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Diffstat (limited to 'm4/ax_gcc_malloc_call.m4')
| -rw-r--r-- | m4/ax_gcc_malloc_call.m4 | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/m4/ax_gcc_malloc_call.m4 b/m4/ax_gcc_malloc_call.m4 new file mode 100644 index 0000000..65b5b1d --- /dev/null +++ b/m4/ax_gcc_malloc_call.m4 @@ -0,0 +1,56 @@ +# =========================================================================== +# http://autoconf-archive.cryp.to/ax_gcc_malloc_call.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_GCC_MALLOC_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 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, see <http://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. + +AC_DEFUN([AX_GCC_MALLOC_CALL],[dnl +AC_CACHE_CHECK( + [whether the compiler supports function __attribute__((__malloc__))], + ax_cv_gcc_malloc_call,[ + AC_TRY_COMPILE([__attribute__((__malloc__)) + int f(int i) { return i; }], + [], + ax_cv_gcc_malloc_call=yes, ax_cv_gcc_malloc_call=no)]) + if test "$ax_cv_gcc_malloc_call" = yes; then + AC_DEFINE([GCC_MALLOC_CALL],[__attribute__((__malloc__))], + [most gcc compilers know a function __attribute__((__malloc__))]) + fi +]) |