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##### http://autoconf-archive.cryp.to/ax_cxx_check_flag.html
#
# SYNOPSIS
#
# AX_CXX_CHECK_FLAG(FLAG-TO-CHECK,[PROLOGUE],[BODY],[ACTION-IF-SUCCESS],[ACTION-IF-FAILURE])
#
# DESCRIPTION
#
# This macro tests if the C++ compiler supports the flag
# FLAG-TO-CHECK. If successfull execute ACTION-IF-SUCCESS otherwise
# ACTION-IF-FAILURE. PROLOGUE and BODY are optional and should be
# used as in AC_LANG_PROGRAM macro.
#
# This code is inspired from KDE_CHECK_COMPILER_FLAG macro. Thanks to
# Bogdan Drozdowski <bogdandr@op.pl> for testing and bug fixes.
#
# LAST MODIFICATION
#
# 2007-11-26
#
# COPYLEFT
#
# Copyright (c) 2007 Francesco Salvestrini <salvestrini@users.sourceforge.net>
#
# 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 2 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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
#
# 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 Macro 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.
AC_DEFUN([AX_CXX_CHECK_FLAG],[
AC_PREREQ([2.61])
AC_REQUIRE([AC_PROG_CXX])
AC_REQUIRE([AC_PROG_SED])
flag=`echo "$1" | $SED 'y% .=/+-(){}<>:*,%_______________%'`
AC_CACHE_CHECK([whether the C++ compiler accepts the $1 flag],
[ax_cv_cxx_check_flag_$flag],[
AC_LANG_PUSH([C++])
save_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$CXXFLAGS $1"
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([$2],[$3])
],[
eval "ax_cv_cxx_check_flag_$flag=yes"
],[
eval "ax_cv_cxx_check_flag_$flag=no"
])
CXXFLAGS="$save_CXXFLAGS"
AC_LANG_POP
])
AS_IF([eval "test \"`echo '$ax_cv_cxx_check_flag_'$flag`\" = yes"],[
:
$4
],[
:
$5
])
])
|
