projects / bison.git / blame
| Commit | Line | Data |
|---|---|---|
| f61aad93 PE |
1 | # alloca.m4 serial 2 |
| 2 | dnl Copyright (C) 2002-2003 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. | |
| 8 | ||
| 9 | AC_DEFUN([gl_FUNC_ALLOCA], | |
| 10 | [ | |
| 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]) | |
| 14 | ||
| 15 | AC_REQUIRE([AC_FUNC_ALLOCA]) | |
| 16 | if test $ac_cv_func_alloca_works = no; then | |
| 17 | gl_PREREQ_ALLOCA | |
| 18 | fi | |
| 19 | ||
| 20 | # Define an additional variable used in the Makefile substitution. | |
| 21 | ||
| 22 | AC_EGREP_CPP([Need own alloca], [ | |
| 23 | #if defined __GNUC__ || defined _MSC_VER || !HAVE_ALLOCA_H | |
| 24 | Need own alloca | |
| 25 | #endif | |
| 26 | ], | |
| 27 | ALLOCA_H=alloca.h, | |
| 28 | ALLOCA_H=) | |
| 29 | AC_SUBST([ALLOCA_H]) | |
| 30 | ]) | |
| 31 | ||
| 32 | # Prerequisites of lib/alloca.c. | |
| 33 | # STACK_DIRECTION is already handled by AC_FUNC_ALLOCA. | |
| 34 | AC_DEFUN([gl_PREREQ_ALLOCA], [ | |
| 35 | AC_CHECK_HEADERS_ONCE(stdlib.h string.h) | |
| 36 | ]) |