source: scripts/untested/autotools/patches/libtool-1.4.2-expsym-linux.patch @ d1afb9e

  This patch makes -export-symbols and -export-symbols-regex work with
  GNU ld.  It creates a version script rather than using -retain-symbols-file,
  which just selectively strips the library.

--- libtool-1.4.2/libtool.m4.expsym-linux       Fri Aug 23 19:01:55 2002
+++ libtool-1.4.2/libtool.m4    Sat Aug 24 13:47:10 2002
@@ -1401,6 +1401,30 @@
     hardcode_shlibpath_var=no
     ;;
 
+  linux*)
+    if $LD --help 2>&1 | egrep ': supported targets:.* elf' > /dev/null; then
+      archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'
+      supports_anon_versioning=no
+      case `$LD -v 2>/dev/null` in
+        *\ [01].* | *\ 2.[[0-9]].* | *\ 2.10.*) ;; # catch versions < 2.11
+        *\ 2.11.93.0.2\ *) supports_anon_versioning=yes ;; # RH7.3 ...
+        *\ 2.11.92.0.12\ *) supports_anon_versioning=yes ;; # Mandrake 8.2 ...
+        *\ 2.11.*) ;; # other 2.11 versions
+        *) supports_anon_versioning=yes ;;
+      esac
+      if test $supports_anon_versioning = yes; then
+        archive_expsym_cmds='$echo "{ global:" > $output_objdir/$libname.ver~
+cat $export_symbols | sed -e "s/\(.*\)/\1;/" >> $output_objdir/$libname.ver~
+$echo "local: *; };" >> $output_objdir/$libname.ver~
+        $CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname ${wl}-version-script ${wl}$output_objdir/$libname.ver -o $lib'
+      else
+        $archive_expsym_cmds="$archive_cmds"
+      fi
+    else
+      ld_shlibs=no
+    fi
+    ;;
+
   *)
     if $LD --help 2>&1 | egrep ': supported targets:.* elf' > /dev/null; then
       archive_cmds='$CC -shared $libobjs $deplibs $compiler_flags ${wl}-soname $wl$soname -o $lib'