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# alloca.m4 serial 2
dnl Copyright (C) 2002-2003 Free Software Foundation, Inc.
dnl This file is free software, distributed under the terms of the GNU
dnl General Public License. As a special exception to the GNU General
dnl Public License, this file may be distributed as part of a program
dnl that contains a configuration script generated by Autoconf, under
dnl the same distribution terms as the rest of that program.
AC_DEFUN([gl_FUNC_ALLOCA],
[
AC_REQUIRE([AC_FUNC_ALLOCA])
if test $ac_cv_func_alloca_works = no; then
gl_PREREQ_ALLOCA
fi
# Define an additional variable used in the Makefile substitution.
AC_EGREP_CPP([Need own alloca], [
#if defined __GNUC__ || defined _MSC_VER || !HAVE_ALLOCA_H
Need own alloca
#endif
],
ALLOCA_H=alloca.h,
ALLOCA_H=)
AC_SUBST([ALLOCA_H])
])
# Prerequisites of lib/alloca.c.
# STACK_DIRECTION is already handled by AC_FUNC_ALLOCA.
AC_DEFUN([gl_PREREQ_ALLOCA], [
AC_CHECK_HEADERS_ONCE(stdlib.h string.h)
])
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