# alloca.m4 serial 4 dnl Copyright (C) 2002, 2003, 2004 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], [ 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], [:])