;
			*)	echo "Well, the $hint value *is* secure." >&4
				dflt=y;;
			esac
			;;
		*)
			$rm -f reflect flect
			echo "#!$ls" >reflect
			chmod +x,u+s reflect
			echo >flect
			chmod a+w flect
			echo '"su" will (probably) prompt you for '"$ans's password."
			su $ans -c './reflect >flect'
			if $contains "/dev/fd" flect >/dev/null; then
				echo "Okay, it looks like setuid scripts are secure." >&4
				dflt=y
			else
				echo "I don't think setuid scripts are secure." >&4
				dflt=n
			fi
			;;
		esac
		rp='Does your kernel have *secure* setuid scripts?'
		. ./myread
		case "$ans" in
		[yY]*)	val="$define";;
		*)	val="$undef";;
		esac
	fi
else
	echo "I don't think setuid scripts are secure (no /dev/fd directory)." >&4
	echo "(That's for file descriptors, not floppy disks.)"
	val="$undef"
fi
set d_suidsafe
eval $setvar

$rm -f reflect flect

: now see if they want to do setuid emulation
echo " "
val="$undef"
case "$d_suidsafe" in
"$define")
	val="$undef"
	echo "No need to emulate SUID scripts since they are secure here." >& 4
	;;
*)
	$cat <<EOM
Some systems have disabled setuid scripts, especially systems where
setuid scripts cannot be secure.  On systems where setuid scripts have
been disabled, the setuid/setgid bits on scripts are currently
useless.  It is possible for $package to detect those bits and emulate
setuid/setgid in a secure fashion.  This emulation will only work if
setuid scripts have been disabled in your kernel.

EOM
	case "$d_dosuid" in
	"$define") dflt=y ;;
	*) dflt=n ;;
	esac
	rp="Do you want to do setuid/setgid emulation?"
	. ./myread
	case "$ans" in
	[yY]*)	val="$define";;
	*)	val="$undef";;
	esac
	;;
esac
set d_dosuid
eval $setvar

: determine filename position in cpp output
echo " "
echo "Computing filename position in cpp output for #include directives..." >&4
echo '#include <stdio.h>' > foo.c
$cat >fieldn <<EOF
$startsh
$cppstdin $cppflags $cppminus <foo.c 2>/dev/null | \
$grep '^[ 	]*#.*stdio\.h' | \
while read cline; do
	pos=1
	set \$cline
	while $test \$# -gt 0; do
		if $test -r \`echo \$1 | $tr -d '"'\`; then
			echo "\$pos"
			exit 0
		fi
		shift
		pos=\`expr \$pos + 1\`
	done
done
EOF
chmod +x fieldn
fieldn=`./fieldn`
$rm -f foo.c fieldn
case $fieldn in
'') pos='???';;
1) pos=first;;
2) pos=second;;
3) pos=third;;
*) pos="${fieldn}th";;
esac
echo "Your cpp writes the filename in the $pos field of the line."

: locate header file
$cat >findhdr <<EOF
$startsh
wanted=\$1
name=''
for usrincdir in $usrinc
do
	if test -f \$usrincdir/\$wanted; then
		echo "\$usrincdir/\$wanted"
		exit 0
	fi
done
awkprg='{ print \$$fieldn }'
echo "#include <\$wanted>" > foo\$\$.c
$cppstdin $cppminus $cppflags < foo\$\$.c 2>/dev/null | \
$grep "^[ 	]*#.*\$wanted" | \
while read cline; do
	name=\`echo \$cline | $awk "\$awkprg" | $tr -d '"'\`
	case "\$name" in
	*[/\\\\]\$wanted) echo "\$name"; exit 1;;
	*[\\\\/]\$wanted) echo "\$name"; exit 1;;
	*) exit 2;;
	esac;
done;
#
# status = 0: grep returned 0 lines, case statement not executed
# status = 1: headerfile found
# status = 2: while loop executed, no headerfile found
#
status=\$?
$rm -f foo\$\$.c;
if test \$status -eq 1; then
	exit 0;
fi
exit 1
EOF
chmod +x findhdr

: define an alternate in-header-list? function
inhdr='echo " "; td=$define; tu=$undef; yyy=$@;
cont=true; xxf="echo \"<\$1> found.\" >&4";
case $# in 2) xxnf="echo \"<\$1> NOT found.\" >&4";;
*) xxnf="echo \"<\$1> NOT found, ...\" >&4";;
esac;
case $# in 4) instead=instead;; *) instead="at last";; esac;
while $test "$cont"; do
	xxx=`./findhdr $1`
	var=$2; eval "was=\$$2";
	if $test "$xxx" && $test -r "$xxx";
	then eval $xxf;
	eval "case \"\$$var\" in $undef) . ./whoa; esac"; eval "$var=\$td";
		cont="";
	else eval $xxnf;
	eval "case \"\$$var\" in $define) . ./whoa; esac"; eval "$var=\$tu"; fi;
	set $yyy; shift; shift; yyy=$@;
	case $# in 0) cont="";;
	2) xxf="echo \"but I found <\$1> $instead.\" >&4";
		xxnf="echo \"and I did not find <\$1> either.\" >&4";;
	*) xxf="echo \"but I found <\$1\> instead.\" >&4";
		xxnf="echo \"there is no <\$1>, ...\" >&4";;
	esac;
done;
while $test "$yyy";
do set $yyy; var=$2; eval "was=\$$2";
	eval "case \"\$$var\" in $define) . ./whoa; esac"; eval "$var=\$tu";
	set $yyy; shift; shift; yyy=$@;
done'

: see if this is a malloc.h system
set malloc.h i_malloc
eval $inhdr

: see if stdlib is available
set stdlib.h i_stdlib
eval $inhdr

: determine which malloc to compile in
echo " "
case "$usemymalloc" in
''|[yY]*|true|$define)	dflt='y' ;;
*)	dflt='n' ;;
esac
rp="Do you wish to attempt to use the malloc that comes with $package?"
. ./myread
usemymalloc="$ans"
case "$ans" in
y*|true)
	usemymalloc='y'
	mallocsrc='malloc.c'
	mallocobj="malloc$_o"
	d_mymalloc="$define"
	case "$libs" in
	*-lmalloc*)
		: Remove malloc from list of libraries to use
		echo "Removing unneeded -lmalloc from library list" >&4
		set `echo X $libs | $sed -e 's/-lmalloc / /' -e 's/-lmalloc$//'`
		shift
		libs="$*"
		echo "libs = $libs" >&4
		;;
	esac
	;;
*)
	usemymalloc='n'
	mallocsrc=''
	mallocobj=''
	d_mymalloc="$undef"
	;;
esac

: compute the return types of malloc and free
echo " "
$cat >malloc.c <<END
#$i_malloc I_MALLOC
#$i_stdlib I_STDLIB
#include <stdio.h>
#include <sys/types.h>
#ifdef I_MALLOC
#include <malloc.h>
#endif
#ifdef I_STDLIB
#include <stdlib.h>
#endif
#ifdef TRY_MALLOC
void *malloc();
#endif
#ifdef TRY_FREE
void free();
#endif
END
case "$malloctype" in
'')
	if $cc $ccflags -c -DTRY_MALLOC malloc.c >/dev/null 2>&1; then
		malloctype='void *'
	else
		malloctype='char *'
	fi
	;;
esac
echo "Your system wants malloc to return '$malloctype', it would seem." >&4

case "$freetype" in
'')
	if $cc $ccflags -c -DTRY_FREE malloc.c >/dev/null 2>&1; then
		freetype='void'
	else
		freetype='int'
	fi
	;;
esac
echo "Your system uses $freetype free(), it would seem." >&4
$rm -f malloc.[co]
$cat <<EOM

After $package is installed, you may wish to install various
add-on modules and utilities.  Typically, these add-ons will
be installed under $prefix with the rest
of this package.  However, you may wish to install such add-ons
elsewhere under a different prefix.

If you do not wish to put everything under a single prefix, that's
ok.  You will be prompted for the individual locations; this siteprefix
is only used to suggest the defaults.

The default should be fine for most people.

EOM
fn=d~+
rp='Installation prefix to use for add-on modules and utilities?'
: XXX Here might be another good place for an installstyle setting.
case "$siteprefix" in
'') dflt=$prefix ;;
*)  dflt=$siteprefix ;;
esac
. ./getfile
: XXX Prefixit unit does not yet support siteprefix and vendorprefix
oldsiteprefix=''
case "$siteprefix" in
'') ;;
*)	case "$ans" in
	"$prefix") ;;
	*) oldsiteprefix="$prefix";;
	esac
	;;
esac
siteprefix="$ans"
siteprefixexp="$ansexp"

: determine where site specific libraries go.
: Usual default is /usr/local/lib/perl5/site_perl/$version
: The default "style" setting is made in installstyle.U
: XXX No longer works with Prefixit stuff.
prog=`echo $package | $sed 's/-*[0-9.]*$//'`
case "$sitelib" in
'') case "$installstyle" in
	*lib/perl5*) dflt=$siteprefix/lib/$package/site_$prog/$version ;;
	*)	 dflt=$siteprefix/lib/site_$prog/$version ;;
	esac
	;;
*)	dflt="$sitelib"
	;;
esac
$cat <<EOM

The installation process will create a directory for
site-specific extensions and modules.  Most users find it convenient
to place all site-specific files in this directory rather than in the
main distribution directory.

EOM
fn=d~+
rp='Pathname for the site-specific library files?'
. ./getfile
sitelib="$ans"
sitelibexp="$ansexp"
sitelib_stem=`echo "$sitelibexp" | sed "s,/$version$,,"`
: Change installation prefix, if necessary.
if $test X"$prefix" != X"$installprefix"; then
	installsitelib=`echo $sitelibexp | $sed "s#^$prefix#$installprefix#"`
else
	installsitelib="$sitelibexp"
fi

: determine where site specific architecture-dependent libraries go.
: sitelib  default is /usr/local/lib/perl5/site_perl/$version
: sitearch default is /usr/local/lib/perl5/site_perl/$version/$archname
: sitelib may have an optional trailing /share.
case "$sitearch" in
'')	dflt=`echo $sitelib | $sed 's,/share$,,'`
	dflt="$dflt/$archname"
	;;
*)	dflt="$sitearch"
	;;
esac
set sitearch sitearch none
eval $prefixit
$cat <<EOM

The installation process will also create a directory for
architecture-dependent site-specific extensions and modules.

EOM
fn=d~+
rp='Pathname for the site-specific architecture-dependent library files?'
. ./getfile
sitearch="$ans"
sitearchexp="$ansexp"
: Change installation prefix, if necessary.
if $test X"$prefix" != X"$installprefix"; then
	installsitearch=`echo $sitearchexp | sed "s#^$prefix#$installprefix#"`
else
	installsitearch="$sitearchexp"
fi

$cat <<EOM

The installation process will also create a directory for
vendor-supplied add-ons.  Vendors who supply perl with their system
may find it convenient to place all vendor-supplied files in this
directory rather than in the main distribution directory.  This will
ease upgrades between binary-compatible maintenance versions of perl.

Of course you may also use these directories in whatever way you see
fit.  For example, you might use them to access modules shared over a
company-wide network.

The default answer should be fine for most people.
This causes further questions about vendor add-ons to be skipped
and no vendor-specific directories will be configured for perl.

EOM
rp='Do you want to configure vendor-specific add-on directories?'
case "$usevendorprefix" in
define|true|[yY]*) dflt=y ;;
*)	: User may have set vendorprefix directly on Configure command line.
	case "$vendorprefix" in
	''|' ') dflt=n ;;
	*)	dflt=y ;;
	esac
	;;
esac
. ./myread
case "$ans" in
[yY]*)	fn=d~+
	rp='Installation prefix to use for vendor-supplied add-ons?'
	case "$vendorprefix" in
	'') dflt='' ;;
	*)  dflt=$vendorprefix ;;
	esac
	. ./getfile
	: XXX Prefixit unit does not yet support siteprefix and vendorprefix
	oldvendorprefix=''
	case "$vendorprefix" in
	'') ;;
	*)	case "$ans" in
		"$prefix") ;;
		*) oldvendorprefix="$prefix";;
		esac
		;;
	esac
	usevendorprefix="$define"
	vendorprefix="$ans"
	vendorprefixexp="$ansexp"
	;;
*)	usevendorprefix="$undef"
	vendorprefix=''
	vendorprefixexp=''
	;;
esac

case "$vendorprefix" in
'')	d_vendorlib="$undef"
	vendorlib=''
	vendorlibexp=''
	;;
*)	d_vendorlib="$define"
	: determine where vendor-supplied modules go.
	: Usual default is /usr/local/lib/perl5/vendor_perl/$version
	case "$vendorlib" in
	'')
		prog=`echo $package | $sed 's/-*[0-9.]*$//'`
		case "$installstyle" in
		*lib/perl5*) dflt=$vendorprefix/lib/$package/vendor_$prog/$version ;;
		*)	     dflt=$vendorprefix/lib/vendor_$prog/$version ;;
		esac
		;;
	*)	dflt="$vendorlib"
		;;
	esac
	fn=d~+
	rp='Pathname for the vendor-supplied library files?'
	. ./getfile
	vendorlib="$ans"
	vendorlibexp="$ansexp"
	;;
esac
vendorlib_stem=`echo "$vendorlibexp" | sed "s,/$version$,,"`
: Change installation prefix, if necessary.
if $test X"$prefix" != X"$installprefix"; then
	installvendorlib=`echo $vendorlibexp | $sed "s#^$prefix#$installprefix#"`
else
	installvendorlib="$vendorlibexp"
fi

case "$vendorprefix" in
'')	d_vendorarch="$undef"
	vendorarch=''
	vendorarchexp=''
	;;
*)	d_vendorarch="$define"
	: determine where vendor-supplied architecture-dependent libraries go.
	: vendorlib  default is /usr/local/lib/perl5/vendor_perl/$version
	: vendorarch default is /usr/local/lib/perl5/vendor_perl/$version/$archname
	: vendorlib may have an optional trailing /share.
	case "$vendorarch" in
	'')	dflt=`echo $vendorlib | $sed 's,/share$,,'`
		dflt="$dflt/$archname"
		;;
	*)	dflt="$vendorarch" ;;
	esac
	fn=d~+
	rp='Pathname for vendor-supplied architecture-dependent files?'
	. ./getfile
	vendorarch="$ans"
	vendorarchexp="$ansexp"
	;;
esac
: Change installation prefix, if necessary.
if $test X"$prefix" != X"$installprefix"; then
	installvendorarch=`echo $vendorarchexp | sed "s#^$prefix#$installprefix#"`
else
	installvendorarch="$vendorarchexp"
fi

: Final catch-all directories to search
$cat <<EOM

Lastly, you can have perl look in other directories for extensions and
modules in addition to those already specified.
These directories will be searched after 
	$sitearch 
	$sitelib 
EOM
test X"$vendorlib" != "X" && echo '	' $vendorlib
test X"$vendorarch" != "X" && echo '	' $vendorarch
echo ' '
case "$otherlibdirs" in
''|' ') dflt='none' ;;
*)	dflt="$otherlibdirs" ;;
esac
$cat <<EOM
Enter a colon-separated set of extra paths to include in perl's @INC
search path, or enter 'none' for no extra paths.

EOM

rp='Colon-separated list of additional directories for perl to search?'
. ./myread
case "$ans" in
' '|''|none)	otherlibdirs=' ' ;;     
*)	otherlibdirs="$ans" ;;
esac
case "$otherlibdirs" in
' ') val=$undef ;;
*)	val=$define ;;
esac
set d_perl_otherlibdirs
eval $setvar

: Cruising for prototypes
echo " "
echo "Checking out function prototypes..." >&4
$cat >prototype.c <<'EOCP'
int main(int argc, char *argv[]) {
	exit(0);}
EOCP
if $cc $ccflags -c prototype.c >prototype.out 2>&1 ; then
	echo "Your C compiler appears to support function prototypes."
	val="$define"
else
	echo "Your C compiler doesn't seem to understand function prototypes."
	val="$undef"
fi
set prototype
eval $setvar
$rm -f prototype*

case "$prototype" in
"$define") ;;
*)	ansi2knr='ansi2knr'
	echo " "
	cat <<EOM >&4

$me:  FATAL ERROR:
This version of $package can only be compiled by a compiler that 
understands function prototypes.  Unfortunately, your C compiler 
	$cc $ccflags
doesn't seem to understand them.  Sorry about that.

If GNU cc is available for your system, perhaps you could try that instead.  

Eventually, we hope to support building Perl with pre-ANSI compilers.
If you would like to help in that effort, please contact <perlbug@perl.org>.

Aborting Configure now.
EOM
	exit 2
	;;
esac

: determine where public executables go
echo " "
set dflt bin bin
eval $prefixit
fn=d~
rp='Pathname where the public executables will reside?'
. ./getfile
if $test "X$ansexp" != "X$binexp"; then
	installbin=''
fi
bin="$ans"
binexp="$ansexp"
: Change installation prefix, if necessary.
: XXX Bug? -- ignores Configure -Dinstallprefix setting.
if $test X"$prefix" != X"$installprefix"; then
	installbin=`echo $binexp | sed "s#^$prefix#$installprefix#"`
else
	installbin="$binexp"
fi

: Find perl5.005 or later.
echo "Looking for a previously installed perl5.005 or later... "
case "$perl5" in
'')	for tdir in `echo "$binexp:$PATH" | $sed "s/$path_sep/ /g"`; do
		: Check if this perl is recent and can load a simple module
		if $test -x $tdir/perl && $tdir/perl -Mless -e 'use 5.005;' >/dev/null 2>&1; then
			perl5=$tdir/perl
			break;
		elif $test -x $tdir/perl5 && $tdir/perl5 -Mless -e 'use 5.005;' >/dev/null 2>&1; then
			perl5=$tdir/perl
			break;
		fi
	done
	;;
*)	perl5="$perl5"
	;;
esac
case "$perl5" in
'')	echo "None found.  That's ok.";;
*)	echo "Using $perl5." ;;
esac

: Determine list of previous versions to include in @INC
$cat > getverlist <<EOPL
#!$perl5 -w
use File::Basename;
\$api_versionstring = "$api_versionstring";
\$version = "$version";
\$stem = "$sitelib_stem";
\$archname = "$archname";
EOPL
	$cat >> getverlist <<'EOPL'
# Can't have leading @ because metaconfig interprets it as a command!
;@inc_version_list=();
# XXX Redo to do opendir/readdir? 
if (-d $stem) {
    chdir($stem);
    ;@candidates = glob("5.*");
}
else {
    ;@candidates = ();
}

# XXX ToDo:  These comparisons must be reworked when two-digit
# subversions come along, so that 5.7.10 compares as greater than
# 5.7.3!  By that time, hope that 5.6.x is sufficiently
# widespread that we can use the built-in version vectors rather
# than reinventing them here.  For 5.6.0, however, we must
# assume this script will likely be run by 5.005_0x.  --AD 1/2000.
foreach $d (@candidates) {
    if ($d lt $version) {
	if ($d ge $api_versionstring) {
	    unshift(@inc_version_list, grep { -d } "$d/$archname", $d);
	}
	elsif ($d ge "5.005") {
	    unshift(@inc_version_list, grep { -d } $d);
	}
    }
    else {
	# Skip newer version.  I.e. don't look in
	# 5.7.0 if we're installing 5.6.1.
    }
}

if (@inc_version_list) {
    print join(' ', @inc_version_list);
}
else {
    # Blank space to preserve value for next Configure run.
    print " ";
}
EOPL
chmod +x getverlist
case "$inc_version_list" in
'')	if test -x "$perl5"; then
		dflt=`$perl5 getverlist`
	else
		dflt='none'
	fi
	;;
$undef) dflt='none' ;;
*)  dflt="$inc_version_list" ;;
esac
case "$dflt" in
''|' ') dflt=none ;;
esac
case "$dflt" in
5.005) case "$bincompat5005" in
       $define|true|[yY]*) ;;
       *) dflt=none ;;
       esac
       ;;
esac
$cat <<'EOM'

In order to ease the process of upgrading, this version of perl 
can be configured to use modules built and installed with earlier 
versions of perl that were installed under $prefix.  Specify here
the list of earlier versions that this version of perl should check.
If Configure detected no earlier versions of perl installed under
$prefix, then the list will be empty.  Answer 'none' to tell perl
to not search earlier versions.

The default should almost always be sensible, so if you're not sure,
just accept the default.
EOM

rp='List of earlier versions to include in @INC?'
. ./myread
case "$ans" in
[Nn]one|''|' ') inc_version_list=' ' ;;
*) inc_version_list="$ans" ;;
esac
case "$inc_version_list" in
''|' ') 
	inc_version_list_init='0';;
*)	inc_version_list_init=`echo $inc_version_list |
		$sed -e 's/^/"/' -e 's/ /","/g' -e 's/$/",0/'`
	;;
esac
$rm -f getverlist

: determine whether to install perl also as /usr/bin/perl

echo " "
if $test -d /usr/bin -a "X$installbin" != X/usr/bin; then
	$cat <<EOM
Many scripts expect perl to be installed as /usr/bin/perl.
I can install the perl you are about to compile also as /usr/bin/perl
(in addition to $installbin/perl).
EOM
	case "$installusrbinperl" in
	"$undef"|[nN]*)	dflt='n';;
	*)		dflt='y';;
	esac
	rp="Do you want to install perl as /usr/bin/perl?"
	. ./myread
	case "$ans" in
	[yY]*)	val="$define";;
	*)	val="$undef" ;;
	esac
else
	val="$undef"
fi
set installusrbinperl
eval $setvar

: see if dld is available
set dld.h i_dld
eval $inhdr

: see if dlopen exists
xxx_runnm="$runnm"
runnm=false
set dlopen d_dlopen
eval $inlibc
runnm="$xxx_runnm"

: determine which dynamic loading, if any, to compile in
echo " "
dldir="ext/DynaLoader"
case "$usedl" in
$define|y|true)
	dflt='y'
	usedl="$define"
	;;
$undef|n|false)
	dflt='n'
	usedl="$undef"
	;;
*) 
	dflt='n'
	case "$d_dlopen" in
	    $define) dflt='y' ;;
	esac
	case "$i_dld" in
	    $define) dflt='y' ;;
	esac
	: Does a dl_xxx.xs file exist for this operating system
	$test -f $rsrc/$dldir/dl_${osname}.xs && dflt='y'
	;;
esac
rp="Do you wish to use dynamic loading?"
. ./myread
usedl="$ans"
case "$ans" in
y*) usedl="$define"
	case "$dlsrc" in
	'')
		if $test -f $rsrc/$dldir/dl_${osname}.xs ; then
			dflt="$dldir/dl_${osname}.xs"
		elif $test "$d_dlopen" = "$define" ; then
			dflt="$dldir/dl_dlopen.xs"
		elif $test "$i_dld" = "$define" ; then
			dflt="$dldir/dl_dld.xs"
		else
			dflt=''
		fi
		;;
	*)	dflt="$dldir/$dlsrc"
		;;
	esac
    echo "The following dynamic loading files are available:"
	: Can not go over to $dldir because getfile has path hard-coded in.
	tdir=`pwd`; cd $rsrc; $ls -C $dldir/dl*.xs; cd $tdir
	rp="Source file to use for dynamic loading"
	fn="fne"
	gfpth="$src"
	. ./getfile
	usedl="$define"
	: emulate basename
	dlsrc=`echo $ans | $sed -e 's%.*/\([^/]*\)$%\1%'`

	$cat << EOM

Some systems may require passing special flags to $cc -c to
compile modules that will be used to create a shared library.
To use no flags, say "none".

EOM
    case "$cccdlflags" in
    '')	case "$gccversion" in
		'') case "$osname" in
			hpux)	dflt='+z' ;;
			next)	dflt='none' ;;
			irix*)	dflt='-KPIC' ;;
			svr4*|esix*|solaris|nonstopux) dflt='-KPIC' ;;
			sunos)	dflt='-pic' ;;
			*)	dflt='none' ;;
		    esac
			;;
		*)  case "$osname" in
			svr4*|esix*|solaris|nonstopux) dflt='-fPIC' ;;
			*)	dflt='-fpic' ;;
		    esac ;;
	    esac ;;
	' ') dflt='none' ;;
    *)	dflt="$cccdlflags" ;;
    esac
    rp="Any special flags to pass to $cc -c to compile shared library modules?"
    . ./myread
    case "$ans" in
    none) cccdlflags=' ' ;;
    *) cccdlflags="$ans" ;;
    esac

    cat << EOM

Some systems use ld to create libraries that can be dynamically loaded,
while other systems (such as those using ELF) use $cc.

EOM
	case "$ld" in
	'')	$cat >try.c <<'EOM'
/* Test for whether ELF binaries are produced */
#include <fcntl.h>
#include <stdlib.h>
int main() {
	char b[4];
	int i = open("a.out",O_RDONLY);
	if(i == -1) 
		exit(1); /* fail */
	if(read(i,b,4)==4 && b[0]==127 && b[1]=='E' && b[2]=='L' && b[3]=='F')
		exit(0); /* succeed (yes, it's ELF) */
	else
		exit(1); /* fail */
}
EOM
		if $cc $ccflags try.c >/dev/null 2>&1 && ./a.out; then
			cat <<EOM
You appear to have ELF support.  I'll use $cc to build dynamic libraries.
EOM
			dflt="$cc"
		else
			echo "I'll use ld to build dynamic libraries."
			dflt='ld'
		fi
		rm -f try.c a.out
		;;
	*)	dflt="$ld"
		;;
	esac

    rp="What command should be used to create dynamic libraries?"
    . ./myread
	ld="$ans"

    cat << EOM

Some systems may require passing special flags to $ld to create a
library that can be dynamically loaded.  If your ld flags include
-L/other/path options to locate libraries outside your loader's normal
search path, you may need to specify those -L options here as well.  To
use no flags, say "none".

EOM
    case "$lddlflags" in
    '') case "$osname" in
  			beos) dflt='-nostart' ;;
			hpux) dflt='-b';
			      case "$gccversion" in
			      '') dflt="$dflt +vnocompatwarnings" ;;
			      esac
			      ;;	
			linux|irix*)	dflt='-shared' ;;
			next)  dflt='none' ;;
			solaris) dflt='-G' ;;
			sunos) dflt='-assert nodefinitions' ;;
			svr4*|esix*|nonstopux) dflt="-G $ldflags" ;;
	        *)     dflt='none' ;;
			esac
			;;
    *) dflt="$lddlflags" ;;
    esac

	: Try to guess additional flags to pick up local libraries.
	: Be careful not to append to a plain 'none'
	case "$dflt" in
	none) dflt='' ;;
	esac
	for thisflag in $ldflags; do
		case "$thisflag" in
		-L*|-R*)
			case " $dflt " in
			*" $thisflag "*) ;;
			*) dflt="$dflt $thisflag" ;;
			esac
			;;
		esac
	done

	case "$dflt" in
	''|' ') dflt='none' ;;
	esac

    rp="Any special flags to pass to $ld to create a dynamically loaded library?"
    . ./myread
    case "$ans" in
    none) lddlflags=' ' ;;
    *) lddlflags="$ans" ;;
    esac

	cat <<EOM

Some systems may require passing special flags to $cc to indicate that
the resulting executable will use dynamic linking.  To use no flags,
say "none".

EOM
    case "$ccdlflags" in
    '') case "$osname" in
		hpux)	dflt='-Wl,-E' ;;
		linux)	dflt='-rdynamic' ;;
		next)	dflt='none' ;;
		sunos)	dflt='none' ;;
		*)	dflt='none' ;;
	    esac ;;
    ' ')  dflt='none' ;;
    *)  dflt="$ccdlflags" ;;
    esac
    rp="Any special flags to pass to $cc to use dynamic linking?"
    . ./myread
    case "$ans" in
    none) ccdlflags=' ' ;;
    *) ccdlflags="$ans" ;;
    esac
    ;;
*)  usedl="$undef"
	ld='ld'
    dlsrc='dl_none.xs'
    lddlflags=''
    ccdlflags=''
    ;;
esac

also=''
case "$usedl" in
$undef)
	# No dynamic loading being used, so don't bother even to prompt.
	useshrplib='false'
	;;
*)	case "$useshrplib" in
	'')	case "$osname" in
		svr4*|nonstopux|dgux|dynixptx|esix|powerux|beos|cygwin*)
			dflt=y
			also='Building a shared libperl is required for dynamic loading to work on your system.'
			;;
		next*)
			case "$osvers" in
			4*)	dflt=y
				also='Building a shared libperl is needed for MAB support.'
				;;
			*)	dflt=n
				;;
			esac
			;;
		*)	dflt=n
			;;
		esac
		;;
	$define|true|[Yy]*)
		dflt=y
		;;
	*)	dflt=n
		;;
	esac
	$cat << EOM

The perl executable is normally obtained by linking perlmain.c with
libperl${_a}, any static extensions (usually just DynaLoader), and
any other libraries needed on this system (such as -lm, etc.).  Since
your system supports dynamic loading, it is probably possible to build
a shared libperl.$so.  If you will have more than one executable linked
to libperl.$so, this will significantly reduce the size of each
executable, but it may have a noticeable affect on performance.  The
default is probably sensible for your system.
$also

EOM
	rp="Build a shared libperl.$so (y/n)"
	. ./myread
	case "$ans" in
	true|$define|[Yy]*)
		useshrplib='true'  ;;
	*)	useshrplib='false' ;;
	esac
	;;
esac

case "$useshrplib" in
true)
	case "$libperl" in
	'')
		# Figure out a good name for libperl.so.  Since it gets stored in
		# a version-specific architecture-dependent library, the version
		# number isn't really that important, except for making cc/ld happy.
		#
		# A name such as libperl.so.3.1
		majmin="libperl.$so.$patchlevel.$subversion"
		# A name such as libperl.so.301
		majonly=`echo $patchlevel $subversion |
			$awk '{printf "%d%02d", $1, $2}'`
		majonly=libperl.$so.$majonly
		# I'd prefer to keep the os-specific stuff here to a minimum, and
		# rely on figuring it out from the naming of libc.
		case "${osname}${osvers}" in
		next4*)
			dflt=libperl.5.$so
			# XXX How handle the --version stuff for MAB?
			;;
		linux*)  # ld won't link with a bare -lperl otherwise.
			dflt=libperl.$so
			;;
		cygwin*) # include version
			dflt=`echo libperl$version | sed -e 's/\./_/g'`$lib_ext
			;;
		*)	# Try to guess based on whether libc has major.minor.
			case "$libc" in
			*libc.$so.[0-9]*.[0-9]*) dflt=$majmin ;;
			*libc.$so.[0-9]*) dflt=$majonly ;;
			*)	dflt=libperl.$so ;;
			esac
			;;
		esac
		;;
	*)	dflt=$libperl
		;;
	esac
	cat << EOM

I need to select a good name for the shared libperl.  If your system uses
library names with major and minor numbers, then you might want something
like $majmin.  Alternatively, if your system uses a single version
number for shared libraries, then you might want to use $majonly.
Or, your system might be quite happy with a simple libperl.$so.

Since the shared libperl will get installed into a version-specific
architecture-dependent directory, the version number of the shared perl
library probably isn't important, so the default should be o.k.

EOM
	rp='What name do you want to give to the shared libperl?'
	. ./myread
	libperl=$ans
	echo "Ok, I'll use $libperl"
	;;
*)
	libperl="libperl${_a}"
	;;
esac

# Detect old use of shrpdir via undocumented Configure -Dshrpdir
case "$shrpdir" in
'') ;;
*)	$cat >&4 <<EOM
WARNING:  Use of the shrpdir variable for the installation location of
the shared $libperl is not supported.  It was never documented and
will not work in this version.  Let me (perlbug@perl.org)
know of any problems this may cause.

EOM
	case "$shrpdir" in
	"$archlibexp/CORE")
		$cat >&4 <<EOM
But your current setting of $shrpdir is
the default anyway, so it's harmless.
EOM
		;;
	*)
		$cat >&4 <<EOM
Further, your current attempted setting of $shrpdir
conflicts with the value of $archlibexp/CORE
that installperl will use.
EOM
		;;
	esac
	;;
esac

# How will the perl executable find the installed shared $libperl?
# Add $xxx to ccdlflags.
# If we can't figure out a command-line option, use $shrpenv to
# set env LD_RUN_PATH.  The main perl makefile uses this.
shrpdir=$archlibexp/CORE
xxx=''
tmp_shrpenv=''
if "$useshrplib"; then
    case "$osname" in 
	aix)
		# We'll set it in Makefile.SH...
		;;
	solaris|netbsd)
		xxx="-R $shrpdir"
		;;
	freebsd)
		xxx="-Wl,-R$shrpdir"
		;;
	linux|irix*|dec_osf)
		xxx="-Wl,-rpath,$shrpdir"
		;;
	next)
		# next doesn't like the default...
		;;
	beos)
		# beos doesn't like the default, either.
		;;
	hpux*)
		# hpux doesn't like the default, either.
		tmp_shrpenv="env LDOPTS=\"+s +b${shrpdir}\""
		;;
	*)
		tmp_shrpenv="env LD_RUN_PATH=$shrpdir"
		;;
	esac
	case "$xxx" in
	'') ;;
	*)	
		# Only add $xxx if it isn't already in ccdlflags.
		case " $ccdlflags " in
		*" $xxx "*)	;;
		*)	ccdlflags="$ccdlflags $xxx"
			cat <<EOM >&4

Adding $xxx to the flags
passed to $ld so that the perl executable will find the 
installed shared $libperl.

