X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/4492b098a8517fe1f73eca32139095ceb008ac02..8af3c3489f0c9ca8d37ebae27991ac4f34dfdb2f:/Configure

diff --git a/Configure b/Configure
index cabdc46..e3dc44f 100755
--- a/Configure
+++ b/Configure
@@ -20,7 +20,7 @@
 
 # $Id: Head.U,v 3.0.1.9 1997/02/28 15:02:09 ram Exp $
 #
-# Generated on Tue Mar 18 09:54:18 EET 2003 [metaconfig 3.0 PL70]
+# Generated on Sun Apr 24 14:17:04 CEST 2005 [metaconfig 3.0 PL70]
 # (with additional metaconfig patches by perlbug@perl.org)
 
 cat >c1$$ <<EOF
@@ -71,11 +71,12 @@ 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 -d c:/. || ( uname -a | grep -i 'os\(/\|\)2' ) 2>&1 >/dev/null ; then
     if test -n "$OS2_SHELL"; then
 		p_=\;
 		PATH=`cmd /c "echo %PATH%" | tr '\\\\' / `
 		OS2_SHELL=`cmd /c "echo %OS2_SHELL%" | tr '\\\\' / | tr '[A-Z]' '[a-z]'`
+		is_os2=yes
 	elif test -n "$DJGPP"; then
 		case "X${MACHTYPE:-nonesuchmach}" in
 		*cygwin) ;;
@@ -90,7 +91,7 @@ paths="$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="$paths /bsd4.3/usr/bin /usr/bsd /bsd43/bin /opt/ansic/bin /usr/ccs/bin"
 paths="$paths /etc /usr/lib /usr/ucblib /lib /usr/ccs/lib"
 paths="$paths /sbin /usr/sbin /usr/libexec"
 paths="$paths /system/gnu_library/bin"
@@ -187,6 +188,7 @@ run=''
 targetarch=''
 to=''
 usecrosscompile=''
+mistrustnm=''
 perllibs=''
 dynamic_ext=''
 extensions=''
@@ -333,6 +335,7 @@ cppstdin=''
 d__fwalk=''
 d_access=''
 d_accessx=''
+d_aintl=''
 d_alarm=''
 asctime_r_proto=''
 d_asctime_r=''
@@ -351,6 +354,7 @@ d_closedir=''
 d_void_closedir=''
 d_cmsghdr_s=''
 d_const=''
+d_copysignl=''
 cryptlib=''
 d_crypt=''
 crypt_r_proto=''
@@ -394,6 +398,7 @@ endpwent_r_proto=''
 d_endsent=''
 d_endservent_r=''
 endservent_r_proto=''
+d_faststdio=''
 d_fchdir=''
 d_fchmod=''
 d_fchown=''
@@ -509,6 +514,7 @@ d_gnulibc=''
 gnulibc_version=''
 d_hasmntopt=''
 d_htonl=''
+d_ilogbl=''
 d_inetaton=''
 d_int64_t=''
 d_isascii=''
@@ -519,6 +525,7 @@ d_isnanl=''
 d_killpg=''
 d_lchown=''
 d_ldbl_dig=''
+d_libm_lib_version=''
 d_link=''
 d_localtime_r=''
 localtime_r_proto=''
@@ -559,7 +566,6 @@ d_msgrcv=''
 d_msgsnd=''
 d_msync=''
 d_munmap=''
-d_nanosleep=''
 d_nice=''
 d_nl_langinfo=''
 d_off64_t=''
@@ -575,6 +581,7 @@ procselfexe=''
 d_old_pthread_create_joinable=''
 old_pthread_create_joinable=''
 d_pthread_atfork=''
+d_pthread_attr_setscope=''
 d_pthread_yield=''
 d_sched_yield=''
 sched_yield=''
@@ -598,6 +605,7 @@ d_safebcpy=''
 d_safemcpy=''
 d_sanemcmp=''
 d_sbrkproto=''
+d_scalbnl=''
 d_select=''
 d_sem=''
 d_semctl=''
@@ -656,6 +664,7 @@ d_shmget=''
 d_sigaction=''
 d_sigprocmask=''
 d_sigsetjmp=''
+usesitecustomize=''
 d_sockatmark=''
 d_sockatmarkproto=''
 d_msg_ctrunc=''
@@ -705,6 +714,8 @@ d_syserrlst=''
 d_strerror_r=''
 strerror_r_proto=''
 d_strftime=''
+d_strlcat=''
+d_strlcpy=''
 d_strtod=''
 d_strtol=''
 d_strtold=''
@@ -935,6 +946,7 @@ freetype=''
 mallocobj=''
 mallocsrc=''
 malloctype=''
+usemallocwrap=''
 usemymalloc=''
 installman1dir=''
 man1dir=''
@@ -1065,22 +1077,22 @@ sitearchexp=''
 installsitebin=''
 sitebin=''
 sitebinexp=''
-installsitehtml1=''
-sitehtml1=''
-sitehtml1exp=''
-installsitehtml3=''
-sitehtml3=''
-sitehtml3exp=''
+installsitehtml1dir=''
+sitehtml1dir=''
+sitehtml1direxp=''
+installsitehtml3dir=''
+sitehtml3dir=''
+sitehtml3direxp=''
 installsitelib=''
 sitelib=''
 sitelib_stem=''
 sitelibexp=''
-installsiteman1=''
-siteman1=''
-siteman1exp=''
-installsiteman3=''
-siteman3=''
-siteman3exp=''
+installsiteman1dir=''
+siteman1dir=''
+siteman1direxp=''
+installsiteman3dir=''
+siteman3dir=''
+siteman3direxp=''
 siteprefix=''
 siteprefixexp=''
 installsitescript=''
@@ -1109,6 +1121,7 @@ uidtype=''
 archname64=''
 use64bitall=''
 use64bitint=''
+usefaststdio=''
 ccflags_uselargefiles=''
 ldflags_uselargefiles=''
 libswanted_uselargefiles=''
@@ -1121,6 +1134,7 @@ nm_so_opt=''
 runnm=''
 usenm=''
 useperlio=''
+userelocatableinc=''
 usesocks=''
 d_oldpthreads=''
 use5005threads=''
@@ -1138,23 +1152,23 @@ d_vendorbin=''
 installvendorbin=''
 vendorbin=''
 vendorbinexp=''
-installvendorhtml1=''
-vendorhtml1=''
-vendorhtml1exp=''
-installvendorhtml3=''
-vendorhtml3=''
-vendorhtml3exp=''
+installvendorhtml1dir=''
+vendorhtml1dir=''
+vendorhtml1direxp=''
+installvendorhtml3dir=''
+vendorhtml3dir=''
+vendorhtml3direxp=''
 d_vendorlib=''
 installvendorlib=''
 vendorlib=''
 vendorlib_stem=''
 vendorlibexp=''
-installvendorman1=''
-vendorman1=''
-vendorman1exp=''
-installvendorman3=''
-vendorman3=''
-vendorman3exp=''
+installvendorman1dir=''
+vendorman1dir=''
+vendorman1direxp=''
+installvendorman3dir=''
+vendorman3dir=''
+vendorman3direxp=''
 usevendorprefix=''
 vendorprefix=''
 vendorprefixexp=''
@@ -1165,8 +1179,6 @@ vendorscriptexp=''
 versiononly=''
 defvoidused=''
 voidflags=''
-pm_apiversion=''
-xs_apiversion=''
 yacc=''
 yaccflags=''
 CONFIG=''
@@ -1195,12 +1207,23 @@ elif test -f "/system/gnu_library/bin/ar.pm"; then
 elif test -n "$DJGPP"; then
 : DOS DJGPP
     _exe=".exe"
-elif test -d c:/. ; then
+elif test -d c:/. -o -n "$is_os2" ; then
 : OS/2 or cygwin
     _exe=".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.
+: 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"
@@ -1209,12 +1232,6 @@ locincpth="$locincpth /opt/gnu/include /usr/GNU/include /opt/GNU/include"
 : no include file wanted by default
 inclwanted=''
 
-siteman1=''
-siteman3=''
-sitescript=''
-: Trailing extension.  Override this in a hint file, if needed.
-: Extra object files, if any, needed on this platform.
-archobjs=''
 groupstype=''
 libnames=''
 : change the next line if compiling for Xenix/286 on Xenix/386
@@ -1238,31 +1255,24 @@ plibpth=''
 libswanted=''
 : some systems want to use only the non-versioned libso:s
 ignore_versioned_solibs=''
-: full support for void wanted by default
-defvoidused=15
-
-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
+siteman1dir=''
+siteman3dir=''
+sitescript=''
 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.
-archname=''
 : set usethreads on the Configure command line to enable threads.
 usereentrant='undef'
+: 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="$libswanted ucb bsd BSD PW x util rt posix4"
+: If anyone needs extra -lxxx, put those in a hint file.
+libswanted="sfio socket bind inet nsl nm ndbm gdbm dbm db malloc dl dld ld sun"
+libswanted="$libswanted m crypt sec util c cposix posix ucb bsd BSD"
 : 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 " $glibpth " | sed -e 's! /usr/shlib ! !'`
@@ -2870,37 +2880,37 @@ ABYZ)
 	up='[:upper:]'
 	low='[:lower:]'
 	;;
-*)	# There is a discontinuity in EBCDIC between 'I' and 'J'
-        # (0xc9 and 0xd1), therefore that is a nice testing point.
-        if test "X$up" = X -o "X$low" = X; then
-	    case "`echo IJ | $tr '[I-J]' '[i-j]' 2>/dev/null`" in
-	    ij) up='[A-Z]'
-	        low='[a-z]'
+*)	# There is a discontinuity in EBCDIC between 'R' and 'S'
+	# (0xd9 and 0xe2), therefore that is a nice testing point.
+	if test "X$up" = X -o "X$low" = X; then
+	    case "`echo RS | $tr '[R-S]' '[r-s]' 2>/dev/null`" in
+	    rs) up='[A-Z]'
+		low='[a-z]'
 		;;
 	    esac
-        fi
+	fi
 	if test "X$up" = X -o "X$low" = X; then
-	    case "`echo IJ | $tr I-J i-j 2>/dev/null`" in
-	    ij) up='A-Z'
+	    case "`echo RS | $tr R-S r-s 2>/dev/null`" in
+	    rs) up='A-Z'
 		low='a-z'
 		;;
 	    esac
-        fi
+	fi
 	if test "X$up" = X -o "X$low" = X; then
-	    case "`echo IJ | od -x 2>/dev/null`" in
-	    *C9D1*|*c9d1*)
+	    case "`echo RS | od -x 2>/dev/null`" in
+	    *D9E2*|*d9e2*)
 		echo "Hey, this might be EBCDIC." >&4
 		if test "X$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]'
+		    case "`echo RS | $tr '[A-IJ-RS-Z]' '[a-ij-rs-z]' 2>/dev/null`" in
+		    rs) up='[A-IJ-RS-Z]'
+			low='[a-ij-rs-z]'
 			;;
 		    esac
 		fi
 		if test "X$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'
+		    case "`echo RS | $tr A-IJ-RS-Z a-ij-rs-z 2>/dev/null`" in
+		    rs) up='A-IJ-RS-Z'
+			low='a-ij-rs-z'
 			;;
 		    esac
 		fi
@@ -2908,8 +2918,8 @@ ABYZ)
 	    esac
 	fi
 esac
-case "`echo IJ | $tr \"$up\" \"$low\" 2>/dev/null`" in
-ij)
+case "`echo RS | $tr \"$up\" \"$low\" 2>/dev/null`" in
+rs)
     echo "Using $up and $low to convert case." >&4
     ;;
 *)
@@ -3075,7 +3085,9 @@ EOM
 		aix) osname=aix
 			tmp=`( (oslevel) 2>/dev/null || echo "not found") 2>&1`
 			case "$tmp" in
-			'not found') osvers="$4"."$3" ;;
+			# oslevel can fail with:
+			# oslevel: Unable to acquire lock.
+			*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 ;;
@@ -3097,7 +3109,7 @@ EOM
 		domainos) osname=apollo
 			osvers="$3"
 			;;
-		dgux) osname=dgux 
+		dgux)	osname=dgux 
 			osvers="$3"
 			;;
 		dynixptx*) osname=dynixptx
@@ -3105,23 +3117,25 @@ EOM
 			;;
 		freebsd) osname=freebsd 
 			osvers="$3" ;;
-		genix) osname=genix ;;
-		hp*) osname=hpux 
+		genix)	osname=genix ;;
+		gnu)	osname=gnu
+			osvers="$3" ;;
+		hp*)	osname=hpux 
 			osvers=`echo "$3" | $sed 's,.*\.\([0-9]*\.[0-9]*\),\1,'`
 			;;
-		irix*) osname=irix
+		irix*)	osname=irix
 			case "$3" in
 			4*) osvers=4 ;;
 			5*) osvers=5 ;;
 			*)	osvers="$3" ;;
 			esac
 			;;
-		linux) osname=linux
+		linux)	osname=linux
 			case "$3" in
 			*)	osvers="$3" ;;
 			esac
 			;;
-		MiNT) osname=mint
+		MiNT)	osname=mint
 			;;
 		netbsd*) osname=netbsd
 			osvers="$3"
@@ -3137,6 +3151,9 @@ EOM
 		openbsd) osname=openbsd
                 	osvers="$3"
                 	;;
+		os2)	osname=os2
+			osvers="$4"
+			;;
 		POSIX-BC | posix-bc ) osname=posix-bc
 			osvers="$3"
 			;;
@@ -3185,7 +3202,8 @@ EOM
 			mips)	osname=mips_osf1 ;;
 			esac
 			;;
-		unixware) osname=svr5
+		# UnixWare 7.1.2 is known as Open UNIX 8
+		openunix|unixware) osname=svr5
 			osvers="$4"
 			;;
 		uts)	osname=uts
@@ -3255,7 +3273,7 @@ EOM
 				osname=news_os
 			fi
 			$rm -f UU/kernel.what
-		elif test -d c:/.; then
+		elif test -d c:/. -o -n "$is_os2" ; then
 			set X $myuname
 			osname=os2
 			osvers="$5"
@@ -3448,12 +3466,15 @@ esac
 
 : 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`
+	cf_by=`(logname) 2>/dev/null`
 	case "$cf_by" in
-	"") cf_by=unknown ;;
+	"")
+		cf_by=`(whoami) 2>/dev/null`
+		case "$cf_by" in
+		"") cf_by=unknown ;;
+		esac ;;
 	esac ;;
 esac
 
@@ -3663,22 +3684,22 @@ 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
+if $test -f usethreads.cbu; then
+    echo "Your platform has some specific hints regarding threaded builds, using them..."
+    . ./usethreads.cbu
+else
+    case "$usethreads" in
+	"$define"|true|[yY]*)
 		$cat <<EOM
-(Your platform doesn't have any specific hints for threaded builds.
+(Your platform does not have any specific hints for threaded builds.
  Assuming POSIX threads, then.)
 EOM
-	fi
 	;;
-esac
+    esac
+fi
 
 cat <<EOM
 
@@ -4508,6 +4529,50 @@ case "$firstmakefile" in
 '') firstmakefile='makefile';;
 esac
 
+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
+
+: 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 $test -f uselongdouble.cbu; then
+    echo "Your platform has some specific hints regarding long doubles, using them..."
+    . ./uselongdouble.cbu
+else
+    case "$uselongdouble" in
+	$define)
+		$cat <<EOM
+(Your platform does not have any specific hints for long doubles.)
+EOM
+	;;
+    esac
+fi
+
 : Looking for optional libraries
 echo " "
 echo "Checking for optional libraries..." >&4
@@ -4650,6 +4715,7 @@ default|recommended)
 	2*) if test -d /etc/conf/kconfig.d &&
 			$contains _POSIX_VERSION $usrinc/sys/unistd.h >/dev/null 2>&1
 		then
+			# Interactive Systems (ISC) POSIX mode.
 			dflt="$dflt -posix"
 		fi
 		;;
@@ -4663,7 +4729,7 @@ default|recommended)
 		if $cc -O2 -fno-strict-aliasing -o gcctest gcctest.c; then
 			echo "Yes, it does." 2>&1
 			case "$ccflags" in
-			*strict-aliasing*) 
+			*strict-aliasing*)
 				echo "Leaving current flags $ccflags alone." 2>&1
 				;;
 			*) dflt="$dflt -fno-strict-aliasing" ;;
@@ -4673,6 +4739,40 @@ default|recommended)
 		fi
 		;;
 	esac
+	# For gcc, adding -pipe speeds up compilations for some, but apparently
+	# some assemblers can't read from stdin.  (It also slows down compilations
+	# in other cases, but those are apparently rarer these days.)  AD 5/2004.
+	case "$gccversion" in
+	?*)	echo " "
+		echo "Checking if your compiler accepts -pipe" 2>&1
+		echo 'int main(void) { return 0; }' > gcctest.c
+		if $cc -pipe -o gcctest gcctest.c; then
+			echo "Yes, it does." 2>&1
+			case "$ccflags" in
+			*-pipe*)
+				echo "Leaving current flags $ccflags alone." 2>&1
+				;;
+			*) dflt="$dflt -pipe" ;;
+			esac
+		else
+			echo "Nope, it doesn't, but that's ok." 2>&1
+		fi
+
+		echo "Checking if your compiler accepts -Wdeclaration-after-statement" 2>&1
+		echo 'int main(void) { return 0; }' > gcctest.c
+		if $cc -Wdeclaration-after-statement -o gcctest gcctest.c; then
+			echo "Yes, it does." 2>&1
+			case "$ccflags" in
+			*-Wdeclaration-after-statement*)
+				echo "Leaving current flags $ccflags alone." 2>&1
+				;;
+			*) dflt="$dflt -Wdeclaration-after-statement" ;;
+			esac
+		else
+			echo "Nope, it doesn't, but that's ok." 2>&1
+		fi
+		;;
+	esac
 	;;
 esac
 
@@ -4684,8 +4784,8 @@ 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$thisincl ";;
+			*" -I$thisincl "*);;
+			*) dflt="$dflt -I$thisincl ";;
 			esac
 		fi
 	fi
@@ -4816,7 +4916,7 @@ esac
 for thislibdir in $libpth; do
 	case " $loclibpth " in
 	*" $thislibdir "*)
-		case "$dflt " in 
+		case "$dflt " in
 		*"-L$thislibdir "*) ;;
 		*)  dflt="$dflt -L$thislibdir" ;;
 		esac
@@ -4855,7 +4955,7 @@ 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); }
+int main() { printf("Ok\n"); return(0); }
 EOF
 set X $cc -o try $optimize $ccflags $ldflags try.c $libs
 shift
@@ -4978,6 +5078,7 @@ echo "Your cpp writes the filename in the $pos field of the line."
 
 case "$osname" in
 vos) cppfilter="tr '\\\\>' '/' |" ;; # path component separator is >
+os2) cppfilter="sed -e 's|\\\\\\\\|/|g' |" ;; # path component separator is \
 *)   cppfilter='' ;;
 esac
 : locate header file
@@ -5392,15 +5493,15 @@ EOM
 	;;
 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
+if $test -f use64bitint.cbu; then
+	echo "Your platform has some specific hints regarding 64-bit integers, using them..."
+	. ./use64bitint.cbu
+fi
+case "$use64bitint" in
+"$define"|true|[yY]*)
 	case "$longsize" in
 	4) case "$archname64" in
 	   '') archname64=64int ;;
@@ -5410,15 +5511,15 @@ case "$use64bitint" in
 	;;
 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
+if $test -f use64bitall.cbu; then
+	echo "Your platform has some specific hints regarding 64-bit builds, using them..."
+	. ./use64bitall.cbu
+fi
+case "$use64bitall" in
+"$define"|true|[yY]*)
 	case "$longsize" in
 	4) case "$archname64" in
 	   ''|64int) archname64=64all ;;
@@ -5428,2195 +5529,1962 @@ case "$use64bitall" in
 	;;
 esac
 
+case "$d_quad:$use64bitint" in
+$undef:$define)
+	cat >&4 <<EOF
+
+*** You have chosen to use 64-bit integers,
+*** but none can be found.
+*** Please rerun Configure without -Duse64bitint and/or -Dusemorebits.
+*** Cannot continue, aborting.
+
+EOF
+	exit 1
+	;;
+esac
+
+: check for length of double
 echo " "
-echo "Checking for GNU C Library..." >&4
-cat >try.c <<'EOCP'
-/* Find out version of GNU C library.  __GLIBC__ and __GLIBC_MINOR__
-   alone are insufficient to distinguish different versions, such as
-   2.0.6 and 2.0.7.  The function gnu_get_libc_version() appeared in
-   libc version 2.1.0.      A. Dougherty,  June 3, 2002.
-*/
+case "$doublesize" in
+'')
+	echo "Checking to see how big your double precision numbers are..." >&4
+	$cat >try.c <<EOCP
 #include <stdio.h>
-int main(void)
-{
-#ifdef __GLIBC__
-#   ifdef __GLIBC_MINOR__
-#       if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1
-#           include <gnu/libc-version.h>
-	    printf("%s\n",  gnu_get_libc_version());
-#       else
-	    printf("%d.%d\n",  __GLIBC__, __GLIBC_MINOR__);
-#       endif
-#   else
-	printf("%d\n",  __GLIBC__);
-#   endif
-    return 0;
-#else
-    return 1;
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
 #endif
+int main()
+{
+    printf("%d\n", (int)sizeof(double));
+    exit(0);
 }
 EOCP
+	set try
+	if eval $compile_ok; then
+		doublesize=`$run ./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_ok && $run ./try > glibc.ver; then
+if eval $compile; then
 	val="$define"
-	gnulibc_version=`$cat glibc.ver`
-	echo "You are using the GNU C Library version $gnulibc_version"
+	echo "You have long double."
 else
 	val="$undef"
-	gnulibc_version=''
-	echo "You are not using the GNU C Library"
+	echo "You do not have long double."
 fi
-$rm -f try try.* glibc.ver
-set d_gnulibc
+$rm try.*
+set d_longdbl
 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
-	"$define")
+: check for length of long double
+case "${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 $compile; then
+		longdblsize=`$run ./try`
+		echo "Your long doubles are $longdblsize bytes long."
+	else
+		dflt='8'
 		echo " "
-		echo "nm probably won't work on the GNU C Library." >&4
-		dflt=n
-		;;
-	esac
-	case "$dflt" in
-	'') 
-		if $test "$osname" = aix -a "X$PASE" != "Xdefine" -a ! -f /lib/syscalls.exp; then
-			echo " "
-			echo "Whoops!  This is an AIX system without /lib/syscalls.exp!" >&4
-			echo "'nm' won't be sufficient on this sytem." >&4
-			dflt=n
-		fi
-		;;
-	esac
-	case "$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|$define) dflt=y;;
-	*) dflt=n;;
-	esac
+		echo "(I can't seem to compile the test program.  Guessing...)" >&4
+		rp="What is the size of a long double (in bytes)?"
+		. ./myread
+		longdblsize="$ans"
+	fi
+	if $test "X$doublesize" = "X$longdblsize"; then
+		echo "That isn't any different from an ordinary double."
+		echo "I'll keep your setting anyway, but you may see some"
+		echo "harmless compilation warnings."
+	fi	
 	;;
 esac
-$cat <<EOM
-
-I can use $nm to extract the symbols from your C libraries. This
-is a time consuming task which may generate huge output on the disk (up
-to 3 megabytes) but that should make the symbols extraction faster. The
-alternative is to skip the 'nm' extraction part and to compile a small
-test program instead to determine whether each symbol is present. If
-you have a fast C compiler and/or if your 'nm' output cannot be parsed,
-this may be the best solution.
-
-You probably shouldn't let me use 'nm' if you are using the GNU C Library.
+$rm -f try.* try
 
-EOM
-rp="Shall I use $nm to extract C symbols from the libraries?"
-. ./myread
-case "$ans" in
-[Nn]*) usenm=false;;
-*) usenm=true;;
+: 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 $myarchname.)"
+	archname=''
+	;;
 esac
-
-runnm=$usenm
-case "$reuseval" in
-true) runnm=false;;
+case "$targetarch" in
+'') ;;
+*)  archname=`echo $targetarch|sed 's,^[^-]*-,,'` ;;
 esac
-
-: nm options which may be necessary
-case "$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 $test -f /lib64/rld; then
-		nm_opt='-p'	# 64-bit Irix
-	else
-		nm_opt=''
-	fi;;
+myarchname="$tarch"
+case "$archname" in
+'') dflt="$tarch";;
+*) dflt="$archname";;
 esac
-
-: nm options which may be necessary for shared libraries but illegal
-: for archive libraries.  Thank you, Linux.
-case "$nm_so_opt" in
-'')	case "$myuname" in
-	*linux*)
-		if $nm --help | $grep 'dynamic' > /dev/null 2>&1; then
-			nm_so_opt='--dynamic'
-		fi
-		;;
-	esac
+rp='What is your architecture name'
+. ./myread
+archname="$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 $archname." >&4
+                ;;
+        esac
 	;;
 esac
-
-case "$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 $libpth`
-	esac
+case "$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 $archname." >&4
+                ;;
+        esac
 	;;
 esac
-case "$libs" in
-'') ;;
-*)  for thislib in $libs; do
-	case "$thislib" in
-	-lc|-lc_s)
-		: Handle C library specially below.
+case "$use64bitint$use64bitall" in
+*"$define"*)
+	case "$archname64" in
+	'')
+		echo "This architecture is naturally 64-bit, not changing architecture name." >&4
 		;;
-	-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 $try"
+	*)
+		case "$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
+	$doublesize)
+		echo "...but long doubles are equal to doubles, not changing architecture name." >&4
+		;;
+	*)
+		case "$archname" in
+	        *-ld*) echo "...and architecture name already has -ld." >&4
+	                ;;
+	        *)      archname="$archname-ld"
+	                echo "...setting architecture name to $archname." >&4
+        	        ;;
+	        esac
 		;;
-	*) libnames="$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
+case "$useperlio" in
+$define)
+	echo "Perlio selected." >&4
 	;;
 *)
-	set blurfl
+	echo "Perlio not selected, using stdio." >&4
+	case "$archname" in
+        *-stdio*) echo "...and architecture name already has -stdio." >&4
+                ;;
+        *)      archname="$archname-stdio"
+                echo "...setting architecture name to $archname." >&4
+                ;;
+        esac
 	;;
 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
+if $test -f archname.cbu; then
+	echo "Your platform has some specific hints for architecture name, using them..."
+	. ./archname.cbu
 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
-	$sed 's/^/	/' libpath
-	cat <<EOM
+: determine root of directory hierarchy where package will be installed.
+case "$prefix" in
+'')
+	dflt=`./loc . /usr/local /usr/local /local /opt /usr`
+	;;
+*?/)
+	dflt=`echo "$prefix" | sed 's/.$//'`
+	;;
+*)
+	dflt="$prefix"
+	;;
+esac
+$cat <<EOM
 
-None of these seems to contain your C library. I need to get its name...
+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
-fi
-fn=f
-rp='Where is your C library?'
+fn=d~
+rp='Installation prefix to use?'
 . ./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 $file 2>/dev/null;;
+oldprefix=''
+case "$prefix" in
+'') ;;
+*)
+	case "$ans" in
+	"$prefix") ;;
+	*) oldprefix="$prefix";;
 	esac
-done >libc.tmp
-
-$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"
-case "$PASE" in
-define)
-    echo " "
-    echo "Since you are compiling for PASE, extracting more symbols from libc.a ...">&4
-    dump -Tv /lib/libc.a | awk '$7 == "/unix" {print $5 " " $8}' | grep "^SV" | awk '{print $2}' >> libc.list
-    ;;
-*)  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]*[ 	]*$/\1/p' /lib/syscalls.exp >>libc.list
-    fi
-    ;;
-esac
-;;
+	;;
 esac
-$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 $inlibc
+prefix="$ans"
+prefixexp="$ansexp"
 
-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'
+case "$afsroot" in
+'')	afsroot=/afs ;;
+*)	afsroot=$afsroot ;;
+esac
 
-: check for length of double
+: is AFS running?
 echo " "
-case "$doublesize" in
-'')
-	echo "Checking to see how big your double precision numbers are..." >&4
-	$cat >try.c <<EOCP
-#include <stdio.h>
-#$i_stdlib I_STDLIB
-#ifdef I_STDLIB
-#include <stdlib.h>
-#endif
-int main()
-{
-    printf("%d\n", (int)sizeof(double));
-    exit(0);
-}
-EOCP
-	set try
-	if eval $compile_ok; then
-		doublesize=`$run ./try`
-		echo "Your double is $doublesize bytes long."
+case "$afs" in
+$define|true)	afs=true ;;
+$undef|false)	afs=false ;;
+*)	if test -d $afsroot; then
+		afs=true
 	else
-		dflt='8'
-		echo "(I can't seem to compile the test program.  Guessing...)"
-		rp="What is the size of a double precision number (in bytes)?"
-		. ./myread
-		doublesize="$ans"
+		afs=false
 	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."
+if $afs; then
+	echo "AFS may be running... I'll be extra cautious then..." >&4
 else
-	val="$undef"
-	echo "You do not have long double."
+	echo "AFS does not seem to be running..." >&4
 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 $compile; then
-		longdblsize=`$run ./try`
-		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 installation prefix for where package is to be installed.
+if $afs; then 
+$cat <<EOM
 
-echo " "
+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).
 
-if $test X"$d_longdbl" = X"$define"; then
+EOM
+	case "$installprefix" in
+	'') dflt=`echo $prefix | sed 's#^/afs/#/afs/.#'`;;
+	*) dflt="$installprefix";;
+	esac
+else
+$cat <<EOM
 
-echo "Checking how to print long doubles..." >&4
+In some special cases, particularly when building $package for distribution,
+it is convenient to distinguish the directory in which files should be
+installed from the directory ($prefix) in which they will
+eventually reside.  For most users, these two directories are the same.
 
-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 $compile; then
-		yyy=`$run ./try`
-		case "$yyy" in
-		123.456)
-			sPRIfldbl='"f"'; sPRIgldbl='"g"'; sPRIeldbl='"e"';
-                	sPRIFUldbl='"F"'; sPRIGUldbl='"G"'; sPRIEUldbl='"E"';
-			echo "We will use %f."
-			;;
-		esac
-	fi
+EOM
+	case "$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"
 
-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 $compile; then
-		yyy=`$run ./try`
-		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
+: 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'
 
-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 $compile; then
-		yyy=`$run ./try`
-		case "$yyy" in
-		123.456)
-			sPRIfldbl='"llf"'; sPRIgldbl='"llg"'; sPRIeldbl='"lle"';
-                	sPRIFUldbl='"llF"'; sPRIGUldbl='"llG"'; sPRIEUldbl='"llE"';
-			echo "We will use %llf."
-			;;
-		esac
-	fi
+: 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`
+       perl_patchlevel=`grep ',"DEVEL[0-9][0-9]*"' $rsrc/patchlevel.h|sed 's/[^0-9]//g'`
+else
+	revision=0
+	patchlevel=0
+	subversion=0
+	api_revision=0
+	api_version=0
+	api_subversion=0
+	perl_patchlevel=0
+	$echo "(You do not have patchlevel.h.  Eek.)"
 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 $compile; then
-		yyy=`$run ./try`
-		case "$yyy" in
-		123.456)
-			sPRIfldbl='"lf"'; sPRIgldbl='"lg"'; sPRIeldbl='"le"';
-                	sPRIFUldbl='"lF"'; sPRIGUldbl='"lG"'; sPRIEUldbl='"lE"';
-			echo "We will use %lf."
-			;;
-		esac
+if $test -r $rsrc/.patch ; then  
+	if $test "`cat $rsrc/.patch`" -gt "$perl_patchlevel" ; then
+		perl_patchlevel=`cat $rsrc/.patch`
 	fi
 fi
+: Define a handy string here to avoid duplication in myconfig.SH and configpm.
+version_patchlevel_string="version $patchlevel subversion $subversion"
+case "$perl_patchlevel" in
+0|'') ;;
+*) version_patchlevel_string="$version_patchlevel_string patch $perl_patchlevel" ;;
+esac
 
-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
+$echo "(You have $package $version_patchlevel_string.)"
 
