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Subject: Re: libtool: update to 2.4.2?
From: "Yaakov (Cygwin/X)" <yselkowitz AT users DOT sourceforge DOT net>
To: cygwin <cygwin AT cygwin DOT com>
Date: Wed, 24 Oct 2012 20:49:40 -0500
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On Sun, 2012-10-21 at 14:32 -0500, Yaakov (Cygwin/X) wrote:
> Chuck,
> 
> Would you be able to update libtool to 2.4.2 soon?  2.4.2 adds support
> for gccgo (new to gcc 4.7) and new systems (FreeBSD 10), and an update
> would save me from having to ship different libtoolizes for each
> affected platform.

And when you do so, could you include the attached patch to ltmain.sh
(or whichever file generates it)?  The patch from Gentoo fixes handling
of -Wl,--as-needed when linking libraries by keeping it in argument
order rather than appending it to the end of the link command like other
-Wl, flags (as per the GNU ld manual, this flag only affects -l flags
which *follow* it).  This makes a big difference for Linux
cross-toolchains.


Yaakov


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From Portage eclass/ELT-patches/as-needed/2.4.2

--- a/libltdl/config/ltmain.sh	2012-08-19 10:18:57.929178597 +0200
+++ b/libltdl/config/ltmain.sh	2012-08-19 10:31:43.409388998 +0200
@@ -5798,10 +5798,15 @@
 	IFS="$save_ifs"
 	func_stripname ' ' '' "$arg"
 	arg=$func_stripname_result
 	;;
 
+      -Wl,--as-needed|-Wl,--no-as-needed)
+	deplibs="$deplibs $arg"
+	continue
+	;;
+
       -Wl,*)
 	func_stripname '-Wl,' '' "$arg"
 	args=$func_stripname_result
 	arg=
 	save_ifs="$IFS"; IFS=','
@@ -6158,10 +6163,19 @@
 
       for deplib in $libs; do
 	lib=
 	found=no
 	case $deplib in
+	-Wl,--as-needed|-Wl,--no-as-needed)
+	  if test "$linkmode,$pass" = "prog,link"; then
+	    compile_deplibs="$deplib $compile_deplibs"
+	    finalize_deplibs="$deplib $finalize_deplibs"
+	  else
+	    deplibs="$deplib $deplibs"
+	  fi
+	  continue
+	  ;;
 	-mt|-mthreads|-kthread|-Kthread|-pthread|-pthreads|--thread-safe \
         |-threads|-fopenmp|-openmp|-mp|-xopenmp|-omp|-qsmp=*)
 	  if test "$linkmode,$pass" = "prog,link"; then
 	    compile_deplibs="$deplib $compile_deplibs"
 	    finalize_deplibs="$deplib $finalize_deplibs"


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