EOM
			;;
		esac
		;;
	esac
fi
# Fix ccdlflags in AIX for building external extensions.
# (For building Perl itself bare -bE:perl.exp is needed,
#  Makefile.SH takes care of this.)
case "$osname" in
aix) ccdlflags="$ccdlflags -bE:$installarchlib/CORE/perl.exp" ;;
esac
# Respect a hint or command-line value.
case "$shrpenv" in
'') shrpenv="$tmp_shrpenv" ;;
esac
case "$ldlibpthname" in
'')	ldlibpthname=LD_LIBRARY_PATH ;;
none)	ldlibpthname='' ;;
esac

: determine where manual pages are on this system
echo " "
case "$sysman" in
'') 
	syspath='/usr/man/man1 /usr/man/mann /usr/man/manl /usr/man/local/man1'
	syspath="$syspath /usr/man/u_man/man1 /usr/share/man/man1"
	syspath="$syspath /usr/catman/u_man/man1 /usr/man/l_man/man1"
	syspath="$syspath /usr/local/man/u_man/man1 /usr/local/man/l_man/man1"
	syspath="$syspath /usr/man/man.L /local/man/man1 /usr/local/man/man1"
	sysman=`./loc . /usr/man/man1 $syspath`
	;;
esac
if $test -d "$sysman"; then
	echo "System manual is in $sysman." >&4
else
	echo "Could not find manual pages in source form." >&4
fi

: determine where manual pages go
set man1dir man1dir none
eval $prefixit
$cat <<EOM

$spackage has manual pages available in source form.
EOM
case "$nroff" in
nroff)
	echo "However, you don't have nroff, so they're probably useless to you."
	case "$man1dir" in
	'') man1dir="none";;
	esac;;
esac
echo "If you don't want the manual sources installed, answer 'none'."
case "$man1dir" in
' ') dflt=none
	;;
'')
	lookpath="$prefixexp/man/man1 $prefixexp/man/l_man/man1"
	lookpath="$lookpath $prefixexp/man/p_man/man1"
	lookpath="$lookpath $prefixexp/man/u_man/man1"
	lookpath="$lookpath $prefixexp/man/man.1"
	case "$sysman" in
	*/?_man*)	dflt=`./loc . $prefixexp/l_man/man1 $lookpath` ;;
	*)	dflt=`./loc . $prefixexp/man/man1 $lookpath` ;;
	esac
	set dflt
	eval $prefixup
	;;
*)  dflt="$man1dir"
	;;
esac
echo " "
fn=dn+~
rp="Where do the main $spackage manual pages (source) go?"
. ./getfile
if $test "X$man1direxp" != "X$ansexp"; then
	installman1dir=''
fi
man1dir="$ans"
man1direxp="$ansexp"
case "$man1dir" in
'')	man1dir=' '
	installman1dir='';;
esac

: Change installation prefix, if necessary.
if $test X"$prefix" != X"$installprefix"; then
	installman1dir=`echo $man1direxp | $sed "s#^$prefix#$installprefix#"`
else
	installman1dir="$man1direxp"
fi

: What suffix to use on installed man pages

case "$man1dir" in
' ')
	man1ext='0'
	;;
*)
	rp="What suffix should be used for the main $spackage man pages?"
	case "$man1ext" in
	'')	case "$man1dir" in
		*1)  dflt=1 ;;
		*1p) dflt=1p ;;
		*1pm) dflt=1pm ;;
		*l) dflt=l;;
		*n) dflt=n;;
		*o) dflt=o;;
		*p) dflt=p;;
		*C) dflt=C;;
		*L) dflt=L;;
		*L1) dflt=L1;;
		*) dflt=1;;
		esac
		;;
	*)	dflt="$man1ext";;
	esac
	. ./myread
	man1ext="$ans"
	;;
esac

: see if we can have long filenames
echo " "
first=123456789abcdef
$rm -f $first
if (echo hi >$first) 2>/dev/null; then
	if $test -f 123456789abcde; then
		echo 'You cannot have filenames longer than 14 characters.  Sigh.' >&4
		val="$undef"
	else
 		echo 'You can have filenames longer than 14 characters.'>&4
 		val="$define"
	fi
else
	$cat <<'EOM'
You can't have filenames longer than 14 chars.
You can't even think about them!
EOM
	val="$undef"
fi 
set d_flexfnam
eval $setvar
$rm -rf 123456789abcde*

: determine where library module manual pages go
set man3dir man3dir none
eval $prefixit
$cat <<EOM

$spackage has manual pages for many of the library modules.
EOM

case "$nroff" in
nroff)
	$cat <<'EOM'
However, you don't have nroff, so they're probably useless to you.
EOM
	case "$man3dir" in
	'') man3dir="none";;
	esac;;
esac

case "$d_flexfnam" in
undef)
	$cat <<'EOM'
However, your system can't handle the long file names like File::Basename.3. 
EOM
	case "$man3dir" in
	'') man3dir="none";;
	esac;;
esac

echo "If you don't want the manual sources installed, answer 'none'."
prog=`echo $package | $sed 's/-*[0-9.]*$//'`
case "$man3dir" in
'')	dflt=`echo "$man1dir" | $sed -e 's/man1/man3/g' -e 's/man\.1/man\.3/g'`
	if $test -d "$privlib/man/man3"; then
		cat <<EOM >&4

WARNING:  Previous versions of perl installed man3 pages into
$privlib/man/man3.  This version will suggest a 
new default of $dflt.  
EOM
		tdflt=$dflt
		dflt='n'
		rp='Do you wish to preserve the old behavior?(y/n)'
		. ./myread
		case "$ans" in
		y*) dflt="$privlib/man/man3" ;;
		*)  dflt=$tdflt ;;
		esac
    fi
	;;
*)	dflt="$man3dir" ;;
esac
case "$dflt" in
' ') dflt=none ;;
esac
echo " "
fn=dn+~
rp="Where do the $package library man pages (source) go?"
. ./getfile
man3dir="$ans"
man3direxp="$ansexp"
case "$man3dir" in
'')	man3dir=' '
	installman3dir='';;
esac

: Change installation prefix, if necessary.
if $test X"$prefix" != X"$installprefix"; then
	installman3dir=`echo $man3direxp | $sed "s#^$prefix#$installprefix#"`
else
	installman3dir="$man3direxp"
fi

: What suffix to use on installed man pages
case "$man3dir" in
' ')
	man3ext='0'
	;;
*)
	rp="What suffix should be used for the $package library man pages?"
	case "$man3ext" in
	'')	case "$man3dir" in
		*3)  dflt=3 ;;
		*3p) dflt=3p ;;
		*3pm) dflt=3pm ;;
		*l) dflt=l;;
		*n) dflt=n;;
		*o) dflt=o;;
		*p) dflt=p;;
		*C) dflt=C;;
		*L) dflt=L;;
		*L3) dflt=L3;;
		*) dflt=3;;
		esac
		;;
	*)	dflt="$man3ext";;
	esac
	. ./myread
	man3ext="$ans"
	;;
esac

: see if we have to deal with yellow pages, now NIS.
if $test -d /usr/etc/yp || $test -d /etc/yp; then
	if $test -f /usr/etc/nibindd; then
		echo " "
		echo "I'm fairly confident you're on a NeXT."
		echo " "
		rp='Do you get the hosts file via NetInfo?'
		dflt=y
		case "$hostcat" in
		nidump*) ;;
		'') ;;
		*) dflt=n;;
		esac
		. ./myread
		case "$ans" in
		y*) hostcat='nidump hosts .';;
		*)	case "$hostcat" in
			nidump*) hostcat='';;
			esac
			;;
		esac
	fi
	case "$hostcat" in
	nidump*) ;;
	*)
		case "$hostcat" in
		*ypcat*) dflt=y;;
		'') if $contains '^\+' /etc/passwd >/dev/null 2>&1; then
				dflt=y
			else
				dflt=n
			fi;;
		*) dflt=n;;
		esac
		echo " "
		rp='Are you getting the hosts file via yellow pages?'
		. ./myread
		case "$ans" in
		y*) hostcat='ypcat hosts';;
		*) hostcat='cat /etc/hosts';;
		esac
		;;
	esac
fi
case "$hostcat" in
'') test -f /etc/hosts && hostcat='cat /etc/hosts';;
esac
case "$groupcat" in
'') test -f /etc/group && groupcat='cat /etc/group';;
esac
case "$passcat" in
'') test -f /etc/passwd && passcat='cat /etc/passwd';;
esac

: now get the host name
echo " "
echo "Figuring out host name..." >&4
case "$myhostname" in
'') cont=true
	echo 'Maybe "hostname" will work...'
	if tans=`sh -c hostname 2>&1` ; then
		myhostname=$tans
		phostname=hostname
		cont=''
	fi
	;;
*) cont='';;
esac
if $test "$cont"; then
	if ./xenix; then
		echo 'Oh, dear.  Maybe "/etc/systemid" is the key...'
		if tans=`cat /etc/systemid 2>&1` ; then
			myhostname=$tans
			phostname='cat /etc/systemid'
			echo "Whadyaknow.  Xenix always was a bit strange..."
			cont=''
		fi
	elif $test -r /etc/systemid; then
		echo "(What is a non-Xenix system doing with /etc/systemid?)"
	fi
fi
if $test "$cont"; then
	echo 'No, maybe "uuname -l" will work...'
	if tans=`sh -c 'uuname -l' 2>&1` ; then
		myhostname=$tans
		phostname='uuname -l'
	else
		echo 'Strange.  Maybe "uname -n" will work...'
		if tans=`sh -c 'uname -n' 2>&1` ; then
			myhostname=$tans
			phostname='uname -n'
		else
			echo 'Oh well, maybe I can mine it out of whoami.h...'
			if tans=`sh -c $contains' sysname $usrinc/whoami.h' 2>&1` ; then
				myhostname=`echo "$tans" | $sed 's/^.*"\(.*\)"/\1/'`
				phostname="sed -n -e '"'/sysname/s/^.*\"\\(.*\\)\"/\1/{'"' -e p -e q -e '}' <$usrinc/whoami.h"
			else
				case "$myhostname" in
				'') echo "Does this machine have an identity crisis or something?"
					phostname='';;
				*)
					echo "Well, you said $myhostname before..."
					phostname='echo $myhostname';;
				esac
			fi
		fi
	fi
fi
: you do not want to know about this
set $myhostname
myhostname=$1

: verify guess
if $test "$myhostname" ; then
	dflt=y
	rp='Your host name appears to be "'$myhostname'".'" Right?"
	. ./myread
	case "$ans" in
	y*) ;;
	*) myhostname='';;
	esac
fi

: bad guess or no guess
while $test "X$myhostname" = X ; do
	dflt=''
	rp="Please type the (one word) name of your host:"
	. ./myread
	myhostname="$ans"
done

: translate upper to lower if necessary
case "$myhostname" in
*[A-Z]*)
	echo "(Normalizing case in your host name)"
	myhostname=`echo $myhostname | ./tr '[A-Z]' '[a-z]'`
	;;
esac

case "$myhostname" in
*.*)
	dflt=`expr "X$myhostname" : "X[^.]*\(\..*\)"`
	myhostname=`expr "X$myhostname" : "X\([^.]*\)\."`
	echo "(Trimming domain name from host name--host name is now $myhostname)"
	;;
*) case "$mydomain" in
	'')
		{
			test "X$hostcat" = "Xypcat hosts" &&
			ypmatch "$myhostname" hosts 2>/dev/null |\
				$sed -e 's/[	 ]*#.*//; s/$/ /' > hosts && \
			$test -s hosts
		} || {
			test "X$hostcat" != "X" &&
		     	$hostcat | $sed -n -e "s/[	 ]*#.*//; s/\$/ /
					/[	 ]$myhostname[	. ]/p" > hosts
		}
		tmp_re="[	. ]"
		if $test -f hosts; then
			$test x`$awk "/[0-9].*[	 ]$myhostname$tmp_re/ { sum++ }
			     END { print sum }" hosts` = x1 || tmp_re="[	 ]"
			dflt=.`$awk "/[0-9].*[	 ]$myhostname$tmp_re/ {for(i=2; i<=NF;i++) print \\\$i}" \
				hosts | $sort | $uniq | \
				$sed -n -e "s/$myhostname\.\([-a-zA-Z0-9_.]\)/\1/p"`
			case `$echo X$dflt` in
			X*\ *)	echo "(Several hosts in the database matched hostname)"
				dflt=.
				;;
			X.) echo "(You do not have fully-qualified names in the hosts database)"
				;;
			esac
		else
			echo "(I cannot locate a hosts database anywhere)"
			dflt=.
		fi
		case "$dflt" in
		.)
			tans=`./loc resolv.conf X /etc /usr/etc`
			if $test -f "$tans"; then
				echo "(Attempting domain name extraction from $tans)"
				dflt=.`$sed -n -e 's/	/ /g' \
				  -e 's/^search  *\([^ ]*\).*/\1/p' $tans \
				  | ./tr '[A-Z]' '[a-z]' 2>/dev/null`
				case "$dflt" in
				.) dflt=.`$sed -n -e 's/	/ /g' \
				     -e 's/^domain  *\([^ ]*\).*/\1/p' $tans \
				     | ./tr '[A-Z]' '[a-z]' 2>/dev/null`
  					;;
				esac
			fi
			;;
		esac
		case "$dflt" in
		.) echo "(No help from resolv.conf either -- attempting clever guess)"
			dflt=.`sh -c domainname 2>/dev/null`
			case "$dflt" in
			'') dflt='.';;
			.nis.*|.yp.*|.main.*) dflt=`echo $dflt | $sed -e 's/^\.[^.]*//'`;;
			esac
			;;
		esac
		case "$dflt" in
		.) echo "(Lost all hope -- silly guess then)"
			dflt='.uucp'
			;;
		esac
		$rm -f hosts
		;;
	*) dflt="$mydomain";;
	esac;;
esac
echo " "
rp="What is your domain name?"
. ./myread
tans="$ans"
case "$ans" in
'') ;;
.*) ;;
*) tans=".$tans";;
esac
mydomain="$tans"

: translate upper to lower if necessary
case "$mydomain" in
*[A-Z]*)
	echo "(Normalizing case in your domain name)"
	mydomain=`echo $mydomain | ./tr '[A-Z]' '[a-z]'`
	;;
esac

: a little sanity check here
case "$phostname" in
'') ;;
*)
	case `$phostname | ./tr '[A-Z]' '[a-z]'` in
	$myhostname$mydomain|$myhostname) ;;
	*)
		case "$phostname" in
		sed*)
			echo "(That doesn't agree with your whoami.h file, by the way.)"
			;;
		*)
			echo "(That doesn't agree with your $phostname command, by the way.)"
			;;
		esac
	;;
	esac
	;;
esac

$cat <<EOM

I need to get your e-mail address in Internet format if possible, i.e.
something like user@host.domain. Please answer accurately since I have
no easy means to double check it. The default value provided below
is most probably close to reality but may not be valid from outside
your organization...

EOM
cont=x
while test "$cont"; do
	case "$cf_email" in
	'') dflt="$cf_by@$myhostname$mydomain";;
	*) dflt="$cf_email";;
	esac
	rp='What is your e-mail address?'
	. ./myread
	cf_email="$ans"
	case "$cf_email" in
	*@*.*) cont='' ;;
	*)
		rp='Address does not look like an Internet one.  Use it anyway?'
		case "$fastread" in
		yes) dflt=y ;;
		*) dflt=n ;;
		esac
		. ./myread
		case "$ans" in
		y*) cont='' ;;
		*) echo " " ;;
		esac
		;;
	esac
done

$cat <<EOM

If you or somebody else will be maintaining perl at your site, please
fill in the correct e-mail address here so that they may be contacted
if necessary. Currently, the "perlbug" program included with perl
will send mail to this address in addition to perlbug@perl.org. You may
enter "none" for no administrator.

EOM
case "$perladmin" in
'') dflt="$cf_email";;
*) dflt="$perladmin";;
esac
rp='Perl administrator e-mail address'
. ./myread
perladmin="$ans"

: determine whether to only install version-specific parts.
echo " "
$cat <<EOM
Do you want to install only the version-specific parts of the perl
distribution?  Usually you do *not* want to do this.
EOM
case "$versiononly" in
"$define"|[Yy]*|true) dflt='y' ;;
*) dflt='n';
esac
rp="Do you want to install only the version-specific parts of perl?"
. ./myread
case "$ans" in
[yY]*)	val="$define";;
*)	val="$undef" ;;
esac
set versiononly
eval $setvar

: figure out how to guarantee perl startup
case "$startperl" in
'')
	case "$sharpbang" in
	*!)
		$cat <<EOH

I can use the #! construct to start perl on your system. This will
make startup of perl scripts faster, but may cause problems if you
want to share those scripts and perl is not in a standard place
($binexp/perl) on all your platforms. The alternative is to force
a shell by starting the script with a single ':' character.

EOH
		case "$versiononly" in
		"$define")      dflt="$binexp/perl$version";;  
		*)              dflt="$binexp/perl";;
		esac
		rp='What shall I put after the #! to start up perl ("none" to not use #!)?'
		. ./myread
		case "$ans" in
		none)	startperl=": # use perl";;
		*)	startperl="#!$ans"
			if $test 30 -lt `echo "$ans" | wc -c`; then
				$cat >&4 <<EOM

WARNING:  Some systems limit the #! command to 32 characters.
If you experience difficulty running Perl scripts with #!, try
installing Perl in a directory with a shorter pathname.

EOM
			fi ;;
		esac
		;;
	*) startperl=": # use perl"
		;;
	esac
	;;
esac
echo "I'll use $startperl to start perl scripts."

: figure best path for perl in scripts
case "$perlpath" in
'')
	perlpath="$binexp/perl"
	case "$startperl" in
	*!*) ;;
	*)
		$cat <<EOH

I will use the "eval 'exec'" idiom to start Perl on your system.
I can use the full path of your Perl binary for this purpose, but
doing so may cause problems if you want to share those scripts and
Perl is not always in a standard place ($binexp/perl).

EOH
		dflt="$binexp/perl"
		rp="What path shall I use in \"eval 'exec'\"?"
		. ./myread
		perlpath="$ans"
		;;
	esac
	;;
esac
case "$startperl" in
*!*)	;;
*)	echo "I'll use $perlpath in \"eval 'exec'\"" ;;
esac

: determine where public executable scripts go
set scriptdir scriptdir
eval $prefixit
case "$scriptdir" in
'')
	dflt="$bin"
	: guess some guesses
	$test -d /usr/share/scripts && dflt=/usr/share/scripts
	$test -d /usr/share/bin     && dflt=/usr/share/bin
	$test -d /usr/local/script  && dflt=/usr/local/script
	$test -d /usr/local/scripts && dflt=/usr/local/scripts
	$test -d $prefixexp/script  && dflt=$prefixexp/script
	set dflt
	eval $prefixup
	;;
*)  dflt="$scriptdir"
	;;
esac
$cat <<EOM
 
Some installations have a separate directory just for executable scripts so
that they can mount it across multiple architectures but keep the scripts in
one spot.  You might, for example, have a subdirectory of /usr/share for this.
Or you might just lump your scripts in with all your other executables.
 
EOM
fn=d~
rp='Where do you keep publicly executable scripts?'
. ./getfile
if $test "X$ansexp" != "X$scriptdirexp"; then
	installscript=''
fi
scriptdir="$ans"
scriptdirexp="$ansexp"
: Change installation prefix, if necessary.
if $test X"$prefix" != X"$installprefix"; then
	installscript=`echo $scriptdirexp | sed "s#^$prefix#$installprefix#"`
else
	installscript="$scriptdirexp"
fi

: determine where add-on public executables go
case "$sitebin" in
'')	dflt=$siteprefix/bin ;;
*)	dflt=$sitebin ;;
esac
fn=d~
rp='Pathname where the add-on public executables should be installed?'
. ./getfile
sitebin="$ans"
sitebinexp="$ansexp"
: Change installation prefix, if necessary.
if $test X"$prefix" != X"$installprefix"; then
	installsitebin=`echo $sitebinexp | sed "s#^$prefix#$installprefix#"`
else
	installsitebin="$sitebinexp"
fi

case "$useperlio" in
$define|true|[yY]*)	dflt='y';;
*) dflt='n';;
esac
cat <<EOM

Previous version of $package used the standard IO mechanisms as defined
in <stdio.h>.  Versions 5.003_02 and later of perl allow alternate IO
mechanisms via a "PerlIO" abstraction, but the stdio mechanism is still
the default.  This abstraction layer can use AT&T's sfio (if you already
have sfio installed) or regular stdio.  Using PerlIO with sfio may cause
problems with some extension modules.  Using PerlIO with stdio is safe,
but it is slower than plain stdio and therefore is not the default.

If this doesn't make any sense to you, just accept the default '$dflt'.
EOM
rp='Use the experimental PerlIO abstraction layer?'
. ./myread
case "$ans" in
y|Y) 
	val="$define"
	;;     
*)      
	echo "Ok, doing things the stdio way"
	val="$undef"
	;;
esac
set useperlio
eval $setvar 

case "$vendorprefix" in
'')	d_vendorbin="$undef"
	vendorbin=''
	vendorbinexp=''
	;;
*)	d_vendorbin="$define"
	: determine where vendor-supplied executables go.
	case "$vendorbin" in
	'') dflt=$vendorprefix/bin ;;
	*)	dflt="$vendorbin" ;;
	esac
	fn=d~+
	rp='Pathname for the vendor-supplied executables directory?'
	. ./getfile
	vendorbin="$ans"
	vendorbinexp="$ansexp"
	;;
esac
: Change installation prefix, if necessary.
if $test X"$prefix" != X"$installprefix"; then
	installvendorbin=`echo $vendorbinexp | $sed "s#^$prefix#$installprefix#"`
else
	installvendorbin="$vendorbinexp"
fi

: see if qgcvt exists
set qgcvt d_qgcvt
eval $inlibc

echo " "

if $test X"$d_longdbl" = X"$define"; then

echo "Checking how to print long doubles..." >&4

if $test X"$sPRIfldbl" = X -a X"$doublesize" = X"$longdblsize"; then
	$cat >try.c <<'EOCP'
#include <sys/types.h>
#include <stdio.h>
int main() {
  double d = 123.456;
  printf("%.3f\n", d);
}
EOCP
	set try
	if eval $compile; then
		yyy=`./try$exe_ext`
		case "$yyy" in
		123.456)
			sPRIfldbl='"f"'; sPRIgldbl='"g"'; sPRIeldbl='"e"';
                	sPRIFUldbl='"F"'; sPRIGUldbl='"G"'; sPRIEUldbl='"E"';
			echo "We will use %f."
			;;
		esac
	fi
fi

if $test X"$sPRIfldbl" = X; then
	$cat >try.c <<'EOCP'
#include <sys/types.h>
#include <stdio.h>
int main() {
  long double d = 123.456;
  printf("%.3llf\n", d);
}
EOCP
	set try
	if eval $compile; then
		yyy=`./try$exe_ext`
		case "$yyy" in
		123.456)
			sPRIfldbl='"llf"'; sPRIgldbl='"llg"'; sPRIeldbl='"lle"';
                	sPRIFUldbl='"llF"'; sPRIGUldbl='"llG"'; sPRIEUldbl='"llE"';
			echo "We will use %llf."
			;;
		esac
	fi
fi

if $test X"$sPRIfldbl" = X; then
	$cat >try.c <<'EOCP'
#include <sys/types.h>
#include <stdio.h>
int main() {
  long double d = 123.456;
  printf("%.3Lf\n", d);
}
EOCP
	set try
	if eval $compile; then
		yyy=`./try$exe_ext`
		case "$yyy" in
		123.456)
			sPRIfldbl='"Lf"'; sPRIgldbl='"Lg"'; sPRIeldbl='"Le"';
                	sPRIFUldbl='"LF"'; sPRIGUldbl='"LG"'; sPRIEUldbl='"LE"';
			echo "We will use %Lf."
			;;
		esac
	fi
fi

if $test X"$sPRIfldbl" = X; then
	$cat >try.c <<'EOCP'
#include <sys/types.h>
#include <stdio.h>
int main() {
  long double d = 123.456;
  printf("%.3lf\n", d);
}
EOCP
	set try
	if eval $compile; then
		yyy=`./try$exe_ext`
		case "$yyy" in
		123.456)
			sPRIfldbl='"lf"'; sPRIgldbl='"lg"'; sPRIeldbl='"le"';
                	sPRIFUldbl='"lF"'; sPRIGUldbl='"lG"'; sPRIEUldbl='"lE"';
			echo "We will use %lf."
			;;
		esac
	fi
fi

if $test X"$sPRIfldbl" = X; then
	echo "Cannot figure out how to print long doubles." >&4
else
	sSCNfldbl=$sPRIfldbl	# expect consistency
fi

$rm -f try try.*

fi # d_longdbl

case "$sPRIfldbl" in
'')	d_PRIfldbl="$undef"; d_PRIgldbl="$undef"; d_PRIeldbl="$undef"; 
	d_PRIFUldbl="$undef"; d_PRIGUldbl="$undef"; d_PRIEUldbl="$undef"; 
	d_SCNfldbl="$undef";
	;;
*)	d_PRIfldbl="$define"; d_PRIgldbl="$define"; d_PRIeldbl="$define"; 
	d_PRIFUldbl="$define"; d_PRIGUldbl="$define"; d_PRIEUldbl="$define"; 
	d_SCNfldbl="$define";
	;;
esac

: Check how to convert floats to strings.
echo " "
echo "Checking for an efficient way to convert floats to strings."
echo " " > try.c
case "$uselongdouble" in
"$define") echo "#define USE_LONG_DOUBLE" >>try.c ;;
esac
case "$d_longdbl" in
"$define") echo "#define HAS_LONG_DOUBLE" >>try.c ;;
esac
case "$d_PRIgldbl" in
"$define") echo "#define HAS_PRIgldbl"    >>try.c ;;
esac
$cat >>try.c <<EOP
#ifdef TRY_gconvert
#define Gconvert(x,n,t,b) gconvert((x),(n),(t),(b))
char *myname = "gconvert";
#endif
#ifdef TRY_gcvt
#define Gconvert(x,n,t,b) gcvt((x),(n),(b))
char *myname = "gcvt";
#endif
#ifdef TRY_qgcvt
#define Gconvert(x,n,t,b) qgcvt((x),(n),(b))
char *myname = "qgcvt";
#define DOUBLETYPE long double
#endif
#ifdef TRY_sprintf
#if defined(USE_LONG_DOUBLE) && defined(HAS_LONG_DOUBLE) && defined(HAS_PRIgldbl)
#define Gconvert(x,n,t,b) sprintf((b),"%.*"$sPRIgldbl,(n),(x))
#else
#define Gconvert(x,n,t,b) sprintf((b),"%.*g",(n),(x))
#endif
char *myname = "sprintf";
#endif

#ifndef DOUBLETYPE
#if defined(USE_LONG_DOUBLE) && defined(HAS_LONG_DOUBLE)
#define DOUBLETYPE long double
#else
#define DOUBLETYPE double
#endif
#endif

#include <stdio.h>

#define I_STDLIB $i_stdlib
#ifdef I_STDLIB
#include <stdlib.h>
#endif

int
checkit(expect, got)
char *expect;
char *got;
{
    if (strcmp(expect, got)) {
		printf("%s oddity:  Expected %s, got %s\n",
			myname, expect, got);
		exit(1);
	}
}

int main()
{ 
	char buf[64]; 
	buf[63] = '\0';

	/* This must be 1st test on (which?) platform */
	/* Alan Burlison <AlanBurlsin@unn.unisys.com> */
	Gconvert((DOUBLETYPE)0.1, 8, 0, buf);
	checkit("0.1", buf);

	Gconvert((DOUBLETYPE)1.0, 8, 0, buf); 
	checkit("1", buf);

	Gconvert((DOUBLETYPE)1.1, 8, 0, buf); 
	checkit("1.1", buf);

	Gconvert((DOUBLETYPE)1.01, 8, 0, buf); 
	checkit("1.01", buf);

	Gconvert((DOUBLETYPE)1.001, 8, 0, buf); 
	checkit("1.001", buf);

	Gconvert((DOUBLETYPE)1.0001, 8, 0, buf); 
	checkit("1.0001", buf);

	Gconvert((DOUBLETYPE)1.00001, 8, 0, buf); 
	checkit("1.00001", buf);

	Gconvert((DOUBLETYPE)1.000001, 8, 0, buf); 
	checkit("1.000001", buf);

	Gconvert((DOUBLETYPE)0.0, 8, 0, buf); 
	checkit("0", buf);

	Gconvert((DOUBLETYPE)-1.0, 8, 0, buf); 
	checkit("-1", buf);

	/* Some Linux gcvt's give 1.e+5 here. */
	Gconvert((DOUBLETYPE)100000.0, 8, 0, buf); 
	checkit("100000", buf);
	
	/* Some Linux gcvt's give -1.e+5 here. */
	Gconvert((DOUBLETYPE)-100000.0, 8, 0, buf); 
	checkit("-100000", buf);

	Gconvert((DOUBLETYPE)123.456, 8, 0, buf); 
	checkit("123.456", buf);

	exit(0);
}
EOP
case "$d_Gconvert" in
gconvert*) xxx_list='gconvert gcvt sprintf' ;;
gcvt*) xxx_list='gcvt gconvert sprintf' ;;
sprintf*) xxx_list='sprintf gconvert gcvt' ;;
*) xxx_list='gconvert gcvt sprintf' ;;
esac

case "$d_longdbl$uselongdouble$d_PRIgldbl" in
"$define$define$define")
    # for long doubles prefer first qgcvt, then sprintf
    xxx_list="`echo $xxx_list|sed s/sprintf//`" 
    xxx_list="sprintf $xxx_list"
    case "$d_qgcvt" in
    "$define") xxx_list="qgcvt $xxx_list" ;;
    esac
    ;;
esac

for xxx_convert in $xxx_list; do
	echo "Trying $xxx_convert..."
	$rm -f try try$_o
	set try -DTRY_$xxx_convert
	if eval $compile; then
		echo "$xxx_convert() found." >&4
		if ./try; then
			echo "I'll use $xxx_convert to convert floats into a string." >&4
			break;
		else
			echo "...But $xxx_convert didn't work as I expected."
		fi
	else
		echo "$xxx_convert NOT found." >&4
	fi
done
	
case "$xxx_convert" in
gconvert) d_Gconvert='gconvert((x),(n),(t),(b))' ;;
gcvt) d_Gconvert='gcvt((x),(n),(b))' ;;
qgcvt) d_Gconvert='qgcvt((x),(n),(b))' ;;
*) case "$uselongdouble$d_longdbl$d_PRIgldbl" in
   "$define$define$define")
      d_Gconvert="sprintf((b),\"%.*\"$sPRIgldbl,(n),(x))" ;;
   *) d_Gconvert='sprintf((b),"%.*g",(n),(x))' ;;
   esac
   ;;  
esac

: Initialize h_fcntl
h_fcntl=false

: Initialize h_sysfile
h_sysfile=false

: access call always available on UNIX
set access d_access
eval $inlibc

: locate the flags for 'access()'
case "$d_access" in
"$define")
	echo " "
	$cat >access.c <<'EOCP'
#include <sys/types.h>
#ifdef I_FCNTL
#include <fcntl.h>
#endif
#ifdef I_SYS_FILE
#include <sys/file.h>
#endif
#ifdef I_UNISTD
#include <unistd.h>
#endif
int main() {
	exit(R_OK);
}
EOCP
	: check sys/file.h first, no particular reason here
	if $test `./findhdr sys/file.h` && \
		$cc -o access $cppflags -DI_SYS_FILE access.c >/dev/null 2>&1 ; then
		h_sysfile=true;
		echo "<sys/file.h> defines the *_OK access constants." >&4
	elif $test `./findhdr fcntl.h` && \
		$cc -o access $cppflags -DI_FCNTL access.c >/dev/null 2>&1 ; then
		h_fcntl=true;
		echo "<fcntl.h> defines the *_OK access constants." >&4
	elif $test `./findhdr unistd.h` && \
		$cc -o access $cppflags -DI_UNISTD access.c >/dev/null 2>&1 ; then
		echo "<unistd.h> defines the *_OK access constants." >&4
	else
		echo "I can't find the four *_OK access constants--I'll use mine." >&4
	fi
	;;
esac
$rm -f access*

: see if accessx exists
set accessx d_accessx
eval $inlibc

: see if alarm exists
set alarm d_alarm
eval $inlibc

: see if atolf exists
set atolf d_atolf
eval $inlibc

: see if atoll exists
set atoll d_atoll
eval $inlibc

: Look for GNU-cc style attribute checking
echo " "
echo "Checking whether your compiler can handle __attribute__ ..." >&4
$cat >attrib.c <<'EOCP'
#include <stdio.h>
void croak (char* pat,...) __attribute__((format(printf,1,2),noreturn));
EOCP
if $cc $ccflags -c attrib.c >attrib.out 2>&1 ; then
	if $contains 'warning' attrib.out >/dev/null 2>&1; then
		echo "Your C compiler doesn't fully support __attribute__."
		val="$undef"
	else
		echo "Your C compiler supports __attribute__."
		val="$define"
	fi
else
	echo "Your C compiler doesn't seem to understand __attribute__ at all."
	val="$undef"
fi
set d_attribut
eval $setvar
$rm -f attrib*

: see if bcmp exists
set bcmp d_bcmp
eval $inlibc

: see if bcopy exists
set bcopy d_bcopy
eval $inlibc

: see if this is a unistd.h system
set unistd.h i_unistd
eval $inhdr

: see if getpgrp exists
set getpgrp d_getpgrp
eval $inlibc

case "$d_getpgrp" in
"$define")
	echo " "
	echo "Checking to see which flavor of getpgrp is in use..."
	$cat >set.c <<EOP
#$i_unistd I_UNISTD
#include <sys/types.h>
#ifdef I_UNISTD
#  include <unistd.h>
#endif
int main()
{
	if (getuid() == 0) {
		printf("(I see you are running Configure as super-user...)\n");
		setuid(1);
	}
#ifdef TRY_BSD_PGRP
	if (getpgrp(1) == 0)
		exit(0);
#else
	if (getpgrp() > 0)
		exit(0);
#endif
	exit(1);
}
EOP
	if $cc -o set -DTRY_BSD_PGRP $ccflags $ldflags set.c $libs >/dev/null 2>&1 && ./set; then
		echo "You have to use getpgrp(pid) instead of getpgrp()." >&4
		val="$define"
	elif $cc -o set $ccflags $ldflags set.c $libs >/dev/null 2>&1 && ./set; then
		echo "You have to use getpgrp() instead of getpgrp(pid)." >&4
		val="$undef"
	else
		echo "I can't seem to compile and run the test program."
		if ./usg; then
			xxx="a USG one, i.e. you use getpgrp()."
		else
			# SVR4 systems can appear rather BSD-ish.
			case "$i_unistd" in
			$undef)
				xxx="a BSD one, i.e. you use getpgrp(pid)."
				val="$define"
				;;
			$define)
				xxx="probably a USG one, i.e. you use getpgrp()."
				val="$undef"
				;;
			esac
		fi
		echo "Assuming your getpgrp is $xxx" >&4
	fi
	;;
*) val="$undef";;
esac
set d_bsdgetpgrp
eval $setvar
$rm -f set set.c

: see if setpgrp exists
set setpgrp d_setpgrp
eval $inlibc

case "$d_setpgrp" in
"$define")
	echo " "
	echo "Checking to see which flavor of setpgrp is in use..."
	$cat >set.c <<EOP
#$i_unistd I_UNISTD
#include <sys/types.h>
#ifdef I_UNISTD
#  include <unistd.h>
#endif
int main()
{
	if (getuid() == 0) {
		printf("(I see you are running Configure as super-user...)\n");
		setuid(1);
	}
#ifdef TRY_BSD_PGRP
	if (-1 == setpgrp(1, 1))
		exit(0);
#else
	if (setpgrp() != -1)
		exit(0);
#endif
	exit(1);
}
EOP
	if $cc -o set -DTRY_BSD_PGRP $ccflags $ldflags set.c $libs >/dev/null 2>&1 && ./set; then
		echo 'You have to use setpgrp(pid,pgrp) instead of setpgrp().' >&4
		val="$define"
	elif $cc -o set $ccflags $ldflags set.c $libs >/dev/null 2>&1 && ./set; then
		echo 'You have to use setpgrp() instead of setpgrp(pid,pgrp).' >&4
		val="$undef"
	else
		echo "(I can't seem to compile and run the test program.)"
		if ./usg; then
			xxx="a USG one, i.e. you use setpgrp()."
		else
			# SVR4 systems can appear rather BSD-ish.
			case "$i_unistd" in
			$undef)
				xxx="a BSD one, i.e. you use setpgrp(pid,pgrp)."
				val="$define"
				;;
			$define)
				xxx="probably a USG one, i.e. you use setpgrp()."
				val="$undef"
				;;
			esac
		fi
		echo "Assuming your setpgrp is $xxx" >&4
	fi
	;;
*) val="$undef";;
esac
set d_bsdsetpgrp
eval $setvar
$rm -f set set.c
: see if bzero exists
set bzero d_bzero
eval $inlibc

: see if signal is declared as pointer to function returning int or void
echo " "
xxx=`./findhdr signal.h`
$test "$xxx" && $cppstdin $cppminus $cppflags < $xxx >$$.tmp 2>/dev/null
if $contains 'int.*\*[ 	]*signal' $$.tmp >/dev/null 2>&1 ; then
	echo "You have int (*signal())() instead of void." >&4
	val="$undef"
elif $contains 'void.*\*[ 	]*signal' $$.tmp >/dev/null 2>&1 ; then
	echo "You have void (*signal())()." >&4
	val="$define"
elif $contains 'extern[ 	]*[(\*]*signal' $$.tmp >/dev/null 2>&1 ; then
	echo "You have int (*signal())() instead of void." >&4
	val="$undef"
elif $contains 'void.*\*.*sig' $$.tmp >/dev/null 2>&1 ; then
	echo "You have void (*signal())()." >&4
	val="$define"
else
	case "$d_voidsig" in
	'')
	echo "I can't determine whether signal handler returns void or int..." >&4
		dflt=void
		rp="What type does your signal handler return?"
		. ./myread
		case "$ans" in
		v*) val="$define";;
		*) val="$undef";;
		esac;;
	"$define")
		echo "As you already told me, signal handler returns void." >&4
		val="$define"
		;;
	*)	echo "As you already told me, signal handler returns int." >&4
		val="$undef"
		;;
	esac
fi
set d_voidsig
eval $setvar
case "$d_voidsig" in
"$define") signal_t="void";;
*) signal_t="int";;
esac
$rm -f $$.tmp

: check for ability to cast large floats to 32-bit ints.
echo " "
echo 'Checking whether your C compiler can cast large floats to int32.' >&4
if $test "$intsize" -ge 4; then
	xxx=int
else
	xxx=long
fi
$cat >try.c <<EOCP
#include <stdio.h>
#include <sys/types.h>
#include <signal.h>
$signal_t blech(s) int s; { exit(3); }
int main()
{
	$xxx i32;
	double f, g;
	int result = 0;
	char str[16];
	signal(SIGFPE, blech);

	/* Don't let compiler optimize the test away.  Store the number 
	   in a writable string for gcc to pass to sscanf under HP/UX.
	*/
	sprintf(str, "2147483647");
	sscanf(str, "%lf", &f); /* f = (double) 0x7fffffff; */
	g = 10 * f;
	i32  = ($xxx) g;

	/* x86 processors will probably give 0x8000 0000, which is a
       sign change.  We don't want that.  We want to mimic SPARC
	   behavior here, which is to preserve the sign and give
	   back 0x7fff ffff.
	*/
	if (i32 != ($xxx) f)
		result |= 1;
	exit(result);
}
EOCP
set try
if eval $compile_ok; then
	./try
	yyy=$?
else
	echo "(I can't seem to compile the test program--assuming it can't)"
	yyy=1
fi
case "$yyy" in
0)	val="$define"
	echo "Yup, it can."
	;;
*)	val="$undef"
	echo "Nope, it can't."
	;;
esac
set d_casti32
eval $setvar
$rm -f try try.*

: check for ability to cast negative floats to unsigned
echo " "
echo 'Checking whether your C compiler can cast negative float to unsigned.' >&4
$cat >try.c <<EOCP
#include <stdio.h>
#include <sys/types.h>
#include <signal.h>
$signal_t blech(s) int s; { exit(7); }
$signal_t blech_in_list(s) int s; { exit(4); }
unsigned long dummy_long(p) unsigned long p; { return p; }
unsigned int dummy_int(p) unsigned int p; { return p; }
unsigned short dummy_short(p) unsigned short p; { return p; }
int main()
{
	double f;
	unsigned long along;
	unsigned int aint;
	unsigned short ashort;
	int result = 0;
	char str[16];
	
	/* Frustrate gcc-2.7.2's optimizer which failed this test with
	   a direct f = -123. assignment.  gcc-2.8.0 reportedly
	   optimized the whole file away
	*/
	/* Store the number in a writable string for gcc to pass to 
	   sscanf under HP/UX.
	*/
	sprintf(str, "-123");
	sscanf(str, "%lf", &f);  /* f = -123.; */

	signal(SIGFPE, blech);
	along = (unsigned long)f;
	aint = (unsigned int)f;
	ashort = (unsigned short)f;
	if (along != (unsigned long)-123)
		result |= 1;
	if (aint != (unsigned int)-123)
		result |= 1;
	if (ashort != (unsigned short)-123)
		result |= 1;
	sprintf(str, "1073741824.");
	sscanf(str, "%lf", &f); /* f = (double)0x40000000; */
	f = f + f;
	along = 0;
	along = (unsigned long)f;
	if (along != 0x80000000)
		result |= 2;
	f -= 1.;
	along = 0;
	along = (unsigned long)f;
	if (along != 0x7fffffff)
		result |= 1;
	f += 2.;
	along = 0;
	along = (unsigned long)f;
	if (along != 0x80000001)
		result |= 2;
	if (result)
		exit(result);
	signal(SIGFPE, blech_in_list);
	sprintf(str, "123.");
	sscanf(str, "%lf", &f);  /* f = 123.; */
	along = dummy_long((unsigned long)f);
	aint = dummy_int((unsigned int)f);
	ashort = dummy_short((unsigned short)f);
	if (along != (unsigned long)123)
		result |= 4;
	if (aint != (unsigned int)123)
		result |= 4;
	if (ashort != (unsigned short)123)
		result |= 4;
	exit(result);

