mirror of
https://github.com/cookiengineer/audacity
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97 lines
3.0 KiB
Plaintext
97 lines
3.0 KiB
Plaintext
# ===========================================================================
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# http://autoconf-archive.cryp.to/ax_ld_check_flag.html
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_LD_CHECK_FLAG(FLAG-TO-CHECK,[PROLOGUE],[BODY],[ACTION-IF-SUCCESS],[ACTION-IF-FAILURE])
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#
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# DESCRIPTION
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#
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# This macro tests if the C++ compiler supports the flag FLAG-TO-CHECK. If
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# successfull execute ACTION-IF-SUCCESS otherwise ACTION-IF-FAILURE.
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# PROLOGUE and BODY are optional and should be used as in AC_LANG_PROGRAM
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# macro.
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#
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# Example:
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#
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# AX_LD_CHECK_FLAG([-Wl,-L/usr/lib],[],[],[
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# ...
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# ],[
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# ...
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# ])
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#
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# This code is inspired from KDE_CHECK_COMPILER_FLAG macro. Thanks to
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# Bogdan Drozdowski <bogdandr@op.pl> for testing and bug fixes.
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#
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# LAST MODIFICATION
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#
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# 2008-04-12
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#
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# COPYLEFT
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#
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# Copyright (c) 2008 Francesco Salvestrini <salvestrini@users.sourceforge.net>
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#
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# This program is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the
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# Free Software Foundation; either version 2 of the License, or (at your
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# option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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# Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# As a special exception, the respective Autoconf Macro's copyright owner
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# gives unlimited permission to copy, distribute and modify the configure
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# scripts that are the output of Autoconf when processing the Macro. You
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# need not follow the terms of the GNU General Public License when using
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# or distributing such scripts, even though portions of the text of the
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# Macro appear in them. The GNU General Public License (GPL) does govern
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# all other use of the material that constitutes the Autoconf Macro.
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#
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# This special exception to the GPL applies to versions of the Autoconf
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# Macro released by the Autoconf Macro Archive. When you make and
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# distribute a modified version of the Autoconf Macro, you may extend this
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# special exception to the GPL to apply to your modified version as well.
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AC_DEFUN([AX_LD_CHECK_FLAG],[
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AC_PREREQ([2.61])
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AC_REQUIRE([AC_PROG_CXX])
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AC_REQUIRE([AC_PROG_SED])
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flag=`echo "$1" | $SED 'y% .=/+-(){}<>:*,%_______________%'`
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AC_CACHE_CHECK([whether the linker accepts the $1 flag],
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[ax_cv_ld_check_flag_$flag],[
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#AC_LANG_PUSH([C])
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save_LDFLAGS="$LDFLAGS"
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LDFLAGS="$LDFLAGS $1"
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AC_LINK_IFELSE([
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AC_LANG_PROGRAM([$2],[$3])
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],[
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eval "ax_cv_ld_check_flag_$flag=yes"
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],[
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eval "ax_cv_ld_check_flag_$flag=no"
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])
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LDFLAGS="$save_LDFLAGS"
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#AC_LANG_POP
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])
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AS_IF([eval "test \"`echo '$ax_cv_ld_check_flag_'$flag`\" = yes"],[
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:
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$4
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],[
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:
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$5
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])
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])
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