From: Andy Dougherty <doughera@lafayette.edu>
Date: Tue, 15 Jul 2003 10:52:58 +0000 (-0400)
Subject: Re: [perl #22941] Can't build perl with -Duseshrplib if /usr/bin/gcc is a perl script
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=830717a75f047ef8412eae24a226ec989038565f;p=p5sagit%2Fp5-mst-13.2.git

Re: [perl #22941] Can't build perl with -Duseshrplib if /usr/bin/gcc is a perl script
Date: Tue, 15 Jul 2003 10:52:58 -0400 (EDT)
Message-ID: <Pine.SOL.4.53.0307151011550.7002@maxwell.phys.lafayette.edu>

plus a clarification to INSTALL :
Subject: [PATCH] Re: [perl #22941] Can't build perl with -Duseshrplib if /usr/bin/gcc is a perl script
From: Andy Dougherty <doughera@lafayette.edu>
Date: Wed, 16 Jul 2003 11:01:24 -0400 (EDT)
Message-ID: <Pine.SOL.4.53.0307161059400.10258@maxwell.phys.lafayette.edu>

p4raw-id: //depot/perl@20172
---

diff --git a/INSTALL b/INSTALL
index 359c68a..1f2ac62 100644
--- a/INSTALL
+++ b/INSTALL
@@ -972,10 +972,14 @@ LD_PRELOAD, specifying the exact filename you wish to be used; and on
 Digital Unix, you can override LD_LIBRARY_PATH by setting the
 _RLD_ROOT environment variable to point to the perl build directory.
 
-The only reliable answer is that you should specify a different
-directory for the architecture-dependent library for your -DDEBUGGING
-version of perl.  You can do this by changing all the *archlib*
-variables in config.sh to point to your new architecture-dependent library.
+In other words, it is generally not a good idea to try to build a perl
+with a shared library if $archlib/CORE/$libperl already exists from a
+previous build.
+
+A good workaround is to specify a different directory for the
+architecture-dependent library for your -DDEBUGGING version of perl.
+You can do this by changing all the *archlib* variables in config.sh to
+point to your new architecture-dependent library.
 
 =head2 Malloc Issues
 
diff --git a/Makefile.SH b/Makefile.SH
index cf2f38e..ae6072e 100644
--- a/Makefile.SH
+++ b/Makefile.SH
@@ -104,6 +104,13 @@ true)
 
 	case "$osname" in
 	linux)
+	    # If there is a pre-existing $libperl from a previous
+	    # installation, Linux needs to use LD_PRELOAD to
+	    # override the LD_LIBRARY_PATH setting.  See the
+	    # INSTALL file, under "Building a shared perl library".
+	    # If there is no pre-existing $libperl, we don't need
+	    # to do anything further.
+	    if test -f $archlib/CORE/$libperl; then
 		rm -f preload
 		cat <<'EOT' > preload
 #! /bin/sh
@@ -114,7 +121,8 @@ exec "$@"
 EOT
 		chmod 755 preload
 		ldlibpth="$ldlibpth `pwd`/preload `pwd`/$libperl"
-		;;
+	    fi
+	    ;;
 	os390)	test -f /bin/env && ldlibpth="/bin/env $ldlibpth"
 		;;
 	esac