}
EOCP
set try
if eval $compile_ok; then
	./try
	castflags=$?
else
	echo "(I can't seem to compile the test program--assuming it can't)"
	castflags=7
fi
case "$castflags" in
0)	val="$define"
	echo "Yup, it can."
	;;
*)	val="$undef"
	echo "Nope, it can't."
	;;
esac
set d_castneg
eval $setvar
$rm -f try.*

: see if vprintf exists
echo " "
if set vprintf val -f d_vprintf; eval $csym; $val; then
	echo 'vprintf() found.' >&4
	val="$define"
	$cat >vprintf.c <<'EOF'
#include <varargs.h>

int main() { xxx("foo"); }

xxx(va_alist)
va_dcl
{
	va_list args;
	char buf[10];

	va_start(args);
	exit((unsigned long)vsprintf(buf,"%s",args) > 10L);
}
EOF
	set vprintf
	if eval $compile && ./vprintf; then
		echo "Your vsprintf() returns (int)." >&4
		val2="$undef"
	else
		echo "Your vsprintf() returns (char*)." >&4
		val2="$define"
	fi
else
	echo 'vprintf() NOT found.' >&4
		val="$undef"
		val2="$undef"
fi
set d_vprintf
eval $setvar
val=$val2
set d_charvspr
eval $setvar

: see if chown exists
set chown d_chown
eval $inlibc

: see if chroot exists
set chroot d_chroot
eval $inlibc

: see if chsize exists
set chsize d_chsize
eval $inlibc

: check for const keyword
echo " "
echo 'Checking to see if your C compiler knows about "const"...' >&4
$cat >const.c <<'EOCP'
typedef struct spug { int drokk; } spug;
int main()
{
	const char *foo;
	const spug y;
}
EOCP
if $cc -c $ccflags const.c >/dev/null 2>&1 ; then
	val="$define"
	echo "Yup, it does."
else
	val="$undef"
	echo "Nope, it doesn't."
fi
set d_const
eval $setvar

: see if crypt exists
echo " "
if set crypt val -f d_crypt; eval $csym; $val; then
	echo 'crypt() found.' >&4
	val="$define"
	cryptlib=''
else
	cryptlib=`./loc Slibcrypt$_a "" $xlibpth`
	if $test -z "$cryptlib"; then
		cryptlib=`./loc Mlibcrypt$_a "" $xlibpth`
	else
		cryptlib=-lcrypt
	fi
	if $test -z "$cryptlib"; then
		cryptlib=`./loc Llibcrypt$_a "" $xlibpth`
	else
		cryptlib=-lcrypt
	fi
	if $test -z "$cryptlib"; then
		cryptlib=`./loc libcrypt$_a "" $libpth`
	else
		cryptlib=-lcrypt
	fi
	if $test -z "$cryptlib"; then
		echo 'crypt() NOT found.' >&4
		val="$undef"
	else
		val="$define"
	fi
fi
set d_crypt
eval $setvar

: get csh whereabouts
case "$csh" in
'csh') val="$undef" ;;
*) val="$define" ;;
esac
set d_csh
eval $setvar
: Respect a hint or command line value for full_csh.
case "$full_csh" in
'') full_csh=$csh ;;
esac

: see if cuserid exists
set cuserid d_cuserid
eval $inlibc

: see if this is a limits.h system
set limits.h i_limits
eval $inhdr

: see if this is a float.h system
set float.h i_float
eval $inhdr

: See if number of significant digits in a double precision number is known
echo " "
$cat >dbl_dig.c <<EOM
#$i_limits I_LIMITS
#$i_float I_FLOAT
#ifdef I_LIMITS
#include <limits.h>
#endif
#ifdef I_FLOAT
#include <float.h>
#endif
#ifdef DBL_DIG
printf("Contains DBL_DIG");
#endif
EOM
$cppstdin $cppflags $cppminus < dbl_dig.c >dbl_dig.E 2>/dev/null
if $contains 'DBL_DIG' dbl_dig.E >/dev/null 2>&1; then
	echo "DBL_DIG found." >&4
	val="$define"
else
	echo "DBL_DIG NOT found." >&4
	val="$undef"
fi
$rm -f dbl_dig.?
set d_dbl_dig
eval $setvar

: see if difftime exists
set difftime d_difftime
eval $inlibc

: see if this is a dirent system
echo " "
if xinc=`./findhdr dirent.h`; $test "$xinc"; then
	val="$define"
	echo "<dirent.h> found." >&4
else
	val="$undef"
	if xinc=`./findhdr sys/dir.h`; $test "$xinc"; then
		echo "<sys/dir.h> found." >&4
		echo " "
	else
		xinc=`./findhdr sys/ndir.h`
	fi
	echo "<dirent.h> NOT found." >&4
fi
set i_dirent
eval $setvar

: Look for type of directory structure.
echo " "
$cppstdin $cppflags $cppminus < "$xinc" > try.c

case "$direntrytype" in
''|' ')
	case "$i_dirent" in
	$define) guess1='struct dirent' ;;
	*) guess1='struct direct'  ;;
	esac
	;;
*)	guess1="$direntrytype"
	;;
esac

case "$guess1" in
'struct dirent') guess2='struct direct' ;;
*) guess2='struct dirent' ;;
esac
		
if $contains "$guess1" try.c >/dev/null 2>&1; then
	direntrytype="$guess1"
	echo "Your directory entries are $direntrytype." >&4
elif $contains "$guess2" try.c >/dev/null 2>&1; then
	direntrytype="$guess2"
	echo "Your directory entries seem to be $direntrytype." >&4
else
	echo "I don't recognize your system's directory entries." >&4
	rp="What type is used for directory entries on this system?"
	dflt="$guess1"
	. ./myread
	direntrytype="$ans"
fi
$rm -f try.c


: see if the directory entry stores field length
echo " "
$cppstdin $cppflags $cppminus < "$xinc" > try.c
if $contains 'd_namlen' try.c >/dev/null 2>&1; then
	echo "Good, your directory entry keeps length information in d_namlen." >&4
	val="$define"
else
	echo "Your directory entry does not know about the d_namlen field." >&4
	val="$undef"
fi
set d_dirnamlen
eval $setvar
$rm -f try.c

: see if dlerror exists
xxx_runnm="$runnm"
runnm=false
set dlerror d_dlerror
eval $inlibc
runnm="$xxx_runnm"

: see if dlfcn is available
set dlfcn.h i_dlfcn
eval $inhdr

case "$usedl" in
$define|y|true)
	$cat << EOM

On a few systems, the dynamically loaded modules that perl generates and uses
will need a different extension than shared libs. The default will probably
be appropriate.

EOM
	case "$dlext" in
	'')	dflt="$so" ;;
	*)	dflt="$dlext" ;;
	esac
	rp='What is the extension of dynamically loaded modules'
	. ./myread
	dlext="$ans"
	;;
*)
	dlext="none"
	;;
esac

: Check if dlsym need a leading underscore
echo " "
val="$undef"

case "$dlsrc" in
dl_dlopen.xs)
	echo "Checking whether your dlsym() needs a leading underscore ..." >&4
	$cat >dyna.c <<'EOM'
fred () { }
EOM

$cat >fred.c<<EOM

#include <stdio.h>
#$i_dlfcn I_DLFCN
#ifdef I_DLFCN
#include <dlfcn.h>      /* the dynamic linker include file for Sunos/Solaris */
#else
#include <sys/types.h>
#include <nlist.h>
#include <link.h>
#endif

extern int fred() ;

int main()
{
    void * handle ;
    void * symbol ;
#ifndef RTLD_LAZY
    int mode = 1 ;
#else
    int mode = RTLD_LAZY ;
#endif
    handle = dlopen("./dyna.$dlext", mode) ;
    if (handle == NULL) {
	printf ("1\n") ;
	fflush (stdout) ;
	exit(0);
    }
    symbol = dlsym(handle, "fred") ;
    if (symbol == NULL) {
	/* try putting a leading underscore */
	symbol = dlsym(handle, "_fred") ;
	if (symbol == NULL) {
	    printf ("2\n") ;
	    fflush (stdout) ;
	    exit(0);
	}
	printf ("3\n") ;
    }
    else
	printf ("4\n") ;
    fflush (stdout) ;
    exit(0);
}
EOM
	: Call the object file tmp-dyna.o in case dlext=o.
	if $cc $ccflags $cccdlflags -c dyna.c > /dev/null 2>&1 && 
		mv dyna${_o} tmp-dyna${_o} > /dev/null 2>&1 && 
		$ld -o dyna.$dlext $lddlflags tmp-dyna${_o} > /dev/null 2>&1 && 
		$cc -o fred $ccflags $ldflags $cccdlflags $ccdlflags fred.c $libs > /dev/null 2>&1; then
		xxx=`./fred`
		case $xxx in
		1)	echo "Test program failed using dlopen." >&4
			echo "Perhaps you should not use dynamic loading." >&4;;
		2)	echo "Test program failed using dlsym." >&4
			echo "Perhaps you should not use dynamic loading." >&4;;
		3)	echo "dlsym needs a leading underscore" >&4
			val="$define" ;;
		4)	echo "dlsym doesn't need a leading underscore." >&4;;
		esac
	else
		echo "I can't compile and run the test program." >&4
                echo "I'm guessing that dlsym doesn't need a leading underscore." >&4
	fi
	;;
esac
		
$rm -f fred fred.? dyna.$dlext dyna.? tmp-dyna.?

set d_dlsymun
eval $setvar

hasproto='varname=$1; func=$2; shift; shift;
while $test $# -ge 2; do
	case "$1" in
	$define) echo "#include <$2>";;
	esac ;
    shift 2;
done > try.c;
$cppstdin $cppflags $cppminus < try.c > tryout.c 2>/dev/null;
if $contains "$func.*(" tryout.c >/dev/null 2>&1; then
	echo "$func() prototype found.";
	val="$define";
else
	echo "$func() prototype NOT found.";
	val="$undef";
fi;
set $varname;
eval $setvar;
$rm -f try.c tryout.c'

: see if prototype for drand48 is available
echo " "
set d_drand48proto drand48 $i_stdlib stdlib.h $i_unistd unistd.h
eval $hasproto

: see if dup2 exists
set dup2 d_dup2
eval $inlibc

: see if eaccess exists
set eaccess d_eaccess
eval $inlibc

: see if endgrent exists
set endgrent d_endgrent
eval $inlibc

: see if endhostent exists
set endhostent d_endhent
eval $inlibc

: see if endnetent exists
set endnetent d_endnent
eval $inlibc

: see if endprotoent exists
set endprotoent d_endpent
eval $inlibc

: see if endpwent exists
set endpwent d_endpwent
eval $inlibc

: see if endservent exists
set endservent d_endsent
eval $inlibc

: Locate the flags for 'open()'
echo " "
$cat >open3.c <<'EOCP'
#include <sys/types.h>
#ifdef I_FCNTL
#include <fcntl.h>
#endif
#ifdef I_SYS_FILE
#include <sys/file.h>
#endif
int main() {
	if(O_RDONLY);
#ifdef O_TRUNC
	exit(0);
#else
	exit(1);
#endif
}
EOCP
: check sys/file.h first to get FREAD on Sun
if $test `./findhdr sys/file.h` && \
		set open3 -DI_SYS_FILE && eval $compile; then
	h_sysfile=true;
	echo "<sys/file.h> defines the O_* constants..." >&4
	if ./open3; then
		echo "and you have the 3 argument form of open()." >&4
		val="$define"
	else
		echo "but not the 3 argument form of open().  Oh, well." >&4
		val="$undef"
	fi
elif $test `./findhdr fcntl.h` && \
		set open3 -DI_FCNTL && eval $compile; then
	h_fcntl=true;
	echo "<fcntl.h> defines the O_* constants..." >&4
	if ./open3; then
		echo "and you have the 3 argument form of open()." >&4
		val="$define"
	else
		echo "but not the 3 argument form of open().  Oh, well." >&4
		val="$undef"
	fi
else
	val="$undef"
	echo "I can't find the O_* constant definitions!  You got problems." >&4
fi
set d_open3
eval $setvar
$rm -f open3*

: see which of string.h or strings.h is needed
echo " "
strings=`./findhdr string.h`
if $test "$strings" && $test -r "$strings"; then
	echo "Using <string.h> instead of <strings.h>." >&4
	val="$define"
else
	val="$undef"
	strings=`./findhdr strings.h`
	if $test "$strings" && $test -r "$strings"; then
		echo "Using <strings.h> instead of <string.h>." >&4
	else
		echo "No string header found -- You'll surely have problems." >&4
	fi
fi
set i_string
eval $setvar
case "$i_string" in
"$undef") strings=`./findhdr strings.h`;;
*)	  strings=`./findhdr string.h`;;
esac

: check for non-blocking I/O stuff
case "$h_sysfile" in
true) echo "#include <sys/file.h>" > head.c;;
*)
	case "$h_fcntl" in
	true) echo "#include <fcntl.h>" > head.c;;
	*) echo "#include <sys/fcntl.h>" > head.c;;
	esac
	;;
esac
echo " "
echo "Figuring out the flag used by open() for non-blocking I/O..." >&4
case "$o_nonblock" in
'')
	$cat head.c > try.c
	$cat >>try.c <<'EOCP'
#include <stdio.h>
int main() {
#ifdef O_NONBLOCK
	printf("O_NONBLOCK\n");
	exit(0);
#endif
#ifdef O_NDELAY
	printf("O_NDELAY\n");
	exit(0);
#endif
#ifdef FNDELAY
	printf("FNDELAY\n");
	exit(0);
#endif
	exit(0);
}
EOCP
	set try
	if eval $compile_ok; then
		o_nonblock=`./try`
		case "$o_nonblock" in
		'') echo "I can't figure it out, assuming O_NONBLOCK will do.";;
		*) echo "Seems like we can use $o_nonblock.";;
		esac
	else
		echo "(I can't compile the test program; pray O_NONBLOCK is right!)"
	fi
	;;
*) echo "Using $hint value $o_nonblock.";;
esac
$rm -f try try.* .out core

echo " "
echo "Let's see what value errno gets from read() on a $o_nonblock file..." >&4
case "$eagain" in
'')
	$cat head.c > try.c
	$cat >>try.c <<EOCP
#include <errno.h>
#include <sys/types.h>
#include <signal.h>
#include <stdio.h> 
#define MY_O_NONBLOCK $o_nonblock
#ifndef errno  /* XXX need better Configure test */
extern int errno;
#endif
#$i_unistd I_UNISTD
#ifdef I_UNISTD
#include <unistd.h>
#endif
#$i_string I_STRING
#ifdef I_STRING
#include <string.h>
#else
#include <strings.h>
#endif
$signal_t blech(x) int x; { exit(3); }
EOCP
	$cat >> try.c <<'EOCP'
int main()
{
	int pd[2];
	int pu[2];
	char buf[1];
	char string[100];

	pipe(pd);	/* Down: child -> parent */
	pipe(pu);	/* Up: parent -> child */
	if (0 != fork()) {
		int ret;
		close(pd[1]);	/* Parent reads from pd[0] */
		close(pu[0]);	/* Parent writes (blocking) to pu[1] */
		if (-1 == fcntl(pd[0], F_SETFL, MY_O_NONBLOCK))
			exit(1);
		signal(SIGALRM, blech);
		alarm(5);
		if ((ret = read(pd[0], buf, 1)) > 0)	/* Nothing to read! */
			exit(2);
		sprintf(string, "%d\n", ret);
		write(2, string, strlen(string));
		alarm(0);
#ifdef EAGAIN
		if (errno == EAGAIN) {
			printf("EAGAIN\n");
			goto ok;
		}
#endif
#ifdef EWOULDBLOCK
		if (errno == EWOULDBLOCK)
			printf("EWOULDBLOCK\n");
#endif
	ok:
		write(pu[1], buf, 1);	/* Unblocks child, tell it to close our pipe */
		sleep(2);				/* Give it time to close our pipe */
		alarm(5);
		ret = read(pd[0], buf, 1);	/* Should read EOF */
		alarm(0);
		sprintf(string, "%d\n", ret);
		write(3, string, strlen(string));
		exit(0);
	}

	close(pd[0]);			/* We write to pd[1] */
	close(pu[1]);			/* We read from pu[0] */
	read(pu[0], buf, 1);	/* Wait for parent to signal us we may continue */
	close(pd[1]);			/* Pipe pd is now fully closed! */
	exit(0);				/* Bye bye, thank you for playing! */
}
EOCP
	set try
	if eval $compile_ok; then
		echo "$startsh" >mtry
		echo "./try >try.out 2>try.ret 3>try.err || exit 4" >>mtry
		chmod +x mtry
		./mtry >/dev/null 2>&1
		case $? in
		0) eagain=`$cat try.out`;;
		1) echo "Could not perform non-blocking setting!";;
		2) echo "I did a successful read() for something that was not there!";;
		3) echo "Hmm... non-blocking I/O does not seem to be working!";;
		*) echo "Something terribly wrong happened during testing.";;
		esac
		rd_nodata=`$cat try.ret`
		echo "A read() system call with no data present returns $rd_nodata."
		case "$rd_nodata" in
		0|-1) ;;
		*)
			echo "(That's peculiar, fixing that to be -1.)"
			rd_nodata=-1
			;;
		esac
		case "$eagain" in
		'')
			echo "Forcing errno EAGAIN on read() with no data available."
			eagain=EAGAIN
			;;
		*)
			echo "Your read() sets errno to $eagain when no data is available."
			;;
		esac
		status=`$cat try.err`
		case "$status" in
		0) echo "And it correctly returns 0 to signal EOF.";;
		-1) echo "But it also returns -1 to signal EOF, so be careful!";;
		*) echo "However, your read() returns '$status' on EOF??";;
		esac
		val="$define"
		if test "$status" = "$rd_nodata"; then
			echo "WARNING: you can't distinguish between EOF and no data!"
			val="$undef"
		fi
	else
		echo "I can't compile the test program--assuming errno EAGAIN will do."
		eagain=EAGAIN
	fi
	set d_eofnblk
	eval $setvar
	;;
*)
	echo "Using $hint value $eagain."
	echo "Your read() returns $rd_nodata when no data is present."
	case "$d_eofnblk" in
	"$define") echo "And you can see EOF because read() returns 0.";;
	"$undef") echo "But you can't see EOF status from read() returned value.";;
	*)
		echo "(Assuming you can't see EOF status from read anyway.)"
		d_eofnblk=$undef
		;;
	esac
	;;
esac
$rm -f try try.* .out core head.c mtry

: see if fchmod exists
set fchmod d_fchmod
eval $inlibc

: see if fchown exists
set fchown d_fchown
eval $inlibc

: see if this is an fcntl system
set fcntl d_fcntl
eval $inlibc

echo " "
: See if fcntl-based locking works.
$cat >try.c <<'EOCP'
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
int main() {
#if defined(F_SETLK) && defined(F_SETLKW)
     struct flock flock;
     int retval, fd;
     fd = open("try.c", O_RDONLY);
     flock.l_type = F_RDLCK;
     flock.l_whence = SEEK_SET;
     flock.l_start = flock.l_len = 0;
     retval = fcntl(fd, F_SETLK, &flock);
     close(fd);
     (retval < 0 ? exit(2) : exit(0));
#else
     exit(2);
#endif
}
EOCP
echo "Checking if fcntl-based file locking works... "
case "$d_fcntl" in
"$define")
	set try
	if eval $compile_ok; then
		if ./try; then
			echo "Yes, it seems to work."
			val="$define"
		else
			echo "Nope, it didn't work."
			val="$undef"
		fi
	else
		echo "I'm unable to compile the test program, so I'll assume not."
		val="$undef"
	fi
	;;
*) val="$undef";
	echo "Nope, since you don't even have fcntl()."
	;;
esac
set d_fcntl_can_lock
eval $setvar
$rm -f try*


hasfield='varname=$1; struct=$2; field=$3; shift; shift; shift;
while $test $# -ge 2; do
	case "$1" in
	$define) echo "#include <$2>";;
	esac ;
    shift 2;
done > try.c;
echo "int main () { struct $struct foo; char* bar; bar = (char*)foo.$field; }" >> try.c;
set try;
if eval $compile; then
	val="$define";
else
	val="$undef";
fi;
set $varname;
eval $setvar;
$rm -f try.c try.o'

socketlib=''
sockethdr=''
: see whether socket exists
echo " "
$echo $n "Hmm... $c" >&4
if set socket val -f d_socket; eval $csym; $val; then
	echo "Looks like you have Berkeley networking support." >&4
	d_socket="$define"
	if set setsockopt val -f; eval $csym; $val; then
		d_oldsock="$undef"
	else
		echo "...but it uses the old BSD 4.1c interface, rather than 4.2." >&4
		d_oldsock="$define"
	fi
else
	if $contains socklib libc.list >/dev/null 2>&1; then
		echo "Looks like you have Berkeley networking support." >&4
		d_socket="$define"
		: we will have to assume that it supports the 4.2 BSD interface
		d_oldsock="$undef"
	else
		echo "You don't have Berkeley networking in libc$_a..." >&4
		if test "X$d_socket" = "X$define"; then
		   echo "...but you seem to believe that you have sockets." >&4
		else
			for net in net socket
			do
				if test -f /usr/lib/lib$net$_a; then
					( ($nm $nm_opt /usr/lib/lib$net$_a | eval $nm_extract) ||  \
					$ar t /usr/lib/lib$net$_a) 2>/dev/null >> libc.list
					if $contains socket libc.list >/dev/null 2>&1; then
						d_socket="$define"
						socketlib="-l$net"
						case "$net" in
						net)
							echo "...but the Wollongong group seems to have hacked it in." >&4
							sockethdr="-I/usr/netinclude"
							;;
						esac
						echo "Found Berkeley sockets interface in lib$net." >& 4 
						if $contains setsockopt libc.list >/dev/null 2>&1; then
							d_oldsock="$undef"
						else
							echo "...using the old BSD 4.1c interface, rather than 4.2." >&4
							d_oldsock="$define"
						fi
						break
					fi
				fi
			done
			if test "X$d_socket" != "X$define"; then
			   echo "or anywhere else I see." >&4
			   d_socket="$undef"
			   d_oldsock="$undef"
			fi
		fi
	fi
fi

: see if socketpair exists
set socketpair d_sockpair
eval $inlibc


echo " "
echo "Checking the availability of certain socket constants..." >& 4
for ENUM in MSG_CTRUNC MSG_DONTROUTE MSG_OOB MSG_PEEK MSG_PROXY SCM_RIGHTS; do
	enum=`$echo $ENUM|./tr '[A-Z]' '[a-z]'`
	$cat >try.c <<EOF
#include <sys/types.h>
#include <sys/socket.h>
int main() {
    int i = $ENUM;
}
EOF
	val="$undef"
	set try; if eval $compile; then
		val="$define"
	fi
	set d_${enum}; eval $setvar
	$rm -f try.c try
done

: see if sys/select.h has to be included
set sys/select.h i_sysselct
eval $inhdr

: see if we should include time.h, sys/time.h, or both
echo " "
if test "X$timeincl" = X; then
	echo "Testing to see if we should include <time.h>, <sys/time.h> or both." >&4
	$echo $n "I'm now running the test program...$c"
	$cat >try.c <<'EOCP'
#include <sys/types.h>
#ifdef I_TIME
#include <time.h>
#endif
#ifdef I_SYSTIME
#ifdef SYSTIMEKERNEL
#define KERNEL
#endif
#include <sys/time.h>
#endif
#ifdef I_SYSSELECT
#include <sys/select.h>
#endif
int main()
{
	struct tm foo;
#ifdef S_TIMEVAL
	struct timeval bar;
#endif
#ifdef S_TIMEZONE
	struct timezone tzp;
#endif
	if (foo.tm_sec == foo.tm_sec)
		exit(0);
#ifdef S_TIMEVAL
	if (bar.tv_sec == bar.tv_sec)
		exit(0);
#endif
	exit(1);
}
EOCP
	flags=''
	for s_timezone in '-DS_TIMEZONE' ''; do
	sysselect=''
	for s_timeval in '-DS_TIMEVAL' ''; do
	for i_systimek in '' '-DSYSTIMEKERNEL'; do
	for i_time in '' '-DI_TIME'; do
	for i_systime in '-DI_SYSTIME' ''; do
		case "$flags" in
		'') $echo $n ".$c"
			set try $i_time $i_systime $i_systimek $sysselect $s_timeval $s_timezone
			if eval $compile; then
				set X $i_time $i_systime $i_systimek $sysselect $s_timeval
				shift
				flags="$*"
				echo " "
				$echo $n "Succeeded with $flags$c"
			fi
			;;
		esac
	done
	done
	done
	done
	done
	timeincl=''
	echo " "
	case "$flags" in
	*SYSTIMEKERNEL*) i_systimek="$define"
		timeincl=`./findhdr sys/time.h`
		echo "We'll include <sys/time.h> with KERNEL defined." >&4;;
	*) i_systimek="$undef";;
	esac
	case "$flags" in
	*I_TIME*) i_time="$define"
		timeincl=`./findhdr time.h`" $timeincl"
		echo "We'll include <time.h>." >&4;;
	*) i_time="$undef";;
	esac
	case "$flags" in
	*I_SYSTIME*) i_systime="$define"
		timeincl=`./findhdr sys/time.h`" $timeincl"
		echo "We'll include <sys/time.h>." >&4;;
	*) i_systime="$undef";;
	esac
	$rm -f try.c try
fi

: check for fd_set items
$cat <<EOM

Checking to see how well your C compiler handles fd_set and friends ...
EOM
$cat >fd_set.c <<EOCP
#$i_systime I_SYS_TIME
#$i_sysselct I_SYS_SELECT
#$d_socket HAS_SOCKET
#include <sys/types.h>
#ifdef HAS_SOCKET
#include <sys/socket.h> /* Might include <sys/bsdtypes.h> */
#endif
#ifdef I_SYS_TIME
#include <sys/time.h>
#endif
#ifdef I_SYS_SELECT
#include <sys/select.h>
#endif
int main() {
	fd_set fds;

#ifdef TRYBITS
	if(fds.fds_bits);
#endif

#if defined(FD_SET) && defined(FD_CLR) && defined(FD_ISSET) && defined(FD_ZERO)
	exit(0);
#else
	exit(1);
#endif
}
EOCP
set fd_set -DTRYBITS
if eval $compile; then
	d_fds_bits="$define"
	d_fd_set="$define"
	echo "Well, your system knows about the normal fd_set typedef..." >&4
	if ./fd_set; then
		echo "and you have the normal fd_set macros (just as I'd expect)." >&4
		d_fd_macros="$define"
	else
		$cat >&4 <<'EOM'
but not the normal fd_set macros!  Gaaack!  I'll have to cover for you.
EOM
		d_fd_macros="$undef"
	fi
else
	$cat <<'EOM'
Hmm, your compiler has some difficulty with fd_set.  Checking further...
EOM
	set fd_set
	if eval $compile; then
		d_fds_bits="$undef"
		d_fd_set="$define"
		echo "Well, your system has some sort of fd_set available..." >&4
		if ./fd_set; then
			echo "and you have the normal fd_set macros." >&4
			d_fd_macros="$define"
		else
			$cat <<'EOM'
but not the normal fd_set macros!  Gross!  More work for me...
EOM
			d_fd_macros="$undef"
		fi
	else
	echo "Well, you got zip.  That's OK, I can roll my own fd_set stuff." >&4
		d_fd_set="$undef"
		d_fds_bits="$undef"
		d_fd_macros="$undef"
	fi
fi
$rm -f fd_set*

: see if fgetpos exists
set fgetpos d_fgetpos
eval $inlibc

: see if flock exists
set flock d_flock
eval $inlibc

: see if fork exists
set fork d_fork
eval $inlibc

: see if pathconf exists
set pathconf d_pathconf
eval $inlibc

: see if fpathconf exists
set fpathconf d_fpathconf
eval $inlibc


: check for fpos64_t
echo " "
echo "Checking to see if you have fpos64_t..." >&4
$cat >try.c <<EOCP
#include <stdio.h>
int main() { fpos64_t x = 7; }
EOCP
set try
if eval $compile; then
	val="$define"
	echo "You have fpos64_t."
else
	val="$undef"
	echo "You do not have fpos64_t."
	case "$fpossize" in
	8) echo "(Your fpos_t is 64 bits, so you could use that.)" ;;
	esac
fi
$rm -f try.* try
set d_fpos64_t
eval $setvar

: see if frexpl exists
set frexpl d_frexpl
eval $inlibc

hasstruct='varname=$1; struct=$2; shift; shift;
while $test $# -ge 2; do
	case "$1" in
	$define) echo "#include <$2>";;
	esac ;
    shift 2;
done > try.c;
echo "int main () { struct $struct foo; }" >> try.c;
set try;
if eval $compile; then
	val="$define";
else
	val="$undef";
fi;
set $varname;
eval $setvar;
$rm -f try.c try.o'

: see if this is a sys/param system
set sys/param.h i_sysparam
eval $inhdr

: see if this is a sys/mount.h system
set sys/mount.h i_sysmount
eval $inhdr

: see if sys/types.h has to be included
set sys/types.h i_systypes
eval $inhdr


echo " "
echo "Checking to see if your system supports struct fs_data..." >&4
set d_fs_data_s fs_data $i_systypes sys/types.h $i_sysparam sys/param.h $i_sysmount sys/mount.h
eval $hasstruct
case "$d_fs_data_s" in
"$define")      echo "Yes, it does."   ;;
*)              echo "No, it doesn't." ;;
esac

: see if fseeko exists
set fseeko d_fseeko
eval $inlibc
case "$longsize" in
8) echo "(Your long is 64 bits, so you could use fseek.)" ;;
esac

: see if fsetpos exists
set fsetpos d_fsetpos
eval $inlibc


: see if fstatfs exists
set fstatfs d_fstatfs
eval $inlibc


: see if statvfs exists
set statvfs d_statvfs
eval $inlibc

: see if fstatvfs exists
set fstatvfs d_fstatvfs
eval $inlibc


: see if fsync exists
set fsync d_fsync
eval $inlibc

: see if ftello exists
set ftello d_ftello
eval $inlibc
case "$longsize" in
8) echo "(Your long is 64 bits, so you could use ftell.)" ;;
esac

: see if getcwd exists
set getcwd d_getcwd
eval $inlibc

: see if getespwnam exists
set getespwnam d_getespwnam
eval $inlibc


: see if getfsstat exists
set getfsstat d_getfsstat
eval $inlibc

: see if getgrent exists
set getgrent d_getgrent
eval $inlibc

: see if gethostbyaddr exists
set gethostbyaddr d_gethbyaddr
eval $inlibc

: see if gethostbyname exists
set gethostbyname d_gethbyname
eval $inlibc

: see if gethostent exists
set gethostent d_gethent
eval $inlibc

: see how we will look up host name
echo " "
call=''
if set gethostname val -f d_gethname; eval $csym; $val; then
	echo 'gethostname() found.' >&4
	d_gethname="$define"
	call=gethostname
fi
if set uname val -f d_uname; eval $csym; $val; then
	if ./xenix; then
		$cat <<'EOM'
uname() was found, but you're running xenix, and older versions of xenix
have a broken uname(). If you don't really know whether your xenix is old
enough to have a broken system call, use the default answer.

EOM
		dflt=y
		case "$d_uname" in
		"$define") dflt=n;;
		esac
		rp='Is your uname() broken?'
		. ./myread
		case "$ans" in
		n*) d_uname="$define"; call=uname;;
		esac
	else
		echo 'uname() found.' >&4
		d_uname="$define"
		case "$call" in
		'') call=uname ;;
		esac
	fi
fi
case "$d_gethname" in
'') d_gethname="$undef";;
esac
case "$d_uname" in
'') d_uname="$undef";;
esac
case "$d_uname$d_gethname" in
*define*)
	dflt=n
	cat <<EOM
 
Every now and then someone has a $call() that lies about the hostname
but can't be fixed for political or economic reasons.  If you wish, I can
pretend $call() isn't there and maybe compute hostname at run-time
thanks to the '$phostname' command.

