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Diffstat (limited to 'm4/ax_c_check_flag.m4')
| -rw-r--r-- | m4/ax_c_check_flag.m4 | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/m4/ax_c_check_flag.m4 b/m4/ax_c_check_flag.m4 new file mode 100644 index 0000000..68daeb3 --- /dev/null +++ b/m4/ax_c_check_flag.m4 @@ -0,0 +1,92 @@ +##### http://autoconf-archive.cryp.to/ax_c_check_flag.html +# +# SYNOPSIS +# +# +AX_C_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_C_CHECK_FLAG],[ + AC_PREREQ([2.61]) + AC_REQUIRE([AC_PROG_CC]) + AC_REQUIRE([AC_PROG_SED]) + + flag=`echo "$1" | $SED 'y% .=/+-(){}<>:*,%_______________%'` + + AC_CACHE_CHECK([whether the C compiler accepts the $1 flag], + [ax_cv_c_check_flag_$flag],[ + + AC_LANG_PUSH([C]) + + save_CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS $1" + + AC_LINK_IFELSE([ + AC_LANG_PROGRAM([$2],[$3]) + ],[ + eval "ax_cv_c_check_flag_$flag=yes" + ],[ + eval "ax_cv_c_check_flag_$flag=no" + ]) + + CFLAGS="$save_CFLAGS" + + AC_LANG_POP + + ]) + + AS_IF([eval "test \"`echo '$ax_cv_c_check_flag_'$flag`\" = yes"],[ + : + $4 + ],[ + : + $5 + ]) +]) |