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- # ===========================================================================
- # https://www.gnu.org/software/autoconf-archive/ax_gcc_const_call.html
- # ===========================================================================
- #
- # SYNOPSIS
- #
- # AX_GCC_CONST_CALL
- #
- # DESCRIPTION
- #
- # The macro will compile a test program to see whether the compiler does
- # understand the per-function postfix pragma.
- #
- # LICENSE
- #
- # Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
- #
- # 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 3 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, see <https://www.gnu.org/licenses/>.
- #
- # 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 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.
-
- #serial 8
-
- AC_DEFUN([AX_GCC_CONST_CALL],[dnl
- AC_CACHE_CHECK(
- [whether the compiler supports function __attribute__((__const__))],
- ax_cv_gcc_const_call,[
- AC_TRY_COMPILE([__attribute__((__const__))
- int f(int i) { return i; }],
- [],
- ax_cv_gcc_const_call=yes, ax_cv_gcc_const_call=no)])
- if test "$ax_cv_gcc_const_call" = yes; then
- AC_DEFINE([GCC_CONST_CALL],[__attribute__((__const__))],
- [most gcc compilers know a function __attribute__((__const__))])
- fi
- ])
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