EOM
	rp="Shall I ignore $call() from now on?"
	. ./myread
	case "$ans" in
	y*) d_uname="$undef" d_gethname="$undef"; $echo $n "Okay...$c";;
	esac;;
esac
case "$phostname" in
'') aphostname='';;
*) case "$aphostname" in
	/*) ;;
	*) set X $phostname
		shift
		file=$1
		shift
		file=`./loc $file $file $pth`
		aphostname=`echo $file $*`
		;;
	esac
	;;
esac
case "$d_uname$d_gethname" in
*define*) ;;
*)
	case "$phostname" in
	'')
		echo "There will be no way for $package to get your hostname." >&4;;
	*)
	echo "I'll use 'popen("'"'$aphostname'", "r")'"' to get your hostname." >&4
		;;
	esac;;
esac
case "$d_phostname" in
'') d_phostname="$undef";;
esac

: see if this is a netdb.h system
set netdb.h i_netdb
eval $inhdr

: see if prototypes for various gethostxxx netdb.h functions are available
echo " "
set d_gethostprotos gethostent $i_netdb netdb.h
eval $hasproto

: see if getlogin exists
set getlogin d_getlogin
eval $inlibc

: see if getmnt exists
set getmnt d_getmnt
eval $inlibc

: see if getmntent exists
set getmntent d_getmntent
eval $inlibc

: see if getnetbyaddr exists
set getnetbyaddr d_getnbyaddr
eval $inlibc

: see if getnetbyname exists
set getnetbyname d_getnbyname
eval $inlibc

: see if getnetent exists
set getnetent d_getnent
eval $inlibc

: see if prototypes for various getnetxxx netdb.h functions are available
echo " "
set d_getnetprotos getnetent $i_netdb netdb.h
eval $hasproto

: see if getpagesize exists
set getpagesize d_getpagsz
eval $inlibc


: see if getprotobyname exists
set getprotobyname d_getpbyname
eval $inlibc

: see if getprotobynumber exists
set getprotobynumber d_getpbynumber
eval $inlibc

: see if getprotoent exists
set getprotoent d_getpent
eval $inlibc

: see if getpgid exists
set getpgid d_getpgid
eval $inlibc

: see if getpgrp2 exists
set getpgrp2 d_getpgrp2
eval $inlibc

: see if getppid exists
set getppid d_getppid
eval $inlibc

: see if getpriority exists
set getpriority d_getprior
eval $inlibc

: see if prototypes for various getprotoxxx netdb.h functions are available
echo " "
set d_getprotoprotos getprotoent $i_netdb netdb.h
eval $hasproto

: see if getprpwnam exists
set getprpwnam d_getprpwnam
eval $inlibc

: see if getpwent exists
set getpwent d_getpwent
eval $inlibc


: see if getservbyname exists
set getservbyname d_getsbyname
eval $inlibc

: see if getservbyport exists
set getservbyport d_getsbyport
eval $inlibc

: see if getservent exists
set getservent d_getsent
eval $inlibc

: see if prototypes for various getservxxx netdb.h functions are available
echo " "
set d_getservprotos getservent $i_netdb netdb.h
eval $hasproto

: see if getspnam exists
set getspnam d_getspnam
eval $inlibc

: see if gettimeofday or ftime exists
set gettimeofday d_gettimeod
eval $inlibc
case "$d_gettimeod" in
"$undef")
	set ftime d_ftime 
	eval $inlibc
	;;
*)
	val="$undef"; set d_ftime; eval $setvar
	;;
esac
case "$d_gettimeod$d_ftime" in
"$undef$undef")
	echo " "
	echo 'No ftime() nor gettimeofday() -- timing may be less accurate.' >&4
	;;
esac

: see if this is an grp system
set grp.h i_grp
eval $inhdr

case "$i_grp" in
$define)
	xxx=`./findhdr grp.h`
	$cppstdin $cppflags $cppminus < $xxx >$$.h

	if $contains 'gr_passwd' $$.h >/dev/null 2>&1; then
		val="$define"
	else
		val="$undef"
	fi
	set d_grpasswd
	eval $setvar

	$rm -f $$.h
	;;
*)
	val="$undef";
	set d_grpasswd; eval $setvar
	;;
esac

: see if hasmntopt exists
set hasmntopt d_hasmntopt
eval $inlibc

: see if this is a netinet/in.h or sys/in.h system
set netinet/in.h i_niin sys/in.h i_sysin
eval $inhdr

: see if arpa/inet.h has to be included
set arpa/inet.h i_arpainet
eval $inhdr

: see if htonl --and friends-- exists
val=''
set htonl val
eval $inlibc

: Maybe they are macros.
case "$val" in
$undef)
	$cat >htonl.c <<EOM
#include <stdio.h>
#include <sys/types.h>
#$i_niin I_NETINET_IN
#$i_sysin I_SYS_IN
#$i_arpainet I_ARPA_INET
#ifdef I_NETINET_IN
#include <netinet/in.h>
#endif
#ifdef I_SYS_IN
#include <sys/in.h>
#endif
#ifdef I_ARPA_INET
#include <arpa/inet.h>
#endif
#ifdef htonl
printf("Defined as a macro.");
#endif
EOM
	$cppstdin $cppflags $cppminus < htonl.c >htonl.E 2>/dev/null
	if $contains 'Defined as a macro' htonl.E >/dev/null 2>&1; then
		val="$define"
		echo "But it seems to be defined as a macro." >&4
	fi
	$rm -f htonl.?
	;;
esac
set d_htonl
eval $setvar

: see if iconv exists
set iconv d_iconv
eval $inlibc

: index or strchr
echo " "
if set index val -f; eval $csym; $val; then
	if set strchr val -f d_strchr; eval $csym; $val; then
		if $contains strchr "$strings" >/dev/null 2>&1 ; then
			val="$define"
			vali="$undef"
			echo "strchr() found." >&4
		else
			val="$undef"
			vali="$define"
			echo "index() found." >&4
		fi
	else
		val="$undef"
		vali="$define"
		echo "index() found." >&4
	fi
else
	if set strchr val -f d_strchr; eval $csym; $val; then
		val="$define"
		vali="$undef"
		echo "strchr() found." >&4
	else
		echo "No index() or strchr() found!" >&4
		val="$undef"
		vali="$undef"
	fi
fi
set d_strchr; eval $setvar
val="$vali"
set d_index; eval $setvar

: check whether inet_aton exists
set inet_aton d_inetaton
eval $inlibc

: see if inttypes.h is available
: we want a real compile instead of Inhdr because some systems
: have an inttypes.h which includes non-existent headers
echo " "
$cat >try.c <<EOCP
#include <inttypes.h>
int main() {
	static int32_t foo32 = 0x12345678;
}
EOCP
set try
if eval $compile; then
	echo "<inttypes.h> found." >&4
	val="$define"
else
	echo "<inttypes.h> NOT found." >&4
	val="$undef"
fi
$rm -f try.c try
set i_inttypes
eval $setvar

: check for int64_t
echo " "
echo "Checking to see if you have int64_t..." >&4
$cat >try.c <<EOCP
#include <sys/types.h>
#$i_inttypes I_INTTYPES
#ifdef I_INTTYPES
#include <inttypes.h>
#endif
int main() { int64_t x = 7; }
EOCP
set try
if eval $compile; then
	val="$define"
	echo "You have int64_t."
else
	val="$undef"
	echo "You do not have int64_t."
fi
$rm -f try try.*
set d_int64_t
eval $setvar

: Look for isascii
echo " "
$cat >isascii.c <<'EOCP'
#include <stdio.h>
#include <ctype.h>
int main() {
	int c = 'A';
	if (isascii(c))
		exit(0);
	else
		exit(1);
}
EOCP
set isascii
if eval $compile; then
	echo "isascii() found." >&4
	val="$define"
else
	echo "isascii() NOT found." >&4
	val="$undef"
fi
set d_isascii
eval $setvar
$rm -f isascii*

: see if isnan exists
set isnan d_isnan
eval $inlibc

: see if isnanl exists
set isnanl d_isnanl
eval $inlibc

: see if killpg exists
set killpg d_killpg
eval $inlibc

: see if lchown exists
echo " "
$cat > try.c <<'EOCP'
/* System header to define __stub macros and hopefully few prototypes,
    which can conflict with char lchown(); below.  */
#include <assert.h>
/* Override any gcc2 internal prototype to avoid an error.  */
/* We use char because int might match the return type of a gcc2
   builtin and then its argument prototype would still apply.  */
char lchown();
int main() {
    /*  The GNU C library defines this for functions which it implements
        to always fail with ENOSYS.  Some functions are actually named
	something starting with __ and the normal name is an alias.  */
#if defined (__stub_lchown) || defined (__stub___lchown)
choke me
#else
lchown();
#endif
; return 0; }
EOCP
set try
if eval $compile; then
    $echo "lchown() found." >&4
    val="$define"
else
    $echo "lchown() NOT found." >&4
    val="$undef"
fi
set d_lchown
eval $setvar

: See if number of significant digits in a double precision number is known
echo " "
$cat >ldbl_dig.c <<EOM
#$i_limits I_LIMITS
#$i_float I_FLOAT
#ifdef I_LIMITS
#include <limits.h>
#endif
#ifdef I_FLOAT
#include <float.h>
#endif
#ifdef LDBL_DIG
printf("Contains LDBL_DIG");
#endif
EOM
$cppstdin $cppflags $cppminus < ldbl_dig.c >ldbl_dig.E 2>/dev/null
if $contains 'LDBL_DIG' ldbl_dig.E >/dev/null 2>&1; then
	echo "LDBL_DIG found." >&4
	val="$define"
else
	echo "LDBL_DIG NOT found." >&4
	val="$undef"
fi
$rm -f ldbl_dig.?
set d_ldbl_dig
eval $setvar

: see if link exists
set link d_link
eval $inlibc

: see if localeconv exists
set localeconv d_locconv
eval $inlibc

: see if lockf exists
set lockf d_lockf
eval $inlibc

: check for long long
echo " "
echo "Checking to see if you have long long..." >&4
echo 'int main() { long long x = 7; return 0; }' > try.c
set try
if eval $compile; then
	val="$define"
	echo "You have long long."
else
	val="$undef"
	echo "You do not have long long."
fi
$rm try.*
set d_longlong
eval $setvar

: check for length of long long
case "${d_longlong}${longlongsize}" in
$define)
	echo " "
	echo "Checking to see how big your long longs are..." >&4
	$cat >try.c <<'EOCP'
#include <stdio.h>
int main()
{
    printf("%d\n", (int)sizeof(long long));
    return(0);
}
EOCP
	set try
	if eval $compile_ok; then
		longlongsize=`./try$exe_ext`
		echo "Your long longs are $longlongsize bytes long."
	else
		dflt='8'
		echo " "
		echo "(I can't seem to compile the test program.  Guessing...)"
		rp="What is the size of a long long (in bytes)?"
		. ./myread
		longlongsize="$ans"
	fi
	if $test "X$longsize" = "X$longlongsize"; then
		echo "(That isn't any different from an ordinary long.)"
	fi	
	;;
esac
$rm -f try.* try

: see if prototype for lseek is available
echo " "
set d_lseekproto lseek $i_systypes sys/types.h $i_unistd unistd.h
eval $hasproto

: see if lstat exists
set lstat d_lstat
eval $inlibc

: see if madvise exists
set madvise d_madvise
eval $inlibc

: see if mblen exists
set mblen d_mblen
eval $inlibc

: see if mbstowcs exists
set mbstowcs d_mbstowcs
eval $inlibc

: see if mbtowc exists
set mbtowc d_mbtowc
eval $inlibc

: see if memchr exists
set memchr d_memchr
eval $inlibc

: see if memcmp exists
set memcmp d_memcmp
eval $inlibc

: see if memcpy exists
set memcpy d_memcpy
eval $inlibc

: see if memmove exists
set memmove d_memmove
eval $inlibc

: see if memset exists
set memset d_memset
eval $inlibc

: see if mkdir exists
set mkdir d_mkdir
eval $inlibc

: see if mkdtemp exists
set mkdtemp d_mkdtemp
eval $inlibc

: see if mkfifo exists
set mkfifo d_mkfifo
eval $inlibc

: see if mkstemp exists
set mkstemp d_mkstemp
eval $inlibc

: see if mkstemps exists
set mkstemps d_mkstemps
eval $inlibc

: see if mktime exists
set mktime d_mktime
eval $inlibc

: see if this is a sys/mman.h system
set sys/mman.h i_sysmman
eval $inhdr

: see if mmap exists
set mmap d_mmap
eval $inlibc
: see what shmat returns
: default to something harmless
mmaptype='void *'
case "$i_sysmman$d_mmap" in
"$define$define")
	$cat >mmap.c <<'END'
#include <sys/mman.h>
void *mmap();
END
	if $cc $ccflags -c mmap.c >/dev/null 2>&1; then
		mmaptype='void *'
	else
		mmaptype='caddr_t'
	fi
	echo "and it returns ($mmaptype)." >&4
	;;
esac



: see if modfl exists
set modfl d_modfl
eval $inlibc

: see if mprotect exists
set mprotect d_mprotect
eval $inlibc

: see if msgctl exists
set msgctl d_msgctl
eval $inlibc

: see if msgget exists
set msgget d_msgget
eval $inlibc

: see if msgsnd exists
set msgsnd d_msgsnd
eval $inlibc

: see if msgrcv exists
set msgrcv d_msgrcv
eval $inlibc

: see how much of the 'msg*(2)' library is present.
h_msg=true
echo " "
case "$d_msgctl$d_msgget$d_msgsnd$d_msgrcv" in
*"$undef"*) h_msg=false;;
esac
case "$osname" in
freebsd)
    case "`ipcs 2>&1`" in
    "SVID messages"*"not configured"*)
	echo "Your $osname does not have the msg*(2) configured." >&4
        h_msg=false
	val="$undef"
	set msgctl d_msgctl
	eval $setvar
	set msgget d_msgget
	eval $setvar
	set msgsnd d_msgsnd
	eval $setvar
	set msgrcv d_msgrcv
	eval $setvar
	;;
    esac
    ;;
esac
: we could also check for sys/ipc.h ...
if $h_msg && $test `./findhdr sys/msg.h`; then
	echo "You have the full msg*(2) library." >&4
	val="$define"
else
	echo "You don't have the full msg*(2) library." >&4
	val="$undef"
fi
set d_msg
eval $setvar

: see if msync exists
set msync d_msync
eval $inlibc

: see if munmap exists
set munmap d_munmap
eval $inlibc

: see if nice exists
set nice d_nice
eval $inlibc


echo " "
echo "Checking which 64-bit integer type we could use..." >&4

case "$intsize" in
8) val=int
   set quadtype
   eval $setvar
   val='"unsigned int"'
   set uquadtype
   eval $setvar
   quadkind=1
   ;;
*) case "$longsize" in
   8) val=long
      set quadtype
      eval $setvar
      val='"unsigned long"'
      set uquadtype
      eval $setvar
      quadkind=2
      ;;
   *) case "$d_longlong:$longlongsize" in
      define:8)
        val='"long long"'
        set quadtype
        eval $setvar
        val='"unsigned long long"'
        set uquadtype
        eval $setvar
        quadkind=3
        ;;
      *) case "$d_int64_t" in
         define)
           val=int64_t
           set quadtype
           eval $setvar
           val=uint64_t
           set uquadtype
           eval $setvar
           quadkind=4
           ;;
         esac
         ;;
      esac
      ;;
   esac
   ;;
esac

case "$quadtype" in
'')	echo "Alas, no 64-bit integer types in sight." >&4
	d_quad="$undef"
	;;
*)	if test X"$use64bitint" = Xdefine -o X"$longsize" = X8; then
	    verb="will"
	else
	    verb="could"
	fi
	echo "We $verb use '$quadtype' for 64-bit integers." >&4
	d_quad="$define"
	;;
esac

: check for length of character
echo " "
case "$charsize" in
'')
	echo "Checking to see how big your characters are (hey, you never know)..." >&4
	$cat >try.c <<'EOCP'
#include <stdio.h>
int main()
{
    printf("%d\n", (int)sizeof(char));
    exit(0);
}
EOCP
	set try
	if eval $compile_ok; then
		dflt=`./try`
	else
		dflt='1'
		echo "(I can't seem to compile the test program.  Guessing...)"
	fi
	;;
*)
	dflt="$charsize"
	;;
esac
rp="What is the size of a character (in bytes)?"
. ./myread
charsize="$ans"
$rm -f try.c try

: check for volatile keyword
echo " "
echo 'Checking to see if your C compiler knows about "volatile"...' >&4
$cat >try.c <<'EOCP'
int main()
{
	typedef struct _goo_struct goo_struct;
	goo_struct * volatile goo = ((goo_struct *)0);
	struct _goo_struct {
		long long_int;
		int reg_int;
		char char_var;
	};
	typedef unsigned short foo_t;
	char *volatile foo;
	volatile int bar;
	volatile foo_t blech;
	foo = foo;
}
EOCP
if $cc -c $ccflags try.c >/dev/null 2>&1 ; then
	val="$define"
	echo "Yup, it does."
else
	val="$undef"
	echo "Nope, it doesn't."
fi
set d_volatile
eval $setvar
$rm -f try.*


echo " "
$echo "Choosing the C types to be used for Perl's internal types..." >&4

case "$use64bitint:$d_quad:$quadtype" in
define:define:?*)
	ivtype="$quadtype"
	uvtype="$uquadtype"
	ivsize=8
	uvsize=8
	;;
*)	ivtype="long"
	uvtype="unsigned long"
	ivsize=$longsize
	uvsize=$longsize
	;;
esac

case "$uselongdouble:$d_longdbl" in
define:define)
	nvtype="long double"
	nvsize=$longdblsize
	;;
*)	nvtype=double
	nvsize=$doublesize
	;;
esac

$echo "(IV will be "$ivtype", $ivsize bytes)"
$echo "(UV will be "$uvtype", $uvsize bytes)"
$echo "(NV will be "$nvtype", $nvsize bytes)"

$cat >try.c <<EOCP
#$i_inttypes I_INTTYPES
#ifdef I_INTTYPES
#include <inttypes.h>
#endif
#include <stdio.h>
int main() {
#ifdef INT8
   int8_t i =  INT8_MAX;
  uint8_t u = UINT8_MAX;
  printf("int8_t\n");
#endif
#ifdef INT16
   int16_t i =  INT16_MAX;
  uint16_t i = UINT16_MAX;
  printf("int16_t\n");
#endif
#ifdef INT32
   int32_t i =  INT32_MAX;
  uint32_t u = UINT32_MAX;
  printf("int32_t\n");
#endif
}
EOCP

case "$i8type" in
'')	case "$charsize" in
	1)	i8type=char
		u8type="unsigned char"
		i8size=$charsize
		u8size=$charsize
		;;
	esac
	;;
esac
case "$i8type" in
'')	set try -DINT8
	if eval $compile; then
		case "`./try$exe_ext`" in
		int8_t)	i8type=int8_t
			u8type=uint8_t
			i8size=1
			u8size=1
			;;
		esac
	fi
	;;
esac
case "$i8type" in
'')	if $test $charsize -ge 1; then
		i8type=char
		u8type="unsigned char"
		i8size=$charsize
		u8size=$charsize
	fi
	;;
esac

case "$i16type" in
'')	case "$shortsize" in
	2)	i16type=short
		u16type="unsigned short"
		i16size=$shortsize
		u16size=$shortsize
		;;
	esac
	;;
esac
case "$i16type" in
'')	set try -DINT16
	if eval $compile; then
		case "`./try$exe_ext`" in
		int16_t)
			i16type=int16_t
			u16type=uint16_t
			i16size=2
			u16size=2
			;;
		esac
	fi
	;;
esac
case "$i16type" in
'')	if $test $shortsize -ge 2; then
		i16type=short
		u16type="unsigned short"
		i16size=$shortsize
		u16size=$shortsize
	fi
	;;
esac

case "$i32type" in
'')	case "$longsize" in
	4)	i32type=long
		u32type="unsigned long"
		i32size=$longsize
		u32size=$longsize
		;;
	*)	case "$intsize" in
		4)	i32type=int
			u32type="unsigned int"
			i32size=$intsize
			u32size=$intsize
			;;
		esac
		;;
	esac
	;;
esac
case "$i32type" in
'')	set try -DINT32
	if eval $compile; then
		case "`./try$exe_ext`" in
		int32_t)
			i32type=int32_t
			u32type=uint32_t
			i32size=4
			u32size=4
			;;
		esac
	fi
	;;
esac
case "$i32type" in
'')	if $test $intsize -ge 4; then
		i32type=int
		u32type="unsigned int"
		i32size=$intsize
		u32size=$intsize
	fi
	;;
esac

case "$i64type" in
'')	case "$d_quad:$quadtype" in
	define:?*)
		i64type="$quadtype"
		u64type="$uquadtype"
		i64size=8
		u64size=8
		;;
	esac
	;;
esac

$echo "Checking how many bits of your UVs your NVs can preserve..." >&4
: volatile so that the compiler has to store it out to memory.
if test X"$d_volatile" = X"$define"; then
	volatile=volatile
fi
$cat <<EOP >try.c
#include <stdio.h>
#include <sys/types.h>
#include <signal.h>
#ifdef SIGFPE
$volatile int bletched = 0;
$signal_t blech(s) int s; { bletched = 1; }
#endif
int main() {
    $uvtype u = 0;
    $nvtype d;
    int     n = 8 * $uvsize;
    int     i;
#ifdef SIGFPE
    signal(SIGFPE, blech);
#endif

    for (i = 0; i < n; i++) {
      u = u << 1 | ($uvtype)1;
      d = ($nvtype)u;
      if (($uvtype)d != u)
        break;
      if (d <= 0)
	break;
      d = ($nvtype)(u - 1);
      if (($uvtype)d != (u - 1))
        break;
#ifdef SIGFPE
      if (bletched) {
	break;
#endif
      }	
    }
    printf("%d\n", ((i == n) ? -n : i));
    exit(0);
}
EOP
set try

d_nv_preserves_uv="$undef"
if eval $compile; then
	d_nv_preserves_uv_bits="`./try$exe_ext`"
fi
case "$d_nv_preserves_uv_bits" in
\-[1-9]*)	
	d_nv_preserves_uv_bits=`expr 0 - $d_nv_preserves_uv_bits`
	$echo "Your NVs can preserve all $d_nv_preserves_uv_bits bits of your UVs."  2>&1
	d_nv_preserves_uv="$define"
	;;
[1-9]*)	$echo "Your NVs can preserve only $d_nv_preserves_uv_bits bits of your UVs."  2>&1
	d_nv_preserves_uv="$undef" ;;
*)	$echo "Can't figure out how many bits your NVs preserve." 2>&1
	d_nv_preserves_uv_bits="$undef" ;;
esac

$rm -f try.* try


: check for off64_t
echo " "
echo "Checking to see if you have off64_t..." >&4
$cat >try.c <<EOCP
#include <sys/types.h>
#include <unistd.h>
int main() { off64_t x = 7; }
EOCP
set try
if eval $compile; then
	val="$define"
	echo "You have off64_t."
else
	val="$undef"
	echo "You do not have off64_t."
	case "$lseeksize" in
	8) echo "(Your off_t is 64 bits, so you could use that.)" ;;
	esac
fi
$rm -f try.* try
set d_off64_t
eval $setvar

: see if POSIX threads are available
set pthread.h i_pthread
eval $inhdr




: how to create joinable pthreads
if test "X$usethreads" = "X$define" -a "X$i_pthread" = "X$define"; then
	echo " "
	echo "Checking what constant to use for creating joinable pthreads..." >&4 
	$cat >try.c <<'EOCP'
#include <pthread.h>
int main() {
    int detachstate = JOINABLE;
}
EOCP
	set try -DJOINABLE=PTHREAD_CREATE_JOINABLE
	if eval $compile; then
		echo "You seem to use PTHREAD_CREATE_JOINABLE." >&4
		val="$undef" # Yes, undef.
		set d_old_pthread_create_joinable
		eval $setvar
		val=""
		set old_pthread_create_joinable
		eval $setvar
	else
		set try -DJOINABLE=PTHREAD_CREATE_UNDETACHED
		if eval $compile; then
			echo "You seem to use PTHREAD_CREATE_UNDETACHED." >&4
			val="$define"
			set d_old_pthread_create_joinable
			eval $setvar
			val=PTHREAD_CREATE_UNDETACHED
			set old_pthread_create_joinable
			eval $setvar
		else		
			set try -DJOINABLE=__UNDETACHED
			if eval $compile; then
				echo "You seem to use __UNDETACHED." >&4
				val="$define"
				set d_old_pthread_create_joinable
				eval $setvar
				val=__UNDETACHED
				set old_pthread_create_joinable
				eval $setvar
			else
				echo "Egads, nothing obvious found.  Guessing that you use 0." >&4
				val="$define"
				set d_old_pthread_create_joinable
				eval $setvar
				val=0
				set old_pthread_create_joinable
				eval $setvar
			fi
		fi
	fi
	$rm -f try try.*
else
    d_old_pthread_create_joinable="$undef"
    old_pthread_create_joinable=""
fi

: see if pause exists
set pause d_pause
eval $inlibc

: see if pipe exists
set pipe d_pipe
eval $inlibc

: see if poll exists
set poll d_poll
eval $inlibc


: see whether the various POSIXish _yields exist
$cat >try.c <<EOP
#include <pthread.h>
#include <stdio.h>
int main() {
#ifdef SCHED_YIELD
	sched_yield();
#else
#ifdef PTHREAD_YIELD
	pthread_yield();
#else
#ifdef PTHREAD_YIELD_NULL
	pthread_yield(NULL);
#endif
#endif
#endif
}
EOP
: see if sched_yield exists
set try -DSCHED_YIELD
if eval $compile; then
    val="$define"
    sched_yield='sched_yield()'
else
    val="$undef"
fi
case "$usethreads" in
$define)
	case "$val" in
	$define) echo 'sched_yield() found.' >&4	;;
	*)	 echo 'sched_yield() NOT found.' >&4	;;
	esac
esac
set d_sched_yield
eval $setvar

: see if pthread_yield exists
set try -DPTHREAD_YIELD
if eval $compile; then
    val="$define"
    case "$sched_yield" in
    '') sched_yield='pthread_yield()' ;;
    esac
else
    set try -DPTHREAD_YIELD_NULL
    if eval $compile; then
	val="$define"
	case "$sched_yield" in
	'') sched_yield='pthread_yield(NULL)' ;;
	esac
    else
	val="$undef"
    fi
fi
case "$usethreads" in
$define)
	case "$val" in
	$define) echo 'pthread_yield() found.' >&4	;;
	*)	 echo 'pthread_yield() NOT found.' >&4	;;
	esac
	;;
esac
set d_pthread_yield
eval $setvar

case "$sched_yield" in
'') sched_yield=undef ;;
esac

$rm -f try try.*

: see if this is a pwd.h system
set pwd.h i_pwd
eval $inhdr

case "$i_pwd" in
$define)
	xxx=`./findhdr pwd.h`
	$cppstdin $cppflags $cppminus < $xxx >$$.h

	if $contains 'pw_quota' $$.h >/dev/null 2>&1; then
		val="$define"
	else
		val="$undef"
	fi
	set d_pwquota
	eval $setvar

	if $contains 'pw_age' $$.h >/dev/null 2>&1; then
		val="$define"
	else
		val="$undef"
	fi
	set d_pwage
	eval $setvar

	if $contains 'pw_change' $$.h >/dev/null 2>&1; then
		val="$define"
	else
		val="$undef"
	fi
	set d_pwchange
	eval $setvar

	if $contains 'pw_class' $$.h >/dev/null 2>&1; then
		val="$define"
	else
		val="$undef"
	fi
	set d_pwclass
	eval $setvar

	if $contains 'pw_expire' $$.h >/dev/null 2>&1; then
		val="$define"
	else
		val="$undef"
	fi
	set d_pwexpire
	eval $setvar

	if $contains 'pw_comment' $$.h >/dev/null 2>&1; then
		val="$define"
	else
		val="$undef"
	fi
	set d_pwcomment
	eval $setvar

	if $contains 'pw_gecos' $$.h >/dev/null 2>&1; then
		val="$define"
	else
		val="$undef"
	fi
	set d_pwgecos
	eval $setvar

	if $contains 'pw_passwd' $$.h >/dev/null 2>&1; then
		val="$define"
	else
		val="$undef"
	fi
	set d_pwpasswd
	eval $setvar

	$rm -f $$.h
	;;
*)
	val="$undef"; 
	set d_pwquota; eval $setvar
	set d_pwage; eval $setvar
	set d_pwchange; eval $setvar
	set d_pwclass; eval $setvar
	set d_pwexpire; eval $setvar
	set d_pwcomment; eval $setvar
	set d_pwgecos; eval $setvar
	set d_pwpasswd; eval $setvar
	;;
esac

: see if readdir and friends exist
set readdir d_readdir
eval $inlibc
set seekdir d_seekdir
eval $inlibc
set telldir d_telldir
eval $inlibc
set rewinddir d_rewinddir
eval $inlibc

: see if readlink exists
set readlink d_readlink
eval $inlibc

: see if rename exists
set rename d_rename
eval $inlibc

: see if rmdir exists
set rmdir d_rmdir
eval $inlibc

: see if memory.h is available.
val=''
set memory.h val
eval $inhdr

: See if it conflicts with string.h
case "$val" in
$define)
	case "$strings" in
	'') ;;
	*)
		$cppstdin $cppflags $cppminus < $strings > mem.h
		if $contains 'memcpy' mem.h >/dev/null 2>&1; then
			echo " "
			echo "We won't be including <memory.h>."
			val="$undef"
		fi
		$rm -f mem.h
		;;
	esac
esac
set i_memory
eval $setvar

: can bcopy handle overlapping blocks?
val="$undef"
case "$d_bcopy" in
"$define")
	echo " "
	echo "Checking to see if your bcopy() can do overlapping copies..." >&4
	$cat >try.c <<EOCP
#$i_memory I_MEMORY
#$i_stdlib I_STDLIB
#$i_string I_STRING
#$i_unistd I_UNISTD
EOCP
	$cat >>try.c <<'EOCP'
#include <stdio.h>
#ifdef I_MEMORY
#  include <memory.h>
#endif
#ifdef I_STDLIB
#  include <stdlib.h>
#endif
#ifdef I_STRING
#  include <string.h>
#else
#  include <strings.h>
#endif
#ifdef I_UNISTD
#  include <unistd.h>  /* Needed for NetBSD */
#endif
int main()
{
char buf[128], abc[128];
char *b;
int len;
int off;
int align;

bcopy("abcdefghijklmnopqrstuvwxyz0123456789", abc, 36);

for (align = 7; align >= 0; align--) {
	for (len = 36; len; len--) {
		b = buf+align;
		bcopy(abc, b, len);
		for (off = 1; off <= len; off++) {
			bcopy(b, b+off, len);
			bcopy(b+off, b, len);
			if (bcmp(b, abc, len))
				exit(1);
		}
	}
}
exit(0);
}
EOCP
	set try
	if eval $compile_ok; then
		if ./try 2>/dev/null; then
			echo "Yes, it can."
			val="$define"
		else
			echo "It can't, sorry."
			case "$d_memmove" in
			"$define") echo "But that's Ok since you have memmove()." ;;
			esac
		fi
	else
		echo "(I can't compile the test program, so we'll assume not...)"
		case "$d_memmove" in
		"$define") echo "But that's Ok since you have memmove()." ;;
		esac
	fi
	;;
esac
$rm -f try.* try core
set d_safebcpy
eval $setvar

: can memcpy handle overlapping blocks?
val="$undef"
case "$d_memcpy" in
"$define")
	echo " "
	echo "Checking to see if your memcpy() can do overlapping copies..." >&4
	$cat >try.c <<EOCP
#$i_memory I_MEMORY
#$i_stdlib I_STDLIB
#$i_string I_STRING
#$i_unistd I_UNISTD
EOCP
	$cat >>try.c <<'EOCP'
#include <stdio.h>
#ifdef I_MEMORY
#  include <memory.h>
#endif
#ifdef I_STDLIB
#  include <stdlib.h>
#endif
#ifdef I_STRING
#  include <string.h>
#else
#  include <strings.h>
#endif
#ifdef I_UNISTD
#  include <unistd.h>  /* Needed for NetBSD */
#endif
int main()
{
char buf[128], abc[128];
char *b;
int len;
int off;
int align;

/* Copy "abcde..." string to char abc[] so that gcc doesn't
   try to store the string in read-only memory. */
memcpy(abc, "abcdefghijklmnopqrstuvwxyz0123456789", 36);

for (align = 7; align >= 0; align--) {
	for (len = 36; len; len--) {
		b = buf+align;
		memcpy(b, abc, len);
		for (off = 1; off <= len; off++) {
			memcpy(b+off, b, len);
			memcpy(b, b+off, len);
			if (memcmp(b, abc, len))
				exit(1);
		}
	}
}
exit(0);
}
EOCP
	set try
	if eval $compile_ok; then
		if ./try 2>/dev/null; then
			echo "Yes, it can."
			val="$define"
		else
			echo "It can't, sorry."
			case "$d_memmove" in
			"$define") echo "But that's Ok since you have memmove()." ;;
			esac
		fi
	else
		echo "(I can't compile the test program, so we'll assume not...)"
		case "$d_memmove" in
		"$define") echo "But that's Ok since you have memmove()." ;;
		esac
	fi
	;;
esac
$rm -f try.* try core
set d_safemcpy
eval $setvar

: can memcmp be trusted to compare relative magnitude?
val="$undef"
case "$d_memcmp" in
"$define")
	echo " "
	echo "Checking if your memcmp() can compare relative magnitude..." >&4
	$cat >try.c <<EOCP
#$i_memory I_MEMORY
#$i_stdlib I_STDLIB
#$i_string I_STRING
#$i_unistd I_UNISTD
EOCP
	$cat >>try.c <<'EOCP'
#include <stdio.h>
#ifdef I_MEMORY
#  include <memory.h>
#endif
#ifdef I_STDLIB
#  include <stdlib.h>
#endif
#ifdef I_STRING
#  include <string.h>
#else
#  include <strings.h>
#endif
#ifdef I_UNISTD
#  include <unistd.h>  /* Needed for NetBSD */
#endif
int main()
{
char a = -1;
char b = 0;
if ((a < b) && memcmp(&a, &b, 1) < 0)
	exit(1);
exit(0);
}
EOCP
	set try
	if eval $compile_ok; then
		if ./try 2>/dev/null; then
			echo "Yes, it can."
			val="$define"
		else
			echo "No, it can't (it uses signed chars)."
		fi
	else
		echo "(I can't compile the test program, so we'll assume not...)"
	fi
	;;
esac
$rm -f try.* try core
set d_sanemcmp
eval $setvar

: see if select exists
set select d_select
eval $inlibc

: see if semctl exists
set semctl d_semctl
eval $inlibc

: see if semget exists
set semget d_semget
eval $inlibc

: see if semop exists
set semop d_semop
eval $inlibc

: see how much of the 'sem*(2)' library is present.
h_sem=true
echo " "
case "$d_semctl$d_semget$d_semop" in
*"$undef"*) h_sem=false;;
esac
case "$osname" in
freebsd)
    case "`ipcs 2>&1`" in
    "SVID messages"*"not configured"*)
	echo "Your $osname does not have the sem*(2) configured." >&4
        h_sem=false
	val="$undef"
	set semctl d_semctl
	eval $setvar
	set semget d_semget
	eval $setvar
	set semop d_semop
	eval $setvar
	;;
    esac
    ;;
esac
: we could also check for sys/ipc.h ...
if $h_sem && $test `./findhdr sys/sem.h`; then
	echo "You have the full sem*(2) library." >&4
	val="$define"
else
	echo "You don't have the full sem*(2) library." >&4
	val="$undef"
fi
set d_sem
eval $setvar

: see whether sys/sem.h defines union semun
echo " "
$cat > try.c <<'END'
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>
int main () { union semun semun; semun.buf = 0; }
END
set try
if eval $compile; then
    echo "You have union semun in <sys/sem.h>." >&4
    val="$define"
else
    echo "You do not have union semun in <sys/sem.h>." >&4
    val="$undef"
fi
$rm -f try try.c try.h
set d_union_semun
eval $setvar

: see how to do semctl IPC_STAT
case "$d_sem" in
$define)
    : see whether semctl IPC_STAT can use union semun
    echo " "
    $cat > try.h <<END
#ifndef S_IRUSR
#   ifdef S_IREAD
#	define S_IRUSR S_IREAD
#	define S_IWUSR S_IWRITE
#	define S_IXUSR S_IEXEC
#   else
#	define S_IRUSR 0400
#	define S_IWUSR 0200
#	define S_IXUSR 0100
#   endif
#   define S_IRGRP (S_IRUSR>>3)
#   define S_IWGRP (S_IWUSR>>3)
#   define S_IXGRP (S_IXUSR>>3)
#   define S_IROTH (S_IRUSR>>6)
#   define S_IWOTH (S_IWUSR>>6)
#   define S_IXOTH (S_IXUSR>>6)
#endif
#ifndef S_IRWXU
#   define S_IRWXU (S_IRUSR|S_IWUSR|S_IXUSR)
#   define S_IRWXG (S_IRGRP|S_IWGRP|S_IXGRP)
#   define S_IRWXO (S_IROTH|S_IWOTH|S_IXOTH)
#endif
END

    $cat > try.c <<END
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>
#include <sys/stat.h>
#include <stdio.h>
#include <errno.h>
#include "try.h"
#ifndef errno
extern int errno;
#endif
#$d_union_semun HAS_UNION_SEMUN
int main() {
    union semun
#ifndef HAS_UNION_SEMUN
    {
	int val;
	struct semid_ds *buf;
	unsigned short *array;
    }
#endif
    arg;
    int sem, st;

#if defined(IPC_PRIVATE) && defined(S_IRWXU) && defined(S_IRWXG) && defined(S_IRWXO) && defined(IPC_CREAT)
    sem = semget(IPC_PRIVATE, 1, S_IRWXU|S_IRWXG|S_IRWXO|IPC_CREAT);
    if (sem > -1) {
	struct semid_ds argbuf;
	arg.buf = &argbuf;
#	ifdef IPC_STAT
	st = semctl(sem, 0, IPC_STAT, arg);
	if (st == 0)
	    printf("semun\n");
	else
#	endif /* IPC_STAT */
	    printf("semctl IPC_STAT failed: errno = %d\n", errno);
#	ifdef IPC_RMID
	if (semctl(sem, 0, IPC_RMID, arg) != 0)
#   	endif /* IPC_RMID */
	    printf("semctl IPC_RMID failed: errno = %d\n", errno);
    } else
#endif /* IPC_PRIVATE && ... */
	printf("semget failed: errno = %d\n", errno);
  return 0;
}
END
    val="$undef"
    set try
    if eval $compile; then
	xxx=`./try`
        case "$xxx" in
        semun) val="$define" ;;
        esac
    fi
    $rm -f try try.c
    set d_semctl_semun
    eval $setvar
    case "$d_semctl_semun" in
    $define)
        echo "You can use union semun for semctl IPC_STAT." >&4
	also='also'
        ;;
    *)  echo "You cannot use union semun for semctl IPC_STAT." >&4
	also=''
        ;;
    esac

    : see whether semctl IPC_STAT can use struct semid_ds pointer
    $cat > try.c <<'END'
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>
#include <sys/stat.h>
#include "try.h"
#include <stdio.h>
#include <errno.h>
#ifndef errno
extern int errno;
#endif
int main() {
    struct semid_ds arg;
    int sem, st;

#if defined(IPC_PRIVATE) && defined(S_IRWXU) && defined(S_IRWXG) &&  defined(S_IRWXO) && defined(IPC_CREAT)
    sem = semget(IPC_PRIVATE, 1, S_IRWXU|S_IRWXG|S_IRWXO|IPC_CREAT);
    if (sem > -1) {
#	ifdef IPC_STAT
	st = semctl(sem, 0, IPC_STAT, &arg);
	if (st == 0)
	    printf("semid_ds\n");
	else
#	endif /* IPC_STAT */
	    printf("semctl IPC_STAT failed: errno = %d\n", errno);
#	ifdef IPC_RMID
	if (semctl(sem, 0, IPC_RMID, &arg) != 0)
#	endif /* IPC_RMID */
	    printf("semctl IPC_RMID failed: errno = %d\n", errno);
    } else
#endif /* IPC_PRIVATE && ... */
	printf("semget failed: errno = %d\n", errno);

    return 0;
}
END
    val="$undef"
    set try
    if eval $compile; then
        xxx=`./try`
        case "$xxx" in
        semid_ds) val="$define" ;;
        esac
    fi
    $rm -f try try.c
    set d_semctl_semid_ds
    eval $setvar
    case "$d_semctl_semid_ds" in
    $define)
        echo "You can $also use struct semid_ds* for semctl IPC_STAT." >&4
        ;;
    *)  echo "You cannot use struct semid_ds* for semctl IPC_STAT." >&4
        ;;
    esac
    $rm -f try.h
    ;;
*)  val="$undef"

    # We do not have the full sem*(2) library, so assume we can not
    # use either.

    set d_semctl_semun
    eval $setvar

    set d_semctl_semid_ds
    eval $setvar
    ;;
esac

: see if setegid exists
set setegid d_setegid
eval $inlibc

: see if seteuid exists
set seteuid d_seteuid
eval $inlibc

: see if setgrent exists
set setgrent d_setgrent
eval $inlibc

: see if sethostent exists
set sethostent d_sethent
eval $inlibc

: see if setlinebuf exists
set setlinebuf d_setlinebuf
eval $inlibc

: see if setlocale exists
set setlocale d_setlocale
eval $inlibc

: see if setnetent exists
set setnetent d_setnent
eval $inlibc

: see if setprotoent exists
set setprotoent d_setpent
eval $inlibc

: see if setpgid exists
set setpgid d_setpgid
eval $inlibc

: see if setpgrp2 exists
set setpgrp2 d_setpgrp2
eval $inlibc

: see if setpriority exists
set setpriority d_setprior
eval $inlibc

: see if setproctitle exists
set setproctitle d_setproctitle
eval $inlibc

: see if setpwent exists
set setpwent d_setpwent
eval $inlibc

: see if setregid exists
set setregid d_setregid
eval $inlibc
set setresgid d_setresgid
eval $inlibc

: see if setreuid exists
set setreuid d_setreuid
eval $inlibc
set setresuid d_setresuid
eval $inlibc

