>Number:         22052
>Category:       pkg
>Synopsis:       mk/buildlink2/fake-la: support for GNU ld scripts
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Fri Jul 04 07:54:01 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     Joachim Koenig-Baltes
>Release:        Suse Linux 8.2 Professional
>Organization:
	
>Environment:
Linux version 2.4.20-4GB-athlon (root@Athlon.suse.de) (gcc version 3.3
20030226 (prerelease) (SuSE Linux)) #1 Mon Mar 17 17:56:47 UTC 2003
>Description:
newer versions of Linux ship with gcc 3.3 which support GNU ld link scripts
for shared object libraries. E.g. the content of /usr/lib/libpthread.so on
Suse 8.2 Professional is like this:

	/* GNU ld script
	   Use the shared library, but some functions are only in
	   the static library, so try that secondarily.  */
	OUTPUT_FORMAT(elf32-i386)
	GROUP ( /lib/libpthread.so.0 /usr/lib/libpthread_nonshared.a )

fake-la has to determine a version number for /usr/lib/libpthread.so when
building packages that require libpthread, so fake-la sould be able to
parse such files.
>How-To-Repeat:
% cd pkgsrc/devel/glib2
% bmake
and see it fail in determining the libpthread version number
>Fix:
The following patch expands my already commited previous enhancement to
fake-la, that addressed logical links for libraries by a parsing capability
for GNU ld scripts:


--- fake-la.orig	2003-06-20 10:24:09.000000000 +0200
+++ fake-la	2003-07-04 09:27:07.000000000 +0200
@@ -24,13 +24,20 @@
 
 case $libname in
 	*.so)
-		# no version in name which happens e.g. for libpthread.so on Linux
-		# Suse 8.1, Slackware 8.1 and others, but there, the library is a link
-		# to a library with a version in it
+		# no version in name which happens e.g. for libpthread.so on
+		# Linux
 		libbase=`${ECHO} $libname | ${SED} -e "s/\.so$//"`
 		if ${TEST} -h $reallib; then
+			# library is a link to library with a version in it,
+			# e.g. on Suse 8.1, Slackware 8.1 and others
 			liblinked=`ls -l $reallib | ${AWK} '{print $NF}'`
 			version=`${ECHO} $liblinked | ${SED} -e "s/.*\.so\.//;s/\./:/g"`
+		elif ${TEST} -f $reallib; then
+			# ordinary file could be a GNU ld link script
+			# (e.g. /usr/lib/libpthread.so on Suse 8.2)
+			# so filter out first element of GROUP directive
+			liblinked=`${AWK} '/^GROUP/ {print $3}' < $reallib`
+			version=`${ECHO} $liblinked | ${SED} -e "s/.*\.so\.//;s/\./:/g"`
 		else
 			# bail out
 			${ECHO} "could not determine version of $reallib"

Joachim
>Release-Note:
>Audit-Trail:
>Unformatted: