update SCO hints for dynamic loading

	Date: Mon, 28 Sep 1998 16:50:38 -0400 (EDT)
	Message-Id: <Pine.SUN.3.96.980928164648.8130E-100000@newton.phys>
	Subject: [PATCH 5.004_04-MAINT_TRIAL_5 and 5.005_xx] Re: Perl on SCO_SV
	--
	Date: Tue, 29 Sep 1998 16:48:55 -0400 (EDT)
	Message-Id: <Pine.SUN.3.96.980929164612.8634A-100000@newton.phys>
	Subject: Re: [PATCH 5.004_04-MAINT_TRIAL_5 and 5.005_xx] Re: Perl on SCO_SV

p4raw-id: //depot/perl@1909

1 files changed, 60 insertions, 80 deletions

diff --git a/hints/sco.sh b/hints/sco.sh
index cef1c0c942..419a720210 100644
--- a/hints/sco.sh
+++ b/hints/sco.sh
@@ -1,16 +1,15 @@
-# sco.sh 
+# sco.sh
 # Courtesy of Joel Rosi-Schwartz <j.schwartz@agonet.it>
 
 # Additional SCO version info from
 # Peter Wolfe	<wolfe@teloseng.com>
-# Last revised 
+# Last revised
 # Fri Jul 19 14:54:25 EDT 1996
-# by Andy Dougherty  <doughera@lafcol.lafayette.edu>
+# and again Tue Sep 29 16:37:25 EDT 1998
+# by Andy Dougherty  <doughera@lafayette.edu>
 
-# To use gcc, use     sh Configure -Dcc=gcc
-# But gcc will *not* do dynamic laoding on 3.2.5,
-# for that use        sh Configure -Dcc=icc
-# See below for more details.
+# To use gcc, use   sh Configure -Dcc=gcc
+# To use icc, use   sh Configure -Dcc=icc
 
 # figure out what SCO version we are. The output of uname -X is
 # something like:
@@ -18,84 +17,94 @@
 #	Node = xxxxx
 #	Release = 3.2v5.0.0
 #	KernelID = 95/08/08
-#	Machine = Pentium  
+#	Machine = Pentium
 #	BusType = ISA
 #	Serial = xxxxx
 #	Users = 5-user
 #	OEM# = 0
 #	Origin# = 1
-#	NumCPU = 1 
- 
-# Use /bin/uname (because Gnu may be first on the path and
+#	NumCPU = 1
+
+# Use /bin/uname (because GNU uname may be first in $PATH and
 # it does not support -X) to figure out what SCO version we are:
 case `/bin/uname -X | egrep '^Release'` in
-*3.2v4.*) scorls=3 ;;   # I don't know why this is 3 instead of 4 :-)
+*3.2v4.*) scorls=3 ;;   # I don't know why this is 3 instead of 4.
 *3.2v5.*) scorls=5 ;;
-*) scorls=3 ;; # this probabaly shouldn't happen
+*) scorls=5 ;; # Hope the future will be compatible.
 esac
 
 # Try to use libintl.a since it has strcoll and strxfrm
 libswanted="intl $libswanted"
 # Try to use libdbm.nfs.a since it has dbmclose.
-# 
+#
 if test -f /usr/lib/libdbm.nfs.a ; then
     libswanted=`echo "dbm.nfs $libswanted " | sed -e 's/ dbm / /'`
+    set X $libswanted
+    shift
+    libswanted="$*"
 fi
-set X $libswanted
-shift
-libswanted="$*"
 
 # We don't want Xenix cross-development libraries
 glibpth=`echo $glibpth | sed -e 's! /usr/lib/386 ! !' -e 's! /lib/386 ! !'`
 xlibpth=''
 
