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https://github.com/cookiengineer/audacity
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91 lines
2.9 KiB
Plaintext
91 lines
2.9 KiB
Plaintext
##### http://autoconf-archive.cryp.to/ax_cxxcpp_check_flag.html
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#
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# SYNOPSIS
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#
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# AX_CXXCPP_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++ preprocessor supports the flag
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# FLAG-TO-CHECK. If successfull execute ACTION-IF-SUCCESS otherwise
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# ACTION-IF-FAILURE. PROLOGUE and BODY are optional and should be
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# used as in AC_LANG_PROGRAM macro.
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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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# 2007-11-26
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#
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# COPYLEFT
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#
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# Copyright (c) 2007 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
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; either version 2 of the
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# License, or (at your 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
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# General 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
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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# 02111-1307, USA.
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#
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# As a special exception, the respective Autoconf Macro's copyright
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# owner gives unlimited permission to copy, distribute and modify the
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# configure scripts that are the output of Autoconf when processing
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# the Macro. You need not follow the terms of the GNU General Public
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# License when using or distributing such scripts, even though
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# portions of the text of the Macro appear in them. The GNU General
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# Public License (GPL) does govern all other use of the material that
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# constitutes the Autoconf Macro.
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#
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# This special exception to the GPL applies to versions of the
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# Autoconf Macro released by the Autoconf Macro Archive. When you
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# make and distribute a modified version of the Autoconf Macro, you
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# may extend this special exception to the GPL to apply to your
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# modified version as well.
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AC_DEFUN([AX_CXXCPP_CHECK_FLAG],[
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AC_PREREQ([2.61])
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AC_REQUIRE([AC_PROG_CXXCPP])
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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 C++ preprocessor accepts the $1 flag],
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[ax_cv_cxxcpp_check_flag_$flag],[
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AC_LANG_PUSH([C++])
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save_CXXFLAGS="$CXXFLAGS"
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CXXFLAGS="$CXXFLAGS $1"
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AC_PREPROC_IFELSE([
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AC_LANG_PROGRAM([$2],[$3])
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],[
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eval "ax_cv_cxxcpp_check_flag_$flag=yes"
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],[
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eval "ax_cv_cxxcpp_check_flag_$flag=no"
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])
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CXXFLAGS="$save_CXXFLAGS"
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AC_LANG_POP
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])
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AS_IF([eval "test \"`echo '$ax_cv_cxxcpp_check_flag_'$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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