-case "$sPRIfldbl" in
-'')	d_PRIfldbl="$undef"; d_PRIgldbl="$undef"; d_PRIeldbl="$undef"; 
-	d_PRIFUldbl="$undef"; d_PRIGUldbl="$undef"; d_PRIEUldbl="$undef"; 
-	d_SCNfldbl="$undef";
+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, $3 }'`
 	;;
-*)	d_PRIfldbl="$define"; d_PRIgldbl="$define"; d_PRIeldbl="$define"; 
-	d_PRIFUldbl="$define"; d_PRIGUldbl="$define"; d_PRIEUldbl="$define"; 
-	d_SCNfldbl="$define";
+*)
+	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
 
-: see if modfl exists
-set modfl d_modfl
-eval $inlibc
+: determine installation style
+: For now, try to deduce it from prefix unless it is already set.
+: Reproduce behavior of 5.005 and earlier, maybe drop that in 5.7.
+case "$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
 
-: see if prototype for modfl is available
-echo " "
-set d_modflproto modfl math.h
-eval $hasproto
+: determine where private library files go
+: Usual default is /usr/local/lib/perl5/$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
 
-d_modfl_pow32_bug="$undef"
+There are some auxiliary files for $package that need to be put into a
+private library directory that is accessible by everyone.
 
-case "$d_longdbl$d_modfl" in
-$define$define)
-	$cat <<EOM
-Checking to see whether your modfl() is okay for large values...
 EOM
-$cat >try.c <<EOCP
-#include <math.h> 
-#include <stdio.h>
-EOCP
-if $test "X$d_modflproto" != "X$define"; then
-	$cat >>try.c <<EOCP
-/* Sigh. many current glibcs provide the function, but do not prototype it.  */ 
-long double modfl (long double, long double *);
-EOCP
+fn=d~+
+rp='Pathname where the private library files will reside?'
+. ./getfile
+privlib="$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
-$cat >>try.c <<EOCP
-int main() {
-    long double nv = 4294967303.15;
-    long double v, w;
-    v = modfl(nv, &w);         
-#ifdef __GLIBC__
-    printf("glibc");
-#endif
-    printf(" %"$sPRIfldbl" %"$sPRIfldbl" %"$sPRIfldbl"\n", nv, v, w);
-    return 0;
-}
-EOCP
-	case "$osname:$gccversion" in
-	aix:)	saveccflags="$ccflags"
-		ccflags="$ccflags -qlongdouble" ;; # to avoid core dump
-	esac
-	set try
-	if eval $compile; then
-		foo=`$run ./try`
-		case "$foo" in
-		*" 4294967303.150000 1.150000 4294967302.000000")
-			echo >&4 "Your modfl() is broken for large values."
-			d_modfl_pow32_bug="$define"
-			case "$foo" in
-			glibc)	echo >&4 "You should upgrade your glibc to at least 2.2.2 to get a fixed modfl()."
-			;;
-			esac
-			;;
-		*" 4294967303.150000 0.150000 4294967303.000000")
-			echo >&4 "Your modfl() seems okay for large values."
-			;;
-		*)	echo >&4 "I don't understand your modfl() at all."
-			d_modfl="$undef"
-			;;
-		esac
-		$rm -f try.* try core core.try.*
-	else
-		echo "I cannot figure out whether your modfl() is okay, assuming it isn't."
-		d_modfl="$undef"
-	fi
-	case "$osname:$gccversion" in
-	aix:)	ccflags="$saveccflags" ;; # restore
-	esac
+
+: set the prefixup variable, to restore leading tilda escape
+prefixup='case "$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
 
-case "$ccflags" in
-*-DUSE_LONG_DOUBLE*|*-DUSE_MORE_BITS*) uselongdouble="$define" ;;
-esac
+$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.
 
-case "$uselongdouble" in
-$define|true|[yY]*)	dflt='y';;
-*) dflt='n';;
-esac
-cat <<EOM
+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
 
-Perl can be built to take advantage of long doubles which
-(if available) may give more accuracy and range for floating point numbers.
+: 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.)
 
-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
+
+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
 
-case "$uselongdouble" in
-true|[yY]*) uselongdouble="$define" ;;
-esac
+$rm -f reflect flect
 
-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
-		$cat <<EOM
-(Your platform doesn't have any specific hints for long doubles.)
-EOM
-	fi
+: now see if they want to do setuid emulation
+echo " "
+val="$undef"
+case "$d_suidsafe" in
+"$define")
+	val="$undef"
+	echo "No need to emulate SUID scripts since they are secure here." >&4
 	;;
-esac
+*)
+	$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.
 
-message=X
-case "$uselongdouble:$d_sqrtl:$d_modfl" in
-$define:$define:$define)
-	: You have both
-	;;
-$define:$define:$undef)
-	message="I could not find modfl"
-	;;
-$define:$undef:$define)
-	message="I could not find sqrtl"
-	;;
-$define:$undef:$undef)
-	message="I found neither sqrtl nor modfl"
+EOM
+	case "$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
 
-if $test "$message" != X; then
-	$cat <<EOM >&4
-
-*** You requested the use of long doubles but you do not seem to have
-*** the mathematic functions for long doubles.
-*** ($message)
-*** I'm disabling the use of long doubles.
-
-EOM
-
-	uselongdouble=$undef
+: see if this is a malloc.h system
+: we want a real compile instead of Inhdr because some systems have a
+: malloc.h that just gives a compile error saying to use stdlib.h instead
+echo " "
+$cat >try.c <<EOCP
+#include <stdlib.h>
+#include <malloc.h>
+int main () { return 0; }
+EOCP
+set try
+if eval $compile; then
+    echo "<malloc.h> found." >&4
+    val="$define"
+else
+    echo "<malloc.h> NOT found." >&4
+    val="$undef"
 fi
+$rm -f try.c try
+set i_malloc
+eval $setvar
 
-: determine the architecture name
+: check for void type
 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`
+echo "Checking to see how well your C compiler groks the void type..." >&4
+case "$voidflags" in
+'')
+	$cat >try.c <<EOCP
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
+#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:"
+			$cat .out
+		fi
 	else
-		tarch="$osname"
-	fi
-	$rm -f tmparch
-else
-	tarch="$osname"
-fi
-case "$myarchname" in
-''|"$tarch") ;;
-*)
-	echo "(Your architecture name used to be $myarchname.)"
-	archname=''
-	;;
-esac
-case "$targetarch" in
-'') ;;
-*)  archname=`echo $targetarch|sed 's,^[^-]*-,,'` ;;
-esac
-myarchname="$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
-	$doublesize)
-		echo "...but long doubles are equal to doubles, not changing architecture name." >&4
-		;;
-	*)
-		case "$archname" in
-	        *-ld*) echo "...and architecture name already has -ld." >&4
-	                ;;
-	        *)      archname="$archname-ld"
-	                echo "...setting architecture name to $archname." >&4
-        	        ;;
-	        esac
-		;;
-	esac
-	;;
-esac
-case "$useperlio" in
-$define)
-	echo "Perlio selected." >&4
-	;;
-*)
-	echo "Perlio not selected, using stdio." >&4
-	case "$archname" in
-        *-stdio*) echo "...and architecture name already has -stdio." >&4
-                ;;
-        *)      archname="$archname-stdio"
-                echo "...setting architecture name to $archname." >&4
-                ;;
-        esac
+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
 
-: determine root of directory hierarchy where package will be installed.
-case "$prefix" in
+: check for length of pointer
+echo " "
+case "$ptrsize" in
 '')
-	dflt=`./loc . /usr/local /usr/local /local /opt /usr`
-	;;
-*?/)
-	dflt=`echo "$prefix" | sed 's/.$//'`
-	;;
-*)
-	dflt="$prefix"
+	echo "Checking to see how big your pointers are..." >&4
+	if test "$voidflags" -gt 7; then
+		echo '#define VOID_PTR char *' > try.c
+	else
+		echo '#define VOID_PTR void *' > try.c
+	fi
+	$cat >>try.c <<EOCP
+#include <stdio.h>
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
+int main()
+{
+    printf("%d\n", (int)sizeof(VOID_PTR));
+    exit(0);
+}
+EOCP
+	set try
+	if eval $compile_ok; then
+		ptrsize=`$run ./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
-$cat <<EOM
+$rm -f try.c try
+case "$use64bitall" in
+"$define"|true|[yY]*)
+	case "$ptrsize" in
+	4)	cat <<EOM >&4
 
-By default, $package will be installed in $dflt/bin, manual pages
-under $dflt/man, etc..., i.e. with $dflt as prefix for all
-installation directories. Typically this is something like /usr/local.
-If you wish to have binaries under /usr/bin but other parts of the
-installation under /usr/local, that's ok: you will be prompted
-separately for each of the installation directories, the prefix being
-only used to set the defaults.
+*** You have chosen a maximally 64-bit build,
+*** but your pointers are only 4 bytes wide.
+*** Please rerun Configure without -Duse64bitall.
+EOM
+		case "$d_quad" in
+		define)
+			cat <<EOM >&4
+*** Since you have quads, you could possibly try with -Duse64bitint.
+EOM
+			;;
+		esac
+		cat <<EOM >&4
+*** Cannot continue, aborting.
 
 EOM
-fn=d~
-rp='Installation prefix to use?'
-. ./getfile
-oldprefix=''
-case "$prefix" in
-'') ;;
-*)
-	case "$ans" in
-	"$prefix") ;;
-	*) oldprefix="$prefix";;
+
+		exit 1
+		;;
 	esac
 	;;
 esac
-prefix="$ans"
-prefixexp="$ansexp"
 
-case "$afsroot" in
-'')	afsroot=/afs ;;
-*)	afsroot=$afsroot ;;
-esac
 
-: is AFS running?
+: determine whether to use malloc wrapping
 echo " "
-case "$afs" in
-$define|true)	afs=true ;;
-$undef|false)	afs=false ;;
-*)	if test -d $afsroot; then
-		afs=true
-	else
-		afs=false
-	fi
+case "$usemallocwrap" in
+[yY]*|true|$define)	dflt='y' ;;
+[nN]*|false|$undef)	dflt='n' ;;
+*)	case "$usedevel" in
+	[yY]*|true|$define)	dflt='y' ;;
+	*) dflt='n' ;;
+	esac
 	;;
 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).
+rp="Do you wish to wrap malloc calls to protect against potential overflows?"
+. ./myread
+usemallocwrap="$ans"
+case "$ans" in
+y*|true)
+	usemallocwrap="$define" ;;
+*)
+	usemallocwrap="$undef" ;;
+esac
 
-EOM
-	case "$installprefix" in
-	'') dflt=`echo $prefix | sed 's#^/afs/#/afs/.#'`;;
-	*) dflt="$installprefix";;
+: determine which malloc to compile in
+echo " "
+case "$usemymalloc" in
+[yY]*|true|$define)	dflt='y' ;;
+[nN]*|false|$undef)	dflt='n' ;;
+*)	case "$ptrsize" in
+	4) dflt='y' ;;
+	*) dflt='n' ;;
 	esac
-else
-$cat <<EOM
-
-In some special cases, particularly when building $package for distribution,
-it is convenient to distinguish the directory in which files should be
-installed from the directory ($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
+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 = $libs" >&4
+		;;
 	esac
-fi
-fn=d~
-rp='What installation prefix should I use for installing files?'
-. ./getfile
-installprefix="$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'
+	usemymalloc='n'
+	mallocsrc=''
+	mallocobj=''
+	d_mymalloc="$undef"
+	;;
+esac
 
-: get the patchlevel
+: compute the return types of malloc and free
 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`
-       perl_patchlevel=`grep ',"DEVEL[0-9][0-9]*"' $rsrc/patchlevel.h|sed 's/[^0-9]//g'`
-else
-	revision=0
-	patchlevel=0
-	subversion=0
-	api_revision=0
-	api_version=0
-	api_subversion=0
-	perl_patchlevel=0
-	$echo "(You do not have patchlevel.h.  Eek.)"
-fi
-if $test -r $rsrc/.patch ; then  
-	if $test "`cat $rsrc/.patch`" -gt "$perl_patchlevel" ; then
-		perl_patchlevel=`cat $rsrc/.patch`
+$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
-fi
-: Define a handy string here to avoid duplication in myconfig.SH and configpm.
-version_patchlevel_string="version $patchlevel subversion $subversion"
-case "$perl_patchlevel" in
-0|'') ;;
-*) version_patchlevel_string="$version_patchlevel_string patch $perl_patchlevel" ;;
+	;;
 esac
+echo "Your system wants malloc to return '$malloctype', it would seem." >&4
 
-$echo "(You have $package $version_patchlevel_string.)"
-
-case "$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, $3 }'`
+case "$freetype" in
+'')
+	if $cc $ccflags -c -DTRY_FREE malloc.c >/dev/null 2>&1; then
+		freetype='void'
+	else
+		freetype='int'
+	fi
 	;;
 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
+echo "Your system uses $freetype free(), it would seem." >&4
+$rm -f malloc.[co]
+$cat <<EOM
 
-: 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' ;;
+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
 	;;
-*)	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
+siteprefix="$ans"
+siteprefixexp="$ansexp"
 
-: 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.
+: determine where site specific libraries go.
+: Usual default is /usr/local/lib/perl5/site_perl/$version
 : The default "style" setting is made in installstyle.U
-case "$installstyle" in
-*lib/perl5*) set dflt privlib lib/$package/$version ;;
-*)	 set dflt privlib lib/$version ;;
+: 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
-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.
+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 where the private library files will reside?'
+rp='Pathname for the site-specific library files?'
 . ./getfile
-privlib="$ans"
-privlibexp="$ansexp"
+sitelib="$ans"
+sitelibexp="$ansexp"
+sitelib_stem=`echo "$sitelibexp" | sed "s,/$version$,,"`
 : Change installation prefix, if necessary.
 if $test X"$prefix" != X"$installprefix"; then
-	installprivlib=`echo $privlibexp | sed "s#^$prefix#$installprefix#"`
+	installsitelib=`echo $sitelibexp | $sed "s#^$prefix#$installprefix#"`
 else
-	installprivlib="$privlibexp"
+	installsitelib="$sitelibexp"
 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
+: 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="$sitearch"
 	;;
-*)	dflt="$archlib"
-    ;;
 esac
+set sitearch sitearch none
+eval $prefixit
 $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.
+The installation process will also create a directory for
+architecture-dependent site-specific extensions and modules.
 
 EOM
-fn=d+~
-rp='Where do you want to put the public architecture-dependent libraries?'
+fn=d~+
+rp='Pathname for the site-specific architecture-dependent library files?'
 . ./getfile
-archlib="$ans"
-archlibexp="$ansexp"
-if $test X"$archlib" = X"$privlib"; then
-	d_archlib="$undef"
-else
-	d_archlib="$define"
-fi
+sitearch="$ans"
+sitearchexp="$ansexp"
 : Change installation prefix, if necessary.
 if $test X"$prefix" != X"$installprefix"; then
-	installarchlib=`echo $archlibexp | sed "s#^$prefix#$installprefix#"`
+	installsitearch=`echo $sitearchexp | sed "s#^$prefix#$installprefix#"`
 else
-	installarchlib="$archlibexp"
+	installsitearch="$sitearchexp"
 fi
 
-: 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
+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.
 
-$rm -f reflect flect
+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.
 
