2 dnl Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
3 dnl This file is free software, distributed under the terms of the GNU
4 dnl General Public License. As a special exception to the GNU General
5 dnl Public License, this file may be distributed as part of a program
6 dnl that contains a configuration script generated by Autoconf, under
7 dnl the same distribution terms as the rest of that program.
9 AC_DEFUN([gl_FUNC_ALLOCA],
11 dnl Work around a bug of AC_EGREP_CPP in autoconf-2.57.
12 AC_REQUIRE([AC_PROG_CPP])
13 AC_REQUIRE([AC_PROG_EGREP])
15 AC_REQUIRE([AC_FUNC_ALLOCA])
16 if test $ac_cv_func_alloca_works = no; then
20 # Define an additional variable used in the Makefile substitution.
21 if test $ac_cv_working_alloca_h = yes; then
22 AC_EGREP_CPP([Need own alloca], [
23 #if defined __GNUC__ || defined _AIX || defined _MSC_VER
27 [AC_DEFINE(HAVE_ALLOCA, 1,
28 [Define to 1 if you have `alloca' after including <alloca.h>,
29 a header that may be supplied by this distribution.])
37 AC_DEFINE(HAVE_ALLOCA_H, 1,
38 [Define HAVE_ALLOCA_H for backward compatibility with older code
39 that includes <alloca.h> only if HAVE_ALLOCA_H is defined.])
42 # Prerequisites of lib/alloca.c.
43 # STACK_DIRECTION is already handled by AC_FUNC_ALLOCA.
44 AC_DEFUN([gl_PREREQ_ALLOCA], [:])