: see if setrgid exists
set setrgid d_setrgid
eval $inlibc

: see if setruid exists
set setruid d_setruid
eval $inlibc

: see if setservent exists
set setservent d_setsent
eval $inlibc

: see if setsid exists
set setsid d_setsid
eval $inlibc

: see if setvbuf exists
set setvbuf d_setvbuf
eval $inlibc

: see if sfio.h is available
set sfio.h i_sfio
eval $inhdr


: see if sfio library is available
case "$i_sfio" in
$define)
	val=''
	set sfreserve val
	eval $inlibc
	;;
*)
	val="$undef"
	;;
esac
: Ok, but do we want to use it.
case "$val" in
$define)
	case "$usesfio" in
	true|$define|[yY]*) dflt='y';;
	*) dflt='n';;
	esac
	echo "$package can use the sfio library, but it is experimental."
	case "$useperlio" in
	"$undef")
	    echo "For sfio also the PerlIO abstraction layer is needed."
	    echo "Earlier you said you wouldn't want that."
	    ;;
	esac
	rp="You seem to have sfio available, do you want to try using it?"
	. ./myread
	case "$ans" in
	y|Y)	echo "Ok, turning on both sfio and PerlIO, then."
		useperlio="$define"
		val="$define"
		;;
	*)	echo "Ok, avoiding sfio this time.  I'll use stdio instead."
		val="$undef"
		: Remove sfio from list of libraries to use
		set `echo X $libs | $sed -e 's/-lsfio / /' -e 's/-lsfio$//'`
		shift
		libs="$*"
		echo "libs = $libs" >&4
		;;
	esac
	;;
*)	case "$usesfio" in
	true|$define|[yY]*)
		echo "Sorry, cannot find sfio on this machine." >&4
		echo "Ignoring your setting of usesfio=$usesfio." >&4
		val="$undef"
		;;
	esac
	;;
esac
set d_sfio
eval $setvar
case "$d_sfio" in
$define) usesfio='true';;
*) usesfio='false';;
esac

: see if shmctl exists
set shmctl d_shmctl
eval $inlibc

: see if shmget exists
set shmget d_shmget
eval $inlibc

: see if shmat exists
set shmat d_shmat
eval $inlibc
: see what shmat returns
case "$d_shmat" in
"$define")
	$cat >shmat.c <<'END'
#include <sys/shm.h>
void *shmat();
END
	if $cc $ccflags -c shmat.c >/dev/null 2>&1; then
		shmattype='void *'
	else
		shmattype='char *'
	fi
	echo "and it returns ($shmattype)." >&4
	: see if a prototype for shmat is available
	xxx=`./findhdr sys/shm.h`
	$cppstdin $cppflags $cppminus < $xxx > shmat.c 2>/dev/null
	if $contains 'shmat.*(' shmat.c >/dev/null 2>&1; then
		val="$define"
	else
		val="$undef"
	fi
	$rm -f shmat.[co]
	;;
*)
	val="$undef"
	;;
esac
set d_shmatprototype
eval $setvar

: see if shmdt exists
set shmdt d_shmdt
eval $inlibc

: see how much of the 'shm*(2)' library is present.
h_shm=true
echo " "
case "$d_shmctl$d_shmget$d_shmat$d_shmdt" in
*"$undef"*) h_shm=false;;
esac
case "$osname" in
freebsd)
    case "`ipcs 2>&1`" in
    "SVID shared memory"*"not configured"*)
	echo "Your $osname does not have the shm*(2) configured." >&4
        h_shm=false
	val="$undef"
	set shmctl d_shmctl
	evat $setvar
	set shmget d_shmget
	evat $setvar
	set shmat d_shmat
	evat $setvar
	set shmdt d_shmdt
	evat $setvar
	;;
    esac
    ;;
esac
: we could also check for sys/ipc.h ...
if $h_shm && $test `./findhdr sys/shm.h`; then
	echo "You have the full shm*(2) library." >&4
	val="$define"
else
	echo "You don't have the full shm*(2) library." >&4
	val="$undef"
fi
set d_shm
eval $setvar

echo " "
: see if we have sigaction
if set sigaction val -f d_sigaction; eval $csym; $val; then
	echo 'sigaction() found.' >&4
	$cat > try.c <<'EOP'
#include <stdio.h>
#include <sys/types.h>
#include <signal.h>
int main()
{
    struct sigaction act, oact;
    act.sa_flags = 0;
    oact.sa_handler = 0;
    /* so that act and oact are used */
    exit(act.sa_flags == 0 &&  oact.sa_handler == 0);
}
EOP
	set try
	if eval $compile_ok; then
		val="$define"
	else
		echo "But you don't seem to have a useable struct sigaction." >&4
		val="$undef"
	fi
else
	echo 'sigaction NOT found.' >&4
	val="$undef"
fi
set d_sigaction; eval $setvar
$rm -f try try$_o try.c

: see if sigsetjmp exists
echo " "
case "$d_sigsetjmp" in
'')
	$cat >try.c <<'EOP'
#include <setjmp.h>
sigjmp_buf env;
int set = 1;
int main()
{
	if (sigsetjmp(env,1))
		exit(set);
	set = 0;
	siglongjmp(env, 1);
	exit(1);
}
EOP
	set try
	if eval $compile; then
		if ./try >/dev/null 2>&1; then
			echo "POSIX sigsetjmp found." >&4
			val="$define"
		else
			$cat >&4 <<EOM
Uh-Oh! You have POSIX sigsetjmp and siglongjmp, but they do not work properly!!
I'll ignore them.
EOM
			val="$undef"
		fi
	else
		echo "sigsetjmp not found." >&4
		val="$undef"
	fi
	;;
*) val="$d_sigsetjmp"
	case "$d_sigsetjmp" in
	$define) echo "POSIX sigsetjmp found." >&4;;
	$undef) echo "sigsetjmp not found." >&4;;
	esac
	;;
esac
set d_sigsetjmp
eval $setvar
$rm -f try.c try

: see if socks5_init exists
set socks5_init d_socks5_init
eval $inlibc

: see if sys/stat.h is available
set sys/stat.h i_sysstat
eval $inhdr


: see if stat knows about block sizes
echo " "
echo "Checking to see if your struct stat has st_blocks field..." >&4
set d_statblks stat st_blocks $i_sysstat sys/stat.h
eval $hasfield


: see if this is a sys/vfs.h system
set sys/vfs.h i_sysvfs
eval $inhdr


: see if this is a sys/statfs.h system
set sys/statfs.h i_sysstatfs
eval $inhdr


echo " "
echo "Checking to see if your system supports struct statfs..." >&4
set d_statfs_s statfs $i_systypes sys/types.h $i_sysparam sys/param.h $i_sysmount sys/mount.h $i_sysvfs sys/vfs.h $i_sysstatfs sys/statfs.h
eval $hasstruct
case "$d_statfs_s" in
"$define")      echo "Yes, it does."   ;;
*)              echo "No, it doesn't." ;;
esac



: see if struct statfs knows about f_flags
case "$d_statfs_s" in
define)	
	echo " "
	echo "Checking to see if your struct statfs has f_flags field..." >&4
	set d_statfs_f_flags statfs f_flags $i_systypes sys/types.h $i_sysparam sys/param.h $i_sysmount sys/mount.h $i_sysvfs sys/vfs.h $i_sysstatfs sys/statfs.h
	eval $hasfield
	;;
*)	val="$undef"
	set d_statfs_f_flags
	eval $setvar
	;;
esac
case "$d_statfs_f_flags" in
"$define")      echo "Yes, it does."   ;;
*)              echo "No, it doesn't." ;;
esac

: see if _ptr and _cnt from stdio act std
echo " "

if $contains '_lbfsize' `./findhdr stdio.h` >/dev/null 2>&1 ; then
	echo "(Looks like you have stdio.h from BSD.)"
	case "$stdio_ptr" in
	'') stdio_ptr='((fp)->_p)'
		ptr_lval=$define
		;;
	*)	ptr_lval=$d_stdio_ptr_lval;;
	esac
	case "$stdio_cnt" in
	'') stdio_cnt='((fp)->_r)'
		cnt_lval=$define
		;;
	*)	cnt_lval=$d_stdio_cnt_lval;;
	esac
	case "$stdio_base" in
	'') stdio_base='((fp)->_ub._base ? (fp)->_ub._base : (fp)->_bf._base)';;
	esac
	case "$stdio_bufsiz" in
	'') stdio_bufsiz='((fp)->_ub._base ? (fp)->_ub._size : (fp)->_bf._size)';;
	esac
elif $contains '_IO_fpos_t' `./findhdr stdio.h` `./findhdr libio.h` >/dev/null 2>&1 ; then
	echo "(Looks like you have stdio.h from Linux.)"
	case "$stdio_ptr" in
	'') stdio_ptr='((fp)->_IO_read_ptr)'
		ptr_lval=$define
		;;
	*)	ptr_lval=$d_stdio_ptr_lval;;
	esac
	case "$stdio_cnt" in
	'') stdio_cnt='((fp)->_IO_read_end - (fp)->_IO_read_ptr)'
		cnt_lval=$undef
		;;
	*)	cnt_lval=$d_stdio_cnt_lval;;
	esac
	case "$stdio_base" in
	'') stdio_base='((fp)->_IO_read_base)';;
	esac
	case "$stdio_bufsiz" in
	'') stdio_bufsiz='((fp)->_IO_read_end - (fp)->_IO_read_base)';;
	esac
else
	case "$stdio_ptr" in
	'') stdio_ptr='((fp)->_ptr)'
		ptr_lval=$define
		;;
	*)	ptr_lval=$d_stdio_ptr_lval;;
	esac
	case "$stdio_cnt" in
	'') stdio_cnt='((fp)->_cnt)'
		cnt_lval=$define
		;;
	*)	cnt_lval=$d_stdio_cnt_lval;;
	esac
	case "$stdio_base" in
	'') stdio_base='((fp)->_base)';;
	esac
	case "$stdio_bufsiz" in
	'') stdio_bufsiz='((fp)->_cnt + (fp)->_ptr - (fp)->_base)';;
	esac
fi

: test whether _ptr and _cnt really work
echo "Checking how std your stdio is..." >&4
$cat >try.c <<EOP
#include <stdio.h>
#define FILE_ptr(fp)	$stdio_ptr
#define FILE_cnt(fp)	$stdio_cnt
int main() {
	FILE *fp = fopen("try.c", "r");
	char c = getc(fp);
	if (
		18 <= FILE_cnt(fp) &&
		strncmp(FILE_ptr(fp), "include <stdio.h>\n", 18) == 0
	)
		exit(0);
	exit(1);
}
EOP
val="$undef"
set try
if eval $compile; then
	if ./try; then
		echo "Your stdio acts pretty std."
		val="$define"
	else
		echo "Your stdio isn't very std."
	fi
else
	echo "Your stdio doesn't appear very std."
fi
$rm -f try.c try
set d_stdstdio
eval $setvar

: Can _ptr be used as an lvalue?
case "$d_stdstdio$ptr_lval" in
$define$define) val=$define ;;
*) val=$undef ;;
esac
set d_stdio_ptr_lval
eval $setvar

: Can _cnt be used as an lvalue?
case "$d_stdstdio$cnt_lval" in
$define$define) val=$define ;;
*) val=$undef ;;
esac
set d_stdio_cnt_lval
eval $setvar


: test whether setting _ptr sets _cnt as a side effect
d_stdio_ptr_lval_sets_cnt="$undef"
d_stdio_ptr_lval_nochange_cnt="$undef"
case "$d_stdio_ptr_lval$d_stdstdio" in
$define$define)
	echo "Checking to see what happens if we set the stdio ptr..." >&4
$cat >try.c <<EOP
#include <stdio.h>
/* Can we scream? */
/* Eat dust sed :-) */
/* In the buffer space, no one can hear you scream. */
#define FILE_ptr(fp)	$stdio_ptr
#define FILE_cnt(fp)	$stdio_cnt
#include <sys/types.h>
int main() {
	FILE *fp = fopen("try.c", "r");
	int c;
	char *ptr;
	size_t cnt;
	if (!fp) {
	    puts("Fail even to read");
	    exit(1);
	}
	c = getc(fp); /* Read away the first # */
	if (c == EOF) {
	    puts("Fail even to read");
	    exit(1);
	}
	if (!(
		18 <= FILE_cnt(fp) &&
		strncmp(FILE_ptr(fp), "include <stdio.h>\n", 18) == 0
	)) {
		puts("Fail even to read");
		exit (1);
	}
	ptr = (char*) FILE_ptr(fp);
	cnt = (size_t)FILE_cnt(fp);

	FILE_ptr(fp) += 42;

	if ((char*)FILE_ptr(fp) != (ptr + 42)) {
		printf("Fail ptr check %p != %p", FILE_ptr(fp), (ptr + 42));
		exit (1);
	}
	if (FILE_cnt(fp) <= 20) {
		printf ("Fail (<20 chars to test)");
		exit (1);
	}
	if (strncmp(FILE_ptr(fp), "Eat dust sed :-) */\n", 20) != 0) {
		puts("Fail compare");
		exit (1);
	}
	if (cnt == FILE_cnt(fp)) {
		puts("Pass_unchanged");
		exit (0);
	}	
	if (FILE_cnt(fp) == (cnt - 42)) {
		puts("Pass_changed");
		exit (0);
	}
	printf("Fail count was %d now %d\n", cnt, FILE_cnt(fp));
	return 1;

}
EOP
	set try
	if eval $compile; then
 		case `./try$exe_ext` in
		Pass_changed)
			echo "Increasing ptr in your stdio decreases cnt by the same amount.  Good." >&4
			d_stdio_ptr_lval_sets_cnt="$define" ;;
		Pass_unchanged)
			echo "Increasing ptr in your stdio leaves cnt unchanged.  Good." >&4
			d_stdio_ptr_lval_nochange_cnt="$define" ;;
		Fail*)
			echo "Increasing ptr in your stdio didn't do exactly what I expected.  We'll not be doing that then." >&4 ;;
		*)
			echo "It appears attempting to set ptr in your stdio is a bad plan." >&4 ;;
	esac
	else
		echo "It seems we can't set ptr in your stdio.  Nevermind." >&4
	fi
	$rm -f try.c try
	;;
esac

: see if _base is also standard
val="$undef"
case "$d_stdstdio" in
$define)
	$cat >try.c <<EOP
#include <stdio.h>
#define FILE_base(fp)	$stdio_base
#define FILE_bufsiz(fp)	$stdio_bufsiz
int main() {
	FILE *fp = fopen("try.c", "r");
	char c = getc(fp);
	if (
		19 <= FILE_bufsiz(fp) &&
		strncmp(FILE_base(fp), "#include <stdio.h>\n", 19) == 0
	)
		exit(0);
	exit(1);
}
EOP
	set try
	if eval $compile; then
		if ./try; then
			echo "And its _base field acts std."
			val="$define"
		else
			echo "But its _base field isn't std."
		fi
	else
		echo "However, it seems to be lacking the _base field."
	fi
	$rm -f try.c try
	;;
esac
set d_stdiobase
eval $setvar

$cat >&4 <<EOM
Checking how to access stdio streams by file descriptor number...
EOM
case "$stdio_stream_array" in
'') 	$cat >try.c <<EOCP
#include <stdio.h>
int main() {
  if (&STDIO_STREAM_ARRAY[fileno(stdin)] == stdin)
    printf("yes\n");
}
EOCP
	for s in _iob __iob __sF
	do
	        set try -DSTDIO_STREAM_ARRAY=$s
		if eval $compile; then
		    	case "`./try$exe_ext`" in
			yes)	stdio_stream_array=$s; break ;;
			esac
		fi
	done
	$rm -f try.* try$exe_ext
esac
case "$stdio_stream_array" in
'')	$cat >&4 <<EOM
I can't figure out how to access stdio streams by file descriptor number.
EOM
	d_stdio_stream_array="$undef"
	;;
*)	$cat >&4 <<EOM
You can access stdio streams by file descriptor number by the $stdio_stream_array array.
EOM
	d_stdio_stream_array="$define"
	;;
esac

: see if strcoll exists
set strcoll d_strcoll
eval $inlibc

: check for structure copying
echo " "
echo "Checking to see if your C compiler can copy structs..." >&4
$cat >try.c <<'EOCP'
int main()
{
	struct blurfl {
		int dyick;
	} foo, bar;

	foo = bar;
}
EOCP
if $cc -c try.c >/dev/null 2>&1 ; then
	val="$define"
	echo "Yup, it can."
else
	val="$undef"
	echo "Nope, it can't."
fi
set d_strctcpy
eval $setvar
$rm -f try.*

: see if strerror and/or sys_errlist[] exist
echo " "
if test "X$d_strerror" = X -o "X$d_syserrlst" = X; then
    if set strerror val -f d_strerror; eval $csym; $val; then
		echo 'strerror() found.' >&4
		d_strerror="$define"
		d_strerrm='strerror(e)'
		if set sys_errlist val -a d_syserrlst; eval $csym; $val; then	
			echo "(You also have sys_errlist[], so we could roll our own strerror.)" 
			d_syserrlst="$define"
		else
			echo "(Since you don't have sys_errlist[], sterror() is welcome.)"
			d_syserrlst="$undef"
		fi
    elif xxx=`./findhdr string.h`; test "$xxx" || xxx=`./findhdr strings.h`; \
			$contains '#[ 	]*define.*strerror' "$xxx" >/dev/null 2>&1; then
		echo 'strerror() found in string header.' >&4
		d_strerror="$define"
		d_strerrm='strerror(e)'
		if set sys_errlist val -a d_syserrlst; eval $csym; $val; then	
			echo "(Most probably, strerror() uses sys_errlist[] for descriptions.)"
				d_syserrlst="$define"
		else
			echo "(You don't appear to have any sys_errlist[], how can this be?)"
			d_syserrlst="$undef"
		fi
    elif set sys_errlist val -a d_syserrlst; eval $csym; $val; then
		echo "strerror() not found, but you have sys_errlist[] so we'll use that." >&4
		d_strerror="$undef"
		d_syserrlst="$define"
		d_strerrm='((e)<0||(e)>=sys_nerr?"unknown":sys_errlist[e])'
    else
		echo 'strerror() and sys_errlist[] NOT found.' >&4
		d_strerror="$undef"
		d_syserrlst="$undef"
		d_strerrm='"unknown"'
    fi
fi

: see if strtod exists
set strtod d_strtod
eval $inlibc

: see if strtol exists
set strtol d_strtol
eval $inlibc

: see if strtold exists
set strtold d_strtold
eval $inlibc

: see if strtoll exists
set strtoll d_strtoll
eval $inlibc

case "$d_longlong-$d_strtoll" in
"$define-$define")
	$cat <<EOM
Checking whether your strtoll() works okay...
EOM
	$cat >try.c <<'EOCP'
#include <errno.h>
#ifdef __hpux
#define strtoll __strtoll
#endif
#ifdef __EMX__
#define strtoll _strtoll
#endif
#include <stdio.h>
extern long long int strtoll(char *s, char **, int); 
static int bad = 0;
int check(char *s, long long ell, int een) {
	long long gll;
	errno = 0;
	gll = strtoll(s, 0, 10);
	if (!((gll == ell) && (errno == een)))
		bad++;
}
int main() {
	check(" 1",                                      1LL, 0);
	check(" 0",                                      0LL, 0);
	check("-1",                                     -1LL, 0);
	check("-9223372036854775808", -9223372036854775808LL, 0);
	check("-9223372036854775808", -9223372036854775808LL, 0);
	check(" 9223372036854775807",  9223372036854775807LL, 0);
	check("-9223372036854775808", -9223372036854775808LL, 0);
	check(" 9223372036854775808",  9223372036854775807LL, ERANGE);
	check("-9223372036854775809", -9223372036854775808LL, ERANGE);
	if (!bad)
		printf("ok\n");
}
EOCP
	set try
	if eval $compile; then
		yyy=`./try`
		case "$yyy" in
		ok) echo "Your strtoll() seems to be working okay." ;;
		*) cat <<EOM >&4
Your strtoll() doesn't seem to be working okay.
EOM
		   d_strtoll="$undef"
		   ;;
		esac
	else
		echo "(I can't seem to compile the test program--assuming it doesn't)"
		d_strtoll="$undef"
	fi
	;;
esac

: see if strtoul exists
set strtoul d_strtoul
eval $inlibc

: see if strtoull exists
set strtoull d_strtoull
eval $inlibc

case "$d_longlong-$d_strtoull" in
"$define-$define")
	$cat <<EOM
Checking whether your strtoull() works okay...
EOM
	$cat >try.c <<'EOCP'
#include <errno.h>
#ifdef __hpux
#define strtoull __strtoull
#endif
#include <stdio.h>
extern unsigned long long int strtoull(char *s, char **, int); 
static int bad = 0;
int check(char *s, long long eull, int een) {
	long long gull;
	errno = 0;
	gull = strtoull(s, 0, 10);
	if (!((gull == eull) && (errno == een)))
		bad++;
}
int main() {
	check(" 1",                                       1LL, 0);
	check(" 0",                                       0LL, 0);
	check("18446744073709551615", 18446744073709551615ULL, 0);
	check("18446744073709551616", 18446744073709551615ULL, ERANGE);
	if (!bad)
		printf("ok\n");
}
EOCP
	set try
	if eval $compile; then
		case "`./try`" in
		ok) echo "Your strtoull() seems to be working okay." ;;
		*) cat <<EOM >&4
Your strtoull() doesn't seem to be working okay.
EOM
		   d_strtoull="$undef"
		   ;;
		esac
	fi
	;;
esac

: see if strtouq exists
set strtouq d_strtouq
eval $inlibc

: see if strxfrm exists
set strxfrm d_strxfrm
eval $inlibc

: see if symlink exists
set symlink d_symlink
eval $inlibc

: see if syscall exists
set syscall d_syscall
eval $inlibc

: see if sysconf exists
set sysconf d_sysconf
eval $inlibc

: see if system exists
set system d_system
eval $inlibc

: see if tcgetpgrp exists
set tcgetpgrp d_tcgetpgrp
eval $inlibc

: see if tcsetpgrp exists
set tcsetpgrp d_tcsetpgrp
eval $inlibc

: see if prototype for telldir is available
echo " "
set d_telldirproto telldir $i_systypes sys/types.h $i_dirent dirent.h
eval $hasproto

: see if this is a sys/times.h system
set sys/times.h i_systimes
eval $inhdr

: see if times exists
echo " "
if set times val -f d_times; eval $csym; $val; then
	echo 'times() found.' >&4
	d_times="$define"
	inc=''
	case "$i_systimes" in
	"$define") inc='sys/times.h';;
	esac
	rp="What is the type returned by times() on this system?"
	set clock_t clocktype long stdio.h sys/types.h $inc
	eval $typedef_ask
else
	echo 'times() NOT found, hope that will do.' >&4
	d_times="$undef"
	clocktype='int'
fi

: see if truncate exists
set truncate d_truncate
eval $inlibc

: see if tzname[] exists
echo " "
if set tzname val -a d_tzname; eval $csym; $val; then
	val="$define"
	echo 'tzname[] found.' >&4
else
	val="$undef"
	echo 'tzname[] NOT found.' >&4
fi
set d_tzname
eval $setvar

: see if umask exists
set umask d_umask
eval $inlibc

: see if ustat exists
set ustat d_ustat
eval $inlibc

: backward compatibility for d_hvfork
if test X$d_hvfork != X; then
	d_vfork="$d_hvfork"
	d_hvfork=''
fi
: see if there is a vfork
val=''
set vfork val
eval $inlibc

: Ok, but do we want to use it. vfork is reportedly unreliable in 
: perl on Solaris 2.x, and probably elsewhere.
case "$val" in
$define)
	echo " "
	case "$usevfork" in
	false) dflt='n';;
	*) dflt='y';;
	esac
	cat <<'EOM'
 
Perl can only use a vfork() that doesn't suffer from strict
restrictions on calling functions or modifying global data in
the child.  For example, glibc-2.1 contains such a vfork()
that is unsuitable.  If your system provides a proper fork()
call, chances are that you do NOT want perl to use vfork().

EOM
	rp="Do you still want to use vfork()?"
	. ./myread
	case "$ans" in
	y|Y) ;;
	*)
		echo "Ok, we won't use vfork()."
		val="$undef"
		;;
	esac
	;;
esac
set d_vfork
eval $setvar
case "$d_vfork" in
$define) usevfork='true';;
*) usevfork='false';;
esac

: see if this is an sysdir system
set sys/dir.h i_sysdir
eval $inhdr

: see if this is an sysndir system
set sys/ndir.h i_sysndir
eval $inhdr

: see if closedir exists
set closedir d_closedir
eval $inlibc

case "$d_closedir" in
"$define")
	echo " "
	echo "Checking whether closedir() returns a status..." >&4
	cat > closedir.c <<EOM
#$i_dirent I_DIRENT		/**/
#$i_sysdir I_SYS_DIR		/**/
#$i_sysndir I_SYS_NDIR		/**/
#$i_systypes I_SYS_TYPES	/**/

#if defined(I_SYS_TYPES)
#include <sys/types.h>
#endif
#if defined(I_DIRENT)
#include <dirent.h>
#if defined(NeXT) && defined(I_SYS_DIR) /* NeXT needs dirent + sys/dir.h */
#include <sys/dir.h>
#endif
#else
#ifdef I_SYS_NDIR
#include <sys/ndir.h>
#else
#ifdef I_SYS_DIR
#ifdef hp9000s500
#include <ndir.h>	/* may be wrong in the future */
#else
#include <sys/dir.h>
#endif
#endif
#endif
#endif 
int main() { return closedir(opendir(".")); }
EOM
	set closedir
	if eval $compile_ok; then
		if ./closedir > /dev/null 2>&1 ; then
			echo "Yes, it does."
			val="$undef"
		else
			echo "No, it doesn't."
			val="$define"
		fi
	else
		echo "(I can't seem to compile the test program--assuming it doesn't)"
		val="$define"
	fi
	;;
*)
	val="$undef";
	;;
esac
set d_void_closedir
eval $setvar
$rm -f closedir*
: see if there is a wait4
set wait4 d_wait4
eval $inlibc

: see if waitpid exists
set waitpid d_waitpid
eval $inlibc

: see if wcstombs exists
set wcstombs d_wcstombs
eval $inlibc

: see if wctomb exists
set wctomb d_wctomb
eval $inlibc

: preserve RCS keywords in files with variable substitution, grrr
Date='$Date'
Id='$Id'
Log='$Log'
RCSfile='$RCSfile'
Revision='$Revision'

case "$crosscompile" in
''|[nN]*) crosscompile="$undef" ;;
esac

case "$osname" in
next|rhapsody|darwin) multiarch="$define" ;;
esac
case "$multiarch" in
''|[nN]*) multiarch="$undef" ;;
esac

: check for alignment requirements
echo " "
case "$crosscompile$multiarch" in
*$define*)
	$cat <<EOM
You seem to be either cross-compiling or doing a multiarchitecture build,
skipping the memory alignment check.

EOM
	case "$alignbytes" in
	'') alignbytes=8 ;;
	esac
	;;
*)
	case "$alignbytes" in
	'') echo "Checking alignment constraints..." >&4
		if $test "X$uselongdouble" = Xdefine -a "X$d_longdbl" = Xdefine; then
			$cat >try.c <<'EOCP'
typedef long double NV;
EOCP
		else
			$cat >try.c <<'EOCP'
typedef double NV;
EOCP
		fi
		$cat >>try.c <<'EOCP'
#include <stdio.h>
struct foobar {
	char foo;
	NV bar;
} try_algn;
int main()
{
    printf("%d\n", (int)((char *)&try_algn.bar - (char *)&try_algn.foo));
    return(0);
}
EOCP
		set try
		if eval $compile_ok; then
			dflt=`./try`
		else
			dflt='8'
			echo "(I can't seem to compile the test program...)"
		fi
		;;
	*) dflt="$alignbytes"
		;;
	esac
	rp="Doubles must be aligned on a how-many-byte boundary?"
	. ./myread
	alignbytes="$ans"
	$rm -f try.c try
	;;
esac


: set the base revision
baserev=5.0

: check for ordering of bytes in a long
echo " "
case "$crosscompile$multiarch" in
*$define*)
	$cat <<EOM
You seem to be either cross-compiling or doing a multiarchitecture build,
skipping the byteorder check.

EOM
	byteorder='0xffff'
	;;
*)
	case "$byteorder" in
	'')
		$cat <<'EOM'
In the following, larger digits indicate more significance.  A big-endian
machine like a Pyramid or a Motorola 680?0 chip will come out to 4321. A
little-endian machine like a Vax or an Intel 80?86 chip would be 1234. Other
machines may have weird orders like 3412.  A Cray will report 87654321,
an Alpha will report 12345678. If the test program works the default is
probably right.
I'm now running the test program...
EOM
		$cat >try.c <<'EOCP'
#include <stdio.h>
int main()
{
	int i;
	union {
		unsigned long l;
		char c[sizeof(long)];
	} u;

	if (sizeof(long) > 4)
		u.l = (0x08070605L << 32) | 0x04030201L;
	else
		u.l = 0x04030201L;
	for (i = 0; i < sizeof(long); i++)
		printf("%c", u.c[i]+'0');
	printf("\n");
	exit(0);
}
EOCP
		xxx_prompt=y
		set try
		if eval $compile && ./try > /dev/null; then
			dflt=`./try`
			case "$dflt" in
			[1-4][1-4][1-4][1-4]|12345678|87654321)
				echo "(The test program ran ok.)"
				echo "byteorder=$dflt"
				xxx_prompt=n
			;;
			????|????????) echo "(The test program ran ok.)" ;;
			*) echo "(The test program didn't run right for some reason.)" ;;
			esac
		else
			dflt='4321'
			cat <<'EOM'
(I can't seem to compile the test program.  Guessing big-endian...)
EOM
		fi
		case "$xxx_prompt" in
		y)
			rp="What is the order of bytes in a long?"
			. ./myread
			byteorder="$ans"
			;;
		*)	byteorder=$dflt
			;;
		esac
		;;
	esac
	$rm -f try.c try
	;;
esac


: how do we catenate cpp tokens here?
echo " "
echo "Checking to see how your cpp does stuff like catenate tokens..." >&4
$cat >cpp_stuff.c <<'EOCP'
#define RCAT(a,b)a/**/b
#define ACAT(a,b)a ## b
RCAT(Rei,ser)
ACAT(Cir,cus)
EOCP
$cppstdin $cppflags $cppminus <cpp_stuff.c >cpp_stuff.out 2>&1
if $contains 'Circus' cpp_stuff.out >/dev/null 2>&1; then
	echo "Oh!  Smells like ANSI's been here." >&4
	echo "We can catify or stringify, separately or together!"
	cpp_stuff=42
elif $contains 'Reiser' cpp_stuff.out >/dev/null 2>&1; then
	echo "Ah, yes!  The good old days!" >&4
	echo "However, in the good old days we don't know how to stringify and"
	echo "catify at the same time."
	cpp_stuff=1
else
	$cat >&4 <<EOM
Hmm, I don't seem to be able to catenate tokens with your cpp.  You're going
to have to edit the values of CAT[2-5] in config.h...
EOM
	cpp_stuff="/* Help! How do we handle cpp_stuff? */*/"
fi
$rm -f cpp_stuff.*

: see if this is a db.h system
set db.h i_db
eval $inhdr

case "$i_db" in
$define)
	: Check db version.
	echo " "
	echo "Checking Berkeley DB version ..." >&4
	$cat >try.c <<EOCP
#$d_const HASCONST
#ifndef HASCONST
#define const
#endif
#include <sys/types.h>
#include <stdio.h>
#include <db.h>
int main()
{
#ifdef DB_VERSION_MAJOR	/* DB version >= 2 */
    int Major, Minor, Patch ;
    unsigned long Version ;
    (void)db_version(&Major, &Minor, &Patch) ;
    printf("You have Berkeley DB Version 2 or greater\n");

    printf("db.h is from Berkeley DB Version %d.%d.%d\n",
		DB_VERSION_MAJOR, DB_VERSION_MINOR, DB_VERSION_PATCH);
    printf("libdb is from Berkeley DB Version %d.%d.%d\n",
		Major, Minor, Patch) ;

    /* check that db.h & libdb are compatible */
    if (DB_VERSION_MAJOR != Major || DB_VERSION_MINOR != Minor || DB_VERSION_PATCH != Patch) {
	printf("db.h and libdb are incompatible\n") ;
        exit(3);	
    }

    printf("db.h and libdb are compatible\n") ;

    Version = DB_VERSION_MAJOR * 1000000 + DB_VERSION_MINOR * 1000
		+ DB_VERSION_PATCH ;

    /* needs to be >= 2.3.4 */
    if (Version < 2003004) {
    /* if (DB_VERSION_MAJOR == 2 && DB_VERSION_MINOR == 0 && DB_VERSION_PATCH < 5) { */
	printf("but Perl needs Berkeley DB 2.3.4 or greater\n") ;
        exit(2);	
    }

    exit(0);
#else
#if defined(_DB_H_) && defined(BTREEMAGIC) && defined(HASHMAGIC)
    printf("You have Berkeley DB Version 1\n");
    exit(0);	/* DB version < 2: the coast is clear. */
#else
    exit(1);	/* <db.h> not Berkeley DB? */
#endif
#endif
}
EOCP
	set try
	if eval $compile_ok && ./try; then
		echo 'Looks OK.' >&4
	else
		echo "I can't use Berkeley DB with your <db.h>.  I'll disable Berkeley DB." >&4
		i_db=$undef
		case " $libs " in
		*"-ldb "*)
			: Remove db from list of libraries to use
			echo "Removing unusable -ldb from library list" >&4
			set `echo X $libs | $sed -e 's/-ldb / /' -e 's/-ldb$//'`
			shift
			libs="$*"
			echo "libs = $libs" >&4
			;;
		esac
	fi
	$rm -f try.*
	;;
esac

case "$i_db" in
define)
	: Check the return type needed for hash 
	echo " "
	echo "Checking return type needed for hash for Berkeley DB ..." >&4
	$cat >try.c <<EOCP
#$d_const HASCONST
#ifndef HASCONST
#define const
#endif
#include <sys/types.h>
#include <db.h>

#ifndef DB_VERSION_MAJOR
u_int32_t hash_cb (ptr, size)
const void *ptr;
size_t size;
{
}
HASHINFO info;
int main()
{
	info.hash = hash_cb;
}
#endif
EOCP
	if $cc $ccflags -c try.c >try.out 2>&1 ; then
		if $contains warning try.out >>/dev/null 2>&1 ; then
			db_hashtype='int'
		else
			db_hashtype='u_int32_t'
		fi
	else
		: XXX Maybe we should just give up here.
		db_hashtype=u_int32_t
		$cat try.out >&4
		echo "Help:  I can't seem to compile the db test program." >&4
		echo "Something's wrong, but I'll assume you use $db_hashtype." >&4
	fi
	$rm -f try.*
	echo "Your version of Berkeley DB uses $db_hashtype for hash."
	;;
*)	db_hashtype=u_int32_t
	;;
esac
case "$i_db" in
define)
	: Check the return type needed for prefix 
	echo " "
	echo "Checking return type needed for prefix for Berkeley DB ..." >&4
	cat >try.c <<EOCP
#$d_const HASCONST
#ifndef HASCONST
#define const
#endif
#include <sys/types.h>
#include <db.h>

#ifndef DB_VERSION_MAJOR
size_t prefix_cb (key1, key2)
const DBT *key1;
const DBT *key2;
{
}
BTREEINFO info;
int main()
{
	info.prefix = prefix_cb;
}
#endif
EOCP
	if $cc $ccflags -c try.c  >try.out 2>&1 ; then
		if $contains warning try.out >>/dev/null 2>&1 ; then
			db_prefixtype='int'
		else
			db_prefixtype='size_t'
		fi
	else
		db_prefixtype='size_t'
		: XXX Maybe we should just give up here.
		$cat try.out >&4
		echo "Help:  I can't seem to compile the db test program." >&4
		echo "Something's wrong, but I'll assume you use $db_prefixtype." >&4
	fi
	$rm -f try.*
	echo "Your version of Berkeley DB uses $db_prefixtype for prefix."
	;;
*)	db_prefixtype='size_t'
	;;
esac

: check for void type
echo " "
echo "Checking to see how well your C compiler groks the void type..." >&4
case "$voidflags" in
'')
	$cat >try.c <<'EOCP'
#if TRY & 1
void sub() {
#else
sub() {
#endif
	extern void moo();	/* function returning void */
	void (*goo)();		/* ptr to func returning void */
#if TRY & 8
	void *hue;		/* generic ptr */
#endif
#if TRY & 2
	void (*foo[10])();
#endif

#if TRY & 4
	if(goo == moo) {
		exit(0);
	}
#endif
	exit(0);
}
int main() { sub(); }
EOCP
	if $cc $ccflags -c -DTRY=$defvoidused try.c >.out 2>&1 ; then
		voidflags=$defvoidused
	echo "Good.  It appears to support void to the level $package wants.">&4
		if $contains warning .out >/dev/null 2>&1; then
			echo "However, you might get some warnings that look like this:"
			$cat .out
		fi
	else
echo "Hmm, your compiler has some difficulty with void. Checking further..." >&4
		if $cc $ccflags -c -DTRY=1 try.c >/dev/null 2>&1; then
			echo "It supports 1..."
			if $cc $ccflags -c -DTRY=3 try.c >/dev/null 2>&1; then
				echo "It also supports 2..."
				if $cc $ccflags -c -DTRY=7 try.c >/dev/null 2>&1; then
					voidflags=7
					echo "And it supports 4 but not 8 definitely."
				else
					echo "It doesn't support 4..."
					if $cc $ccflags -c -DTRY=11 try.c >/dev/null 2>&1; then
						voidflags=11
						echo "But it supports 8."
					else
						voidflags=3
						echo "Neither does it support 8."
					fi
				fi
			else
				echo "It does not support 2..."
				if $cc $ccflags -c -DTRY=13 try.c >/dev/null 2>&1; then
					voidflags=13
					echo "But it supports 4 and 8."
				else
					if $cc $ccflags -c -DTRY=5 try.c >/dev/null 2>&1; then
						voidflags=5
						echo "And it supports 4 but has not heard about 8."
					else
						echo "However it supports 8 but not 4."
					fi
				fi
			fi
		else
			echo "There is no support at all for void."
			voidflags=0
		fi
	fi
esac
case "$voidflags" in
"$defvoidused") ;;
*)	$cat >&4 <<'EOM'
  Support flag bits are:
    1: basic void declarations.
    2: arrays of pointers to functions returning void.
    4: operations between pointers to and addresses of void functions.
    8: generic void pointers.
EOM
	dflt="$voidflags";
	rp="Your void support flags add up to what?"
	. ./myread
	voidflags="$ans"
	;;
esac
$rm -f try.* .out