-: 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.
+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
-	case "$d_dosuid" in
-	"$define") dflt=y ;;
-	*) dflt=n ;;
+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
-	rp="Do you want to do setuid/setgid emulation?"
-	. ./myread
-	case "$ans" in
-	[yY]*)	val="$define";;
-	*)	val="$undef";;
+	;;
+esac
+. ./myread
+case "$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
-set d_dosuid
-eval $setvar
 
-: see if this is a malloc.h system
-: we want a real compile instead of Inhdr because some systems have a
-: malloc.h that just gives a compile error saying to use stdlib.h instead
-echo " "
-$cat >try.c <<EOCP
-#include <stdlib.h>
-#include <malloc.h>
-int main () { return 0; }
-EOCP
-set try
-if eval $compile; then
-    echo "<malloc.h> found." >&4
-    val="$define"
+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#$installprefix#"`
 else
-    echo "<malloc.h> NOT found." >&4
-    val="$undef"
+	installvendorlib="$vendorlibexp"
 fi
-$rm -f try.c try
-set i_malloc
-eval $setvar
-
-: check for void type
-echo " "
-echo "Checking to see how well your C compiler groks the void type..." >&4
-case "$voidflags" in
-'')
-	$cat >try.c <<EOCP
-#$i_stdlib I_STDLIB
-#ifdef I_STDLIB
-#include <stdlib.h>
-#endif
-#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="$ans"
+case "$vendorprefix" in
+'')	d_vendorarch="$undef"
+	vendorarch=''
+	vendorarchexp=''
 	;;
-esac
-$rm -f try.* .out
-
-: 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
-	$cat >>try.c <<EOCP
-#include <stdio.h>
-#$i_stdlib I_STDLIB
-#ifdef I_STDLIB
-#include <stdlib.h>
-#endif
-int main()
-{
-    printf("%d\n", (int)sizeof(VOID_PTR));
-    exit(0);
-}
-EOCP
-	set try
-	if eval $compile_ok; then
-		ptrsize=`$run ./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
+*)	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="$ansexp"
 	;;
 esac
-$rm -f try.c try
-case "$use64bitall" in
-"$define"|true|[yY]*)
-	case "$ptrsize" in
-	4)	cat <<EOM >&4
-
-*** You have chosen a maximally 64-bit build, but your pointers
-*** are only 4 bytes wide, disabling maximal 64-bitness.
-
-EOM
-		use64bitall="$undef"
-		case "$use64bitint" in
-		"$define"|true|[yY]*) ;;
-		*)	cat <<EOM >&4
+: Change installation prefix, if necessary.
+if $test X"$prefix" != X"$installprefix"; then
+	installvendorarch=`echo $vendorarchexp | sed "s#^$prefix#$installprefix#"`
+else
+	installvendorarch="$vendorarchexp"
+fi
 
-*** Downgrading from maximal 64-bitness to using 64-bit integers.
+: 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 
+	$sitelib 
 EOM
-			use64bitint="$define"
-			;;
-		esac
-		;;
-	esac
-	;;
+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
 
-: determine which malloc to compile in
-echo " "
-case "$usemymalloc" in
-[yY]*|true|$define)	dflt='y' ;;
-[nN]*|false|$undef)	dflt='n' ;;
-*)	case "$ptrsize" in
-	4) dflt='y' ;;
-	*) dflt='n' ;;
-	esac
-	;;
-esac
-rp="Do you wish to attempt to use the malloc that comes with $package?"
+rp='Colon-separated list of additional directories for perl to search?'
 . ./myread
-usemymalloc="$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"
-	;;
+' '|''|none)	otherlibdirs=' ' ;;     
+*)	otherlibdirs="$ans" ;;
 esac
+case "$otherlibdirs" in
+' ') val=$undef ;;
+*)	val=$define ;;
+esac
+set d_perl_otherlibdirs
+eval $setvar
 
-: compute the return types of malloc and free
+: Cruising for prototypes
 echo " "
-$cat >malloc.c <<END
-#$i_malloc I_MALLOC
+echo "Checking out function prototypes..." >&4
+$cat >prototype.c <<EOCP
 #$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
+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 "$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]
-$cat <<EOM
+case "$prototype" in
+"$define") ;;
+*)	ansi2knr='ansi2knr'
+	echo " "
+	cat <<EOM >&4
 
-After $package is installed, you may wish to install various
-add-on modules and utilities.  Typically, these add-ons will
-be installed under $prefix with the rest
-of this package.  However, you may wish to install such add-ons
-elsewhere under a different prefix.
+$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 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.
+If GNU cc is available for your system, perhaps you could try that instead.  
 
-The default should be fine for most people.
+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
-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 ;;
+	exit 2
+	;;
 esac
+
+: determine where public executables go
+echo " "
+set dflt bin bin
+eval $prefixit
+fn=d~
+rp='Pathname where the public executables will reside?'
 . ./getfile
-: XXX Prefixit unit does not yet support siteprefix and vendorprefix
-oldsiteprefix=''
-case "$siteprefix" in
-'') ;;
-*)	case "$ans" in
-	"$prefix") ;;
-	*) oldsiteprefix="$prefix";;
-	esac
-	;;
+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
+
+echo " "
+case "$extras" in
+'') dflt='n';;
+*) dflt='y';;
 esac
-siteprefix="$ans"
-siteprefixexp="$ansexp"
+cat <<EOM
+Perl can be built with extra modules or bundles of modules which
+will be fetched from the CPAN and installed alongside Perl.
 
-: 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/$version ;;
-	esac
+Notice that you will need access to the CPAN; either via the Internet,
+or a local copy, for example a CD-ROM or a local CPAN mirror.  (You will
+be asked later to configure the CPAN.pm module which will in turn do
+the installation of the rest of the extra modules or bundles.)
+
+Notice also that if the modules require any external software such as
+libraries and headers (the libz library and the zlib.h header for the
+Compress::Zlib module, for example) you MUST have any such software
+already installed, this configuration process will NOT install such
+things for you.
+
+If this doesn't make any sense to you, just accept the default '$dflt'.
+EOM
+rp='Install any extra modules (y or n)?'
+. ./myread
+case "$ans" in
+y|Y)
+	cat <<EOM
+
+Please list any extra modules or bundles to be installed from CPAN,
+with spaces between the names.  The names can be in any format the
+'install' command of CPAN.pm will understand.  (Answer 'none',
+without the quotes, to install no extra modules or bundles.)
+EOM
+	rp='Extras?'
+	dflt="$extras"
+	. ./myread
+	extras="$ans"
+esac
+case "$extras" in
+''|'none')
+	val=''
+	$rm -f ../extras.lst
 	;;
-*)	dflt="$sitelib"
+*)	echo "(Saving the list of extras for later...)"
+	echo "$extras" > ../extras.lst
+	val="'$extras'"
 	;;
 esac
-$cat <<EOM
+set extras
+eval $setvar
+echo " "
 
-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.
+: determine where html pages for programs go
+set html1dir html1dir none
+eval $prefixit
+$cat <<EOM
 
+If you wish to install html files for programs in $spackage, indicate 
+the appropriate directory here.  To skip installing html files,
+answer "none".
 EOM
-fn=d~+
-rp='Pathname for the site-specific library files?'
+case "$html1dir" in
+''|none|$undef|' ') dflt=none ;;
+*) dflt=$html1dir ;;
+esac
+fn=dn+~
+rp="Directory for the main $spackage html pages?"
 . ./getfile
-sitelib="$ans"
-sitelibexp="$ansexp"
-sitelib_stem=`echo "$sitelibexp" | sed "s,/$version$,,"`
+html1dir="$ans"
+html1direxp="$ansexp"
+: Use ' ' for none so value is preserved next time through Configure
+$test X"$html1dir" = "X" && html1dir=' '
 : Change installation prefix, if necessary.
 if $test X"$prefix" != X"$installprefix"; then
-	installsitelib=`echo $sitelibexp | $sed "s#^$prefix#$installprefix#"`
+	installhtml1dir=`echo $html1direxp | sed "s#^$prefix#$installprefix#"`
 else
-	installsitelib="$sitelibexp"
+	installhtml1dir="$html1direxp"
 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
+: determine where html pages for libraries and modules go
+set html3dir html3dir none
 eval $prefixit
 $cat <<EOM
 
-The installation process will also create a directory for
-architecture-dependent site-specific extensions and modules.
-
+If you wish to install html files for modules associated with $spackage,
+indicate the appropriate directory here.  To skip installing html files,
+answer "none".
 EOM
-fn=d~+
-rp='Pathname for the site-specific architecture-dependent library files?'
+: There is no obvious default.  If they have specified html1dir, then
+: try to key off that, possibly changing .../html1 into .../html3.
+case "$html3dir" in
+'') html3dir=`echo "$html1dir" | $sed 's/1$/3$/'` ;;
+*) dflt=$html3dir ;;
+esac
+fn=dn+~
+rp="Directory for the $spackage module html pages?"
 . ./getfile
-sitearch="$ans"
-sitearchexp="$ansexp"
+html3dir="$ans"
+html3direxp="$ansexp"
+: Use ' ' for none so value is preserved next time through Configure
+$test X"$html3dir" = "X" && html3dir=' '
 : Change installation prefix, if necessary.
 if $test X"$prefix" != X"$installprefix"; then
-	installsitearch=`echo $sitearchexp | sed "s#^$prefix#$installprefix#"`
+	installhtml3dir=`echo $html3direxp | sed "s#^$prefix#$installprefix#"`
 else
-	installsitearch="$sitearchexp"
+	installhtml3dir="$html3direxp"
 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="$ansexp"
+: Find perl5.005 or later.
+echo "Looking for a previously installed perl5.005 or later... "
+case "$perl5" in
+'')	for tdir in `echo "$binexp$path_sep$PATH" | $sed "s/$path_sep/ /g"`; do
+		: Check if this perl is recent and can load a simple module
+		if $test -x $tdir/perl$exe_ext && $tdir/perl -Mless -e 'use 5.005;' >/dev/null 2>&1; then
+			perl5=$tdir/perl
+			break;
+		elif $test -x $tdir/perl5$exe_ext && $tdir/perl5 -Mless -e 'use 5.005;' >/dev/null 2>&1; then
+			perl5=$tdir/perl5
+			break;
+		fi
+	done
 	;;
-*)	usevendorprefix="$undef"
-	vendorprefix=''
-	vendorprefixexp=''
+*)	perl5="$perl5"
 	;;
 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="$ansexp"
-	;;
+case "$perl5" in
+'')	echo "None found.  That's ok.";;
+*)	echo "Using $perl5." ;;
 esac
-vendorlib_stem=`echo "$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="$ansexp"
+: Determine list of previous versions to include in @INC
+$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 "$perl5$exe_ext"; then
+		dflt=`$perl5 getverlist`
+	else
+		dflt='none'
+	fi
 	;;
+$undef) dflt='none' ;;
+*)  eval dflt=\"$inc_version_list\" ;;
+esac
+case "$dflt" in
+''|' ') dflt=none ;;
 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="$otherlibdirs" ;;
+case "$dflt" in
+5.005) dflt=none ;;
 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.
 
+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='Colon-separated list of additional directories for perl to search?'
+rp='List of earlier versions to include in @INC?'
 . ./myread
 case "$ans" in
-' '|''|none)	otherlibdirs=' ' ;;     
-*)	otherlibdirs="$ans" ;;
+[Nn]one|''|' '|$undef) inc_version_list=' ' ;;
+*) inc_version_list="$ans" ;;
 esac
-case "$otherlibdirs" in
-' ') val=$undef ;;
-*)	val=$define ;;
+case "$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
-set d_perl_otherlibdirs
-eval $setvar
+$rm -f getverlist
+
+: determine whether to install perl also as /usr/bin/perl
 
-: 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*
+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.
 
-case "$prototype" in
-"$define") ;;
-*)	ansi2knr='ansi2knr'
-	echo " "
-	cat <<EOM >&4
+If you want to, I can install the perl you are about to compile
+as /usr/bin/perl (in addition to $bin/perl).
+EOM
+	if test -f /usr/bin/perl; then
+	    $cat <<EOM
 
-$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.
+However, please note that because you already have a /usr/bin/perl,
+overwriting that with a new Perl would very probably cause problems.
+Therefore I'm assuming you don't want to do that (unless you insist).
 
-If GNU cc is available for your system, perhaps you could try that instead.  
+EOM
+	    case "$installusrbinperl" in
+	    "$define"|[yY]*)	dflt='y';;
+	    *)			dflt='n';;
+	    esac
+	else
+	    $cat <<EOM
 
-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>.
+Since you don't have a /usr/bin/perl I'm assuming creating one is okay.
 
-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#$installprefix#"`
+	    case "$installusrbinperl" in
+	    "$undef"|[nN]*)	dflt='n';;
+	    *)			dflt='y';;
+	    esac
+	fi
+	rp="Do you want to install perl as /usr/bin/perl?"
+	. ./myread
+	case "$ans" in
+	[yY]*)	val="$define";;
+	*)	val="$undef" ;;
+	esac
 else
-	installbin="$binexp"
+	val="$undef"
 fi
+set installusrbinperl
+eval $setvar
 
 echo " "
-case "$extras" in
-'') dflt='n';;
-*) dflt='y';;
-esac
-cat <<EOM
-Perl can be built with extra modules or bundles of modules which
-will be fetched from the CPAN and installed alongside Perl.
-
-Notice that you will need access to the CPAN; either via the Internet,
-or a local copy, for example a CD-ROM or a local CPAN mirror.  (You will
-be asked later to configure the CPAN.pm module which will in turn do
-the installation of the rest of the extra modules or bundles.)
-
-Notice also that if the modules require any external software such as
-libraries and headers (the libz library and the zlib.h header for the
-Compress::Zlib module, for example) you MUST have any such software
-already installed, this configuration process will NOT install such
-things for you.
-
-If this doesn't make any sense to you, just accept the default '$dflt'.
-EOM
-rp='Install any extra modules (y or n)?'
-. ./myread
-case "$ans" in
-y|Y)
-	cat <<EOM
+echo "Checking for GNU C Library..." >&4
+cat >try.c <<'EOCP'
+/* Find out version of GNU C library.  __GLIBC__ and __GLIBC_MINOR__
+   alone are insufficient to distinguish different versions, such as
+   2.0.6 and 2.0.7.  The function gnu_get_libc_version() appeared in
+   libc version 2.1.0.      A. Dougherty,  June 3, 2002.
+*/
+#include <stdio.h>
+int main(void)
+{
+#ifdef __GLIBC__
+#   ifdef __GLIBC_MINOR__
+#       if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1
+#           include <gnu/libc-version.h>
+	    printf("%s\n",  gnu_get_libc_version());
+#       else
+	    printf("%d.%d\n",  __GLIBC__, __GLIBC_MINOR__);
+#       endif
+#   else
+	printf("%d\n",  __GLIBC__);
+#   endif
+    return 0;
+#else
+    return 1;
+#endif
+}
+EOCP
+set try
+if eval $compile_ok && $run ./try > glibc.ver; then
+	val="$define"
+	gnulibc_version=`$cat glibc.ver`
+	echo "You are using the GNU C Library version $gnulibc_version"
+else
+	val="$undef"
+	gnulibc_version=''
+	echo "You are not using the GNU C Library"
+fi
+$rm -f try try.* glibc.ver
+set d_gnulibc
+eval $setvar
 
-Please list any extra modules or bundles to be installed from CPAN,
-with spaces between the names.  The names can be in any format the
-'install' command of CPAN.pm will understand.  (Answer 'none',
-without the quotes, to install no extra modules or bundles.)
-EOM
-	rp='Extras?'
-	dflt="$extras"
-	. ./myread
-	extras="$ans"
-esac
-case "$extras" in
-''|'none')
-	val=''
-	$rm -f ../extras.lst
+: see if nm is to be used to determine whether a symbol is defined or not
+case "$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 "X$PASE" != "Xdefine" -a ! -f /lib/syscalls.exp; then
+			echo " "
+			echo "Whoops!  This is an AIX system without /lib/syscalls.exp!" >&4
+			echo "'nm' won't be sufficient on this sytem." >&4
+			dflt=n
+		fi
+		;;
+	esac
+	case "$dflt" in
+	'') dflt=`$egrep 'inlibc|csym' $rsrc/Configure | wc -l 2>/dev/null`
+		if $test $dflt -gt 20; then
+			dflt=y
+		else
+			dflt=n
+		fi
+		;;
+	esac
 	;;
-*)	echo "(Saving the list of extras for later...)"
-	echo "$extras" > ../extras.lst
-	val="'$extras'"
+*)
+	case "$usenm" in
+	true|$define) dflt=y;;
+	*) dflt=n;;
+	esac
 	;;
 esac
-set extras
-eval $setvar
-echo " "
-
-: determine where html pages for programs go
-set html1dir html1dir none
-eval $prefixit
 $cat <<EOM
 
