alloca.m4
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alloca.m4
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	# alloca.m4 serial 5
	dnl Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
	dnl This file is free software; the Free Software Foundation
	dnl gives unlimited permission to copy and/or distribute it,
	dnl with or without modifications, as long as this notice is preserved.

	AC_DEFUN([gl_FUNC_ALLOCA],
	[
	dnl Work around a bug of AC_EGREP_CPP in autoconf-2.57.
	AC_REQUIRE([AC_PROG_CPP])
	AC_REQUIRE([AC_PROG_EGREP])

	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.
	if test $ac_cv_working_alloca_h = yes; then
	AC_EGREP_CPP([Need own alloca], [
	#if defined __GNUC__ \|\| defined _AIX \|\| defined _MSC_VER
	Need own alloca
	#endif
	],
	[AC_DEFINE(HAVE_ALLOCA, 1,
	[Define to 1 if you have `alloca' after including <alloca.h>,
	a header that may be supplied by this distribution.])
	ALLOCA_H=alloca.h],
	[ALLOCA_H=])
	else
	ALLOCA_H=alloca.h
	fi
	AC_SUBST([ALLOCA_H])

	AC_DEFINE(HAVE_ALLOCA_H, 1,
	[Define HAVE_ALLOCA_H for backward compatibility with older code
	that includes <alloca.h> only if HAVE_ALLOCA_H is defined.])
	])

	# Prerequisites of lib/alloca.c.
	# STACK_DIRECTION is already handled by AC_FUNC_ALLOCA.
	AC_DEFUN([gl_PREREQ_ALLOCA], [:])