: How can we generate normalized random numbers ?
echo " "
echo "Looking for a random number function..." >&4
case "$randfunc" in
'')
	if set drand48 val -f; eval $csym; $val; then
		dflt="drand48"
		echo "Good, found drand48()." >&4
	elif set random val -f; eval $csym; $val; then
		dflt="random"
		echo "OK, found random()." >&4
	else
		dflt="rand"
		echo "Yick, looks like I have to use rand()." >&4
	fi
	echo " "
	;;
*)
	dflt="$randfunc"
	;;
esac
cont=true

case "$ccflags" in
*-Dmy_rand=*|*-Dmy_srand=*)
	echo "Removing obsolete -Dmy_rand, -Dmy_srand, and -Drandbits from ccflags." >&4
	ccflags="`echo $ccflags | sed -e 's/-Dmy_rand=random/ /'`"
	ccflags="`echo $ccflags | sed -e 's/-Dmy_srand=srandom/ /'`"
	ccflags="`echo $ccflags | sed -e 's/-Drandbits=[0-9][0-9]*/ /'`"
	;;
esac

while $test "$cont"; do
	rp="Use which function to generate random numbers?"
	. ./myread
	if $test "$ans" = "$dflt"; then
		: null
	else
		randbits=''
	fi
	randfunc="$ans"
	if set $ans val -f; eval $csym; $val; then
		cont=''
	else
		dflt=y
		rp="I cannot find function $ans. Use that name anyway?"
		. ./myread
		dflt=rand
		case "$ans" in
			[yY]*) cont='';;
		esac
	fi
	case "$cont" in
	'')
		case "$randfunc" in
		drand48)
			drand01="drand48()"
			seedfunc="srand48"
			randbits=48
			randseedtype=long
			;;
		rand|random)
			case "$randbits" in
			'')
echo "Checking to see how many bits your $randfunc() function produces..." >&4
				$cat >try.c <<EOCP
#$i_unistd I_UNISTD
#$i_stdlib I_STDLIB
#include <stdio.h>
#ifdef I_UNISTD
#  include <unistd.h>
#endif
#ifdef I_STDLIB
#  include <stdlib.h>
#endif
int main()
{
	register int i;
	register unsigned long tmp;
	register unsigned long max = 0L;

	for (i = 1000; i; i--) {
		tmp = (unsigned long) $randfunc();
		if (tmp > max) max = tmp;
	}
	for (i = 0; max; i++)
		max /= 2;
	printf("%d\n",i);
}
EOCP
				set try
				if eval $compile_ok; then
					dflt=`try`
				else
					dflt='?'
					echo "(I can't seem to compile the test program...)"
				fi
				;;
			*)
				dflt="$randbits"
				;;
			esac
			rp="How many bits does your $randfunc() function produce?"
			. ./myread
			randbits="$ans"
			$rm -f try.c try
			drand01="($randfunc() / (double) ((unsigned long)1 << $randbits))"
			seedfunc="s$randfunc"
			randseedtype=unsigned
			;;
		*)
			dflt="31"
			rp="How many bits does your $randfunc() function produce?"
			. ./myread
			randbits="$ans"
			seedfunc="s$randfunc"
			drand01="($randfunc() / (double) ((unsigned long)1 << $randbits))"
			if set $seedfunc val -f; eval $csym; $val; then
				echo "(Using $seedfunc() to seed random generator)"
			else
				echo "(Warning: no $seedfunc() to seed random generator)"
				seedfunc=rand
			fi
			randseedtype=unsigned
			;;
		esac
		;;
	esac
done

echo " "
echo "Determining whether or not we are on an EBCDIC system..." >&4
$cat >tebcdic.c <<'EOM'
int main()
{
  if ('M'==0xd4) return 0;
  return 1;
}
EOM

val=$undef
set tebcdic
if eval $compile_ok; then
	if ./tebcdic; then
		echo "You seem to speak EBCDIC." >&4
		val="$define"
	else
		echo "Nope, no EBCDIC, probably ASCII or some ISO Latin. Or UTF8." >&4
	fi
else
	echo "I'm unable to compile the test program." >&4
	echo "I'll assume ASCII or some ISO Latin. Or UTF8." >&4
fi
$rm -f tebcdic.c tebcdic
set ebcdic
eval $setvar

echo " "
$cat >&4 <<EOM
Checking how to flush all pending stdio output...
EOM
# I only know how to find the first 32 possibly open files on SunOS.
# See also hints/sunos_4_1.sh and util.c  --AD
case "$osname" in
sunos) $echo '#define PERL_FFLUSH_ALL_FOPEN_MAX 32' > try.c ;;
esac
$cat >>try.c <<EOCP
#include <stdio.h>
#$i_unistd I_UNISTD
#ifdef I_UNISTD
# include <unistd.h>
#endif
#$d_sysconf HAS_SYSCONF
#$d_stdio_stream_array HAS_STDIO_STREAM_ARRAY
#ifdef HAS_STDIO_STREAM_ARRAY
# define STDIO_STREAM_ARRAY $stdio_stream_array
#endif
int main() {
  FILE* p = fopen("try.out", "w");
#ifdef TRY_FPUTC
  fputc('x', p);
#else
# ifdef TRY_FPRINTF
  fprintf(p, "x");
# endif
#endif
#ifdef TRY_FFLUSH_NULL
  fflush(NULL);
#endif
#ifdef TRY_FFLUSH_ALL
  {
    long open_max = -1;
# ifdef PERL_FFLUSH_ALL_FOPEN_MAX
    open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
# else
#  if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
    open_max = sysconf(_SC_OPEN_MAX);
#  else
#   ifdef FOPEN_MAX
    open_max = FOPEN_MAX;
#   else
#    ifdef OPEN_MAX
    open_max = OPEN_MAX;
#    else
#     ifdef _NFILE
    open_max = _NFILE;
#     endif
#    endif
#   endif
#  endif
# endif 
# ifdef HAS_STDIO_STREAM_ARRAY
    if (open_max > 0) {
      long i;
      for (i = 0; i < open_max; i++)
	    if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
		STDIO_STREAM_ARRAY[i]._file < open_max &&
		STDIO_STREAM_ARRAY[i]._flag)
		fflush(&STDIO_STREAM_ARRAY[i]);
    }	
  }
# endif
#endif
  _exit(42);
}
EOCP
: first we have to find out how _not_ to flush
if $test "X$fflushNULL" = X -o "X$fflushall" = X; then
    output=''
    set try -DTRY_FPUTC
    if eval $compile; then
	    $rm -f try.out
 	    ./try$exe_ext 2>/dev/null
	    if $test ! -s try.out -a "X$?" = X42; then
		output=-DTRY_FPUTC
	    fi
    fi
    case "$output" in
    '')
	    set try -DTRY_FPRINTF
	    $rm -f try.out
	    if eval $compile; then
		    $rm -f try.out
 		    ./try$exe_ext 2>/dev/null
		    if $test ! -s try.out -a "X$?" = X42; then
			output=-DTRY_FPRINTF
		    fi
	    fi
	;;
    esac
fi
: check for fflush NULL behaviour
case "$fflushNULL" in
'') 	set try -DTRY_FFLUSH_NULL $output
	if eval $compile; then
	        $rm -f try.out
	    	./try$exe_ext 2>/dev/null
		code="$?"
		if $test -s try.out -a "X$code" = X42; then
			fflushNULL="`$cat try.out`"
		else
			if $test "X$code" != X42; then
				$cat >&4 <<EOM
(If this test failed, don't worry, we'll try another method shortly.)
EOM
			fi
		fi
	fi
	$rm -f core try.core core.try.*
	case "$fflushNULL" in
	x)	$cat >&4 <<EOM
Your fflush(NULL) works okay for output streams.
Let's see if it clobbers input pipes...
EOM
# As of mid-March 2000 all versions of Solaris appear to have a stdio
# bug that improperly flushes the input end of pipes.  So we avoid the
# autoflush on fork/system/exec support for now. :-(
$cat >tryp.c <<EOCP
#include <stdio.h>
int
main(int argc, char **argv)
{
    char buf[1024];
    int i;
    char *bp = buf;
    while (1) {
        while ((i = getc(stdin)) != -1
               && (*bp++ = i) != '\n'
               && bp < &buf[1024])
    	/* DO NOTHING */ ;
        *bp = '\0';
        fprintf(stdout, "%s", buf);
        fflush(NULL);
        if (i == -1)
	    return 0;
        bp = buf;
    }
}
EOCP
                fflushNULL="$define"
                set tryp
                if eval $compile; then
                    $rm -f tryp.out
                    $cat tryp.c | ./tryp$exe_ext 2>/dev/null > tryp.out
                    if cmp tryp.c tryp.out >/dev/null 2>&1; then
                       $cat >&4 <<EOM
fflush(NULL) seems to behave okay with input streams.
EOM
			fflushNULL="$define"
                    else
			$cat >&4 <<EOM
Ouch, fflush(NULL) clobbers input pipes!  We will not use it.
EOM
                        fflushNULL="$undef"
                    fi
                fi
	        $rm -f core tryp.c tryp.core core.tryp.*
		;;
	'')	$cat >&4 <<EOM
Your fflush(NULL) isn't working (contrary to ANSI C).
EOM
		fflushNULL="$undef"
		;;
	*)	$cat >&4 <<EOM
Cannot figure out whether your fflush(NULL) works or not.
I'm assuming it doesn't (contrary to ANSI C).
EOM
		fflushNULL="$undef"
		;;
	esac
	;;
$define|true|[yY]*)
	fflushNULL="$define"
	;;
*)
	fflushNULL="$undef"
	;;
esac
: check explicit looping only if NULL did not work, and if the pipe
: bug does not show up on an explicit flush too
case "$fflushNULL" in
"$undef")
	$cat >tryp.c <<EOCP
#include <stdio.h>
int
main(int argc, char **argv)
{
    char buf[1024];
    int i;
    char *bp = buf;
    while (1) {
	while ((i = getc(stdin)) != -1
	       && (*bp++ = i) != '\n'
	       && bp < &buf[1024])
	/* DO NOTHING */ ;
	*bp = '\0';
	fprintf(stdout, "%s", buf);
	fflush(stdin);
	if (i == -1)
	    return 0;
	bp = buf;
    }
}
EOCP
	set tryp
	if eval $compile; then
	    $rm -f tryp.out
	    $cat tryp.c | ./tryp$exe_ext 2>/dev/null > tryp.out
	    if cmp tryp.c tryp.out >/dev/null 2>&1; then
	       $cat >&4 <<EOM
Good, at least fflush(stdin) seems to behave okay when stdin is a pipe.
EOM
		: now check for fflushall behaviour
		case "$fflushall" in
		'') 	set try -DTRY_FFLUSH_ALL $output
			if eval $compile; then
				$cat >&4 <<EOM
(Now testing the other method--but note that this also may fail.)
EOM
				$rm -f try.out
				./try$exe_ext 2>/dev/null
				if $test -s try.out -a "X$?" = X42; then
					fflushall="`$cat try.out`"
				fi
			fi
			$rm -f core try.core core.try.*
			case "$fflushall" in
			x)	$cat >&4 <<EOM
Whew. Flushing explicitly all the stdio streams works.
EOM
				fflushall="$define"
				;;
			'')	$cat >&4 <<EOM
Sigh. Flushing explicitly all the stdio streams doesn't work.
EOM
				fflushall="$undef"
				;;
			*)	$cat >&4 <<EOM
Cannot figure out whether flushing stdio streams explicitly works or not.
I'm assuming it doesn't.
EOM
				fflushall="$undef"
				;;
			esac
			;;
		"$define"|true|[yY]*)
			fflushall="$define"
			;;
		*)
			fflushall="$undef"
			;;
		esac
	    else
		$cat >&4 <<EOM
All is futile.  Even fflush(stdin) clobbers input pipes!
EOM
		fflushall="$undef"
	    fi
	else
	    fflushall="$undef"
	fi
	$rm -f core tryp.c tryp.core core.tryp.*
	;;
*)	fflushall="$undef"
	;;
esac

case "$fflushNULL$fflushall" in
undefundef)
	$cat <<EOM
OK, I give up.  I cannot figure out how to flush pending stdio output.
We won't be flushing handles at all before fork/exec/popen.
EOM
	;;
esac
$rm -f try.* try$exe_ext

: Store the full pathname to the ar program for use in the C program
: Respect a hint or command line value for full_ar.
case "$full_ar" in
'') full_ar=$ar ;;
esac

: Store the full pathname to the sed program for use in the C program
full_sed=$sed

: see what type gids are declared as in the kernel
echo " "
echo "Looking for the type for group ids returned by getgid()."
set gid_t gidtype xxx stdio.h sys/types.h
eval $typedef
case "$gidtype" in
xxx)
	xxx=`./findhdr sys/user.h`
	set `grep 'groups\[NGROUPS\];' "$xxx" 2>/dev/null` unsigned short
	case $1 in
	unsigned) dflt="$1 $2" ;;
	*) dflt="$1" ;;
	esac
	;;
*) dflt="$gidtype";;
esac
case "$gidtype" in
gid_t) echo "gid_t found." ;;
*)	rp="What is the type for group ids returned by getgid()?"
	. ./myread
	gidtype="$ans"
	;;
esac

echo " "
case "$gidtype" in
*_t) zzz="$gidtype"	;;
*)   zzz="gid"		;;
esac
echo "Checking the size of $zzz..." >&4 
cat > try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
int main() {
    printf("%d\n", (int)sizeof($gidtype));
    exit(0);
}
EOCP
set try
if eval $compile_ok; then
	yyy=`./try`
	case "$yyy" in
	'')	gidsize=4
		echo "(I can't execute the test program--guessing $gidsize.)" >&4
		;;
	*)	gidsize=$yyy
		echo "Your $zzz is $gidsize bytes long."
		;;
	esac
else
	gidsize=4
	echo "(I can't compile the test program--guessing $gidsize.)" >&4
fi


echo " "
case "$gidtype" in
*_t) zzz="$gidtype"	;;
*)   zzz="gid"		;;
esac
echo "Checking the sign of $zzz..." >&4 
cat > try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
int main() {
	$gidtype foo = -1;
	if (foo < 0)
		printf("-1\n");
	else
		printf("1\n");
}
EOCP
set try
if eval $compile; then
	yyy=`./try`
	case "$yyy" in
	'')	gidsign=1
		echo "(I can't execute the test program--guessing unsigned.)" >&4
		;;
	*)	gidsign=$yyy
		case "$gidsign" in
		 1) echo "Your $zzz is unsigned." ;;
		-1) echo "Your $zzz is signed."   ;;
		esac
		;;
	esac
else
	gidsign=1
	echo "(I can't compile the test program--guessing unsigned.)" >&4
fi


echo " "

if $test X"$quadtype" != X; then

echo "Checking how to print 64-bit integers..." >&4

if $test X"$sPRId64" = X -a X"$quadtype" = Xint; then
	$cat >try.c <<'EOCP'
#include <sys/types.h>
#include <stdio.h>
int main() {
  int q = 12345678901;
  printf("%ld\n", q);
}
EOCP
	set try
	if eval $compile; then
		yyy=`./try$exe_ext`
		case "$yyy" in
		12345678901)
			sPRId64='"d"'; sPRIi64='"i"'; sPRIu64='"u"';
                	sPRIo64='"o"'; sPRIx64='"x"'; sPRIXU64='"X"';
			echo "We will use %d."
			;;
		esac
	fi
fi

if $test X"$sPRId64" = X -a X"$quadtype" = Xlong; then
	$cat >try.c <<'EOCP'
#include <sys/types.h>
#include <stdio.h>
int main() {
  long q = 12345678901;
  printf("%ld\n", q);
}
EOCP
	set try
	if eval $compile; then
		yyy=`./try$exe_ext`
		case "$yyy" in
		12345678901)
			sPRId64='"ld"'; sPRIi64='"li"'; sPRIu64='"lu"';
                	sPRIo64='"lo"'; sPRIx64='"lx"'; sPRIXU64='"lX"';
			echo "We will use %ld."
			;;
		esac
	fi
fi

if $test X"$sPRId64" = X -a X"$i_inttypes" = X"$define" -a X"$quadtype" = Xint64_t; then
	$cat >try.c <<'EOCP'
#include <sys/types.h>
#include <inttypes.h>
#include <stdio.h>
int main() {
  int64_t q = 12345678901;
  printf("%" PRId64 "\n", q);
}
EOCP
	set try
	if eval $compile; then
		yyy=`./try$exe_ext`
		case "$yyy" in
		12345678901)
			sPRId64=PRId64; sPRIi64=PRIi64; sPRIu64=PRIu64;
                	sPRIo64=PRIo64; sPRIx64=PRIx64; sPRIXU64=PRIXU64;
			echo "We will use the C9X style."
			;;
		esac
	fi
fi

if $test X"$sPRId64" = X -a X"$quadtype" = X"long long"; then
	$cat >try.c <<'EOCP'
#include <sys/types.h>
#include <stdio.h>
int main() {
  long long q = 12345678901LL; /* AIX cc requires the LL suffix. */
  printf("%lld\n", q);
}
EOCP
	set try
	if eval $compile; then
		yyy=`./try$exe_ext`
		case "$yyy" in
		12345678901)
			sPRId64='"lld"'; sPRIi64='"lli"'; sPRIu64='"llu"';
                	sPRIo64='"llo"'; sPRIx64='"llx"'; sPRIXU64='"llX"';
			echo "We will use the %lld style."
			;;
		esac
	fi
fi

if $test X"$sPRId64" = X -a X"$quadtype" != X; then
	$cat >try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
int main() {
  $quadtype q = 12345678901;
  printf("%Ld\n", q);
}
EOCP
	set try
	if eval $compile; then
		yyy=`./try$exe_ext`
		case "$yyy" in
		12345678901)
			sPRId64='"Ld"'; sPRIi64='"Li"'; sPRIu64='"Lu"';
                	sPRIo64='"Lo"'; sPRIx64='"Lx"'; sPRIXU64='"LX"';
			echo "We will use %Ld."
			;;
		esac
	fi
fi

if $test X"$sPRId64" = X -a X"$quadtype" != X; then
	$cat >try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
int main() {
  $quadtype q = 12345678901;
  printf("%qd\n", q);
}
EOCP
	set try
	if eval $compile; then
		yyy=`./try$exe_ext`
		case "$yyy" in
		12345678901)
			sPRId64='"qd"'; sPRIi64='"qi"'; sPRIu64='"qu"';
                	sPRIo64='"qo"'; sPRIx64='"qx"'; sPRIXU64='"qX"';
			echo "We will use %qd."
			;;
		esac
	fi
fi

if $test X"$sPRId64" = X; then
	echo "Cannot figure out how to print 64-bit integers." >&4
fi

$rm -f try try.*

fi

case "$sPRId64" in
'')	d_PRId64="$undef"; d_PRIi64="$undef"; d_PRIu64="$undef"; 
	d_PRIo64="$undef"; d_PRIx64="$undef"; d_PRIXU64="$undef"; 
	;;
*)	d_PRId64="$define"; d_PRIi64="$define"; d_PRIu64="$define"; 
	d_PRIo64="$define"; d_PRIx64="$define"; d_PRIXU64="$define"; 
	;;
esac


echo " "
$echo "Checking the format strings to be used for Perl's internal types..." >&4

if $test X"$ivsize" = X8; then
	ivdformat="$sPRId64"
	uvuformat="$sPRIu64"
	uvoformat="$sPRIo64"
	uvxformat="$sPRIx64"
	uvXUformat="$sPRIXU64"
else
	if $test X"$ivsize" = X"$longsize"; then
		ivdformat='"ld"'
		uvuformat='"lu"'
		uvoformat='"lo"'
		uvxformat='"lx"'
		uvXUformat='"lX"'
	else
		if $test X"$ivsize" = X"$intsize"; then
			ivdformat='"d"'
			uvuformat='"u"'
			uvoformat='"o"'
			uvxformat='"x"'
			uvXUformat='"X"'
		else
			: far out
			if $test X"$ivsize" = X"$shortsize"; then
				ivdformat='"hd"'
				uvuformat='"hu"'
				uvoformat='"ho"'
				uvxformat='"hx"'
				uvXUformat='"hX"'
			fi
		fi
	fi
fi

if $test X"$uselongdouble" = X"$define" -a X"$d_longdbl" = X"$define" -a X"$d_PRIgldbl" = X"$define"; then
	nveformat="$sPRIeldbl"
	nvfformat="$sPRIfldbl"
	nvgformat="$sPRIgldbl"
	nvEUformat="$sPRIEUldbl"
	nvFUformat="$sPRIFUldbl"
	nvGUformat="$sPRIGUldbl"
else
	nveformat='"e"'
	nvfformat='"f"'
	nvgformat='"g"'
	nvEUformat='"E"'
	nvFUformat='"F"'
	nvGUformat='"G"'
fi

case "$ivdformat" in
'') echo "$0: Fatal: failed to find format strings, cannot continue." >& 4
    exit 1
    ;;
esac


echo " "
$echo "Checking the format string to be used for gids..." >&4

case "$gidsign" in
-1)	if $test X"$gidsize" = X"$ivsize"; then
		gidformat="$ivdformat"
	else
		if $test X"$gidsize" = X"$longsize"; then
			gidformat='"ld"'
		else
			if $test X"$gidsize" = X"$intsize"; then
				gidformat='"d"'
			else
				if $test X"$gidsize" = X"$shortsize"; then
					gidformat='"hd"'
				fi
			fi
		fi
	fi
	;;
*)	if $test X"$gidsize" = X"$uvsize"; then
		gidformat="$uvuformat"
	else
		if $test X"$gidsize" = X"$longsize"; then
			gidformat='"lu"'
		else
			if $test X"$gidsize" = X"$intsize"; then
				gidformat='"u"'
			else
				if $test X"$gidsize" = X"$shortsize"; then
					gidformat='"hu"'
				fi
			fi
		fi
	fi
	;;
esac

: see if getgroups exists
set getgroups d_getgrps
eval $inlibc

: see if setgroups exists
set setgroups d_setgrps
eval $inlibc


: Find type of 2nd arg to 'getgroups()' and 'setgroups()'
echo " "
case "$d_getgrps$d_setgrps" in
*define*)
	case "$groupstype" in
	'') dflt="$gidtype" ;;
	*)  dflt="$groupstype" ;;
	esac
	$cat <<EOM
What type of pointer is the second argument to getgroups() and setgroups()?
Usually this is the same as group ids, $gidtype, but not always.

EOM
	rp='What type pointer is the second argument to getgroups() and setgroups()?'
	. ./myread
	groupstype="$ans"
	;;
*)  groupstype="$gidtype";;
esac

echo " "
echo "Checking if your $make program sets \$(MAKE)..." >&4
case "$make_set_make" in
'')
	$sed 's/^X //' > testmake.mak << 'EOF'
Xall:
X 	@echo 'maketemp="$(MAKE)"'
EOF
	case "`$make -f testmake.mak 2>/dev/null`" in
	*maketemp=*) make_set_make='#' ;;
	*)	make_set_make="MAKE=$make" ;;
	esac
	$rm -f testmake.mak
	;;
esac
case "$make_set_make" in
'#') echo "Yup, it does.";;
*) echo "Nope, it doesn't.";;
esac

: see what type is used for mode_t
rp="What is the type used for file modes for system calls (e.g. fchmod())?"
set mode_t modetype int stdio.h sys/types.h
eval $typedef_ask

: define a fucntion to check prototypes
$cat > protochk <<EOSH
$startsh
cc="$cc"
optimize="$optimize"
ccflags="$ccflags"
prototype="$prototype"
define="$define"
rm=$rm
EOSH

$cat >> protochk <<'EOSH'

$rm -f try.c
foo="$1"
shift
while test $# -ge 2; do
	case "$1" in
		$define) echo "#include <$2>" >> try.c ;;
		literal) echo "$2" >> try.c ;;
	esac
    shift 2
done
test "$prototype" = "$define"  && echo '#define CAN_PROTOTYPE' >> try.c
cat >> try.c <<'EOCP'
#ifdef CAN_PROTOTYPE
#define	_(args) args
#else
#define	_(args) ()
#endif
EOCP
echo "$foo" >> try.c
echo 'int no_real_function_has_this_name _((void)) { return 0; }' >> try.c
$cc $optimize $ccflags -c try.c > /dev/null 2>&1
status=$?
$rm -f try.[co]
exit $status
EOSH
chmod +x protochk
$eunicefix protochk

: see what type is used for size_t
rp="What is the type used for the length parameter for string functions?"
set size_t sizetype 'unsigned int' stdio.h sys/types.h
eval $typedef_ask

: check for type of arguments to gethostbyaddr. 
if test "X$netdb_host_type" = X -o "X$netdb_hlen_type" = X; then
	case "$d_gethbyaddr" in
	$define)
		$cat <<EOM

Checking to see what type of arguments are accepted by gethostbyaddr().
EOM
		hdrs="$define sys/types.h
			$d_socket sys/socket.h 
			$i_niin netinet/in.h 
			$i_netdb netdb.h
			$i_unistd unistd.h"
		: The first arg can 'char *' or 'void *'
		: The second arg is some of integral type
		for xxx in in_addr_t 'const void *' 'const char *' 'void *' 'char *'; do
			for yyy in size_t long int; do
				case "$netdb_host_type" in
				'')	try="extern struct hostent *gethostbyaddr($xxx, $yyy, int);"
					if ./protochk "$try" $hdrs; then
						echo "Your system accepts $xxx for the first arg."
						echo "...and $yyy for the second arg."
						netdb_host_type="$xxx"
						netdb_hlen_type="$yyy"
					fi
					;;
				esac
			done
		done
		: In case none of those worked, prompt the user.
		case "$netdb_host_type" in
		'')	rp='What is the type for the 1st argument to gethostbyaddr?'
			dflt='char *'
			. ./myread
			netdb_host_type=$ans
			rp='What is the type for the 2nd argument to gethostbyaddr?'
			dflt="$sizetype"
			. ./myread
			netdb_hlen_type=$ans
			;;
		esac
		;;
	*)	: no gethostbyaddr, so pick harmless defaults
		netdb_host_type='char *'
		netdb_hlen_type="$sizetype"
		;;
	esac
	# Remove the "const" if needed. -- but then we'll have a 
	# prototype clash!
	# netdb_host_type=`echo "$netdb_host_type" | sed 's/^const //'`
fi

: check for type of argument to gethostbyname. 
if test "X$netdb_name_type" = X ; then
	case "$d_gethbyname" in
	$define)
		$cat <<EOM

Checking to see what type of argument is accepted by gethostbyname().
EOM
		hdrs="$define sys/types.h
			$d_socket sys/socket.h 
			$i_niin netinet/in.h 
			$i_netdb netdb.h
			$i_unistd unistd.h"
		for xxx in "const char *" "char *"; do
			case "$netdb_name_type" in
			'')	try="extern struct hostent *gethostbyname($xxx);"
				if ./protochk "$try" $hdrs; then
					echo "Your system accepts $xxx."
					netdb_name_type="$xxx"
				fi
				;;
			esac
		done
		: In case none of those worked, prompt the user.
		case "$netdb_name_type" in
		'')	rp='What is the type for the 1st argument to gethostbyname?'
			dflt='char *'
			. ./myread
			netdb_name_type=$ans
			;;
		esac
		;;
	*)	: no gethostbyname, so pick harmless default
		netdb_name_type='char *'
		;;
	esac
fi

: check for type of 1st argument to getnetbyaddr. 
if test "X$netdb_net_type" = X ; then
	case "$d_getnbyaddr" in
	$define)
		$cat <<EOM

Checking to see what type of 1st argument is accepted by getnetbyaddr().
EOM
		hdrs="$define sys/types.h
			$d_socket sys/socket.h 
			$i_niin netinet/in.h 
			$i_netdb netdb.h
			$i_unistd unistd.h"
		for xxx in in_addr_t "unsigned long" long "unsigned int" int; do
			case "$netdb_net_type" in
			'')	try="extern struct netent *getnetbyaddr($xxx, int);"
				if ./protochk "$try" $hdrs; then
					echo "Your system accepts $xxx."
					netdb_net_type="$xxx"
				fi
				;;
			esac
		done
		: In case none of those worked, prompt the user.
		case "$netdb_net_type" in
		'')	rp='What is the type for the 1st argument to getnetbyaddr?'
			dflt='long'
			. ./myread
			netdb_net_type=$ans
			;;
		esac
		;;
	*)	: no getnetbyaddr, so pick harmless default
		netdb_net_type='long'
		;;
	esac
fi
: locate the preferred pager for this system
case "$pager" in
'')
	dflt=''
	case "$pg" in
	/*) dflt=$pg;;
	[a-zA-Z]:/*) dflt=$pg;;
	esac
	case "$more" in
	/*) dflt=$more;;
	[a-zA-Z]:/*) dflt=$more;;
	esac
	case "$less" in
	/*) dflt=$less;;
	[a-zA-Z]:/*) dflt=$less;;
	esac
	case "$dflt" in
	'') dflt=/usr/ucb/more;;
	esac
	;;
*) dflt="$pager";;
esac
echo " "
fn=f/
rp='What pager is used on your system?'
. ./getfile
pager="$ans"

: see what type pids are declared as in the kernel
rp="What is the type of process ids on this system?"
set pid_t pidtype int stdio.h sys/types.h
eval $typedef_ask

: Find earliest binary compatible site_perl subdirectory perl can use.
case "$bincompat5005" in
"$define") xs_apiversion='5.005' ;;
*) xs_apiversion=$version ;;   # The current site_perl version.
esac
: Find earliest pure perl site_perl subdirectory perl can use.
: The versioned directories started at 5.005.
pm_apiversion='5.005'

: check for length of pointer
echo " "
case "$ptrsize" in
'')
	echo "Checking to see how big your pointers are..." >&4
	if test "$voidflags" -gt 7; then
		echo '#define VOID_PTR char *' > try.c
	else
		echo '#define VOID_PTR void *' > try.c
	fi
	$cat >>try.c <<'EOCP'
#include <stdio.h>
int main()
{
    printf("%d\n", (int)sizeof(VOID_PTR));
    exit(0);
}
EOCP
	set try
	if eval $compile_ok; then
		ptrsize=`./try`
		echo "Your pointers are $ptrsize bytes long."
	else
		dflt='4'
		echo "(I can't seem to compile the test program.  Guessing...)" >&4
		rp="What is the size of a pointer (in bytes)?"
		. ./myread
		ptrsize="$ans"
	fi
	;;
esac
$rm -f try.c try

: see if ar generates random libraries by itself
echo " "
echo "Checking how to generate random libraries on your machine..." >&4
echo 'int bar1() { return bar2(); }' > bar1.c
echo 'int bar2() { return 2; }' > bar2.c
$cat > foo.c <<'EOP'
int main() { printf("%d\n", bar1()); exit(0); }
EOP
$cc $ccflags -c bar1.c >/dev/null 2>&1
$cc $ccflags -c bar2.c >/dev/null 2>&1
$cc $ccflags -c foo.c >/dev/null 2>&1
$ar rc bar$_a bar2$_o bar1$_o >/dev/null 2>&1
if $cc -o foobar $ccflags $ldflags foo$_o bar$_a $libs > /dev/null 2>&1 &&
	./foobar >/dev/null 2>&1; then
	echo "$ar appears to generate random libraries itself."
	orderlib=false
	ranlib=":"
elif $ar ts bar$_a >/dev/null 2>&1 &&
	$cc -o foobar $ccflags $ldflags foo$_o bar$_a $libs > /dev/null 2>&1 &&
	./foobar >/dev/null 2>&1; then
		echo "a table of contents needs to be added with '$ar ts'."
		orderlib=false
		ranlib="$ar ts"
else
	case "$ranlib" in
	:) ranlib='';;
	'')
		ranlib=`./loc ranlib X /usr/bin /bin /usr/local/bin`
		$test -f $ranlib || ranlib=''
		;;
	esac
	if $test -n "$ranlib"; then
		echo "your system has '$ranlib'; we'll use that."
		orderlib=false
	else
		echo "your system doesn't seem to support random libraries"
		echo "so we'll use lorder and tsort to order the libraries."
		orderlib=true
		ranlib=":"
	fi
fi
$rm -f foo* bar* 

: check for type of arguments to select. 
case "$selecttype" in
'') case "$d_select" in
	$define)
		echo " "
		$cat <<EOM
Checking to see what type of arguments are accepted by select().
EOM
		hdrs="$define sys/types.h
			$i_systime sys/time.h 
			$i_sysselct sys/select.h
			$d_socket sys/socket.h"
		: The first arg can be int, unsigned, or size_t
		: The last arg may or may not be 'const'
		val=''
		: void pointer has been seen but using that
		: breaks the selectminbits test
		for xxx in 'fd_set *' 'int *'; do
			for nfd in 'int' 'size_t' 'unsigned long' 'unsigned' ; do
				for tmo in 'struct timeval *' 'const struct timeval *'; do
					case "$val" in
					'')	try="extern select _(($nfd, $xxx, $xxx, $xxx, $tmo));"
						if ./protochk "$try" $hdrs; then
							echo "Your system accepts $xxx."
							val="$xxx"
						fi
						;;
					esac
				done
			done
		done
		case "$val" in
		'')	rp='What is the type for the 2nd, 3rd, and 4th arguments to select?'
			case "$d_fd_set" in
				$define) dflt="fd_set *" ;;
				*)		dflt="int *" ;;
			esac
			. ./myread
			val=$ans
			;;
		esac
		selecttype="$val"
		;;
	*)	: no select, so pick a harmless default
		selecttype='int *'
		;;
	esac
	;;
esac

: check for the select 'width'
case "$selectminbits" in
'') case "$d_select" in
	$define)
		$cat <<EOM

Checking to see on how many bits at a time your select() operates...
EOM
		$cat >try.c <<EOCP
#include <sys/types.h>
#$i_time I_TIME
#$i_systime I_SYS_TIME
#$i_systimek I_SYS_TIME_KERNEL
#ifdef I_TIME
#   include <time.h>
#endif
#ifdef I_SYS_TIME
#   ifdef I_SYS_TIME_KERNEL
#	define KERNEL
#   endif
#   include <sys/time.h>
#   ifdef I_SYS_TIME_KERNEL
#	undef KERNEL
#   endif
#endif
#$i_sysselct I_SYS_SELECT
#ifdef I_SYS_SELECT
#include <sys/select.h>
#endif
#$d_socket HAS_SOCKET
#ifdef HAS_SOCKET
#   include <sys/socket.h> /* Might include <sys/bsdtypes.h> */
#endif
#include <stdio.h>
$selecttype b;
#define S sizeof(*(b))
#define MINBITS	64
#define NBYTES (S * 8 > MINBITS ? S : MINBITS/8)
#define NBITS  (NBYTES * 8)
int main() {
    char s[NBYTES];
    struct timeval t;
    int i;
    FILE* fp;
    int fd;

    fclose(stdin);
    fp = fopen("try.c", "r");
    if (fp == 0)
      exit(1);
    fd = fileno(fp);
    if (fd < 0)
      exit(2);
    b = ($selecttype)s;
    for (i = 0; i < NBITS; i++)
	FD_SET(i, b);
    t.tv_sec  = 0;
    t.tv_usec = 0;
    select(fd + 1, b, 0, 0, &t);
    for (i = NBITS - 1; i > fd && FD_ISSET(i, b); i--);
    printf("%d\n", i + 1);
    return 0;
}
EOCP
		set try
		if eval $compile_ok; then
			selectminbits=`./try`
			case "$selectminbits" in
			'')	cat >&4 <<EOM
Cannot figure out on how many bits at a time your select() operates.
I'll play safe and guess it is 32 bits.
EOM
				selectminbits=32
				bits="32 bits"
				;;
			1)	bits="1 bit" ;;
			*)	bits="$selectminbits bits" ;;
			esac
			echo "Your select() operates on $bits at a time." >&4
		else
			rp='What is the minimum number of bits your select() operates on?'
			case "$byteorder" in
			1234|12345678)	dflt=32 ;;
			*)		dflt=1	;;
			esac
			. ./myread
			val=$ans
			selectminbits="$val"
		fi
		$rm -f try.* try
		;;
	*)	: no select, so pick a harmless default
		selectminbits='32'
		;;
	esac
	;;
esac

: Trace out the files included by signal.h, then look for SIGxxx names.
: Remove SIGARRAYSIZE used by HPUX.
: Remove SIGSTKSIZE used by Linux.
: Remove SIGSTKSZ used by Posix.
: Remove SIGTYP void lines used by OS2.
: Some cpps, like os390, dont give the file name anywhere
if [ "X$fieldn" = X ]; then
	: Just make some guesses.  We check them later.
	xxx='/usr/include/signal.h /usr/include/sys/signal.h'
else
	xxx=`echo '#include <signal.h>' |
	$cppstdin $cppminus $cppflags 2>/dev/null |
	$grep '^[ 	]*#.*include' | 
	$awk "{print \\$$fieldn}" | $sed 's!"!!g' | $sort | $uniq`
fi
: Check this list of files to be sure we have parsed the cpp output ok.
: This will also avoid potentially non-existent files, such 
: as ../foo/bar.h
xxxfiles=''
for xx in $xxx /dev/null ; do
	$test -f "$xx" && xxxfiles="$xxxfiles $xx"
done
: If we have found no files, at least try signal.h
case "$xxxfiles" in
'')	xxxfiles=`./findhdr signal.h` ;;
esac
xxx=`awk '
$1 ~ /^#define$/ && $2 ~ /^SIG[A-Z0-9]*$/ && $2 !~ /SIGARRAYSIZE/ && $2 !~ /SIGSTKSIZE/ && $2 !~ /SIGSTKSZ/ && $3 !~ /void/ {
	print substr($2, 4, 20)
}
$1 == "#" && $2 ~ /^define$/ && $3 ~ /^SIG[A-Z0-9]*$/ && $3 !~ /SIGARRAYSIZE/ && $4 !~ /void/ {
	print substr($3, 4, 20)
}' $xxxfiles`
: Append some common names just in case the awk scan failed.
xxx="$xxx ABRT ALRM BUS CANCEL CHLD CLD CONT DIL EMT FPE"
xxx="$xxx FREEZE HUP ILL INT IO IOT KILL LOST LWP PHONE"
xxx="$xxx PIPE POLL PROF PWR QUIT RTMAX RTMIN SEGV STKFLT STOP"
xxx="$xxx SYS TERM THAW TRAP TSTP TTIN TTOU URG USR1 USR2"
xxx="$xxx USR3 USR4 VTALRM WAITING WINCH WIND WINDOW XCPU XFSZ"