+# Common fix for all compilers.
+ccflags="$ccflags -U M_XENIX"
+
+# Set flags for optimization and warning levels.
 case "$cc" in
-*gcc*)	ccflags="$ccflags -U M_XENIX"
-	optimize="$optimize -O2"
+*gcc*)	case "$optimize" in
+	'') optimize='-O2' ;;
+	esac
 	;;
-scocc)	;;
-
-# On SCO 3.2v5 both cc and icc can build dynamic load, but cc core
-# dumps if optimised, so I am only setting this up for icc.
-# It is possible that some 3.2v4.2 system have icc, I seem to
-# recall it was available as a seperate product but I have no
-# knowledge if it can do dynamic loading and if so how.
-#	Joel Rosi-Schwartz
-icc)# Apparently, SCO's cc gives rather verbose warnings
-	# Set -w0 to turn them off.
+scocc)	;;  # Anybody know anything about this?
+*)	# icc or cc  -- only relevant difference is safe level of
+	# optimization.  Apparently.
 	case $scorls in
-	3) ccflags="$ccflags -W0 -quiet -U M_XENIX" ;;
-	5) ccflags="$ccflags -belf -w0 -U M_XENIX"
-	   optimize="-O1" # -g -O1 will not work
-	 # optimize="-O0" may be needed for pack test to pass.
-       lddlflags='-G -L/usr/local/lib'
-       ldflags=' -W l,-Bexport -L/usr/local/lib'
-       dlext='so'
-       dlsrc='dl_dlopen.xs'
-       usedl='define'
-	   ;;
+	3)  ccflags="$ccflags -W0 -quiet" ;;
+	*)  ccflags="$ccflags -w0" ;;
 	esac
-	;;
-
-*)	# Apparently, miniperl core dumps if -O is used.
 	case "$optimize" in
-	'') optimize=none ;;
-	esac
-	# Apparently, SCO's cc gives rather verbose warnings
-	# Set -w0 to turn them off.
-	case $scorls in
-	3) ccflags="$ccflags -W0 -quiet -U M_XENIX" ;;
-	5) ccflags="$ccflags -w0 -U M_XENIX -DPERL_SCO5" ;;
+	'') case "$cc" in
+	    icc) optimize="-O1" ;;
+	    *) optimize="-O0" ;;
+	    esac
+	    ;;
 	esac
 	;;
 esac
-i_varargs=undef
+
+# DYNAMIC LOADING:  Dynamic loading won't work with scorls=3.
+# It ought to work with Release = 3.2v5.0.0 or later.
+if test "$scorls" = "3" -a "X$usedl" = "X"; then
+    usedl=$undef
+else
+    # I do not know exactly which of these are essential,
+    # but this set has been recommended. --AD
+    # These ought to be patched back into metaconfig, but the
+    # current metaconfig units don't touch ccflags.
+    # Unfortunately, the default on SCO is to produce COFF output, but
+    # ELF is needed for dynamic loading, and the cc man page recommends
+    # "Always specify option -b elf if ELF and COFF files might be mixed."
+    # Therefore, we'll compile everything with -b elf.
+    case "$cc" in
+    *gcc*)  ;;
+    *)	ccflags="$ccflags -b elf" ;;
+    esac
+    cccdlflags=none
+    ccdlflags='-W l,-Bexport'
+    lddlflags="$lddlflags -b elf -G"
+    ldflags="$ldflags -b elf -W l,-Bexport"
+fi
 
 # I have received one report that nm extraction doesn't work if you're
 # using the scocc compiler.  This system had the following 'myconfig'
 # uname='xxx xxx 3.2 2 i386 '
 # cc='scocc', optimize='-O'
-usenm='false'
+# You can override this with Configure -Dusenm.
+case "$usenm" in
+'') usenm='false' ;;
+esac
 
 # If you want to use nm, you'll probably have to use nm -p.  The
 # following does that for you:
@@ -105,35 +114,6 @@ nm_opt='-p'
 # pp_sys.c.  Uncomment the following line if that happens to you:
 # i_utime=undef
 
-# Apparently, some versions of SCO include both .so and .a libraries,
-# but they don't mix as they do on other ELF systems.  The upshot is
-# that Configure finds -ldl (libdl.so) but 'ld' complains it can't
-# find libdl.a. 
-# I don't know which systems have this feature, so I'll just remove
-# -dl from libswanted for all SCO systems until someone can figure
-# out how to get dynamic loading working on SCO.
-#
-# The output of uname -X on one such system was
-#	System = SCO_SV
-#	Node = xxxxx
-#	Release = 3.2v5.0.0
-#	KernelID = 95/08/08
-#	Machine = Pentium  
-#	BusType = ISA
-#	Serial = xxxxx
-#	Users = 5-user
-#	OEM# = 0
-#	Origin# = 1
-#	NumCPU = 1 
-#
-# The 5.0.0 on the Release= line is probably the thing to watch.
-#	Andy Dougherty <doughera@lafcol.lafayette.edu>
-#	Thu Feb  1 15:06:56 EST 1996
-libswanted=`echo " $libswanted " | sed -e 's/ dl / /'`
-set X $libswanted
-shift
-libswanted="$*"
-
 # Perl 5.003_05 and later try to include both <time.h> and <sys/select.h>
 # in pp_sys.c, but that fails due to a redefinition of struct timeval.
 # This will generate a WHOA THERE.  Accept the default.