From 655ae6b096b7ba3854159dc1eefadce91ec65550 Mon Sep 17 00:00:00 2001 From: Jan Engelhardt Date: Mon, 13 Sep 2010 16:06:50 +0200 Subject: libiptc: build with -Wl,--no-as-needed Since libiptc does not reference any symbols in libip(4|6)tc, the linker may ignore the dependencies. Use --no-as-needed to explicitly force a DT_NEEDED entry. References: http://bugzilla.netfilter.org/show_bug.cgi?id=674 Signed-off-by: Jan Engelhardt --- m4/ax_check_linker_flags.m4 | 78 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 m4/ax_check_linker_flags.m4 (limited to 'm4/ax_check_linker_flags.m4') diff --git a/m4/ax_check_linker_flags.m4 b/m4/ax_check_linker_flags.m4 new file mode 100644 index 00000000..ba7bf3cf --- /dev/null +++ b/m4/ax_check_linker_flags.m4 @@ -0,0 +1,78 @@ +#http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_check_linker_flags.m4 +# =========================================================================== +# http://www.gnu.org/software/autoconf-archive/ax_check_linker_flags.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_CHECK_LINKER_FLAGS(FLAGS, [ACTION-SUCCESS], [ACTION-FAILURE]) +# +# DESCRIPTION +# +# Check whether the given linker FLAGS work with the current language's +# linker, or whether they give an error. +# +# ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on +# success/failure. +# +# NOTE: Based on AX_CHECK_COMPILER_FLAGS. +# +# LICENSE +# +# Copyright (c) 2009 Mike Frysinger +# Copyright (c) 2009 Steven G. Johnson +# Copyright (c) 2009 Matteo Frigo +# +# This program is free software: you can redistribute it and/or modify it +# under the terms of the GNU General Public License as published by the +# Free Software Foundation, either version 3 of the License, or (at your +# option) any later version. +# +# This program is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General +# Public License for more details. +# +# You should have received a copy of the GNU General Public License along +# with this program. If not, see . +# +# As a special exception, the respective Autoconf Macro's copyright owner +# gives unlimited permission to copy, distribute and modify the configure +# scripts that are the output of Autoconf when processing the Macro. You +# need not follow the terms of the GNU General Public License when using +# or distributing such scripts, even though portions of the text of the +# Macro appear in them. The GNU General Public License (GPL) does govern +# all other use of the material that constitutes the Autoconf Macro. +# +# This special exception to the GPL applies to versions of the Autoconf +# Macro released by the Autoconf Archive. When you make and distribute a +# modified version of the Autoconf Macro, you may extend this special +# exception to the GPL to apply to your modified version as well. + +#serial 6 + +AC_DEFUN([AX_CHECK_LINKER_FLAGS], +[AC_MSG_CHECKING([whether the linker accepts $1]) +dnl Some hackery here since AC_CACHE_VAL can't handle a non-literal varname: +AS_LITERAL_IF([$1], + [AC_CACHE_VAL(AS_TR_SH(ax_cv_linker_flags_[$1]), [ + ax_save_FLAGS=$LDFLAGS + LDFLAGS="$1" + AC_LINK_IFELSE([AC_LANG_PROGRAM()], + AS_TR_SH(ax_cv_linker_flags_[$1])=yes, + AS_TR_SH(ax_cv_linker_flags_[$1])=no) + LDFLAGS=$ax_save_FLAGS])], + [ax_save_FLAGS=$LDFLAGS + LDFLAGS="$1" + AC_LINK_IFELSE([AC_LANG_PROGRAM()], + eval AS_TR_SH(ax_cv_linker_flags_[$1])=yes, + eval AS_TR_SH(ax_cv_linker_flags_[$1])=no) + LDFLAGS=$ax_save_FLAGS]) +eval ax_check_linker_flags=$AS_TR_SH(ax_cv_linker_flags_[$1]) +AC_MSG_RESULT($ax_check_linker_flags) +if test "x$ax_check_linker_flags" = xyes; then + m4_default([$2], :) +else + m4_default([$3], :) +fi +])dnl AX_CHECK_LINKER_FLAGS -- cgit v1.2.3