Re: 5.005_03 and gcc, GNU ld under Solaris 2.6

To: Hugo van der Sanden <hugo@corp.netcom.net.uk>
Cc: Perl Porters <perl5-porters@perl.org>
Message-Id: <Pine.GSU.4.05.9904141658290.4262-100000@newton.phys>

p4raw-id: //depot/cfgperl@3261

1 files changed, 60 insertions, 36 deletions

diff --git a/hints/solaris_2.sh b/hints/solaris_2.sh
index ad84669a70..21e51d1113 100644
--- a/hints/solaris_2.sh
+++ b/hints/solaris_2.sh
@@ -1,6 +1,6 @@
 # hints/solaris_2.sh
-# Last modified:  Wed May 27 13:04:45 EDT 1998
-# Andy Dougherty  <doughera@lafcol.lafayette.edu>
+# Last modified:  Tue Apr 13 13:12:49 EDT 1999
+# Andy Dougherty  <doughera@lafayette.edu>
 # Based on input from lots of folks, especially
 # Dean Roehrich <roehrich@ironwood-fddi.cray.com>
 
@@ -9,7 +9,10 @@
 # way to do that is to invoke Configure with
 # 
 #     sh Configure -Dcc='gcc -B/usr/ccs/bin/'
-# 
+#
+#  (Note that the trailing slash is *required*.)
+#  gcc will occasionally emit warnings about "unused prefix", but
+#  these ought to be harmless.  See below for more details.
  
 # See man vfork.
 usevfork=false
@@ -140,6 +143,19 @@ cat > UU/cc.cbu <<'EOSH'
 #
 # Watch out in case they have not set $cc.
 
+# Perl compiled with some combinations of GNU as and ld may not 
+# be able to perform dynamic loading of extensions.  If you have a
+# problem with dynamic loading, be sure that you are using the Solaris
+# /usr/ccs/bin/as and /usr/ccs/bin/ld.  You can do that with
+#  		sh Configure -Dcc='gcc -B/usr/ccs/bin/'
+# (note the trailing slash is required). 
+# Combinations that are known to work with the following hints:
+#
+#  gcc-2.7.2, GNU as 2.7, GNU ld 2.7
+#  egcs-1.0.3, GNU as 2.9.1 and GNU ld 2.9.1
+#	--Andy Dougherty  <doughera@lafayette.edu>  
+#	Tue Apr 13 17:19:43 EDT 1999
+
 # Get gcc to share its secrets.
 echo 'main() { return 0; }' > try.c
 	# Indent to avoid propagation to config.sh
@@ -149,7 +165,6 @@ if echo "$verbose" | grep '^Reading specs from' >/dev/null 2>&1; then
 	#
 	# Using gcc.
 	#
-	#echo Using gcc
 
 	tmp=`echo "$verbose" | grep '^Reading' |
 		awk '{print $NF}'  | sed 's/specs$/include/'`
@@ -157,67 +172,76 @@ if echo "$verbose" | grep '^Reading specs from' >/dev/null 2>&1; then
 	# Determine if the fixed-includes look like they'll work.
 	# Doesn't work anymore for gcc-2.7.2.
 
-	# See if as(1) is GNU as(1).  GNU as(1) won't work for this job.
+	# See if as(1) is GNU as(1).  GNU as(1) might not work for this job.
 	if echo "$verbose" | grep ' /usr/ccs/bin/as ' >/dev/null 2>&1; then
 	    :
 	else
 	    cat <<END >&2
 
-NOTE: You are using GNU as(1).  GNU as(1) will not build Perl.
-I'm arranging to use /usr/ccs/bin/as by including -B/usr/ccs/bin/
+NOTE: You are using GNU as(1).  GNU as(1) might not build Perl.  If you
+have trouble, you can use /usr/ccs/bin/as by including -B/usr/ccs/bin/
 in your ${cc:-cc} command.  (Note that the trailing "/" is required.)
 