-If you wish to install html files for programs in $spackage, indicate 
-the appropriate directory here.  To skip installing html files,
-answer "none".
+I can use $nm to extract the symbols from your C libraries. This
+is a time consuming task which may generate huge output on the disk (up
+to 3 megabytes) but that should make the symbols extraction faster. The
+alternative is to skip the 'nm' extraction part and to compile a small
+test program instead to determine whether each symbol is present. If
+you have a fast C compiler and/or if your 'nm' output cannot be parsed,
+this may be the best solution.
+
+You probably shouldn't let me use 'nm' if you are using the GNU C Library.
+
 EOM
-case "$html1dir" in
-''|none|$undef|' ') dflt=none ;;
-*) dflt=$html1dir ;;
+rp="Shall I use $nm to extract C symbols from the libraries?"
+. ./myread
+case "$ans" in
+[Nn]*) usenm=false;;
+*) usenm=true;;
 esac
-fn=dn+~
-rp="Directory for the main $spackage html pages?"
-. ./getfile
-html1dir="$ans"
-html1direxp="$ansexp"
-: Use ' ' for none so value is preserved next time through Configure
-$test X"$html1dir" = "X" && html1dir=' '
-: Change installation prefix, if necessary.
-if $test X"$prefix" != X"$installprefix"; then
-	installhtml1dir=`echo $html1direxp | sed "s#^$prefix#$installprefix#"`
-else
-	installhtml1dir="$html1direxp"
-fi
 
-: determine where html pages for libraries and modules go
-set html3dir html3dir none
-eval $prefixit
-$cat <<EOM
+runnm=$usenm
+case "$reuseval" in
+true) runnm=false;;
+esac
 
-If you wish to install html files for modules associated with $spackage,
-indicate the appropriate directory here.  To skip installing html files,
-answer "none".
-EOM
-: There is no obvious default.  If they have specified html1dir, then
-: try to key off that, possibly changing .../html1 into .../html3.
-case "$html3dir" in
-'') html3dir=`echo "$html1dir" | $sed 's/1$/3$/'` ;;
-*) dflt=$html3dir ;;
+: 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
-fn=dn+~
-rp="Directory for the $spackage module html pages?"
-. ./getfile
-html3dir="$ans"
-html3direxp="$ansexp"
-: Use ' ' for none so value is preserved next time through Configure
-$test X"$html3dir" = "X" && html3dir=' '
-: Change installation prefix, if necessary.
-if $test X"$prefix" != X"$installprefix"; then
-	installhtml3dir=`echo $html3direxp | sed "s#^$prefix#$installprefix#"`
-else
-	installhtml3dir="$html3direxp"
-fi
 
-: Find perl5.005 or later.
-echo "Looking for a previously installed perl5.005 or later... "
-case "$perl5" in
-'')	for tdir in `echo "$binexp$path_sep$PATH" | $sed "s/$path_sep/ /g"`; do
-		: Check if this perl is recent and can load a simple module
-		if $test -x $tdir/perl$exe_ext && $tdir/perl -Mless -e 'use 5.005;' >/dev/null 2>&1; then
-			perl5=$tdir/perl
-			break;
-		elif $test -x $tdir/perl5$exe_ext && $tdir/perl5 -Mless -e 'use 5.005;' >/dev/null 2>&1; then
-			perl5=$tdir/perl5
-			break;
+: 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*|gnu*)
+		if $nm --help | $grep 'dynamic' > /dev/null 2>&1; then
+			nm_so_opt='--dynamic'
 		fi
-	done
+		;;
+	esac
 	;;
-*)	perl5="$perl5"
+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 $libpth`
+	esac
 	;;
 esac
-case "$perl5" in
-'')	echo "None found.  That's ok.";;
-*)	echo "Using $perl5." ;;
+case "$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 $thislib" ;;
+	esac
+	done
+	;;
 esac
-
-: Determine list of previous versions to include in @INC
-$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 "$perl5$exe_ext"; then
-		dflt=`$perl5 getverlist`
+xxx=normal
+case "$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
-		dflt='none'
+		tans=`./loc Llibc$_a blurfl/dyick $xlibpth`
 	fi
-	;;
-$undef) dflt='none' ;;
-*)  eval dflt=\"$inc_version_list\" ;;
-esac
-case "$dflt" in
-''|' ') dflt=none ;;
-esac
-case "$dflt" in
-5.005) dflt=none ;;
-esac
-$cat <<EOM
+	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
 
-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.
+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.
 
-The default should almost always be sensible, so if you're not sure,
-just accept the default.
 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:
 
-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.
-
-If you want to, I can install the perl you are about to compile
-as /usr/bin/perl (in addition to $bin/perl).
 EOM
-	if test -f /usr/bin/perl; then
-	    $cat <<EOM
+	$sed 's/^/	/' libpath
+	cat <<EOM
 
-However, please note that because you already have a /usr/bin/perl,
-overwriting that with a new Perl would very probably cause problems.
-Therefore I'm assuming you don't want to do that (unless you insist).
+None of these seems to contain your C library. I need to get its name...
 
 EOM
-	    case "$installusrbinperl" in
-	    "$define"|[yY]*)	dflt='y';;
-	    *)			dflt='n';;
-	    esac
-	else
-	    $cat <<EOM
+fi
+fn=f
+rp='Where is your C library?'
+. ./getfile
+libc="$ans"
 
-Since you don't have a /usr/bin/perl I'm assuming creating one is okay.
+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
 
-EOM
-	    case "$installusrbinperl" in
-	    "$undef"|[nN]*)	dflt='n';;
-	    *)			dflt='y';;
-	    esac
-	fi
-	rp="Do you want to install perl as /usr/bin/perl?"
-	. ./myread
-	case "$ans" in
-	[yY]*)	val="$define";;
-	*)	val="$undef" ;;
+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'";\
+	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 $xrun
 else
-	val="$undef"
+	$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
-set installusrbinperl
-eval $setvar
+nm_extract="$com"
+case "$PASE" in
+define)
+    echo " "
+    echo "Since you are compiling for PASE, extracting more symbols from libc.a ...">&4
+    dump -Tv /lib/libc.a | awk '$7 == "/unix" {print $5 " " $8}' | grep "^SV" | awk '{print $2}' >> libc.list
+    ;;
+*)  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]*[ 	]*$/\1/p' /lib/syscalls.exp >>libc.list
+    fi
+    ;;
+esac
+;;
+esac
+$rm -f libnames libpath
+
+: see if dld is available
+set dld.h i_dld
+eval $inhdr
+
+: is a C symbol defined?
+csym='tlook=$1;
+case "$3" in
+-v) tf=libc.tmp; tdc="";;
+-a) tf=libc.tmp; tdc="[]";;
+*) tlook="^$1\$"; tf=libc.list; tdc="()";;
+esac;
+tx=yes;
+case "$reuseval-$4" in
+true-) ;;
+true-*) tx=no; eval "tval=\$$4"; case "$tval" in "") tx=yes;; esac;;
+esac;
+case "$tx" in
+yes)
+	tval=false;
+	if $test "$runnm" = true; then
+		if $contains $tlook $tf >/dev/null 2>&1; then
+			tval=true;
+		elif $test "$mistrustnm" = compile -o "$mistrustnm" = run; then
+			echo "void *(*(p()))$tdc { extern void *$1$tdc; return &$1; } int main() { if(p()) return(0); else return(1); }"> try.c;
+			$cc -o try $optimize $ccflags $ldflags try.c >/dev/null 2>&1 $libs && tval=true;
+			$test "$mistrustnm" = run -a -x try && { $run ./try$_exe >/dev/null 2>&1 || tval=false; };
+			$rm -f try$_exe try.c core core.* try.core;
+		fi;
+	else
+		echo "void *(*(p()))$tdc { extern void *$1$tdc; return &$1; } int main() { if(p()) return(0); else return(1); }"> try.c;
+		$cc -o try $optimize $ccflags $ldflags try.c $libs >/dev/null 2>&1 && tval=true;
+		$rm -f try$_exe try.c;
+	fi;
+	;;
+*)
+	case "$tval" in
+	$define) tval=true;;
+	*) tval=false;;
+	esac;
+	;;
+esac;
+eval "$2=$tval"'
 
-: see if dld is available
-set dld.h i_dld
-eval $inhdr
+: define an is-in-libc? function
+inlibc='echo " "; td=$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 dlopen exists
 xxx_runnm="$runnm"
@@ -7721,10 +7589,13 @@ while other systems (such as those using ELF) use $cc.
 
 EOM
 	case "$ld" in
-	'')	$cat >try.c <<'EOM'
+	'')	$cat >try.c <<EOM
 /* Test for whether ELF binaries are produced */
 #include <fcntl.h>
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
 #include <stdlib.h>
+#endif
 int main() {
 	char b[4];
 	int i = open("a.out",O_RDONLY);
@@ -7772,7 +7643,7 @@ EOM
 			      '') dflt="$dflt +vnocompatwarnings" ;;
 			      esac
 			      ;;	
-			linux|irix*)	dflt='-shared' ;;
+			linux|irix*|gnu*)	dflt='-shared' ;;
 			next)  dflt='none' ;;
 			solaris) dflt='-G' ;;
 			sunos) dflt='-assert nodefinitions' ;;
@@ -7819,11 +7690,9 @@ say "none".
 EOM
     case "$ccdlflags" in
     '') case "$osname" in
-		hpux)	dflt='-Wl,-E' ;;
-		linux)	dflt='-rdynamic' ;;
-		next)	dflt='none' ;;
-		sunos)	dflt='none' ;;
-		*)	dflt='none' ;;
+	    linux|hpux|gnu*)	dflt='-Wl,-E' ;;
+	    next|sunos)	dflt='none' ;;
+	    *)		dflt='none' ;;
 	    esac ;;
     ' ')  dflt='none' ;;
     *)  dflt="$ccdlflags" ;;
@@ -7918,7 +7787,7 @@ true)
 			dflt=libperl.5.$so
 			# XXX How handle the --version stuff for MAB?
 			;;
-		linux*)  # ld won't link with a bare -lperl otherwise.
+		linux*|gnu*)  # ld won't link with a bare -lperl otherwise.
 			dflt=libperl.$so
 			;;
 		cygwin*) # ld links against an importlib
@@ -8002,10 +7871,10 @@ if "$useshrplib"; then
 	solaris)
 		xxx="-R $shrpdir"
 		;;
-	freebsd|netbsd|openbsd)
+	freebsd|netbsd|openbsd|interix)
 		xxx="-Wl,-R$shrpdir"
 		;;
-	bsdos|linux|irix*|dec_osf)
+	bsdos|linux|irix*|dec_osf|gnu*)
 		xxx="-Wl,-rpath,$shrpdir"
 		;;
 	next)
@@ -8750,11 +8619,11 @@ else
 fi
 
 : determine where add-on html pages go
-: There is no standard location, so try to copy the previously-selected 
+: There is no standard location, so try to copy the previously-selected
 : directory structure for the core html pages.
-case "$sitehtml1" in
-'')	dflt=`echo "$html1dir" | $sed "s#^$prefix#$siteprefix#"` ;;
-*)	dflt=$sitehtml1 ;;
+case "$sitehtml1dir" in
+'')    dflt=`echo "$html1dir" | $sed "s#^$prefix#$siteprefix#"` ;;
+*)     dflt=$sitehtml1dir ;;
 esac
 case "$dflt" in
 ''|' ') dflt=none ;;
@@ -8762,23 +8631,21 @@ esac
 fn=dn+~
 rp='Pathname where the site-specific html pages should be installed?'
 . ./getfile
-sitehtml1="$ans"
-sitehtml1exp="$ansexp"
-: Use ' ' for none so value is preserved next time through Configure
-$test X"$sitehtml1" = "X" && sitehtml1=' '
+sitehtml1dir="$ans"
+sitehtml1direxp="$ansexp"
 : Change installation prefix, if necessary.
 if $test X"$prefix" != X"$installprefix"; then
-	installsitehtml1=`echo "$sitehtml1exp" | $sed "s#^$prefix#$installprefix#"`
+	installsitehtml1dir=`echo $sitehtml1direxp | $sed "s#^$prefix#$installprefix#"`
 else
-	installsitehtml1="$sitehtml1exp"
+	installsitehtml1dir="$sitehtml1direxp"
 fi
 
 : determine where add-on library html pages go
 : There is no standard location, so try to copy the previously-selected
 : directory structure for the core html pages.
-case "$sitehtml3" in
-'')	dflt=`echo "$html3dir" | $sed "s#^$prefix#$siteprefix#"` ;;
-*)	dflt=$sitehtml3 ;;
+case "$sitehtml3dir" in
+'')    dflt=`echo "$html3dir" | $sed "s#^$prefix#$siteprefix#"` ;;
+*)     dflt=$sitehtml3dir ;;
 esac
 case "$dflt" in
 ''|' ') dflt=none ;;
@@ -8786,21 +8653,19 @@ esac
 fn=dn+~
 rp='Pathname where the site-specific library html pages should be installed?'
 . ./getfile
-sitehtml3="$ans"
-sitehtml3exp="$ansexp"
-: Use ' ' for none so value is preserved next time through Configure
-$test X"$sitehtml3" = "X" && sitehtml3=' '
+sitehtml3dir="$ans"
+sitehtml3direxp="$ansexp"
 : Change installation prefix, if necessary.
 if $test X"$prefix" != X"$installprefix"; then
-	installsitehtml3=`echo "$sitehtml3exp" | $sed "s#^$prefix#$installprefix#"`
+	installsitehtml3dir=`echo $sitehtml3direxp | $sed "s#^$prefix#$installprefix#"`
 else
-	installsitehtml3="$sitehtml3exp"
+	installsitehtml3dir="$sitehtml3direxp"
 fi
 
 : determine where add-on manual pages go
-case "$siteman1" in
-'')	dflt=`echo "$man1dir" | $sed "s#^$prefix#$siteprefix#"` ;;
-*)	dflt=$siteman1 ;;
+case "$siteman1dir" in
+'')	dflt=`echo $man1dir | $sed "s#^$prefix#$siteprefix#"` ;;
+*)  	dflt=$siteman1dir ;;
 esac
 case "$dflt" in
 ''|' ') dflt=none ;;
@@ -8808,21 +8673,19 @@ esac
 fn=dn+~
 rp='Pathname where the site-specific manual pages should be installed?'
 . ./getfile
-siteman1="$ans"
-siteman1exp="$ansexp"
-: Use ' ' for none so value is preserved next time through Configure
-$test X"$siteman1" = "X" && siteman1=' '
+siteman1dir="$ans"
+siteman1direxp="$ansexp"
 : Change installation prefix, if necessary.
 if $test X"$prefix" != X"$installprefix"; then
-	installsiteman1=`echo "$siteman1exp" | $sed "s#^$prefix#$installprefix#"`
+	installsiteman1dir=`echo $siteman1direxp | $sed "s#^$prefix#$installprefix#"`
 else
-	installsiteman1="$siteman1exp"
+	installsiteman1dir="$siteman1direxp"
 fi
 
 : determine where add-on library man pages go
-case "$siteman3" in
-'')	dflt=`echo "$man3dir" | $sed "s#^$prefix#$siteprefix#"` ;;
-*)	dflt=$siteman3 ;;
+case "$siteman3dir" in
+'')	dflt=`echo $man3dir | $sed "s#^$prefix#$siteprefix#"` ;;
+*)  	dflt=$siteman3dir ;;
 esac
 case "$dflt" in
 ''|' ') dflt=none ;;
@@ -8830,15 +8693,13 @@ esac
 fn=dn+~
 rp='Pathname where the site-specific library manual pages should be installed?'
 . ./getfile
-siteman3="$ans"
-siteman3exp="$ansexp"
-: Use ' ' for none so value is preserved next time through Configure
-$test X"$siteman3" = "X" && siteman3=' '
+siteman3dir="$ans"
+siteman3direxp="$ansexp"
 : Change installation prefix, if necessary.
 if $test X"$prefix" != X"$installprefix"; then
-	installsiteman3=`echo "$siteman3exp" | $sed "s#^$prefix#$installprefix#"`
+	installsiteman3dir=`echo $siteman3direxp | $sed "s#^$prefix#$installprefix#"`
 else
-	installsiteman3="$siteman3exp"
+	installsiteman3dir="$siteman3direxp"
 fi
 
 : determine where add-on public executable scripts go
@@ -8859,6 +8720,36 @@ else
 	installsitescript="$sitescriptexp"
 fi
 