: generate a few handy files for later
$cat > signal.c <<'EOCP'
#include <sys/types.h>
#include <signal.h>
#include <stdio.h>
int main() {

/* Strange style to avoid deeply-nested #if/#else/#endif */
#ifndef NSIG
#  ifdef _NSIG
#    define NSIG (_NSIG)
#  endif
#endif

#ifndef NSIG
#  ifdef SIGMAX
#    define NSIG (SIGMAX+1)
#  endif
#endif

#ifndef NSIG
#  ifdef SIG_MAX
#    define NSIG (SIG_MAX+1)
#  endif
#endif

#ifndef NSIG
#  ifdef MAXSIG
#    define NSIG (MAXSIG+1)
#  endif
#endif

#ifndef NSIG
#  ifdef MAX_SIG
#    define NSIG (MAX_SIG+1)
#  endif
#endif

#ifndef NSIG
#  ifdef SIGARRAYSIZE
#    define NSIG (SIGARRAYSIZE+1) /* Not sure of the +1 */
#  endif
#endif

#ifndef NSIG
#  ifdef _sys_nsig
#    define NSIG (_sys_nsig) /* Solaris 2.5 */
#  endif
#endif

/* Default to some arbitrary number that's big enough to get most
   of the common signals.
*/
#ifndef NSIG
#    define NSIG 50
#endif

printf("NSIG %d\n", NSIG);

#ifndef JUST_NSIG

EOCP

echo $xxx | $tr ' ' $trnl | $sort | $uniq | $awk '
{
	printf "#ifdef SIG"; printf $1; printf "\n"
	printf "printf(\""; printf $1; printf " %%d\\n\",SIG";
	printf $1; printf ");\n"
	printf "#endif\n"
}
END {
	printf "#endif /* JUST_NSIG */\n";
	printf "exit(0);\n}\n";
}
' >>signal.c
$cat >signal.awk <<'EOP'
BEGIN { ndups = 0 }
$1 ~ /^NSIG$/ { nsig = $2 }
($1 !~ /^NSIG$/) && (NF == 2) {
    if ($2 > maxsig) { maxsig = $2 }
    if (sig_name[$2]) {
	dup_name[ndups] = $1
	dup_num[ndups] = $2
	ndups++ 
    }
    else {
	sig_name[$2] = $1
	sig_num[$2] = $2
    }
}
END { 
    if (nsig == 0) {
    	nsig = maxsig + 1
    }
    printf("NSIG %d\n", nsig);
    for (n = 1; n < nsig; n++) {
 	if (sig_name[n]) {
 	    printf("%s %d\n", sig_name[n], sig_num[n])
	}
 	else {
 	    printf("NUM%d %d\n", n, n) 
 	}
    }
    for (n = 0; n < ndups; n++) {
 	printf("%s %d\n", dup_name[n], dup_num[n])
    }
}
EOP
$cat >signal_cmd <<EOS
$startsh
if $test -s signal.lst; then
    echo "Using your existing signal.lst file"
	exit 0
fi
xxx="$xxx"
EOS
$cat >>signal_cmd <<'EOS'

set signal
if eval $compile_ok; then
	./signal$_exe | $sort -n +1 | $uniq | $awk -f signal.awk >signal.lst
else
	echo "(I can't seem be able to compile the whole test program)" >&4
	echo "(I'll try it in little pieces.)" >&4
	set signal -DJUST_NSIG
	if eval $compile_ok; then
		./signal$_exe > signal.nsg
		$cat signal.nsg
	else
		echo "I can't seem to figure out how many signals you have." >&4
		echo "Guessing 50." >&4
		echo 'NSIG 50' > signal.nsg
	fi
	: Now look at all the signal names, one at a time.
	for xx in `echo $xxx | $tr ' ' $trnl | $sort | $uniq`; do
		$cat > signal.c <<EOCP
#include <sys/types.h>
#include <signal.h>
#include <stdio.h>
int main() {
printf("$xx %d\n", SIG${xx});
return 0;
}
EOCP
		set signal
		if eval $compile; then
			echo "SIG${xx} found."
			./signal$_exe  >> signal.ls1
		else
			echo "SIG${xx} NOT found."
		fi
	done
	if $test -s signal.ls1; then
		$cat signal.nsg signal.ls1 |
			$sort -n +1 | $uniq | $awk -f signal.awk >signal.lst
	fi

fi
if $test -s signal.lst; then
	:
else
	echo "(AAK! I can't compile the test programs -- Guessing)" >&4
	echo 'kill -l' >signal
	set X `csh -f <signal`
	$rm -f signal
	shift
	case $# in
	0) set HUP INT QUIT ILL TRAP ABRT EMT FPE KILL BUS SEGV SYS PIPE ALRM TERM;;
	esac
	echo $@ | $tr ' ' $trnl | \
 	    $awk '{ printf "%s %d\n", $1, ++s; }
 		  END { printf "NSIG %d\n", ++s }' >signal.lst
fi
$rm -f signal.c signal$_exe signal$_o signal.nsg signal.ls1
EOS
chmod a+x signal_cmd
$eunicefix signal_cmd

: generate list of signal names
echo " "
case "$sig_name_init" in
'') doinit=yes ;;
*)  case "$sig_num_init" in
    ''|*,*) doinit=yes ;;
    esac ;;
esac
case "$doinit" in
yes)
	echo "Generating a list of signal names and numbers..." >&4
	. ./signal_cmd
 	sig_count=`$awk '/^NSIG/ { printf "%d", $2 }' signal.lst`
 	sig_name=`$awk 'BEGIN { printf "ZERO " }
 			!/^NSIG/ { printf "%s ", $1 }' signal.lst`
 	sig_num=`$awk  'BEGIN { printf "0 " }
 			!/^NSIG/ { printf "%d ", $2 }' signal.lst`
 	sig_name_init=`$awk 'BEGIN	{ printf "\"ZERO\", " }
 			     !/^NSIG/	{ printf "\"%s\", ", $1 }
 			     END	{ printf "0\n" }' signal.lst`
 	sig_num_init=`$awk  'BEGIN	{ printf "0, " }
 			     !/^NSIG/	{ printf "%d, ", $2}
 			     END	{ printf "0\n"}' signal.lst`
	;;
esac
echo "The following $sig_count signals are available:"
echo " "
echo $sig_name | $awk \
'BEGIN { linelen = 0 }
{
	for (i = 1; i <= NF; i++) {
		name = "SIG" $i " "
		linelen = linelen + length(name)
		if (linelen > 70) {
			printf "\n"
			linelen = length(name)
		}
		printf "%s", name
	}
	printf "\n"
}'
$rm -f signal signal.c signal.awk signal.lst signal_cmd 

echo " "
case "$sizetype" in
*_t) zzz="$sizetype"	;;
*)   zzz="filesize"	;;
esac
echo "Checking the size of $zzz..." >&4 
cat > try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
int main() {
    printf("%d\n", (int)sizeof($sizetype));
    exit(0);
}
EOCP
set try
if eval $compile_ok; then
	yyy=`./try`
	case "$yyy" in
	'')	sizesize=4
		echo "(I can't execute the test program--guessing $sizesize.)" >&4
		;;
	*)	sizesize=$yyy
		echo "Your $zzz size is $sizesize bytes."
		;;
	esac
else
	sizesize=4
	echo "(I can't compile the test program--guessing $sizesize.)" >&4
fi


: check for socklen_t
echo " "
echo "Checking to see if you have socklen_t..." >&4
$cat >try.c <<EOCP
#include <sys/types.h>
#$d_socket HAS_SOCKET
#ifdef HAS_SOCKET
#include <sys/socket.h>
#endif
int main() { socklen_t x = 16; }
EOCP
set try
if eval $compile; then
	val="$define"
	echo "You have socklen_t."
else
	val="$undef"
	echo "You do not have socklen_t."
	case "$sizetype" in
	size_t) echo "(You do have size_t, that might work. Some people are happy with just an int.)" ;;
	esac
fi
$rm -f try try.*
set d_socklen_t
eval $setvar

: check for type of the size argument to socket calls
case "$d_socket" in
"$define")
	$cat <<EOM

Checking to see what type is the last argument of accept().
EOM
	hdrs="$define sys/types.h $d_socket sys/socket.h" 
	yyy=''
	case "$d_socklen_t" in
	"$define") yyy="$yyy socklen_t"
	esac
	yyy="$yyy $sizetype int long unsigned"
	for xxx in $yyy; do
		case "$socksizetype" in
		'')	try="extern int accept(int, struct sockaddr *, $xxx *);"
			if ./protochk "$try" $hdrs; then
				echo "Your system accepts '$xxx *' for the last argument of accept()."
				socksizetype="$xxx"
			fi
			;;
		esac
	done
: In case none of those worked, prompt the user.
	case "$socksizetype" in
	'')	rp='What is the type for socket address structure sizes?'
		dflt='int'
		. ./myread
		socksizetype=$ans
		;;
	esac
	;;
*)	: no sockets, so pick relatively harmless default
	socksizetype='int'
	;;
esac

: see what type is used for signed size_t
set ssize_t ssizetype int stdio.h sys/types.h
eval $typedef
dflt="$ssizetype"
$cat > ssize.c <<EOM
#include <stdio.h>
#include <sys/types.h>
#define Size_t $sizetype
#define SSize_t $dflt
int main()
{
	if (sizeof(Size_t) == sizeof(SSize_t))
		printf("$dflt\n");
	else if (sizeof(Size_t) == sizeof(int))
		printf("int\n");
	else 
		printf("long\n");
	exit(0);
}
EOM
echo " "
set ssize
if eval $compile_ok && ./ssize > /dev/null; then
	ssizetype=`./ssize`
	echo "I'll be using $ssizetype for functions returning a byte count." >&4
else
	$cat >&4 <<EOM
Help! I can't compile and run the ssize_t test program: please enlighten me!
(This is probably a misconfiguration in your system or libraries, and
you really ought to fix it.  Still, I'll try anyway.)

I need a type that is the same size as $sizetype, but is guaranteed to
be signed.  Common values are ssize_t, int and long.

EOM
	rp="What signed type is the same size as $sizetype?"
	. ./myread
	ssizetype="$ans"
fi
$rm -f ssize ssize.*

: see what type of char stdio uses.
echo " "
if $contains 'unsigned.*char.*_ptr;' `./findhdr stdio.h` >/dev/null 2>&1 ; then
	echo "Your stdio uses unsigned chars." >&4
	stdchar="unsigned char"
else
	echo "Your stdio uses signed chars." >&4
	stdchar="char"
fi

: see if time exists
echo " "
if test "X$d_time" = X -o X"$timetype" = X; then
    if set time val -f d_time; eval $csym; $val; then
		echo 'time() found.' >&4
		val="$define"
		rp="What is the type returned by time() on this system?"
		set time_t timetype long stdio.h sys/types.h
		eval $typedef_ask
    else
		echo 'time() not found, hope that will do.' >&4
		val="$undef"
		timetype='int';
    fi
    set d_time
    eval $setvar
fi

: see what type uids are declared as in the kernel
echo " "
echo "Looking for the type for user ids returned by getuid()."
set uid_t uidtype xxx stdio.h sys/types.h
eval $typedef
case "$uidtype" in
xxx)
	xxx=`./findhdr sys/user.h`
	set `grep '_ruid;' "$xxx" 2>/dev/null` unsigned short
	case $1 in
	unsigned) dflt="$1 $2" ;;
	*) dflt="$1" ;;
	esac
	;;
*) dflt="$uidtype";;
esac
case "$uidtype" in
uid_t)	echo "uid_t found." ;;
*)	rp="What is the type for user ids returned by getuid()?"
	. ./myread
	uidtype="$ans"
	;;
esac

echo " "
case "$uidtype" in
*_t) zzz="$uidtype"	;;
*)   zzz="uid"		;;
esac
echo "Checking the size of $zzz..." >&4 
cat > try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
int main() {
    printf("%d\n", (int)sizeof($uidtype));
    exit(0);
}
EOCP
set try
if eval $compile_ok; then
	yyy=`./try`
	case "$yyy" in
	'')	uidsize=4
		echo "(I can't execute the test program--guessing $uidsize.)" >&4
		;;
	*)	uidsize=$yyy
		echo "Your $zzz is $uidsize bytes long."
		;;
	esac
else
	uidsize=4
	echo "(I can't compile the test program--guessing $uidsize.)" >&4
fi

echo " "
case "$uidtype" in
*_t) zzz="$uidtype"	;;
*)   zzz="uid"		;;
esac
echo "Checking the sign of $zzz..." >&4
cat > try.c <<EOCP
#include <sys/types.h>
#include <stdio.h>
int main() {
	$uidtype foo = -1;
	if (foo < 0)
		printf("-1\n");
	else
		printf("1\n");
}
EOCP
set try
if eval $compile; then
	yyy=`./try`
	case "$yyy" in
	'')	uidsign=1
		echo "(I can't execute the test program--guessing unsigned.)" >&4
		;;
	*)	uidsign=$yyy
		case "$uidsign" in
		 1) echo "Your $zzz is unsigned." ;;
		-1) echo "Your $zzz is signed."   ;;
		esac
		;;
	esac
else
	uidsign=1
	echo "(I can't compile the test program--guessing unsigned.)" >&4
fi



echo " "
$echo "Checking the format string to be used for uids..." >&4

case "$uidsign" in
-1)	if $test X"$uidsize" = X"$ivsize"; then
		uidformat="$ivdformat"
	else
		if $test X"$uidsize" = X"$longsize"; then
			uidformat='"ld"'
		else
			if $test X"$uidsize" = X"$intsize"; then
				uidformat='"d"'
			else
				if $test X"$uidsize" = X"$shortsize"; then
					uidformat='"hd"'
				fi
			fi
		fi
	fi
	;;
*)	if $test X"$uidsize" = X"$uvsize"; then
		uidformat="$uvuformat"
	else
		if $test X"$uidsize" = X"$longsize"; then
			uidformat='"lu"'
		else
			if $test X"$uidsize" = X"$intsize"; then
				uidformat='"u"'
			else
				if $test X"$uidsize" = X"$shortsize"; then
					uidformat='"hu"'
				fi
			fi
		fi
	fi
	;;
esac

: see if dbm.h is available
: see if dbmclose exists
set dbmclose d_dbmclose
eval $inlibc

case "$d_dbmclose" in
$define)
	set dbm.h i_dbm
	eval $inhdr
	case "$i_dbm" in
	$define)
		val="$undef"
		set i_rpcsvcdbm
		eval $setvar
		;;
	*)	set rpcsvc/dbm.h i_rpcsvcdbm
		eval $inhdr
		;;
	esac
	;;
*)	echo "We won't be including <dbm.h>"
	val="$undef"
	set i_dbm
	eval $setvar
	val="$undef"
	set i_rpcsvcdbm
	eval $setvar
	;;
esac

: see if this is a sys/file.h system
val=''
set sys/file.h val
eval $inhdr

: do we need to include sys/file.h ?
case "$val" in
"$define")
	echo " "
	if $h_sysfile; then
		val="$define"
		echo "We'll be including <sys/file.h>." >&4
	else
		val="$undef"
		echo "We won't be including <sys/file.h>." >&4
	fi
	;;
*)
	h_sysfile=false
	;;
esac
set i_sysfile
eval $setvar

: see if fcntl.h is there
val=''
set fcntl.h val
eval $inhdr

: see if we can include fcntl.h
case "$val" in
"$define")
	echo " "
	if $h_fcntl; then
		val="$define"
		echo "We'll be including <fcntl.h>." >&4
	else
		val="$undef"
		if $h_sysfile; then
	echo "We don't need to include <fcntl.h> if we include <sys/file.h>." >&4
		else
			echo "We won't be including <fcntl.h>." >&4
		fi
	fi
	;;
*)
	h_fcntl=false
	val="$undef"
	;;
esac
set i_fcntl
eval $setvar

: see if this is a iconv.h system
set iconv.h i_iconv
eval $inhdr

: see if this is a ieeefp.h system
set ieeefp.h i_ieeefp
eval $inhdr

: see if this is a libutil.h system
set libutil.h i_libutil
eval $inhdr

: see if locale.h is available
set locale.h i_locale
eval $inhdr

: see if mach cthreads are available
if test "X$usethreads" = "X$define"; then
	set mach/cthreads.h i_machcthr
	eval $inhdr
else
	i_machcthr="$undef"
fi



: see if this is a math.h system
set math.h i_math
eval $inhdr

: see if this is a mntent.h system
set mntent.h i_mntent
eval $inhdr

: see if ndbm.h is available
set ndbm.h t_ndbm
eval $inhdr
case "$t_ndbm" in
$define)
	: see if dbm_open exists
	set dbm_open d_dbm_open
	eval $inlibc
	case "$d_dbm_open" in
	$undef)
		t_ndbm="$undef"
		echo "We won't be including <ndbm.h>"
		;;
	esac
	;;
esac
val="$t_ndbm"
set i_ndbm
eval $setvar

: see if net/errno.h is available
val=''
set net/errno.h val
eval $inhdr

: Unfortunately, it causes problems on some systems.  Arrgh.
case "$val" in
$define)
	cat > try.c <<'EOM'
#include <stdio.h>
#include <errno.h>
#include <net/errno.h>
int func()
{
	return ENOTSOCK;
}
EOM
	if $cc $ccflags -c try.c >/dev/null 2>&1; then
		echo "We'll be including <net/errno.h>." >&4
	else
		echo "We won't be including <net/errno.h>." >&4
		val="$undef"
	fi
	$rm -f try.* try
	;;
esac
set i_neterrno
eval $setvar

: see if netinet/tcp.h is available
set netinet/tcp.h i_netinettcp
eval $inhdr

: see if this is a poll.h system
set poll.h i_poll
eval $inhdr

: see if this is a prot.h system
set prot.h i_prot
eval $inhdr

echo " "
$echo "Guessing which symbols your C compiler and preprocessor define..." >&4 
$cat <<'EOSH' > Cppsym.know
a29k ABI64 aegis AES_SOURCE AIX AIX32 AIX370
AIX41 AIX42 AIX43 AIX_SOURCE aixpc ALL_SOURCE
alliant alpha am29000 AM29000 amiga AMIGAOS AMIX
ansi ANSI_C_SOURCE apollo ardent atarist att386 att3b BeOS
BIG_ENDIAN BIT_MSF bsd BSD bsd43 bsd4_2 bsd4_3 BSD4_3 bsd4_4
BSD_4_3 BSD_4_4 BSD_NET2 BSD_TIME BSD_TYPES BSDCOMPAT bsdi
bull c cadmus clipper CMU COFF COMPILER_VERSION
concurrent convex cpu cray CRAY CRAYMPP ctix CX_UX
CYGWIN DGUX DGUX_SOURCE DJGPP dmert DOLPHIN DPX2 DSO
Dynix DynixPTX ELF encore EPI EXTENSIONS FILE_OFFSET_BITS
FreeBSD GCC_NEW_VARARGS gcos gcx gimpel
GNU_SOURCE GNUC GNUC_MINOR GO32 gould GOULD_PN
H3050R H3050RX hbullx20 hcx host_mips
hp200 hp300 hp700 HP700 hp800 hp9000
hp9000s200 hp9000s300 hp9000s400 hp9000s500
hp9000s700 hp9000s800 hp9k8 hp_osf hppa hpux HPUX_SOURCE
i186 i286 i386 i486 i586 i686 i8086 i80960 i860 I960
iAPX286 ibm ibm032 ibmesa IBMR2 ibmrt ILP32 ILP64
INLINE_INTRINSICS INTRINSICS INT64 interdata is68k ksr1
LANGUAGE_C LARGE_FILE_API LARGEFILE64_SOURCE
LARGEFILE_SOURCE LFS64_LARGEFILE LFS_LARGEFILE
Linux LITTLE_ENDIAN LONG64 LONG_DOUBLE LONG_LONG
LONGDOUBLE LONGLONG LP64 luna luna88k Lynx
M68000 m68k m88100 m88k M88KBCS_TARGET M_COFF
M_I186 M_I286 M_I386 M_I8086 M_I86 M_I86SM M_SYS3
M_SYS5 M_SYSIII M_SYSV M_UNIX M_XENIX MACH machine MachTen
MATH_HAS_NO_SIDE_EFFECTS
mc300 mc500 mc68000 mc68010 mc68020 mc68030 mc68040
mc68060 mc68k mc68k32 mc700 mc88000 mc88100 merlin
mert MiNT mips MIPS_FPSET MIPS_ISA MIPS_SIM MIPS_SZINT
MIPS_SZLONG MIPS_SZPTR MIPSEB MIPSEL MODERN_C motorola
mpeix MSDOS MTXINU MULTIMAX mvs MVS n16 ncl_el ncl_mr
NetBSD news1500 news1700 news1800 news1900 news3700
news700 news800 news900 NeXT NLS nonstopux ns16000 ns32000
ns32016 ns32332 ns32k nsc32000
OCS88 OEMVS OpenBSD os OS2 OS390 osf OSF1 OSF_SOURCE
pa_risc PA_RISC1_1 PA_RISC2_0 PARAGON parisc
pc532 pdp11 PGC PIC plexus PORTAR posix
POSIX1B_SOURCE POSIX2_SOURCE POSIX4_SOURCE
POSIX_C_SOURCE POSIX_SOURCE POWER
PROTOTYPES PWB pyr QNX R3000 REENTRANT RES Rhapsody RISC6000
riscix riscos RT scs SCO sequent sgi SGI_SOURCE sinix
SIZE_INT SIZE_LONG SIZE_PTR SOCKET_SOURCE SOCKETS_SOURCE
sony sony_news sonyrisc sparc sparclite spectrum
stardent stdc STDC_EXT stratos sun sun3 sun386
Sun386i svr3 svr4 SVR4_2 SVR4_SOURCE svr5
SX system SYSTYPE_BSD SYSTYPE_BSD43 SYSTYPE_BSD44
SYSTYPE_SVR4 SYSTYPE_SVR5 SYSTYPE_SYSV SYSV SYSV3 SYSV4 SYSV5
sysV68 sysV88 Tek4132 Tek4300 titan
tower tower32 tower32_200 tower32_600 tower32_700
tower32_800 tower32_850 tss
u370 u3b u3b2 u3b20 u3b200 u3b20d u3b5
ultrix UMAXV UnicomPBB UnicomPBD UNICOS UNICOSMK
unix UNIX95 UNIX99 unixpc unos USGr4 USGr4_2
Utek UTek UTS UWIN uxpm uxps vax venix VMESA vms xenix Xenix286
XOPEN_SOURCE XOPEN_SOURCE_EXTENDED XPG2 XPG2_EXTENDED
XPG3 XPG3_EXTENDED XPG4 XPG4_EXTENDED
z8000
EOSH
# Maybe put other stuff here too.
cat <<EOSH >>Cppsym.know
$osname
EOSH
./tr '[a-z]' '[A-Z]' < Cppsym.know > Cppsym.a
./tr '[A-Z]' '[a-z]' < Cppsym.know > Cppsym.b
$cat Cppsym.know > Cppsym.c
$cat Cppsym.a Cppsym.b Cppsym.c | $tr ' ' $trnl | $sort | $uniq > Cppsym.know
$rm -f Cppsym.a Cppsym.b Cppsym.c
cat <<EOSH > Cppsym
$startsh
if $test \$# -gt 0; then
    echo \$* | $tr " " "$trnl" | ./Cppsym.try > Cppsym.got
    if $test -s Cppsym.got; then
        $rm -f Cppsym.got
        exit 0
    fi
    $rm -f Cppsym.got
    exit 1
else
    $tr " " "$trnl" | ./Cppsym.try
    exit 0
fi
EOSH
chmod +x Cppsym
$eunicefix Cppsym
cat <<EOSH > Cppsym.try
$startsh
cat <<'EOCP' > try.c
#include <stdio.h>
int main() {
EOCP
$awk \\
EOSH
cat <<'EOSH' >> Cppsym.try
'length($1) > 0 {
    printf "#ifdef %s\n#if %s+0\nprintf(\"%s=%%ld\\n\", %s);\n#else\nprintf(\"%s\\n\");\n#endif\n#endif\n", $1, $1, $1, $1, $1
    printf "#ifdef _%s\n#if _%s+0\nprintf(\"_%s=%%ld\\n\", _%s);\n#else\nprintf(\"_%s\\n\");\n#endif\n#endif\n", $1, $1, $1, $1, $1
    printf "#ifdef __%s\n#if __%s+0\nprintf(\"__%s=%%ld\\n\", __%s);\n#else\nprintf(\"__%s\\n\");\n#endif\n#endif\n", $1, $1, $1, $1, $1
    printf "#ifdef __%s__\n#if __%s__+0\nprintf(\"__%s__=%%ld\\n\", __%s__);\n#else\nprintf(\"__%s__\\n\");\n#endif\n#endif\n", $1, $1, $1, $1, $1
}'	 >> try.c
echo '}' >> try.c
EOSH
cat <<EOSH >> Cppsym.try
ccflags="$ccflags"
case "$osname-$gccversion" in
irix-) ccflags="\$ccflags -woff 1178" ;;
os2-*) ccflags="\$ccflags -Zlinker /PM:VIO" ;;
esac
$cc -o try $optimize \$ccflags $ldflags try.c $libs && ./try$exe_ext
EOSH
chmod +x Cppsym.try
$eunicefix Cppsym.try
./Cppsym < Cppsym.know > Cppsym.true
: now check the C compiler for additional symbols
postprocess_cc_v=''
case "$osname" in
aix) postprocess_cc_v="|$tr , ' '" ;;
esac
$cat >ccsym <<EOS
$startsh
$cat >tmp.c <<EOF
extern int foo;
EOF
for i in \`$cc -v -c tmp.c 2>&1 $postprocess_cc_v\`
do
	case "\$i" in
	-D*) echo "\$i" | $sed 's/^-D//';;
	-A*) $test "$gccversion" && echo "\$i" | $sed 's/^-A\(.*\)(\(.*\))/\1=\2/';;
	esac
done
$rm -f try.c
EOS
postprocess_cc_v=''
chmod +x ccsym
$eunicefix ccsym
./ccsym > ccsym1.raw
if $test -s ccsym1.raw; then
       $sort ccsym1.raw | $uniq >ccsym.raw
else
       mv ccsym1.raw ccsym.raw
fi

$awk '/\=/ { print $0; next }
	{ print $0"=1" }' ccsym.raw >ccsym.list
$awk '/\=/ { print $0; next }
	{ print $0"=1" }' Cppsym.true >ccsym.true
$comm -13 ccsym.true ccsym.list >ccsym.own
$comm -12 ccsym.true ccsym.list >ccsym.com
$comm -23 ccsym.true ccsym.list >ccsym.cpp
also=''
if $test -z ccsym.raw; then
	echo "Your C compiler doesn't seem to define any symbols!" >&4
	echo " "
	echo "However, your C preprocessor defines the following symbols:"
	$cat Cppsym.true
    	ccsymbols=''
	cppsymbols=`$cat Cppsym.true`
        cppsymbols=`echo $cppsymbols`
	cppccsymbols="$cppsymbols"
else
	if $test -s ccsym.com; then
		echo "Your C compiler and pre-processor define these symbols:"
		$sed -e 's/\(..*\)=.*/\1/' ccsym.com
		also='also '
		symbols='ones'
		cppccsymbols=`$cat ccsym.com`
		cppccsymbols=`echo $cppccsymbols`
		$test "$silent" || sleep 1
	fi
	if $test -s ccsym.cpp; then
		$test "$also" && echo " "
		echo "Your C pre-processor ${also}defines the following symbols:"
		$sed -e 's/\(..*\)=.*/\1/' ccsym.cpp
		also='further '
		cppsymbols=`$cat ccsym.cpp`
		cppsymbols=`echo $cppsymbols`
		$test "$silent" || sleep 1
	fi
	if $test -s ccsym.own; then
		$test "$also" && echo " "
		echo "Your C compiler ${also}defines the following cpp symbols:"
		$sed -e 's/\(..*\)=1/\1/' ccsym.own
		$sed -e 's/\(..*\)=.*/\1/' ccsym.own | $uniq >>Cppsym.true
	        ccsymbols=`$cat ccsym.own`
	        ccsymbols=`echo $ccsymbols`
		$test "$silent" || sleep 1
	fi
fi
$rm -f ccsym* Cppsym.*

: see if this is a termio system
val="$undef"
val2="$undef"
val3="$undef"
if $test `./findhdr termios.h`; then
	set tcsetattr i_termios
	eval $inlibc
	val3="$i_termios"
fi
echo " "
case "$val3" in
"$define") echo "You have POSIX termios.h... good!" >&4;;
*) if ./Cppsym pyr; then
		case "`/bin/universe`" in
		ucb) if $test `./findhdr sgtty.h`; then
				val2="$define"
				echo "<sgtty.h> found." >&4
			else
				echo "System is pyramid with BSD universe."
				echo "<sgtty.h> not found--you could have problems." >&4
			fi;;
		*) if $test `./findhdr termio.h`; then
				val="$define"
				echo "<termio.h> found." >&4
			else
				echo "System is pyramid with USG universe."
				echo "<termio.h> not found--you could have problems." >&4
			fi;;
		esac
	elif ./usg; then
		if $test `./findhdr termio.h`; then
			echo "<termio.h> found." >&4
			val="$define"
		elif $test `./findhdr sgtty.h`; then
			echo "<sgtty.h> found." >&4
			val2="$define"
		else
echo "Neither <termio.h> nor <sgtty.h> found--you could have problems." >&4
		fi
	else
		if $test `./findhdr sgtty.h`; then
			echo "<sgtty.h> found." >&4
			val2="$define"
		elif $test `./findhdr termio.h`; then
			echo "<termio.h> found." >&4
			val="$define"
		else
echo "Neither <sgtty.h> nor <termio.h> found--you could have problems." >&4
		fi
	fi;;
esac
set i_termio; eval $setvar
val=$val2; set i_sgtty; eval $setvar
val=$val3; set i_termios; eval $setvar

: see if this is a shadow.h system
set shadow.h i_shadow
eval $inhdr

: see if this is a socks.h system
set socks.h i_socks
eval $inhdr

: see if stdarg is available
echo " "
if $test `./findhdr stdarg.h`; then
	echo "<stdarg.h> found." >&4
	valstd="$define"
else
	echo "<stdarg.h> NOT found." >&4
	valstd="$undef"
fi

: see if varags is available
echo " "
if $test `./findhdr varargs.h`; then
	echo "<varargs.h> found." >&4
else
	echo "<varargs.h> NOT found, but that's ok (I hope)." >&4
fi

: set up the varargs testing programs
$cat > varargs.c <<EOP
#ifdef I_STDARG
#include <stdarg.h>
#endif
#ifdef I_VARARGS
#include <varargs.h>
#endif

#ifdef I_STDARG
int f(char *p, ...)
#else
int f(va_alist)
va_dcl
#endif
{
	va_list ap;
#ifndef I_STDARG
	char *p;
#endif
#ifdef I_STDARG
	va_start(ap,p);
#else
	va_start(ap);
	p = va_arg(ap, char *);
#endif
	va_end(ap);
}
EOP
$cat > varargs <<EOP
$startsh
if $cc -c $ccflags -D\$1 varargs.c >/dev/null 2>&1; then
	echo "true"
else
	echo "false"
fi
$rm -f varargs$_o
EOP
chmod +x varargs

: now check which varargs header should be included
echo " "
i_varhdr=''
case "$valstd" in
"$define")
	if `./varargs I_STDARG`; then
		val='stdarg.h'
	elif `./varargs I_VARARGS`; then
		val='varargs.h'
	fi
	;;
*)
	if `./varargs I_VARARGS`; then
		val='varargs.h'
	fi
	;;
esac
case "$val" in
'')
echo "I could not find the definition for va_dcl... You have problems..." >&4
	val="$undef"; set i_stdarg; eval $setvar
	val="$undef"; set i_varargs; eval $setvar
	;;
*) 
	set i_varhdr
	eval $setvar
	case "$i_varhdr" in
	stdarg.h)
		val="$define"; set i_stdarg; eval $setvar
		val="$undef"; set i_varargs; eval $setvar
		;;
	varargs.h)
		val="$undef"; set i_stdarg; eval $setvar
		val="$define"; set i_varargs; eval $setvar
		;;
	esac
	echo "We'll include <$i_varhdr> to get va_dcl definition." >&4;;
esac
$rm -f varargs*

: see if stddef is available
set stddef.h i_stddef
eval $inhdr

: see if this is a sunmath.h system
set sunmath.h i_sunmath
eval $inhdr

: see if sys/access.h is available
set sys/access.h i_sysaccess
eval $inhdr

: see if ioctl defs are in sgtty, termio, sys/filio or sys/ioctl
set sys/filio.h i_sysfilio
eval $inhdr
echo " "
if $test `./findhdr sys/ioctl.h`; then
	val="$define"
	echo '<sys/ioctl.h> found.' >&4
else
	val="$undef"
	if $test $i_sysfilio = "$define"; then
	    echo '<sys/ioctl.h> NOT found.' >&4
	else
		$test $i_sgtty = "$define" && xxx="sgtty.h"
		$test $i_termio = "$define" && xxx="termio.h"
		$test $i_termios = "$define" && xxx="termios.h"
echo "No <sys/ioctl.h> found, assuming ioctl args are defined in <$xxx>." >&4
	fi
fi
set i_sysioctl
eval $setvar


: see if this is a syslog.h system
set syslog.h i_syslog
eval $inhdr


: see if this is a sys/mode.h system
set sys/mode.h i_sysmode
eval $inhdr

: see if sys/resource.h has to be included
set sys/resource.h i_sysresrc
eval $inhdr

: see if sys/security.h is available
set sys/security.h i_syssecrt
eval $inhdr

: see if this is a sys/statvfs.h system
set sys/statvfs.h i_sysstatvfs
eval $inhdr

: see if this is a sys/uio.h system
set sys/uio.h i_sysuio
eval $inhdr

: see if this is a sys/un.h system
set sys/un.h i_sysun
eval $inhdr


: see if this is a sys/utsname.h system
set sys/utsname.h i_sysutsname
eval $inhdr

: see if this is a syswait system
set sys/wait.h i_syswait
eval $inhdr

: see if this is a ustat.h system
set ustat.h i_ustat
eval $inhdr

: see if this is an utime system
set utime.h i_utime
eval $inhdr

: see if this is a values.h system
set values.h i_values
eval $inhdr

: see if this is a vfork system
case "$d_vfork" in
"$define")
	set vfork.h i_vfork
	eval $inhdr
	;;
*)
	i_vfork="$undef"
	;;
esac

: see if gdbm.h is available
set gdbm.h t_gdbm
eval $inhdr
case "$t_gdbm" in
$define)
	: see if gdbm_open exists
	set gdbm_open d_gdbm_open
	eval $inlibc
	case "$d_gdbm_open" in
	$undef)
		t_gdbm="$undef"
		echo "We won't be including <gdbm.h>"
		;;
	esac
	;;
esac
val="$t_gdbm"
set i_gdbm
eval $setvar

echo " "
echo "Looking for extensions..." >&4
: If we are using the old config.sh, known_extensions may contain
: old or inaccurate or duplicate values.
known_extensions=''
nonxs_extensions=''
: We do not use find because it might not be available.
: We do not just use MANIFEST because the user may have dropped
: some additional extensions into the source tree and expect them
: to be built.