 END
-	    cc="${cc:-cc} -B/usr/ccs/bin/"
+	    # Apparently not needed, at least for as 2.7 and later.
+	    # cc="${cc:-cc} -B/usr/ccs/bin/"
 	fi
 
-	# See if ld(1) is GNU ld(1).  GNU ld(1) won't work for this job.
+	# See if ld(1) is GNU ld(1).  GNU ld(1) might not work for this job.
 	# Recompute $verbose since we may have just changed $cc.
 	verbose=`${cc:-cc} -v -o try try.c 2>&1 | grep ld 2>&1`
+
 	if echo "$verbose" | grep ' /usr/ccs/bin/ld ' >/dev/null 2>&1; then
+	    # Ok, gcc directly calls the Solaris /usr/ccs/bin/ld.
+	    :
+	elif echo "$verbose" | grep "ld: Software Generation Utilities" >/dev/null 2>&1; then
+	    # Hmm.  gcc doesn't call /usr/ccs/bin/ld directly, but it
+	    # does appear to be using it eventually.  egcs-1.0.3's ld
+	    # wrapper does this.
+	    # All Solaris versions of ld I've seen contain the magic
+	    # string used in the grep.
 	    :
 	else
-        # It's not /usr/ccs/bin/ld - but it might be egcs's ld wrapper,
-        # which calls /usr/ccs/bin/ld in turn. Passing -V to it will
-        # make it show its true colors.
+	    # No evidence yet of /usr/ccs/bin/ld.  Some versions
+	    # of egcs's ld wrapper call /usr/ccs/bin/ld in turn but
+	    # apparently don't reveal that unless you pass in -V.
+	    # (This may all depend on local configurations too.)
 
 	    myld=`echo $verbose| grep ld | awk '/\/ld/ {print $1}'`
-            # This assumes that gcc's output will not change, and that
-            # /full/path/to/ld will be the first word of the output.
-
-            # all Solaris versions of ld I've seen contain the magic
-            # string used in the grep below.
-            if $myld -V 2>&1 | grep "ld: Software Generation Utilities" >/dev/null 2>&1; then
-                cat <<END >&2
-
-Aha. You're using egcs and /usr/ccs/bin/ld.
-
-END
-
-            else
-	    cat <<END >&2
+	    # This assumes that gcc's output will not change, and that
+	    # /full/path/to/ld will be the first word of the output.
+	    # Thus myld is something like opt/gnu/sparc-sun-solaris2.5/bin/ld
+
+	    if $myld -V 2>&1 | grep "ld: Software Generation Utilities" >/dev/null 2>&1; then
+		# Ok, /usr/ccs/bin/ld eventually does get called.
+		:
+	    else
+		cat <<END >&2
 
-NOTE: You are using GNU ld(1).  GNU ld(1) will not build Perl.
-I'm arranging to use /usr/ccs/bin/ld by including -B/usr/ccs/bin/
+NOTE: You are using GNU ld(1).  GNU ld(1) might not build Perl.  If you
+have trouble, you can use /usr/ccs/bin/ld by including -B/usr/ccs/bin/
 in your ${cc:-cc} command.  (Note that the trailing "/" is required.)
 
+I will try to use GNU ld by passing in the -Wl,-E flag, but if that
+doesn't work, you should use -B/usr/ccs/bin/ instead.
+
 END
-	    cc="${cc:-cc} -B/usr/ccs/bin/"
-            fi
+		ccdlflags="$ccdlflags -Wl,-E"
+		lddlflags="$lddlflags -W,l-E -G"
+	    fi
 	fi
 
 else
 	#
 	# Not using gcc.
 	#
-	#echo Not using gcc
 
-	# See if as(1) is GNU as(1).  GNU as(1) won't work for this job.
+	# See if as(1) is GNU as(1).  GNU might not work for this job.
 	case `as --version < /dev/null 2>&1` in
 	*GNU*)
 		cat <<END >&2
 
-NOTE: You are using GNU as(1).  GNU as(1) will not build Perl.
+NOTE: You are using GNU as(1).  GNU as(1) might not build Perl.
 You must arrange to use /usr/ccs/bin/as, perhaps by adding /usr/ccs/bin
 to the beginning of your PATH.
 
@@ -225,7 +249,7 @@ END
 		;;
 	esac
 
-	# See if ld(1) is GNU ld(1).  GNU ld(1) won't work for this job.
+	# See if ld(1) is GNU ld(1).  GNU ld(1) might not work for this job.
 	# ld --version doesn't properly report itself as a GNU tool,
 	# as of ld version 2.6, so we need to be more strict. TWP 9/5/96
 	gnu_ld=false
@@ -245,8 +269,8 @@ END
 	if $gnu_ld ; then
 		cat <<END >&2
 
-NOTE: You are apparently using GNU ld(1).  GNU ld(1) will not build Perl.
-You must arrange to use /usr/ccs/bin/ld, perhaps by adding /usr/ccs/bin
+NOTE: You are apparently using GNU ld(1).  GNU ld(1) might not build Perl.
+You should arrange to use /usr/ccs/bin/ld, perhaps by adding /usr/ccs/bin
 to the beginning of your PATH.
 
 END