70 lines
2.4 KiB
Plaintext
70 lines
2.4 KiB
Plaintext
|
##### http://autoconf-archive.cryp.to/ax_c___attribute__.html
|
||
|
|
#
|
||
|
|
# SYNOPSIS
|
||
|
|
#
|
||
|
|
# AX_C___ATTRIBUTE__
|
||
|
|
#
|
||
|
|
# DESCRIPTION
|
||
|
|
#
|
||
|
|
# Provides a test for the compiler support of __attribute__
|
||
|
|
# extensions. defines HAVE___ATTRIBUTE__ if it is found.
|
||
|
|
#
|
||
|
|
# Originating from the 'pork' package by Ryan McCabe <ryan@numb.org>
|
||
|
|
#
|
||
|
|
# LAST MODIFICATION
|
||
|
|
#
|
||
|
|
# 2005-01-21
|
||
|
|
#
|
||
|
|
# COPYLEFT
|
||
|
|
#
|
||
|
|
# Copyright (c) 2005 Christian Haggstrom <chm@c00.info>
|
||
|
|
#
|
||
|
|
# 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___ATTRIBUTE__], [
|
||
|
|
AC_MSG_CHECKING(for __attribute__)
|
||
|
|
AC_CACHE_VAL(ac_cv___attribute__, [
|
||
|
|
AC_TRY_COMPILE(
|
||
|
|
[#include <stdlib.h>],
|
||
|
|
[static void foo(void) __attribute__ ((unused));
|
||
|
|
static void
|
||
|
|
foo(void) {
|
||
|
|
exit(1);
|
||
|
|
}],
|
||
|
|
ac_cv___attribute__=yes,
|
||
|
|
ac_cv___attribute__=no
|
||
|
|
)])
|
||
|
|
if test "$ac_cv___attribute__" = "yes"; then
|
||
|
|
AC_DEFINE(HAVE___ATTRIBUTE__, 1, [define if your compiler has __attribute__])
|
||
|
|
fi
|
||
|
|
AC_MSG_RESULT($ac_cv___attribute__)
|
||
|
|
])
|