: Function to recursively find available extensions, ignoring DynaLoader
: NOTE: recursion limit of 10 to prevent runaway in case of symlink madness
find_extensions='
    for xxx in *; do
       case "$xxx" in
           DynaLoader|dynaload) ;;
           *)
           if $test -f $xxx/$xxx.xs; then
               known_extensions="$known_extensions $1$xxx";
           elif $test -f $xxx/Makefile.PL; then
               nonxs_extensions="$nonxs_extensions $1$xxx";
           else
               if $test -d $xxx -a $# -lt 10; then
                   set $1$xxx/ $*;
                   cd $xxx;
                   eval $find_extensions;
                   cd ..;
                   shift;
               fi;
           fi
           ;;
       esac;
    done'
tdir=`pwd`
cd $rsrc/ext
set X
shift
eval $find_extensions
set X $nonxs_extensions
shift
nonxs_extensions="$*"
set X $known_extensions
shift
known_extensions="$*"
cd $tdir

: Now see which are supported on this system.
avail_ext=''
for xxx in $known_extensions ; do
	case "$xxx" in
	DB_File|db_file)
		case "$i_db" in
		$define) avail_ext="$avail_ext $xxx" ;;
		esac
		;;
	GDBM_File|gdbm_fil)
		case "$i_gdbm" in 
		$define) avail_ext="$avail_ext $xxx" ;;
		esac
		;;
	NDBM_File|ndbm_fil)
		case "$i_ndbm" in
		$define)
		    case "$osname-$use64bitint" in
		    hpux-define)
			case "$libs" in
			*-lndbm*) avail_ext="$avail_ext $xxx" ;;
			esac
			;;
		    *) avail_ext="$avail_ext $xxx" ;;
		    esac
		    ;;
		esac
		;;
	ODBM_File|odbm_fil) 
		case "${i_dbm}${i_rpcsvcdbm}" in
		*"${define}"*)
		    case "$osname-$use64bitint" in
		    hpux-define)
			case "$libs" in
			*-ldbm*) avail_ext="$avail_ext $xxx" ;;
			esac
			;;
		    *) avail_ext="$avail_ext $xxx" ;;
		    esac
		    ;;
		esac
		;;
	POSIX|posix)
		case "$useposix" in
		true|define|y) avail_ext="$avail_ext $xxx" ;;
		esac
		;;
	Opcode|opcode)
		case "$useopcode" in
		true|define|y) avail_ext="$avail_ext $xxx" ;;
		esac
		;;
	Socket|socket)
		case "$d_socket" in 
		true|$define|y) avail_ext="$avail_ext $xxx" ;;
		esac
		;;
	Sys/Syslog|sys/syslog)
		: XXX syslog requires socket
		case "$d_socket" in 
		true|$define|y) avail_ext="$avail_ext $xxx" ;;
		esac
		;;
	Thread|thread)
		case "$usethreads" in 
		true|$define|y) avail_ext="$avail_ext $xxx" ;;
		esac
		;;
	IPC/SysV|ipc/sysv)
		: XXX Do we need a useipcsysv variable here
		case "${d_msg}${d_sem}${d_shm}" in 
		*"${define}"*) avail_ext="$avail_ext $xxx" ;;
		esac
		;;
	*)	avail_ext="$avail_ext $xxx"
		;;
	esac
done

set X $avail_ext
shift
avail_ext="$*"

: Now see which nonxs extensions are supported on this system.
: For now assume all are.
nonxs_ext=''
for xxx in $nonxs_extensions ; do
	case "$xxx" in
	*)	nonxs_ext="$nonxs_ext $xxx"
		;;
	esac
done

set X $nonxs_ext
shift
nonxs_ext="$*"

case $usedl in
$define)
	$cat <<EOM
A number of extensions are supplied with $package.  You may choose to
compile these extensions for dynamic loading (the default), compile
them into the $package executable (static loading), or not include
them at all.  Answer "none" to include no extensions.
Note that DynaLoader is always built and need not be mentioned here.

EOM
	case "$dynamic_ext" in
	'') dflt="$avail_ext" ;;
	*)	dflt="$dynamic_ext"
		# Perhaps we are reusing an old out-of-date config.sh.
		case "$hint" in
		previous)
			if test X"$dynamic_ext" != X"$avail_ext"; then
				$cat <<EOM
NOTICE:  Your previous config.sh list may be incorrect. 
The extensions now available to you are 
	${avail_ext}
but the default list from your previous config.sh is
	${dynamic_ext} 

EOM
			fi
			;;
		esac
		;;
	esac
	case "$dflt" in
	'')	dflt=none;;
	esac
	rp="What extensions do you wish to load dynamically?"
	. ./myread
	case "$ans" in
	none) dynamic_ext=' ' ;;
	*) dynamic_ext="$ans" ;;
	esac

	case "$static_ext" in
	'')
		: Exclude those already listed in dynamic linking
		dflt=''
		for xxx in $avail_ext; do
			case " $dynamic_ext " in
			*" $xxx "*) ;;
			*) dflt="$dflt $xxx" ;;
			esac
		done
		set X $dflt
		shift
		dflt="$*"
		;;
	*)  dflt="$static_ext" 
		;;
	esac

	case "$dflt" in
	'')	dflt=none;;
	esac
	rp="What extensions do you wish to load statically?"
	. ./myread
	case "$ans" in
	none) static_ext=' ' ;;
	*) static_ext="$ans" ;;
	esac
	;;
*)
	$cat <<EOM
A number of extensions are supplied with $package.  Answer "none" 
to include no extensions. 
Note that DynaLoader is always built and need not be mentioned here.

EOM
	case "$static_ext" in
	'') dflt="$avail_ext" ;;
	*)	dflt="$static_ext"
		# Perhaps we are reusing an old out-of-date config.sh.
		case "$hint" in
		previous)
			if test X"$static_ext" != X"$avail_ext"; then
				$cat <<EOM
NOTICE:  Your previous config.sh list may be incorrect. 
The extensions now available to you are 
	${avail_ext}
but the default list from your previous config.sh is
	${static_ext} 

EOM
			fi
			;;
		esac
		;;
	esac
	: Exclude those that are not xs extensions
	case "$dflt" in
	'')	dflt=none;;
	esac
	rp="What extensions do you wish to include?"
	. ./myread
	case "$ans" in
	none) static_ext=' ' ;;
	*) static_ext="$ans" ;;
	esac
	;;
esac

set X $dynamic_ext $static_ext $nonxs_ext
shift
extensions="$*"

: Remove libraries needed only for extensions
: The appropriate ext/Foo/Makefile.PL will add them back in, if necessary.
: The exception is SunOS 4.x, which needs them.
case "${osname}X${osvers}" in
sunos*X4*)
    perllibs="$libs"
    ;;
*) case "$usedl" in
    $define|true|[yY]*)
	    set X `echo " $libs " | sed -e 's@ -lndbm @ @' -e 's@ -lgdbm @ @' -e 's@ -ldbm @ @' -e 's@ -ldb @ @'` 
	    shift
	    perllibs="$*"
	    ;;
    *)	perllibs="$libs"
	    ;;
    esac
    ;;
esac

: Remove build directory name from cppstdin so it can be used from
: either the present location or the final installed location.
echo " "
: Get out of the UU directory to get correct path name.
cd ..
case "$cppstdin" in
`pwd`/cppstdin)
	echo "Stripping down cppstdin path name"
	cppstdin=cppstdin
	;;
esac
cd UU

: end of configuration questions
echo " "
echo "End of configuration questions."
echo " "

: back to where it started
if test -d ../UU; then
	cd ..
fi

: configuration may be patched via a 'config.over' file
if $test -f config.over; then
	echo " "
	dflt=y
	rp='I see a config.over file.  Do you wish to load it?'
	. UU/myread
	case "$ans" in
	n*) echo "OK, I'll ignore it.";;
	*)	. ./config.over
		echo "Configuration override changes have been loaded."
		;;
	esac
fi

: in case they want portability, strip down executable paths
case "$d_portable" in
"$define")
	echo " "
	echo "Stripping down executable paths..." >&4
	for file in $loclist $trylist; do
		eval temp=\$$file
		eval $file=`basename $temp`
	done
	;;
esac

: create config.sh file
echo " "
echo "Creating config.sh..." >&4
$spitshell <<EOT >config.sh
$startsh
#
# This file was produced by running the Configure script. It holds all the
# definitions figured out by Configure. Should you modify one of these values,
# do not forget to propagate your changes by running "Configure -der". You may
# instead choose to run each of the .SH files by yourself, or "Configure -S".
#

# Package name      : $package
# Source directory  : $src
# Configuration time: $cf_time
# Configured by     : $cf_by
# Target system     : $myuname

Author='$Author'
Date='$Date'
Header='$Header'
Id='$Id'
Locker='$Locker'
Log='$Log'
Mcc='$Mcc'
RCSfile='$RCSfile'
Revision='$Revision'
Source='$Source'
State='$State'
_a='$_a'
_exe='$_exe'
_o='$_o'
afs='$afs'
alignbytes='$alignbytes'
ansi2knr='$ansi2knr'
aphostname='$aphostname'
api_revision='$api_revision'
api_subversion='$api_subversion'
api_version='$api_version'
api_versionstring='$api_versionstring'
ar='$ar'
archlib='$archlib'
archlibexp='$archlibexp'
archname64='$archname64'
archname='$archname'
archobjs='$archobjs'
awk='$awk'
baserev='$baserev'
bash='$bash'
bin='$bin'
bincompat5005='$bincompat5005'
binexp='$binexp'
bison='$bison'
byacc='$byacc'
byteorder='$byteorder'
c='$c'
castflags='$castflags'
cat='$cat'
cc='$cc'
cccdlflags='$cccdlflags'
ccdlflags='$ccdlflags'
ccflags='$ccflags'
ccflags_uselargefiles='$ccflags_uselargefiles'
ccname='$ccname'
ccsymbols='$ccsymbols'
ccversion='$ccversion'
cf_by='$cf_by'
cf_email='$cf_email'
cf_time='$cf_time'
charsize='$charsize'
chgrp='$chgrp'
chmod='$chmod'
chown='$chown'
clocktype='$clocktype'
comm='$comm'
compress='$compress'
contains='$contains'
cp='$cp'
cpio='$cpio'
cpp='$cpp'
cpp_stuff='$cpp_stuff'
cppccsymbols='$cppccsymbols'
cppflags='$cppflags'
cpplast='$cpplast'
cppminus='$cppminus'
cpprun='$cpprun'
cppstdin='$cppstdin'
cppsymbols='$cppsymbols'
crosscompile='$crosscompile'
cryptlib='$cryptlib'
csh='$csh'
d_Gconvert='$d_Gconvert'
d_PRIEUldbl='$d_PRIEUldbl'
d_PRIFUldbl='$d_PRIFUldbl'
d_PRIGUldbl='$d_PRIGUldbl'
d_PRIXU64='$d_PRIXU64'
d_PRId64='$d_PRId64'
d_PRIeldbl='$d_PRIeldbl'
d_PRIfldbl='$d_PRIfldbl'
d_PRIgldbl='$d_PRIgldbl'
d_PRIi64='$d_PRIi64'
d_PRIo64='$d_PRIo64'
d_PRIu64='$d_PRIu64'
d_PRIx64='$d_PRIx64'
d_SCNfldbl='$d_SCNfldbl'
d_access='$d_access'
d_accessx='$d_accessx'
d_alarm='$d_alarm'
d_archlib='$d_archlib'
d_atolf='$d_atolf'
d_atoll='$d_atoll'
d_attribut='$d_attribut'
d_bcmp='$d_bcmp'
d_bcopy='$d_bcopy'
d_bincompat5005='$d_bincompat5005'
d_bsd='$d_bsd'
d_bsdgetpgrp='$d_bsdgetpgrp'
d_bsdsetpgrp='$d_bsdsetpgrp'
d_bzero='$d_bzero'
d_casti32='$d_casti32'
d_castneg='$d_castneg'
d_charvspr='$d_charvspr'
d_chown='$d_chown'
d_chroot='$d_chroot'
d_chsize='$d_chsize'
d_closedir='$d_closedir'
d_const='$d_const'
d_crypt='$d_crypt'
d_csh='$d_csh'
d_cuserid='$d_cuserid'
d_dbl_dig='$d_dbl_dig'
d_difftime='$d_difftime'
d_dirnamlen='$d_dirnamlen'
d_dlerror='$d_dlerror'
d_dlopen='$d_dlopen'
d_dlsymun='$d_dlsymun'
d_dosuid='$d_dosuid'
d_drand48proto='$d_drand48proto'
d_dup2='$d_dup2'
d_eaccess='$d_eaccess'
d_endgrent='$d_endgrent'
d_endhent='$d_endhent'
d_endnent='$d_endnent'
d_endpent='$d_endpent'
d_endpwent='$d_endpwent'
d_endsent='$d_endsent'
d_eofnblk='$d_eofnblk'
d_eunice='$d_eunice'
d_fchmod='$d_fchmod'
d_fchown='$d_fchown'
d_fcntl='$d_fcntl'
d_fcntl_can_lock='$d_fcntl_can_lock'
d_fd_macros='$d_fd_macros'
d_fd_set='$d_fd_set'
d_fds_bits='$d_fds_bits'
d_fgetpos='$d_fgetpos'
d_flexfnam='$d_flexfnam'
d_flock='$d_flock'
d_fork='$d_fork'
d_fpathconf='$d_fpathconf'
d_fpos64_t='$d_fpos64_t'
d_frexpl='$d_frexpl'
d_fs_data_s='$d_fs_data_s'
d_fseeko='$d_fseeko'
d_fsetpos='$d_fsetpos'
d_fstatfs='$d_fstatfs'
d_fstatvfs='$d_fstatvfs'
d_fsync='$d_fsync'
d_ftello='$d_ftello'
d_ftime='$d_ftime'
d_getcwd='$d_getcwd'
d_getespwnam='$d_getespwnam'
d_getfsstat='$d_getfsstat'
d_getgrent='$d_getgrent'
d_getgrps='$d_getgrps'
d_gethbyaddr='$d_gethbyaddr'
d_gethbyname='$d_gethbyname'
d_gethent='$d_gethent'
d_gethname='$d_gethname'
d_gethostprotos='$d_gethostprotos'
d_getlogin='$d_getlogin'
d_getmnt='$d_getmnt'
d_getmntent='$d_getmntent'
d_getnbyaddr='$d_getnbyaddr'
d_getnbyname='$d_getnbyname'
d_getnent='$d_getnent'
d_getnetprotos='$d_getnetprotos'
d_getpagsz='$d_getpagsz'
d_getpbyname='$d_getpbyname'
d_getpbynumber='$d_getpbynumber'
d_getpent='$d_getpent'
d_getpgid='$d_getpgid'
d_getpgrp2='$d_getpgrp2'
d_getpgrp='$d_getpgrp'
d_getppid='$d_getppid'
d_getprior='$d_getprior'
d_getprotoprotos='$d_getprotoprotos'
d_getprpwnam='$d_getprpwnam'
d_getpwent='$d_getpwent'
d_getsbyname='$d_getsbyname'
d_getsbyport='$d_getsbyport'
d_getsent='$d_getsent'
d_getservprotos='$d_getservprotos'
d_getspnam='$d_getspnam'
d_gettimeod='$d_gettimeod'
d_gnulibc='$d_gnulibc'
d_grpasswd='$d_grpasswd'
d_hasmntopt='$d_hasmntopt'
d_htonl='$d_htonl'
d_iconv='$d_iconv'
d_index='$d_index'
d_inetaton='$d_inetaton'
d_int64_t='$d_int64_t'
d_isascii='$d_isascii'
d_isnan='$d_isnan'
d_isnanl='$d_isnanl'
d_killpg='$d_killpg'
d_lchown='$d_lchown'
d_ldbl_dig='$d_ldbl_dig'
d_link='$d_link'
d_locconv='$d_locconv'
d_lockf='$d_lockf'
d_longdbl='$d_longdbl'
d_longlong='$d_longlong'
d_lseekproto='$d_lseekproto'
d_lstat='$d_lstat'
d_madvise='$d_madvise'
d_mblen='$d_mblen'
d_mbstowcs='$d_mbstowcs'
d_mbtowc='$d_mbtowc'
d_memchr='$d_memchr'
d_memcmp='$d_memcmp'
d_memcpy='$d_memcpy'
d_memmove='$d_memmove'
d_memset='$d_memset'
d_mkdir='$d_mkdir'
d_mkdtemp='$d_mkdtemp'
d_mkfifo='$d_mkfifo'
d_mkstemp='$d_mkstemp'
d_mkstemps='$d_mkstemps'
d_mktime='$d_mktime'
d_mmap='$d_mmap'
d_modfl='$d_modfl'
d_mprotect='$d_mprotect'
d_msg='$d_msg'
d_msg_ctrunc='$d_msg_ctrunc'
d_msg_dontroute='$d_msg_dontroute'
d_msg_oob='$d_msg_oob'
d_msg_peek='$d_msg_peek'
d_msg_proxy='$d_msg_proxy'
d_msgctl='$d_msgctl'
d_msgget='$d_msgget'
d_msgrcv='$d_msgrcv'
d_msgsnd='$d_msgsnd'
d_msync='$d_msync'
d_munmap='$d_munmap'
d_mymalloc='$d_mymalloc'
d_nice='$d_nice'
d_nv_preserves_uv='$d_nv_preserves_uv'
d_nv_preserves_uv_bits='$d_nv_preserves_uv_bits'
d_off64_t='$d_off64_t'
d_old_pthread_create_joinable='$d_old_pthread_create_joinable'
d_oldpthreads='$d_oldpthreads'
d_oldsock='$d_oldsock'
d_open3='$d_open3'
d_pathconf='$d_pathconf'
d_pause='$d_pause'
d_perl_otherlibdirs='$d_perl_otherlibdirs'
d_phostname='$d_phostname'
d_pipe='$d_pipe'
d_poll='$d_poll'
d_portable='$d_portable'
d_pthread_yield='$d_pthread_yield'
d_pwage='$d_pwage'
d_pwchange='$d_pwchange'
d_pwclass='$d_pwclass'
d_pwcomment='$d_pwcomment'
d_pwexpire='$d_pwexpire'
d_pwgecos='$d_pwgecos'
d_pwpasswd='$d_pwpasswd'
d_pwquota='$d_pwquota'
d_qgcvt='$d_qgcvt'
d_quad='$d_quad'
d_readdir='$d_readdir'
d_readlink='$d_readlink'
d_rename='$d_rename'
d_rewinddir='$d_rewinddir'
d_rmdir='$d_rmdir'
d_safebcpy='$d_safebcpy'
d_safemcpy='$d_safemcpy'
d_sanemcmp='$d_sanemcmp'
d_sched_yield='$d_sched_yield'
d_scm_rights='$d_scm_rights'
d_seekdir='$d_seekdir'
d_select='$d_select'
d_sem='$d_sem'
d_semctl='$d_semctl'
d_semctl_semid_ds='$d_semctl_semid_ds'
d_semctl_semun='$d_semctl_semun'
d_semget='$d_semget'
d_semop='$d_semop'
d_setegid='$d_setegid'
d_seteuid='$d_seteuid'
d_setgrent='$d_setgrent'
d_setgrps='$d_setgrps'
d_sethent='$d_sethent'
d_setlinebuf='$d_setlinebuf'
d_setlocale='$d_setlocale'
d_setnent='$d_setnent'
d_setpent='$d_setpent'
d_setpgid='$d_setpgid'
d_setpgrp2='$d_setpgrp2'
d_setpgrp='$d_setpgrp'
d_setprior='$d_setprior'
d_setproctitle='$d_setproctitle'
d_setpwent='$d_setpwent'
d_setregid='$d_setregid'
d_setresgid='$d_setresgid'
d_setresuid='$d_setresuid'
d_setreuid='$d_setreuid'
d_setrgid='$d_setrgid'
d_setruid='$d_setruid'
d_setsent='$d_setsent'
d_setsid='$d_setsid'
d_setvbuf='$d_setvbuf'
d_sfio='$d_sfio'
d_shm='$d_shm'
d_shmat='$d_shmat'
d_shmatprototype='$d_shmatprototype'
d_shmctl='$d_shmctl'
d_shmdt='$d_shmdt'
d_shmget='$d_shmget'
d_sigaction='$d_sigaction'
d_sigsetjmp='$d_sigsetjmp'
d_socket='$d_socket'
d_socklen_t='$d_socklen_t'
d_sockpair='$d_sockpair'
d_socks5_init='$d_socks5_init'
d_sqrtl='$d_sqrtl'
d_statblks='$d_statblks'
d_statfs_f_flags='$d_statfs_f_flags'
d_statfs_s='$d_statfs_s'
d_statvfs='$d_statvfs'
d_stdio_cnt_lval='$d_stdio_cnt_lval'
d_stdio_ptr_lval='$d_stdio_ptr_lval'
d_stdio_ptr_lval_nochange_cnt='$d_stdio_ptr_lval_nochange_cnt'
d_stdio_ptr_lval_sets_cnt='$d_stdio_ptr_lval_sets_cnt'
d_stdio_stream_array='$d_stdio_stream_array'
d_stdiobase='$d_stdiobase'
d_stdstdio='$d_stdstdio'
d_strchr='$d_strchr'
d_strcoll='$d_strcoll'
d_strctcpy='$d_strctcpy'
d_strerrm='$d_strerrm'
d_strerror='$d_strerror'
d_strtod='$d_strtod'
d_strtol='$d_strtol'
d_strtold='$d_strtold'
d_strtoll='$d_strtoll'
d_strtoul='$d_strtoul'
d_strtoull='$d_strtoull'
d_strtouq='$d_strtouq'
d_strxfrm='$d_strxfrm'
d_suidsafe='$d_suidsafe'
d_symlink='$d_symlink'
d_syscall='$d_syscall'
d_sysconf='$d_sysconf'
d_sysernlst='$d_sysernlst'
d_syserrlst='$d_syserrlst'
d_system='$d_system'
d_tcgetpgrp='$d_tcgetpgrp'
d_tcsetpgrp='$d_tcsetpgrp'
d_telldir='$d_telldir'
d_telldirproto='$d_telldirproto'
d_time='$d_time'
d_times='$d_times'
d_truncate='$d_truncate'
d_tzname='$d_tzname'
d_umask='$d_umask'
d_uname='$d_uname'
d_union_semun='$d_union_semun'
d_ustat='$d_ustat'
d_vendorarch='$d_vendorarch'
d_vendorbin='$d_vendorbin'
d_vendorlib='$d_vendorlib'
d_vfork='$d_vfork'
d_void_closedir='$d_void_closedir'
d_voidsig='$d_voidsig'
d_voidtty='$d_voidtty'
d_volatile='$d_volatile'
d_vprintf='$d_vprintf'
d_wait4='$d_wait4'
d_waitpid='$d_waitpid'
d_wcstombs='$d_wcstombs'
d_wctomb='$d_wctomb'
d_xenix='$d_xenix'
date='$date'
db_hashtype='$db_hashtype'
db_prefixtype='$db_prefixtype'
defvoidused='$defvoidused'
direntrytype='$direntrytype'
dlext='$dlext'
dlsrc='$dlsrc'
doublesize='$doublesize'
drand01='$drand01'
dynamic_ext='$dynamic_ext'
eagain='$eagain'
ebcdic='$ebcdic'
echo='$echo'
egrep='$egrep'
emacs='$emacs'
eunicefix='$eunicefix'
exe_ext='$exe_ext'
expr='$expr'
extensions='$extensions'
fflushNULL='$fflushNULL'
fflushall='$fflushall'
find='$find'
firstmakefile='$firstmakefile'
flex='$flex'
fpossize='$fpossize'
fpostype='$fpostype'
freetype='$freetype'
full_ar='$full_ar'
full_csh='$full_csh'
full_sed='$full_sed'
gccosandvers='$gccosandvers'
gccversion='$gccversion'
gidformat='$gidformat'
gidsign='$gidsign'
gidsize='$gidsize'
gidtype='$gidtype'
glibpth='$glibpth'
grep='$grep'
groupcat='$groupcat'
groupstype='$groupstype'
gzip='$gzip'
h_fcntl='$h_fcntl'
h_sysfile='$h_sysfile'
hint='$hint'
hostcat='$hostcat'
i16size='$i16size'
i16type='$i16type'
i32size='$i32size'
i32type='$i32type'
i64size='$i64size'
i64type='$i64type'
i8size='$i8size'
i8type='$i8type'
i_arpainet='$i_arpainet'
i_bsdioctl='$i_bsdioctl'
i_db='$i_db'
i_dbm='$i_dbm'
i_dirent='$i_dirent'
i_dld='$i_dld'
i_dlfcn='$i_dlfcn'
i_fcntl='$i_fcntl'
i_float='$i_float'
i_gdbm='$i_gdbm'
i_grp='$i_grp'
i_iconv='$i_iconv'
i_ieeefp='$i_ieeefp'
i_inttypes='$i_inttypes'
i_libutil='$i_libutil'
i_limits='$i_limits'
i_locale='$i_locale'
i_machcthr='$i_machcthr'
i_malloc='$i_malloc'
i_math='$i_math'
i_memory='$i_memory'
i_mntent='$i_mntent'
i_ndbm='$i_ndbm'
i_netdb='$i_netdb'
i_neterrno='$i_neterrno'
i_netinettcp='$i_netinettcp'
i_niin='$i_niin'
i_poll='$i_poll'
i_prot='$i_prot'
i_pthread='$i_pthread'
i_pwd='$i_pwd'
i_rpcsvcdbm='$i_rpcsvcdbm'
i_sfio='$i_sfio'
i_sgtty='$i_sgtty'
i_shadow='$i_shadow'
i_socks='$i_socks'
i_stdarg='$i_stdarg'
i_stddef='$i_stddef'
i_stdlib='$i_stdlib'
i_string='$i_string'
i_sunmath='$i_sunmath'
i_sysaccess='$i_sysaccess'
i_sysdir='$i_sysdir'
i_sysfile='$i_sysfile'
i_sysfilio='$i_sysfilio'
i_sysin='$i_sysin'
i_sysioctl='$i_sysioctl'
i_syslog='$i_syslog'
i_sysmman='$i_sysmman'
i_sysmode='$i_sysmode'
i_sysmount='$i_sysmount'
i_sysndir='$i_sysndir'
i_sysparam='$i_sysparam'
i_sysresrc='$i_sysresrc'
i_syssecrt='$i_syssecrt'
i_sysselct='$i_sysselct'
i_syssockio='$i_syssockio'
i_sysstat='$i_sysstat'
i_sysstatfs='$i_sysstatfs'
i_sysstatvfs='$i_sysstatvfs'
i_systime='$i_systime'
i_systimek='$i_systimek'
i_systimes='$i_systimes'
i_systypes='$i_systypes'
i_sysuio='$i_sysuio'
i_sysun='$i_sysun'
i_sysutsname='$i_sysutsname'
i_sysvfs='$i_sysvfs'
i_syswait='$i_syswait'
i_termio='$i_termio'
i_termios='$i_termios'
i_time='$i_time'
i_unistd='$i_unistd'
i_ustat='$i_ustat'
i_utime='$i_utime'
i_values='$i_values'
i_varargs='$i_varargs'
i_varhdr='$i_varhdr'
i_vfork='$i_vfork'
ignore_versioned_solibs='$ignore_versioned_solibs'
inc_version_list='$inc_version_list'
inc_version_list_init='$inc_version_list_init'
incpath='$incpath'
inews='$inews'
installarchlib='$installarchlib'
installbin='$installbin'
installman1dir='$installman1dir'
installman3dir='$installman3dir'
installprefix='$installprefix'
installprefixexp='$installprefixexp'
installprivlib='$installprivlib'
installscript='$installscript'
installsitearch='$installsitearch'
installsitebin='$installsitebin'
installsitelib='$installsitelib'
installstyle='$installstyle'
installusrbinperl='$installusrbinperl'
installvendorarch='$installvendorarch'
installvendorbin='$installvendorbin'
installvendorlib='$installvendorlib'
intsize='$intsize'
ivdformat='$ivdformat'
ivsize='$ivsize'
ivtype='$ivtype'
known_extensions='$known_extensions'
ksh='$ksh'
ld='$ld'
lddlflags='$lddlflags'
ldflags='$ldflags'
ldflags_uselargefiles='$ldflags_uselargefiles'
ldlibpthname='$ldlibpthname'
less='$less'
lib_ext='$lib_ext'
libc='$libc'
libperl='$libperl'
libpth='$libpth'
libs='$libs'
libsdirs='$libsdirs'
libsfiles='$libsfiles'
libsfound='$libsfound'
libspath='$libspath'
libswanted='$libswanted'
libswanted_uselargefiles='$libswanted_uselargefiles'
line='$line'
lint='$lint'
lkflags='$lkflags'
ln='$ln'
lns='$lns'
locincpth='$locincpth'
loclibpth='$loclibpth'
longdblsize='$longdblsize'
longlongsize='$longlongsize'
longsize='$longsize'
lp='$lp'
lpr='$lpr'
ls='$ls'
lseeksize='$lseeksize'
lseektype='$lseektype'
mail='$mail'
mailx='$mailx'
make='$make'
make_set_make='$make_set_make'
mallocobj='$mallocobj'
mallocsrc='$mallocsrc'
malloctype='$malloctype'
man1dir='$man1dir'
man1direxp='$man1direxp'
man1ext='$man1ext'
man3dir='$man3dir'
man3direxp='$man3direxp'
man3ext='$man3ext'
mips_type='$mips_type'
mkdir='$mkdir'
mmaptype='$mmaptype'
modetype='$modetype'
more='$more'
multiarch='$multiarch'
mv='$mv'
myarchname='$myarchname'
mydomain='$mydomain'
myhostname='$myhostname'
myuname='$myuname'
n='$n'
netdb_hlen_type='$netdb_hlen_type'
netdb_host_type='$netdb_host_type'
netdb_name_type='$netdb_name_type'
netdb_net_type='$netdb_net_type'
nm='$nm'
nm_opt='$nm_opt'
nm_so_opt='$nm_so_opt'
nonxs_ext='$nonxs_ext'
nroff='$nroff'
nvEUformat='$nvEUformat'
nvFUformat='$nvFUformat'
nvGUformat='$nvGUformat'
nveformat='$nveformat'
nvfformat='$nvfformat'
nvgformat='$nvgformat'
nvsize='$nvsize'
nvtype='$nvtype'
o_nonblock='$o_nonblock'
obj_ext='$obj_ext'
old_pthread_create_joinable='$old_pthread_create_joinable'
optimize='$optimize'
orderlib='$orderlib'
osname='$osname'
osvers='$osvers'
otherlibdirs='$otherlibdirs'
package='$package'
pager='$pager'
passcat='$passcat'
patchlevel='$patchlevel'
path_sep='$path_sep'
perl5='$perl5'
perl='$perl'
perladmin='$perladmin'
perllibs='$perllibs'
perlpath='$perlpath'
pg='$pg'
phostname='$phostname'
pidtype='$pidtype'
plibpth='$plibpth'
pm_apiversion='$pm_apiversion'
pmake='$pmake'
pr='$pr'
prefix='$prefix'
prefixexp='$prefixexp'
privlib='$privlib'
privlibexp='$privlibexp'
prototype='$prototype'
ptrsize='$ptrsize'
quadkind='$quadkind'
quadtype='$quadtype'
randbits='$randbits'
randfunc='$randfunc'
randseedtype='$randseedtype'
ranlib='$ranlib'
rd_nodata='$rd_nodata'
revision='$revision'
rm='$rm'
rmail='$rmail'
runnm='$runnm'
sPRIEUldbl='$sPRIEUldbl'
sPRIFUldbl='$sPRIFUldbl'
sPRIGUldbl='$sPRIGUldbl'
sPRIXU64='$sPRIXU64'
sPRId64='$sPRId64'
sPRIeldbl='$sPRIeldbl'
sPRIfldbl='$sPRIfldbl'
sPRIgldbl='$sPRIgldbl'
sPRIi64='$sPRIi64'
sPRIo64='$sPRIo64'
sPRIu64='$sPRIu64'
sPRIx64='$sPRIx64'
sSCNfldbl='$sSCNfldbl'
sched_yield='$sched_yield'
scriptdir='$scriptdir'
scriptdirexp='$scriptdirexp'
sed='$sed'
seedfunc='$seedfunc'
selectminbits='$selectminbits'
selecttype='$selecttype'
sendmail='$sendmail'
sh='$sh'
shar='$shar'
sharpbang='$sharpbang'
shmattype='$shmattype'
shortsize='$shortsize'
shrpenv='$shrpenv'
shsharp='$shsharp'
sig_count='$sig_count'
sig_name='$sig_name'
sig_name_init='$sig_name_init'
sig_num='$sig_num'
sig_num_init='$sig_num_init'
signal_t='$signal_t'
sitearch='$sitearch'
sitearchexp='$sitearchexp'
sitebin='$sitebin'
sitebinexp='$sitebinexp'
sitelib='$sitelib'
sitelib_stem='$sitelib_stem'
sitelibexp='$sitelibexp'
siteprefix='$siteprefix'
siteprefixexp='$siteprefixexp'
sizesize='$sizesize'
sizetype='$sizetype'
sleep='$sleep'
smail='$smail'
so='$so'
sockethdr='$sockethdr'
socketlib='$socketlib'
socksizetype='$socksizetype'
sort='$sort'
spackage='$spackage'
spitshell='$spitshell'
src='$src'
ssizetype='$ssizetype'
startperl='$startperl'
startsh='$startsh'
static_ext='$static_ext'
stdchar='$stdchar'
stdio_base='$stdio_base'
stdio_bufsiz='$stdio_bufsiz'
stdio_cnt='$stdio_cnt'
stdio_filbuf='$stdio_filbuf'
stdio_ptr='$stdio_ptr'
stdio_stream_array='$stdio_stream_array'
strings='$strings'
submit='$submit'
subversion='$subversion'
sysman='$sysman'
tail='$tail'
tar='$tar'
tbl='$tbl'
tee='$tee'
test='$test'
timeincl='$timeincl'
timetype='$timetype'
touch='$touch'
tr='$tr'
trnl='$trnl'
troff='$troff'
u16size='$u16size'
u16type='$u16type'
u32size='$u32size'
u32type='$u32type'
u64size='$u64size'
u64type='$u64type'
u8size='$u8size'
u8type='$u8type'
uidformat='$uidformat'
uidsign='$uidsign'
uidsize='$uidsize'
uidtype='$uidtype'
uname='$uname'
uniq='$uniq'
uquadtype='$uquadtype'
use5005threads='$use5005threads'
use64bitall='$use64bitall'
use64bitint='$use64bitint'
usedl='$usedl'
useithreads='$useithreads'
uselargefiles='$uselargefiles'
uselongdouble='$uselongdouble'
usemorebits='$usemorebits'
usemultiplicity='$usemultiplicity'
usemymalloc='$usemymalloc'
usenm='$usenm'
useopcode='$useopcode'
useperlio='$useperlio'
useposix='$useposix'
usesfio='$usesfio'
useshrplib='$useshrplib'
usesocks='$usesocks'
usethreads='$usethreads'
usevendorprefix='$usevendorprefix'
usevfork='$usevfork'
usrinc='$usrinc'
uuname='$uuname'
uvXUformat='$uvXUformat'
uvoformat='$uvoformat'
uvsize='$uvsize'
uvtype='$uvtype'
uvuformat='$uvuformat'
uvxformat='$uvxformat'
vendorarch='$vendorarch'
vendorarchexp='$vendorarchexp'
vendorbin='$vendorbin'
vendorbinexp='$vendorbinexp'
vendorlib='$vendorlib'
vendorlib_stem='$vendorlib_stem'
vendorlibexp='$vendorlibexp'
vendorprefix='$vendorprefix'
vendorprefixexp='$vendorprefixexp'
version='$version'
versiononly='$versiononly'
vi='$vi'
voidflags='$voidflags'
xlibpth='$xlibpth'
xs_apiversion='$xs_apiversion'
zcat='$zcat'
zip='$zip'
EOT

: Add in command line options if available
$test -f UU/cmdline.opt && $cat UU/cmdline.opt >> config.sh

: add special variables
$test -f $src/patchlevel.h && \
awk '/^#define[ 	]+PERL_/ {printf "%s=%s\n",$2,$3}' $src/patchlevel.h >>config.sh
echo "CONFIGDOTSH=true" >>config.sh

: propagate old symbols
if $test -f UU/config.sh; then
	<UU/config.sh $sort | $uniq >UU/oldconfig.sh
	sed -n 's/^\([a-zA-Z_0-9]*\)=.*/\1/p' config.sh config.sh UU/oldconfig.sh |\
	$sort | $uniq -u >UU/oldsyms
	set X `cat UU/oldsyms`
	shift
	case $# in
	0) ;;
	*)
		cat <<EOM
Hmm...You had some extra variables I don't know about...I'll try to keep 'em...
EOM
		echo "# Variables propagated from previous config.sh file." >>config.sh
		for sym in `cat UU/oldsyms`; do
			echo "    Propagating $hint variable "'$'"$sym..."
			eval 'tmp="$'"${sym}"'"'
			echo "$tmp" | \
				sed -e "s/'/'\"'\"'/g" -e "s/^/$sym='/" -e "s/$/'/" >>config.sh
		done
		;;
	esac
fi

: Finish up by extracting the .SH files
case "$alldone" in
exit)
	$rm -rf UU
	echo "Done."
	exit 0
	;;
cont)
	;;
'')
	dflt=''
	nostick=true
	$cat <<EOM

If you'd like to make any changes to the config.sh file before I begin
to configure things, do it as a shell escape now (e.g. !vi config.sh).

EOM
	rp="Press return or use a shell escape to edit config.sh:"
	. UU/myread
	nostick=''
	case "$ans" in
	'') ;;
	*) : in case they cannot read
		sh 1>&4 -c "$ans";;
	esac
	;;
esac

: if this fails, just run all the .SH files by hand
. ./config.sh

echo " "
exec 1>&4
. ./UU/extract

if $contains '^depend:' [Mm]akefile >/dev/null 2>&1; then
	dflt=y
	case "$silent" in
	true) ;;
	*)
		$cat <<EOM

Now you need to generate make dependencies by running "$make depend".
You might prefer to run it in background: "$make depend > makedepend.out &"
It can take a while, so you might not want to run it right now.

EOM
		;;
	esac
	rp="Run $make depend now?"
	. UU/myread
	case "$ans" in
	y*)
		$make depend && echo "Now you must run '$make'."
		;;
	*)
		echo "You must run '$make depend' then '$make'."
		;;
	esac
elif test -f [Mm]akefile; then
	echo " "
	echo "Now you must run a $make."
else
	echo "Done."
fi

if $test -f Policy.sh; then
    $cat <<EOM

If you compile $package on a different machine or from a different object
directory, copy the Policy.sh file from this object directory to the
new one before you run Configure -- this will help you with most of
the policy defaults.

EOM
fi
if $test -f config.msg; then
    echo "Hmm.  I also noted the following information while running:"
    echo " "
    $cat config.msg >&4
    $rm -f config.msg
fi
$rm -f kit*isdone ark*isdone
$rm -rf UU

: End of Configure