+case "$usefaststdio" in
+$define|true|[yY]*|'')
+	xversion=`awk '/define[ 	]+PERL_VERSION/ {print $3}' $rsrc/patchlevel.h`
+	case "$xversion" in
+	[68])	dflt='y' ;;
+	*)	dflt='n' ;;
+	esac
+	;;
+*) dflt='n';;
+esac
+cat <<EOM
+
+Perl can be built to use 'fast stdio', which means using the stdio
+library but also directly manipulating the stdio buffers to enable
+faster I/O.  Using stdio is better for backward compatibility (especially
+for Perl extensions), but on the other hand since Perl 5.8 the 'perlio'
+interface has been preferred instead of stdio.
+
+If this doesn't make any sense to you, just accept the default '$dflt'.
+EOM
+rp='Use the "fast stdio" if available?'
+. ./myread
+case "$ans" in
+y|Y)	val="$define" ;;     
+*)      val="$undef" ;;
+esac
+set usefaststdio
+eval $setvar
+
+
 : define an is-a-typedef? function
 typedef='type=$1; var=$2; def=$3; shift; shift; shift; inclist=$@;
 case "$inclist" in
@@ -8988,8 +8879,6 @@ else
 	fpossize="$ans"
 fi
 
-
-
 # Backward compatibility (uselfs is deprecated).
 case "$uselfs" in
 "$define"|true|[yY]*)
@@ -9028,14 +8917,16 @@ EOM
 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 $test -f uselargefiles.cbu; then
+	echo "Your platform has some specific hints regarding large file builds, using them..."
+	. ./uselargefiles.cbu
+fi
+case "$uselargefiles" in
+"$define")
 	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
@@ -9067,6 +8958,10 @@ EOCP
 		$cat > try.c <<EOCP
 #include <sys/types.h>
 #include <stdio.h>
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
 int main() {
     printf("%d\n", (int)sizeof($fpostype));
     return(0);
@@ -9097,6 +8992,11 @@ EOCP
 	;;
 esac
 
+# probably will refer to
+#   $archlib $privlib $sitearch $sitelib $vendorarch $vendorlib
+need_relocation=0
+userelocatableinc=undef
+
 case "$vendorprefix" in
 '')	d_vendorbin="$undef"
 	vendorbin=''
@@ -9123,16 +9023,16 @@ else
 fi
 
 case "$vendorprefix" in
-'')	vendorhtml1=''
-	vendorhtml1exp=''
+'')	vendorhtml1dir=''
+	vendorhtml1direxp=''
 	;;
 *)	: determine where vendor-supplied html pages go.
 	: There is no standard location, so try to copy the previously-selected
 	: directory structure for the core html pages.
 	: XXX Better default suggestions would be welcome.
-	case "$vendorhtml1" in
+	case "$vendorhtml1dir" in
 	'')	dflt=`echo "$html1dir" | $sed "s#^$prefix#$vendorprefix#"` ;;
-	*)	dflt=$vendorhtml1 ;;
+	*)	dflt=$vendorhtml1dir ;;
 	esac
 	case "$dflt" in
 	''|' ') dflt=none ;;
@@ -9140,30 +9040,30 @@ case "$vendorprefix" in
 	fn=dn+~
 	rp='Pathname for the vendor-supplied html pages?'
 	. ./getfile
-	vendorhtml1="$ans"
-	vendorhtml1exp="$ansexp"
+	vendorhtml1dir="$ans"
+	vendorhtml1direxp="$ansexp"
 	;;
 esac
 : Use ' ' for none so value is preserved next time through Configure
-$test X"$vendorhtml1" = "X" && vendorhtml1=' '
+$test X"$vendorhtml1dir" = "X" && vendorhtml1dir=' '
 : Change installation prefix, if necessary.
 if $test X"$prefix" != X"$installprefix"; then
-	installvendorhtml1=`echo $vendorhtml1exp | $sed "s#^$prefix#$installprefix#"`
+	installvendorhtml1dir=`echo $vendorhtml1direxp | $sed "s#^$prefix#$installprefix#"`
 else
-	installvendorhtml1="$vendorhtml1exp"
+	installvendorhtml1dir="$vendorhtml1direxp"
 fi
 
 case "$vendorprefix" in
-'')	vendorhtml3=''
-	vendorhtml3exp=''
+'')	vendorhtml3dir=''
+	vendorhtml3direxp=''
 	;;
 *)	: determine where vendor-supplied module html pages go.
 	: There is no standard location, so try to copy the previously-selected
 	: directory structure for the core html pages.
 	: XXX Better default suggestions would be welcome.
-	case "$vendorhtml3" in
+	case "$vendorhtml3dir" in
 	'')	dflt=`echo "$html3dir" | $sed "s#^$prefix#$vendorprefix#"` ;;
-	*)	dflt=$vendorhtml3 ;;
+	*)	dflt=$vendorhtml3dir ;;
 	esac
 	case "$dflt" in
 	''|' ') dflt=none ;;
@@ -9171,27 +9071,27 @@ case "$vendorprefix" in
 	fn=dn+~
 	rp='Pathname for the vendor-supplied html pages?'
 	. ./getfile
-	vendorhtml3="$ans"
-	vendorhtml3exp="$ansexp"
+	vendorhtml3dir="$ans"
+	vendorhtml3direxp="$ansexp"
 	;;
 esac
 : Use ' ' for none so value is preserved next time through Configure
-$test X"$vendorhtml3" = "X" && vendorhtml3=' '
+$test X"$vendorhtml3dir" = "X" && vendorhtml3dir=' '
 : Change installation prefix, if necessary.
 if $test X"$prefix" != X"$installprefix"; then
-	installvendorhtml3=`echo $vendorhtml3exp | $sed "s#^$prefix#$installprefix#"`
+	installvendorhtml3dir=`echo $vendorhtml3direxp | $sed "s#^$prefix#$installprefix#"`
 else
-	installvendorhtml3="$vendorhtml3exp"
+	installvendorhtml3dir="$vendorhtml3direxp"
 fi
 
 case "$vendorprefix" in
-'')	vendorman1=''
-	vendorman1exp=''
+'')	vendorman1dir=''
+	vendorman1direxp=''
 	;;
 *)	: determine where vendor-supplied manual pages go.
-	case "$vendorman1" in
+	case "$vendorman1dir" in
 	'') dflt=`echo "$man1dir" | $sed "s#^$prefix#$vendorprefix#"` ;;
-	*)	dflt=$vendorman1 ;;
+	*)	dflt=$vendorman1dir ;;
 	esac
 	case "$dflt" in
 	''|' ') dflt=none ;;
@@ -9199,27 +9099,27 @@ case "$vendorprefix" in
 	fn=nd~+
 	rp='Pathname for the vendor-supplied manual section 1 pages?'
 	. ./getfile
-	vendorman1="$ans"
-	vendorman1exp="$ansexp"
+	vendorman1dir="$ans"
+	vendorman1direxp="$ansexp"
 	;;
 esac
 : Use ' ' for none so value is preserved next time through Configure
-$test X"$vendorman1" = "X" && vendorman1=' '
+$test X"$vendorman1dir" = "X" && vendorman1dir=' '
 : Change installation prefix, if necessary.
 if $test X"$prefix" != X"$installprefix"; then
-	installvendorman1=`echo "$vendorman1exp" | $sed "s#^$prefix#$installprefix#"`
+	installvendorman1dir=`echo "$vendorman1direxp" | $sed "s#^$prefix#$installprefix#"`
 else
-	installvendorman1="$vendorman1exp"
+	installvendorman1dir="$vendorman1direxp"
 fi
 
 case "$vendorprefix" in
-'')	vendorman3=''
-	vendorman3exp=''
+'')	vendorman3dir=''
+	vendorman3direxp=''
 	;;
 *)	: determine where vendor-supplied module manual pages go.
-	case "$vendorman3" in
+	case "$vendorman3dir" in
 	'') dflt=`echo "$man3dir" | $sed "s#^$prefix#$vendorprefix#"` ;;
-	*)	dflt=$vendorman3 ;;
+	*)	dflt=$vendorman3dir ;;
 	esac
 	case "$dflt" in
 	''|' ') dflt=none ;;
@@ -9227,17 +9127,17 @@ case "$vendorprefix" in
 	fn=nd~+
 	rp='Pathname for the vendor-supplied manual section 3 pages?'
 	. ./getfile
-	vendorman3="$ans"
-	vendorman3exp="$ansexp"
+	vendorman3dir="$ans"
+	vendorman3direxp="$ansexp"
 	;;
 esac
 : Use ' ' for none so value is preserved next time through Configure
-$test X"$vendorman3" = "X" && vendorman3=' '
+$test X"$vendorman3dir" = "X" && vendorman3dir=' '
 : Change installation prefix, if necessary.
 if $test X"$prefix" != X"$installprefix"; then
-	installvendorman3=`echo "$vendorman3exp" | $sed "s#^$prefix#$installprefix#"`
+	installvendorman3dir=`echo "$vendorman3direxp" | $sed "s#^$prefix#$installprefix#"`
 else
-	installvendorman3="$vendorman3exp"
+	installvendorman3dir="$vendorman3direxp"
 fi
 
 case "$vendorprefix" in
@@ -9276,6 +9176,121 @@ fi
 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 $compile; then
+		yyy=`$run ./try`
+		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("%.3Lf\n", d);
+}
+EOCP
+	set try
+	if eval $compile; then
+		yyy=`$run ./try`
+		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("%.3llf\n", d);
+}
+EOCP
+	set try
+	if eval $compile; then
+		yyy=`$run ./try`
+		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 $compile; then
+		yyy=`$run ./try`
+		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.
 
 if test "X$d_Gconvert" = X; then
@@ -9529,7 +9544,7 @@ eval $inlibc
 case "$d_access" in
 "$define")
 	echo " "
-	$cat >access.c <<'EOCP'
+	$cat >access.c <<EOCP
 #include <sys/types.h>
 #ifdef I_FCNTL
 #include <fcntl.h>
@@ -9540,6 +9555,10 @@ case "$d_access" in
 #ifdef I_UNISTD
 #include <unistd.h>
 #endif
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
 int main() {
 	exit(R_OK);
 }
@@ -9567,6 +9586,10 @@ $rm -f access*
 set accessx d_accessx
 eval $inlibc
 
+: see if aintl exists
+set aintl d_aintl
+eval $inlibc
+
 : see if alarm exists
 set alarm d_alarm
 eval $inlibc
@@ -9627,6 +9650,25 @@ EOSH
 chmod +x protochk
 $eunicefix protochk
 
+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 sys/types.h has to be included
 set sys/types.h i_systypes
 eval $inhdr
@@ -9658,7 +9700,7 @@ echo " "
 if test "X$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'
+	$cat >try.c <<EOCP
 #include <sys/types.h>
 #ifdef I_TIME
 #include <time.h>
@@ -9672,6 +9714,10 @@ if test "X$timeincl" = X; then
 #ifdef I_SYSSELECT
 #include <sys/select.h>
 #endif
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
 int main()
 {
 	struct tm foo;
@@ -9833,11 +9879,13 @@ set atoll d_atoll
 eval $inlibc
 
 : Look for GNU-cc style attribute checking
+case "$d_attribut" in
+'')
 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));
+void croak (char* pat,...) __attribute__((__format__(__printf__,1,2),noreturn));
 EOCP
 if $cc $ccflags -c attrib.c >attrib.out 2>&1 ; then
 	if $contains 'warning' attrib.out >/dev/null 2>&1; then
@@ -9851,6 +9899,9 @@ else
 	echo "Your C compiler doesn't seem to understand __attribute__ at all."
 	val="$undef"
 fi
+;;
+*) val="$d_attribut" ;;
+esac
 set d_attribut
 eval $setvar
 $rm -f attrib*
@@ -9881,6 +9932,10 @@ case "$d_getpgrp" in
 #ifdef I_UNISTD
 #  include <unistd.h>
 #endif
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
 int main()
 {
 	if (getuid() == 0) {
@@ -9943,6 +9998,10 @@ case "$d_setpgrp" in
 #ifdef I_UNISTD
 #  include <unistd.h>
 #endif
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
 int main()
 {
 	if (getuid() == 0) {
@@ -10072,7 +10131,7 @@ int main()
 	i32  = ($xxx) g;
 
 	/* x86 processors will probably give 0x8000 0000, which is a
-       sign change.  We don't want that.  We want to mimic SPARC
+	   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.
 	*/
@@ -10206,8 +10265,12 @@ echo " "
 if set vprintf val -f d_vprintf; eval $csym; $val; then
 	echo 'vprintf() found.' >&4
 	val="$define"
-	$cat >try.c <<'EOF'
+	$cat >try.c <<EOF
 #include <varargs.h>
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
 
 int main() { xxx("foo"); }
 
@@ -10394,6 +10457,10 @@ fi
 set d_const
 eval $setvar
 
+: see if copysignl exists
+set copysignl d_copysignl
+eval $inlibc
+
 : see if crypt exists
 echo " "
 set crypt d_crypt
@@ -10746,6 +10813,10 @@ eval $inhdr
 echo " "
 $cat >dirfd.c <<EOM
 #include <stdio.h>
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
 #$i_dirent I_DIRENT		/**/
 #$i_sysdir I_SYS_DIR		/**/
 #$i_sysndir I_SYS_NDIR		/**/
@@ -10838,6 +10909,10 @@ EOM
 $cat >fred.c<<EOM
 
 #include <stdio.h>
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
 #$i_dlfcn I_DLFCN
 #ifdef I_DLFCN
 #include <dlfcn.h>      /* the dynamic linker include file for SunOS/Solaris */
@@ -11375,7 +11450,7 @@ esac
 
 : Locate the flags for 'open()'
 echo " "
-$cat >try.c <<'EOCP'
+$cat >try.c <<EOCP
 #include <sys/types.h>
 #ifdef I_FCNTL
 #include <fcntl.h>
@@ -11383,6 +11458,10 @@ $cat >try.c <<'EOCP'
 #ifdef I_SYS_FILE
 #include <sys/file.h>
 #endif
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
 int main() {
 	if(O_RDONLY);
 #ifdef O_TRUNC
@@ -11515,7 +11594,10 @@ case "$o_nonblock" in
 	$cat head.c > try.c
 	$cat >>try.c <<EOCP
 #include <stdio.h>
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
 #include <stdlib.h>
+#endif
 #$i_fcntl I_FCNTL
 #ifdef I_FCNTL
 #include <fcntl.h>
@@ -11561,7 +11643,10 @@ case "$eagain" in
 #include <sys/types.h>
 #include <signal.h>
 #include <stdio.h> 
-#include <stdlib.h> 
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
 #$i_fcntl I_FCNTL
 #ifdef I_FCNTL
 #include <fcntl.h>
@@ -11630,77 +11715,362 @@ int main()
 		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! */
+	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 "$run ./try >try.out 2>try.ret 4>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!";;
+		4) echo "Could not find F_SETFL!";;
+		*) 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 _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>
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
+#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 && $to try.c; then
+	if $run ./try; then
+		echo "Your stdio acts pretty std."
+		val="$define"
+	else
+		echo "Your stdio isn't very std."
+	fi
+else
+	echo "Your stdio doesn't appear very std."
+fi
+$rm -f try.c try
+
+# glibc 2.2.90 and above apparently change stdio streams so Perl's
+# direct buffer manipulation no longer works.  The Configure tests
+# should be changed to correctly detect this, but until then,
+# the following check should at least let perl compile and run.
+# (This quick fix should be updated before 5.8.1.)
+# To be defensive, reject all unknown versions, and all versions  > 2.2.9.
+# A. Dougherty, June 3, 2002.
+case "$d_gnulibc" in
+$define)
+	case "$gnulibc_version" in
+	2.[01]*)  ;;
+	2.2) ;;
+	2.2.[0-9]) ;;
+	*)  echo "But I will not snoop inside glibc $gnulibc_version stdio buffers."
+		val="$undef"
+		;;
+	esac
+	;;
+esac
+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. */
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
+#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;
+
 }
-EOCP
+EOP
 	set try
-	if eval $compile_ok; then
-		echo "$startsh" >mtry
-		echo "$run ./try >try.out 2>try.ret 4>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!";;
-		4) echo "Could not find F_SETFL!";;
-		*) 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
-			;;
+	if eval $compile && $to try.c; then
+ 		case `$run ./try` 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 "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"
+			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)
+	$cat >try.c <<EOP
+#include <stdio.h>
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
+#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 && $to try.c; then
+		if $run ./try; then
+			echo "And its _base field acts std."
+			val="$define"
+		else
+			echo "But its _base field isn't std."
 		fi
 	else
-		echo "I can't compile the test program--assuming errno EAGAIN will do."
-		eagain=EAGAIN
+		echo "However, it seems to be lacking the _base field."
 	fi
-	set d_eofnblk
-	eval $setvar
+	$rm -f try.c try
 	;;
-*)
-	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
+set d_stdiobase
+eval $setvar
+
+: see if fast_stdio exists
+val="$undef"
+case "$d_stdstdio:$d_stdio_ptr_lval" in
+"$define:$define")
+	case "$d_stdio_cnt_lval$d_stdio_ptr_lval_sets_cnt" in
+	*$define*)
+		echo "You seem to have 'fast stdio' to directly manipulate the stdio buffers." >& 4
+		val="$define"
 		;;
 	esac
 	;;
 esac
-$rm -f try try.* .out core head.c mtry
+set d_faststdio
+eval $setvar
+
+
 
