Import patch from Debian http://bugs.debian.org/347650 which hacks around libtool deplib re-ordering, which inhibits -Wl,--as-needed. You have to set -Wl,--as-needed seperately in LDFLAGS for this to do any good, -Wl,--as-needed,--something-else will not do, but you can set -Wl,--something-else afterwards. Also make sure eclasses I 'own' run elibtoolize so they can reap the benefit.

3 files changed, 106 insertions, 0 deletions

diff --git a/eclass/ELT-patches/as-needed/1.5 b/eclass/ELT-patches/as-needed/1.5
new file mode 100644
index 000000000000..d9d45652c505
--- /dev/null
+++ b/eclass/ELT-patches/as-needed/1.5
@@ -0,0 +1,30 @@
+--- ltmain.sh.orig	2006-03-29 15:45:36.000000000 +0200
++++ ltmain.sh	2006-03-29 16:39:30.000000000 +0200
+@@ -1754,6 +1754,11 @@
+ 	arg=`$echo "X$arg" | $Xsed -e "s/^ //"`
+ 	;;
+ 
++      -Wl,--as-needed)
++	deplibs="$deplibs $arg"
++	continue
++	;;
++      
+       -Wl,*)
+ 	args=`$echo "X$arg" | $Xsed -e "$sed_quote_subst" -e 's/^-Wl,//'`
+ 	arg=
+@@ -2094,6 +2099,15 @@
+ 	lib=
+ 	found=no
+ 	case $deplib in
++	-Wl,--as-needed)
++	  if test "$linkmode,$pass" = "prog,link"; then
++	    compile_deplibs="$deplib $compile_deplibs"
++	    finalize_deplibs="$deplib $finalize_deplibs"
++	  else
++	    deplibs="$deplib $deplibs"
++	  fi
++	  continue
++	  ;;
+ 	-mt|-mthreads|-kthread|-Kthread|-pthread|-pthreads|--thread-safe)
+ 	  if test "$linkmode,$pass" = "prog,link"; then
+ 	    compile_deplibs="$deplib $compile_deplibs"
diff --git a/eclass/ELT-patches/as-needed/1.5.26 b/eclass/ELT-patches/as-needed/1.5.26
new file mode 100644
index 000000000000..8afd6d47dbdd
--- /dev/null
+++ b/eclass/ELT-patches/as-needed/1.5.26
@@ -0,0 +1,38 @@
+--- ltmain.sh.orig	2009-04-18 16:51:52.000000000 +0200
++++ ltmain.sh	2009-04-18 16:55:05.000000000 +0200
+@@ -1812,10 +1812,15 @@
+ 	done
+ 	IFS="$save_ifs"
+ 	arg=`$echo "X$arg" | $Xsed -e "s/^ //"`
+ 	;;
+ 
++      -Wl,--as-needed)
++	deplibs="$deplibs $arg"
++	continue
++	;;
++
+       -Wl,*)
+ 	args=`$echo "X$arg" | $Xsed -e "$sed_quote_subst" -e 's/^-Wl,//'`
+ 	arg=
+ 	save_ifs="$IFS"; IFS=','
+ 	for flag in $args; do
+@@ -2152,10 +2157,19 @@
+       fi
+       for deplib in $libs; do
+ 	lib=
+ 	found=no
+ 	case $deplib in
++	-Wl,--as-needed)
++	  if test "$linkmode,$pass" = "prog,link"; then
++	    compile_deplibs="$deplib $compile_deplibs"
++	    finalize_deplibs="$deplib $finalize_deplibs"
++	  else
++	    deplibs="$deplib $deplibs"
++	  fi
++	  continue
++	  ;;
+ 	-mt|-mthreads|-kthread|-Kthread|-pthread|-pthreads|--thread-safe|-threads)
+ 	  if test "$linkmode,$pass" = "prog,link"; then
+ 	    compile_deplibs="$deplib $compile_deplibs"
+ 	    finalize_deplibs="$deplib $finalize_deplibs"
+ 	  else
diff --git a/eclass/ELT-patches/as-needed/2.2.6 b/eclass/ELT-patches/as-needed/2.2.6
new file mode 100644
index 000000000000..c56369be7606
--- /dev/null
+++ b/eclass/ELT-patches/as-needed/2.2.6
@@ -0,0 +1,38 @@
+--- ltmain.sh.orig	2009-04-18 14:37:16.000000000 +0200
++++ ltmain.sh	2009-04-18 14:40:08.000000000 +0200
+@@ -4721,10 +4721,15 @@
+ 	IFS="$save_ifs"
+ 	func_stripname ' ' '' "$arg"
+ 	arg=$func_stripname_result
+ 	;;
+ 
++      -Wl,--as-needed)
++	deplibs="$deplibs $arg"
++	continue
++	;;
++
+       -Wl,*)
+ 	func_stripname '-Wl,' '' "$arg"
+ 	args=$func_stripname_result
+ 	arg=
+ 	save_ifs="$IFS"; IFS=','
+@@ -5075,10 +5080,19 @@
+ 
+       for deplib in $libs; do
+ 	lib=
+ 	found=no
+ 	case $deplib in
++	-Wl,--as-needed)
++	  if test "$linkmode,$pass" = "prog,link"; then
++	    compile_deplibs="$deplib $compile_deplibs"
++	    finalize_deplibs="$deplib $finalize_deplibs"
++	  else
++	    deplibs="$deplib $deplibs"
++	  fi
++	  continue
++	  ;;
+ 	-mt|-mthreads|-kthread|-Kthread|-pthread|-pthreads|--thread-safe|-threads)
+ 	  if test "$linkmode,$pass" = "prog,link"; then
+ 	    compile_deplibs="$deplib $compile_deplibs"
+ 	    finalize_deplibs="$deplib $finalize_deplibs"
+ 	  else