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Autoconf Macro: ax_c_check_flag
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<h1>
ax_c_check_flag
</h1>
<h2>
Synopsis
</h2>
<p class="indent" style="white-space:nowrap;">
<code>AX_C_CHECK_FLAG(FLAG-TO-CHECK,[PROLOGUE],[BODY],[ACTION-IF-SUCCESS],[ACTION-IF-FAILURE])</code>
</p>
<h2>
Description
</h2>
<div class="indent">
<p>
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.
</p>
<p>
This code is inspired from KDE_CHECK_COMPILER_FLAG macro. Thanks to Bogdan
Drozdowski <bogdandr@op.pl> for testing and bug fixes.
</p>
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<h2>
Author
</h2>
<p class="indent">
Francesco Salvestrini <salvestrini@users.sourceforge.net>
</p>
<h2>
Last Modified
</h2>
<p class="indent">
2007-11-26
</p>
<h2>
Cross References
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<h2>
M4 Source Code
</h2>
<div class="indent">
<pre class="m4source">
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_COMPILE_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
])
])
</pre>
</div>
<h2>
License
</h2>
<div class="indent">
<span style="white-space:nowrap;">Copyright © 2007 Francesco
Salvestrini <salvestrini@users.sourceforge.net></span>
<p>
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.
</p>
<p>
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.
</p>
<p>
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.
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As a special exception, the respective Autoconf Macro's copyright owner
gives unlimited permission to copy, distribute and modify the configure
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