 : see if fchdir exists
 set fchdir d_fchdir
@@ -11721,7 +12091,10 @@ eval $inlibc
 echo " "
 : See if fcntl-based locking works.
 $cat >try.c <<EOCP
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
 #include <stdlib.h>
+#endif
 #include <unistd.h>
 #include <fcntl.h>
 #include <signal.h>
@@ -11788,6 +12161,10 @@ $cat <<EOM
 Checking to see how well your C compiler handles fd_set and friends ...
 EOM
 $cat >try.c <<EOCP
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
 #$i_systime I_SYS_TIME
 #$i_sysselct I_SYS_SELECT
 #$d_socket HAS_SOCKET
@@ -13437,6 +13814,10 @@ esac
 set d_htonl
 eval $setvar
 
+: see if ilogbl exists
+set ilogbl d_ilogbl
+eval $inlibc
+
 : index or strchr
 echo " "
 if set index val -f; eval $csym; $val; then
@@ -13476,9 +13857,13 @@ eval $inlibc
 
 : Look for isascii
 echo " "
-$cat >isascii.c <<'EOCP'
+$cat >isascii.c <<EOCP
 #include <stdio.h>
 #include <ctype.h>
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
 int main() {
 	int c = 'A';
 	if (isascii(c))
@@ -13578,6 +13963,38 @@ $rm -f ldbl_dig.?
 set d_ldbl_dig
 eval $setvar
 
+: see if this is a math.h system
+set math.h i_math
+eval $inhdr
+
+d_libm_lib_version="$undef"
+case $i_math in
+    $define)
+	: check to see if math.h defines _LIB_VERSION
+	echo " "
+	echo "Checking to see if your libm supports _LIB_VERSION..." >&4
+	$cat >try.c <<EOCP
+#include <unistd.h>
+#include <math.h>
+int main (int argc, char *argv[])
+{
+    printf ("%d\n", _LIB_VERSION);
+    return (0);
+    } /* main */
+EOCP
+	set try
+	if eval $compile; then
+	    foo=`$run ./try`
+	    echo "Yes, it does ($foo)" >&4
+	    d_libm_lib_version="$define"
+	else
+	    echo "No, it does not (probably harmless)\n" >&4
+	    fi
+	$rm -f try.* try core core.try.*
+	;;
+
+    esac
+
 : see if link exists
 set link d_link
 eval $inlibc
@@ -13723,13 +14140,128 @@ END
 	if $cc $ccflags -c mmap.c >/dev/null 2>&1; then
 		mmaptype='void *'
 	else
-		mmaptype='caddr_t'
+		mmaptype='caddr_t'
+	fi
+	echo "and it returns ($mmaptype)." >&4
+	;;
+esac
+
+
+
+: see if sqrtl exists
+set sqrtl d_sqrtl
+eval $inlibc
+
+: see if scalbnl exists
+set scalbnl d_scalbnl
+eval $inlibc
+
+: see if modfl exists
+set modfl d_modfl
+eval $inlibc
+
+: see if prototype for modfl is available
+echo " "
+set d_modflproto modfl $i_math math.h
+eval $hasproto
+
+d_modfl_pow32_bug="$undef"
+
+case "$d_longdbl$d_modfl" in
+$define$define)
+	$cat <<EOM
+Checking to see whether your modfl() is okay for large values...
+EOM
+$cat >try.c <<EOCP
+#include <math.h> 
+#include <stdio.h>
+EOCP
+if $test "X$d_modflproto" != "X$define"; then
+	$cat >>try.c <<EOCP
+/* Sigh. many current glibcs provide the function, but do not prototype it.  */ 
+long double modfl (long double, long double *);
+EOCP
+fi
+$cat >>try.c <<EOCP
+int main() {
+    long double nv = 4294967303.15;
+    long double v, w;
+    v = modfl(nv, &w);         
+#ifdef __GLIBC__
+    printf("glibc");
+#endif
+    printf(" %"$sPRIfldbl" %"$sPRIfldbl" %"$sPRIfldbl"\n", nv, v, w);
+    return 0;
+}
+EOCP
+	case "$osname:$gccversion" in
+	aix:)	saveccflags="$ccflags"
+		ccflags="$ccflags -qlongdouble" ;; # to avoid core dump
+	esac
+	set try
+	if eval $compile; then
+		foo=`$run ./try`
+		case "$foo" in
+		*" 4294967303.150000 1.150000 4294967302.000000")
+			echo >&4 "Your modfl() is broken for large values."
+			d_modfl_pow32_bug="$define"
+			case "$foo" in
+			glibc)	echo >&4 "You should upgrade your glibc to at least 2.2.2 to get a fixed modfl()."
+			;;
+			esac
+			;;
+		*" 4294967303.150000 0.150000 4294967303.000000")
+			echo >&4 "Your modfl() seems okay for large values."
+			;;
+		*)	echo >&4 "I don't understand your modfl() at all."
+			d_modfl="$undef"
+			;;
+		esac
+		$rm -f try.* try core core.try.*
+	else
+		echo "I cannot figure out whether your modfl() is okay, assuming it isn't."
+		d_modfl="$undef"
 	fi
-	echo "and it returns ($mmaptype)." >&4
+	case "$osname:$gccversion" in
+	aix:)	ccflags="$saveccflags" ;; # restore
+	esac
 	;;
 esac
 
+if $test "$uselongdouble" = "$define"; then
+    message=""
+    if $test "$d_sqrtl" != "$define"; then
+	message="$message sqrtl"
+    fi
+    if $test "$d_modfl" != "$define"; then
+	if $test "$d_aintl:$d_copysignl" = "$define:$define"; then
+	    echo "You have both aintl and copysignl, so I can emulate modfl."
+	else
+	    message="$message modfl"
+	fi
+    fi
+    if $test "$d_frexpl" != "$define"; then
+	if $test "$d_ilogbl:$d_scalbnl" = "$define:$define"; then
+	    echo "You have both ilogbl and scalbnl, so I can emulate frexpl."
+	else
+	    message="$message frexpl"
+	fi
+    fi
+
+    if $test "$message" != ""; then
+	$cat <<EOM >&4
+
+*** You requested the use of long doubles but you do not seem to have
+*** the following mathematical functions needed for long double support:
+***    $message
+*** Please rerun Configure without -Duselongdouble and/or -Dusemorebits.
+*** Cannot continue, aborting.
+
+EOM
 
+	exit 1
+    fi
+fi
 
 : see if mprotect exists
 set mprotect d_mprotect
@@ -13806,10 +14338,6 @@ eval $inlibc
 set munmap d_munmap
 eval $inlibc
 
-: see if nanosleep exists
-set nanosleep d_nanosleep
-eval $inlibc
-
 : see if nice exists
 set nice d_nice
 eval $inlibc
@@ -14072,6 +14600,10 @@ if test X"$d_volatile" = X"$define"; then
 fi
 $cat <<EOP >try.c
 #include <stdio.h>
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
 #include <sys/types.h>
 #include <signal.h>
 #ifdef SIGFPE
@@ -14278,6 +14810,10 @@ esac
 set d_pthread_atfork
 eval $setvar
 
+: see if pthread_attr_setscope exists
+set pthread_attr_setscope d_pthread_attr_setscope
+eval $inlibc
+
 
 : see whether the various POSIXish _yields exist
 $cat >try.c <<EOP
@@ -14816,14 +15352,13 @@ else
     echo "You do not have union semun in <sys/sem.h>." >&4
     val="$undef"
 fi
-$rm -f try try.c try.h
+$rm -f try try.c
 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
@@ -14849,8 +15384,11 @@ $define)
 #   define S_IRWXO (S_IROTH|S_IWOTH|S_IXOTH)
 #endif
 END
-
-    $cat > try.c <<END
+    : see whether semctl IPC_STAT can use union semun
+    val="$undef"
+    case "$d_semctl_semun" in
+    '')
+      $cat > try.c <<END
 #include <sys/types.h>
 #include <sys/ipc.h>
 #include <sys/sem.h>
@@ -14896,15 +15434,16 @@ int main() {
   return 0;
 }
 END
-    val="$undef"
-    set try
-    if eval $compile; then
-	xxx=`$run ./try`
-        case "$xxx" in
-        semun) val="$define" ;;
-        esac
-    fi
-    $rm -f try try.c
+      set try
+      if eval $compile; then
+	  xxx=`$run ./try`
+          case "$xxx" in
+          semun) val="$define" ;;
+          esac
+      fi
+      $rm -f try try.c
+      ;;
+    esac
     set d_semctl_semun
     eval $setvar
     case "$d_semctl_semun" in
@@ -14918,7 +15457,10 @@ END
     esac
 
     : see whether semctl IPC_STAT can use struct semid_ds pointer
-    $cat > try.c <<'END'
+    val="$undef"
+    case "$d_semctl_semid_ds" in
+    '')
+      $cat > try.c <<'END'
 #include <sys/types.h>
 #include <sys/ipc.h>
 #include <sys/sem.h>
@@ -14954,15 +15496,16 @@ int main() {
     return 0;
 }
 END
-    val="$undef"
-    set try
-    if eval $compile; then
-        xxx=`$run ./try`
-        case "$xxx" in
-        semid_ds) val="$define" ;;
-        esac
-    fi
-    $rm -f try try.c
+      set try
+      if eval $compile; then
+          xxx=`$run ./try`
+          case "$xxx" in
+          semid_ds) val="$define" ;;
+          esac
+      fi
+      $rm -f try try.c
+      ;;
+    esac
     set d_semctl_semid_ds
     eval $setvar
     case "$d_semctl_semid_ds" in
@@ -15705,348 +16248,92 @@ case "$d_srandom_r" in
 	case "$d_srandom_r_proto" in
 	define)
 	case "$srandom_r_proto" in
-	''|0) try='int srandom_r(unsigned int, struct random_data*);'
-	./protochk "extern $try" $hdrs && srandom_r_proto=I_TS ;;
-	esac
-	case "$srandom_r_proto" in
-	''|0)	d_srandom_r=undef
- 	        srandom_r_proto=0
-		echo "Disabling srandom_r, cannot determine prototype." >&4 ;;
-	* )	case "$srandom_r_proto" in
-		REENTRANT_PROTO*) ;;
-		*) srandom_r_proto="REENTRANT_PROTO_$srandom_r_proto" ;;
-		esac
-		echo "Prototype: $try" ;;
-	esac
-	;;
-	*)	case "$usethreads" in
-		define) echo "srandom_r has no prototype, not using it." >&4 ;;
-		esac
-		d_srandom_r=undef
-		srandom_r_proto=0
-		;;
-	esac
-	;;
-*)	srandom_r_proto=0
-	;;
-esac
-
-: see if prototype for setresgid is available
-echo " "
-set d_sresgproto setresgid $i_unistd unistd.h
-eval $hasproto
-
-: see if prototype for setresuid is available
-echo " "
-set d_sresuproto setresuid $i_unistd unistd.h
-eval $hasproto
-
-: 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 && $to try.c; then
-	if $run ./try; then
-		echo "Your stdio acts pretty std."
-		val="$define"
-	else
-		echo "Your stdio isn't very std."
-	fi
-else
-	echo "Your stdio doesn't appear very std."
-fi
-$rm -f try.c try
-
-# glibc 2.2.90 and above apparently change stdio streams so Perl's
-# direct buffer manipulation no longer works.  The Configure tests
-# should be changed to correctly detect this, but until then,
-# the following check should at least let perl compile and run.
-# (This quick fix should be updated before 5.8.1.)
-# To be defensive, reject all unknown versions, and all versions  > 2.2.9.
-# A. Dougherty, June 3, 2002.
-case "$d_gnulibc" in
-$define)
-	case "$gnulibc_version" in
-	2.[01]*)  ;;
-	2.2) ;;
-	2.2.[0-9]) ;;
-	*)  echo "But I will not snoop inside glibc $gnulibc_version stdio buffers."
-		val="$undef"
+	''|0) try='int srandom_r(unsigned int, struct random_data*);'
+	./protochk "extern $try" $hdrs && srandom_r_proto=I_TS ;;
+	esac
+	case "$srandom_r_proto" in
+	''|0)	d_srandom_r=undef
+ 	        srandom_r_proto=0
+		echo "Disabling srandom_r, cannot determine prototype." >&4 ;;
+	* )	case "$srandom_r_proto" in
+		REENTRANT_PROTO*) ;;
+		*) srandom_r_proto="REENTRANT_PROTO_$srandom_r_proto" ;;
+		esac
+		echo "Prototype: $try" ;;
+	esac
+	;;
+	*)	case "$usethreads" in
+		define) echo "srandom_r has no prototype, not using it." >&4 ;;
+		esac
+		d_srandom_r=undef
+		srandom_r_proto=0
 		;;
 	esac
 	;;
+*)	srandom_r_proto=0
+	;;
 esac
-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
+: see if prototype for setresgid is available
+echo " "
+set d_sresgproto setresgid $i_unistd unistd.h
+eval $hasproto
 
-: 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
+: see if prototype for setresuid is available
+echo " "
+set d_sresuproto setresuid $i_unistd unistd.h
+eval $hasproto
 
+: see if sys/stat.h is available
+set sys/stat.h i_sysstat
+eval $inhdr
 
-: 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;
+: 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
 
-	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 && $to try.c; then
- 		case `$run ./try` 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
-	;;
+: 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 _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 && $to try.c; then
-		if $run ./try; then
-			echo "And its _base field acts std."
-			val="$define"
-		else
-			echo "But its _base field isn't std."
-		fi
-	else
-		echo "However, it seems to be lacking the _base field."
-	fi
-	$rm -f try.c try
+
+
+: see if struct statfs knows about f_flags
+case "$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
-set d_stdiobase
-eval $setvar
+case "$d_statfs_f_flags" in
+"$define")      echo "Yes, it does."   ;;
+*)              echo "No, it doesn't." ;;
+esac
 
 $cat >&4 <<EOM
 Checking how to access stdio streams by file descriptor number...
@@ -16203,6 +16490,14 @@ esac
 set strftime d_strftime
 eval $inlibc
 
+: see if strlcat exists
+set strlcat d_strlcat
+eval $inlibc
+
+: see if strlcpy exists
+set strlcpy d_strlcpy
+eval $inlibc
+
 : see if strtod exists
 set strtod d_strtod
 eval $inlibc
@@ -16677,6 +16972,10 @@ I'm now running the test program...
 EOM
 		$cat >try.c <<EOCP
 #include <stdio.h>
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
 #include <sys/types.h>
 typedef $uvtype UV;
 int main()
@@ -16771,10 +17070,10 @@ int main() {
     buf[1] = 0;
     buf[2] = 0;
     buf[3] = 1;
+    buf[4] = 0;
     buf[5] = 0;
     buf[6] = 0;
-    buf[7] = 0;
-    buf[8] = 1;
+    buf[7] = 1;
 
     for (i = 0; i < 4; i++) {
 	up = (U32*)(buf + i);
@@ -17050,9 +17349,9 @@ esac
 : set the base revision
 baserev=5.0
 
