Robustness support for #8218 (symlink forest) since the GNU

[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 Thu Dec 21 17:16:36 EET 2000 [metaconfig 3.0 PL70]
# (with additional metaconfig patches by perlbug@perl.org)

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

(exit $?0) || cat c2$$
(exit $?0) || exec sh $0 $argv:q
rm -f c1$$ 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__fwalk=''
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_sbrkproto=''
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_strtoq=''
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=''
need_va_copy=''
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=''
testsyml=''
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

: determine whether symbolic links are supported
echo " "
case "$lns" in
*"ln -s")
	echo "Checking how to test for symbolic links..." >&4
	$lns blurfl sym
	if $test "X$testsyml" = X; then
		if $test -h sym 2>/dev/null; then
			testsyml=-h
		fi
	fi
	if $test "X$testsyml" = X; then
		if $test -L sym 2>/dev/null; then
			testsyml=-L
		fi
	fi
	if $test "X$testsyml" != X; then
		echo "You can test for symbolic links with $testsyml." >&4
	else
		echo "I do not know how you can test for symbolic links." >&4
	fi
	$rm -f blurfl sym
	;;
*)	echo "No symbolic links, so not testing for their testing..." >&4
	;;
esac
echo " "


case "$mksymlinks" in
$define|true|[yY]*)
	case "$src" in
	''|'.')	echo "Cannot create symlinks in the original directory." >&4
		exit 1
		;;
	*)	case "$lns:$testsyml" in
		*"ln -s:-"?)
			echo "Creating the symbolic links..." >&4
			echo "(First creating the subdirectories...)" >&4
			cd ..
			awk '{print $1}' $src/MANIFEST | grep / | sed 's:/[^/]*$::' | sort -u | while true; do
				read directory
				test -z "$directory" && break
				mkdir -p $directory
			done
			# Sanity check 1.
			if test ! -d t/base; then
				echo "Failed to create the subdirectories.  Aborting." >&4
				exit 1
			fi
			echo "(Then creating the symlinks...)" >&4
			awk '{print $1}' $src/MANIFEST | while true; do
				read filename
				test -z "$filename" && break
				if test -f $filename; then
					if test $testsyml $filename; then
						rm -f $filename
					fi
				fi
				if test -f $filename; then
					echo "$filename already exists, not symlinking."
				else
					ln -s $src/$filename $filename
				fi
			done
			# Sanity check 2.
			if test ! -f t/base/commonsense.t; then
				echo "Failed to create the symlinks.  Aborting." >&4
				exit 1
			fi
			cd UU
			;;
		*)	echo "(I cannot figure out how to do symbolic links, ignoring mksymlinks)." >&4
			;;
		esac
		;;
	esac
	;;
esac

: 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 you use SOCKS you also need
to use the PerlIO abstraction layer, this will be implicitly selected.

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

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

: 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 "*)