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comparison m4/alloca.m4 @ 421:3c2e1f24cc7d 3.0-beta2

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Added generated files for release
author lost@l-w.ca
date Sun, 19 Sep 2010 01:33:24 -0600
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420:7366deedfa85 421:3c2e1f24cc7d
1 # alloca.m4 serial 9
2 dnl Copyright (C) 2002-2004, 2006-2007, 2009-2010 Free Software Foundation,
3 dnl Inc.
4 dnl This file is free software; the Free Software Foundation
5 dnl gives unlimited permission to copy and/or distribute it,
6 dnl with or without modifications, as long as this notice is preserved.
7
8 AC_DEFUN([gl_FUNC_ALLOCA],
9 [
10 dnl Work around a bug of AC_EGREP_CPP in autoconf-2.57.
11 AC_REQUIRE([AC_PROG_CPP])
12 AC_REQUIRE([AC_PROG_EGREP])
13
14 AC_REQUIRE([AC_FUNC_ALLOCA])
15 if test $ac_cv_func_alloca_works = no; then
16 gl_PREREQ_ALLOCA
17 fi
18
19 # Define an additional variable used in the Makefile substitution.
20 if test $ac_cv_working_alloca_h = yes; then
21 AC_CACHE_CHECK([for alloca as a compiler built-in], [gl_cv_rpl_alloca], [
22 AC_EGREP_CPP([Need own alloca], [
23 #if defined __GNUC__ || defined _AIX || defined _MSC_VER
24 Need own alloca
25 #endif
26 ], [gl_cv_rpl_alloca=yes], [gl_cv_rpl_alloca=no])
27 ])
28 if test $gl_cv_rpl_alloca = yes; then
29 dnl OK, alloca can be implemented through a compiler built-in.
30 AC_DEFINE([HAVE_ALLOCA], [1],
31 [Define to 1 if you have 'alloca' after including <alloca.h>,
32 a header that may be supplied by this distribution.])
33 ALLOCA_H=alloca.h
34 else
35 dnl alloca exists as a library function, i.e. it is slow and probably
36 dnl a memory leak. Don't define HAVE_ALLOCA in this case.
37 ALLOCA_H=
38 fi
39 else
40 ALLOCA_H=alloca.h
41 fi
42 AC_SUBST([ALLOCA_H])
43 ])
44
45 # Prerequisites of lib/alloca.c.
46 # STACK_DIRECTION is already handled by AC_FUNC_ALLOCA.
47 AC_DEFUN([gl_PREREQ_ALLOCA], [:])