-: how do we catenate cpp tokens here?
+: how do we concatenate cpp tokens here?
 echo " "
-echo "Checking to see how your cpp does stuff like catenate tokens..." >&4
+echo "Checking to see how your cpp does stuff like concatenate tokens..." >&4
 $cat >cpp_stuff.c <<'EOCP'
 #define RCAT(a,b)a/**/b
 #define ACAT(a,b)a ## b
@@ -17071,8 +17370,8 @@ elif $contains 'Reiser' cpp_stuff.out >/dev/null 2>&1; then
 	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...
+Hmm, I don't seem to be able to concatenate 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
@@ -17094,6 +17393,10 @@ $define)
 #endif
 #include <sys/types.h>
 #include <stdio.h>
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
 #include <db.h>
 int main(int argc, char *argv[])
 {
@@ -17432,6 +17735,10 @@ sunos) $echo '#define PERL_FFLUSH_ALL_FOPEN_MAX 32' > try.c ;;
 esac
 $cat >>try.c <<EOCP
 #include <stdio.h>
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
 #$i_unistd I_UNISTD
 #ifdef I_UNISTD
 # include <unistd.h>
@@ -18451,18 +18758,16 @@ 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.
-xs_apiversion=$version # The current site_perl version.
-: Find earliest pure perl site_perl subdirectory perl can use.
-: The versioned directories started at 5.005.
-pm_apiversion='5.005'
-
 : see if ar generates random libraries by itself
 echo " "
 echo "Checking how to generate random libraries on your machine..." >&4
 echo 'int bar1() { return bar2(); }' > bar1.c
 echo 'int bar2() { return 2; }' > bar2.c
-$cat > foo.c <<'EOP'
+$cat > foo.c <<EOP
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
 int main() { printf("%d\n", bar1()); exit(0); }
 EOP
 $cc $ccflags -c bar1.c >/dev/null 2>&1
@@ -18552,7 +18857,8 @@ esac
 
 : check for the select 'width'
 case "$selectminbits" in
-'') case "$d_select" in
+'') safebits=`expr $ptrsize \* 8`
+    case "$d_select" in
 	$define)
 		$cat <<EOM
 
@@ -18594,19 +18900,21 @@ $selecttype b;
 #define NBYTES (S * 8 > MINBITS ? S : MINBITS/8)
 #define NBITS  (NBYTES * 8)
 int main() {
-    char s[NBYTES];
+    char *s = malloc(NBYTES);
     struct timeval t;
     int i;
     FILE* fp;
     int fd;
 
+    if (!s)
+	exit(1);
     fclose(stdin);
     fp = fopen("try.c", "r");
     if (fp == 0)
-      exit(1);
+      exit(2);
     fd = fileno(fp);
     if (fd < 0)
-      exit(2);
+      exit(3);
     b = ($selecttype)s;
     for (i = 0; i < NBITS; i++)
 	FD_SET(i, b);
@@ -18614,6 +18922,7 @@ int main() {
     t.tv_usec = 0;
     select(fd + 1, b, 0, 0, &t);
     for (i = NBITS - 1; i > fd && FD_ISSET(i, b); i--);
+    free(s);
     printf("%d\n", i + 1);
     return 0;
 }
@@ -18624,10 +18933,10 @@ EOCP
 			case "$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.
+I'll play safe and guess it is $safebits bits.
 EOM
-				selectminbits=32
-				bits="32 bits"
+				selectminbits=$safebits
+				bits="$safebits bits"
 				;;
 			1)	bits="1 bit" ;;
 			*)	bits="$selectminbits bits" ;;
@@ -18636,7 +18945,8 @@ EOM
 		else
 			rp='What is the minimum number of bits your select() operates on?'
 			case "$byteorder" in
-			1234|12345678)	dflt=32 ;;
+			12345678)	dflt=64 ;;
+			1234)		dflt=32 ;;
 			*)		dflt=1	;;
 			esac
 			. ./myread
@@ -18646,7 +18956,7 @@ EOM
 		$rm -f try.* try
 		;;
 	*)	: no select, so pick a harmless default
-		selectminbits='32'
+		selectminbits=$safebits
 		;;
 	esac
 	;;
@@ -18693,9 +19003,13 @@ 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
-$cat > signal.c <<'EOCP'
+$cat > signal.c <<EOCP
 #include <sys/types.h>
 #include <signal.h>
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#include <stdlib.h>
+#endif
 #include <stdio.h>
 int main() {
 
@@ -19217,6 +19531,16 @@ case "$uidsign" in
 	;;
 esac
 
+
+case "$usesitecustomize" in
+    $define|true|[Yy]*)
+	usesitecustomize="$define"
+	;;
+    *)
+	usesitecustomize="$undef"
+	;;
+    esac
+
 : determine compiler compiler
 case "$yacc" in
 '')
@@ -19277,10 +19601,6 @@ 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
@@ -19918,6 +20238,39 @@ set X $avail_ext
 shift
 avail_ext="$*"
 
+case "$onlyextensions" in
+'') ;;
+*)  keepextensions=''
+    echo "You have requested that only certains extensions be included..." >&4
+    for i in $onlyextensions; do
+        case " $avail_ext " in
+        *" $i "*)
+            echo "Keeping extension $i."
+            keepextensions="$keepextensions $i"
+            ;;
+        *) echo "Ignoring extension $i." ;;
+        esac
+    done
+    avail_ext="$keepextensions"
+    ;;
+esac
+
+case "$noextensions" in
+'') ;;
+*)  keepextensions=''
+    echo "You have requested that certain extensions be ignored..." >&4
+    for i in $avail_ext; do
+        case " $noextensions " in
+        *" $i "*) echo "Ignoring extension $i." ;;
+        *) echo "Keeping extension $i.";
+           keepextensions="$keepextensions $i"
+           ;;
+        esac
+    done
+    avail_ext="$keepextensions"
+    ;;
+esac
+
 : Now see which nonxs extensions are supported on this system.
 : For now assume all are.
 nonxs_ext=''
@@ -20070,6 +20423,23 @@ set X $dynamic_ext $static_ext $nonxs_ext
 shift
 extensions="$*"
 
+# Sanity check:  We require an extension suitable for use with
+# AnyDBM_File, as well as Fcntl and IO.  (Failure to have these
+# should show up as failures in the test suite, but it's helpful to
+# catch them now.) The 'extensions' list is normally sorted
+# alphabetically, so we need to accept either
+#    DB_File ... Fcntl ... IO  ....
+# or something like
+#    Fcntl ... NDBM_File ... IO  ....
+case " $extensions"  in
+*"_File "*" Fcntl "*" IO "*) ;; # DB_File
+*" Fcntl "*"_File "*" IO "*) ;; # GDBM_File
+*" Fcntl "*" IO "*"_File "*) ;; # NDBM_File
+*) echo "WARNING: Extensions DB_File or *DBM_File, Fcntl, and IO not configured." >&4
+   echo "WARNING: The Perl you are building will be quite crippled." >& 4
+   ;;
+esac
+
 : Remove libraries needed only for extensions
 : The appropriate ext/Foo/Makefile.PL will add them back in, if necessary.
 : The exception is SunOS 4.x, which needs them.
@@ -20255,6 +20625,7 @@ d_SCNfldbl='$d_SCNfldbl'
 d__fwalk='$d__fwalk'
 d_access='$d_access'
 d_accessx='$d_accessx'
+d_aintl='$d_aintl'
 d_alarm='$d_alarm'
 d_archlib='$d_archlib'
 d_asctime_r='$d_asctime_r'
@@ -20277,6 +20648,7 @@ d_class='$d_class'
 d_closedir='$d_closedir'
 d_cmsghdr_s='$d_cmsghdr_s'
 d_const='$d_const'
+d_copysignl='$d_copysignl'
 d_crypt='$d_crypt'
 d_crypt_r='$d_crypt_r'
 d_csh='$d_csh'
@@ -20310,6 +20682,7 @@ d_endsent='$d_endsent'
 d_endservent_r='$d_endservent_r'
 d_eofnblk='$d_eofnblk'
 d_eunice='$d_eunice'
+d_faststdio='$d_faststdio'
 d_fchdir='$d_fchdir'
 d_fchmod='$d_fchmod'
 d_fchown='$d_fchown'
@@ -20401,6 +20774,7 @@ d_gnulibc='$d_gnulibc'
 d_grpasswd='$d_grpasswd'
 d_hasmntopt='$d_hasmntopt'
 d_htonl='$d_htonl'
+d_ilogbl='$d_ilogbl'
 d_index='$d_index'
 d_inetaton='$d_inetaton'
 d_int64_t='$d_int64_t'
@@ -20412,6 +20786,7 @@ d_isnanl='$d_isnanl'
 d_killpg='$d_killpg'
 d_lchown='$d_lchown'
 d_ldbl_dig='$d_ldbl_dig'
+d_libm_lib_version='$d_libm_lib_version'
 d_link='$d_link'
 d_localtime_r='$d_localtime_r'
 d_locconv='$d_locconv'
@@ -20454,7 +20829,6 @@ d_msgsnd='$d_msgsnd'
 d_msync='$d_msync'
 d_munmap='$d_munmap'
 d_mymalloc='$d_mymalloc'
-d_nanosleep='$d_nanosleep'
 d_nice='$d_nice'
 d_nl_langinfo='$d_nl_langinfo'
 d_nv_preserves_uv='$d_nv_preserves_uv'
@@ -20472,6 +20846,7 @@ d_poll='$d_poll'
 d_portable='$d_portable'
 d_procselfexe='$d_procselfexe'
 d_pthread_atfork='$d_pthread_atfork'
+d_pthread_attr_setscope='$d_pthread_attr_setscope'
 d_pthread_yield='$d_pthread_yield'
 d_pwage='$d_pwage'
 d_pwchange='$d_pwchange'
@@ -20497,6 +20872,7 @@ d_safebcpy='$d_safebcpy'
 d_safemcpy='$d_safemcpy'
 d_sanemcmp='$d_sanemcmp'
 d_sbrkproto='$d_sbrkproto'
+d_scalbnl='$d_scalbnl'
 d_sched_yield='$d_sched_yield'
 d_scm_rights='$d_scm_rights'
 d_seekdir='$d_seekdir'
@@ -20579,6 +20955,8 @@ d_strerrm='$d_strerrm'
 d_strerror='$d_strerror'
 d_strerror_r='$d_strerror_r'
 d_strftime='$d_strftime'
+d_strlcat='$d_strlcat'
+d_strlcpy='$d_strlcpy'
 d_strtod='$d_strtod'
 d_strtol='$d_strtol'
 d_strtold='$d_strtold'
@@ -20825,21 +21203,21 @@ installprivlib='$installprivlib'
 installscript='$installscript'
 installsitearch='$installsitearch'
 installsitebin='$installsitebin'
-installsitehtml1='$installsitehtml1'
-installsitehtml3='$installsitehtml3'
+installsitehtml1dir='$installsitehtml1dir'
+installsitehtml3dir='$installsitehtml3dir'
 installsitelib='$installsitelib'
-installsiteman1='$installsiteman1'
-installsiteman3='$installsiteman3'
+installsiteman1dir='$installsiteman1dir'
+installsiteman3dir='$installsiteman3dir'
 installsitescript='$installsitescript'
 installstyle='$installstyle'
 installusrbinperl='$installusrbinperl'
 installvendorarch='$installvendorarch'
 installvendorbin='$installvendorbin'
-installvendorhtml1='$installvendorhtml1'
-installvendorhtml3='$installvendorhtml3'
+installvendorhtml1dir='$installvendorhtml1dir'
+installvendorhtml3dir='$installvendorhtml3dir'
 installvendorlib='$installvendorlib'
-installvendorman1='$installvendorman1'
-installvendorman3='$installvendorman3'
+installvendorman1dir='$installvendorman1dir'
+installvendorman3dir='$installvendorman3dir'
 installvendorscript='$installvendorscript'
 intsize='$intsize'
 issymlink='$issymlink'
@@ -20895,6 +21273,7 @@ man3dir='$man3dir'
 man3direxp='$man3direxp'
 man3ext='$man3ext'
 mips_type='$mips_type'
+mistrustnm='$mistrustnm'
 mkdir='$mkdir'
 mmaptype='$mmaptype'
 modetype='$modetype'
@@ -20948,7 +21327,6 @@ pg='$pg'
 phostname='$phostname'
 pidtype='$pidtype'
 plibpth='$plibpth'
-pm_apiversion='$pm_apiversion'
 pmake='$pmake'
 pr='$pr'
 prefix='$prefix'
@@ -21019,17 +21397,17 @@ sitearch='$sitearch'
 sitearchexp='$sitearchexp'
 sitebin='$sitebin'
 sitebinexp='$sitebinexp'
-sitehtml1='$sitehtml1'
-sitehtml1exp='$sitehtml1exp'
-sitehtml3='$sitehtml3'
-sitehtml3exp='$sitehtml3exp'
+sitehtml1dir='$sitehtml1dir'
+sitehtml1direxp='$sitehtml1direxp'
+sitehtml3dir='$sitehtml3dir'
+sitehtml3direxp='$sitehtml3direxp'
 sitelib='$sitelib'
 sitelib_stem='$sitelib_stem'
 sitelibexp='$sitelibexp'
-siteman1='$siteman1'
-siteman1exp='$siteman1exp'
-siteman3='$siteman3'
-siteman3exp='$siteman3exp'
+siteman1dir='$siteman1dir'
+siteman1direxp='$siteman1direxp'
+siteman3dir='$siteman3dir'
+siteman3direxp='$siteman3direxp'
 siteprefix='$siteprefix'
 siteprefixexp='$siteprefixexp'
 sitescript='$sitescript'
@@ -21099,9 +21477,11 @@ use64bitall='$use64bitall'
 use64bitint='$use64bitint'
 usecrosscompile='$usecrosscompile'
 usedl='$usedl'
+usefaststdio='$usefaststdio'
 useithreads='$useithreads'
 uselargefiles='$uselargefiles'
 uselongdouble='$uselongdouble'
+usemallocwrap='$usemallocwrap'
 usemorebits='$usemorebits'
 usemultiplicity='$usemultiplicity'
 usemymalloc='$usemymalloc'
@@ -21110,8 +21490,10 @@ useopcode='$useopcode'
 useperlio='$useperlio'
 useposix='$useposix'
 usereentrant='$usereentrant'
+userelocatableinc='$userelocatableinc'
 usesfio='$usesfio'
 useshrplib='$useshrplib'
+usesitecustomize='$usesitecustomize'
 usesocks='$usesocks'
 usethreads='$usethreads'
 usevendorprefix='$usevendorprefix'
@@ -21128,17 +21510,17 @@ vendorarch='$vendorarch'
 vendorarchexp='$vendorarchexp'
 vendorbin='$vendorbin'
 vendorbinexp='$vendorbinexp'
-vendorhtml1='$vendorhtml1'
-vendorhtml1exp='$vendorhtml1exp'
-vendorhtml3='$vendorhtml3'
-vendorhtml3exp='$vendorhtml3exp'
+vendorhtml1dir='$vendorhtml1dir'
+vendorhtml1direxp='$vendorhtml1direxp'
+vendorhtml3dir='$vendorhtml3dir'
+vendorhtml3direxp='$vendorhtml3direxp'
 vendorlib='$vendorlib'
 vendorlib_stem='$vendorlib_stem'
 vendorlibexp='$vendorlibexp'
-vendorman1='$vendorman1'
-vendorman1exp='$vendorman1exp'
-vendorman3='$vendorman3'
-vendorman3exp='$vendorman3exp'
+vendorman1dir='$vendorman1dir'
+vendorman1direxp='$vendorman1direxp'
+vendorman3dir='$vendorman3dir'
+vendorman3direxp='$vendorman3direxp'
 vendorprefix='$vendorprefix'
 vendorprefixexp='$vendorprefixexp'
 vendorscript='$vendorscript'
@@ -21149,7 +21531,6 @@ versiononly='$versiononly'
 vi='$vi'
 voidflags='$voidflags'
 xlibpth='$xlibpth'
-xs_apiversion='$xs_apiversion'
 yacc='$yacc'
 yaccflags='$yaccflags'
 zcat='$zcat'