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* m4/alloca.m4 (gl_FUNC_ALLOCA): Use AC_CACHE_CHECK to avoid a random "(cached)" in configure output.
author Eric Blake <ebb9@byu.net>
date Wed, 15 Nov 2006 18:13:04 +0000
parents a0dfb5334b53
children 8c905c6c16a0
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7659
e2febe678452 * m4/alloca.m4 (gl_FUNC_ALLOCA): Use AC_CACHE_CHECK to avoid a
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1 # alloca.m4 serial 7
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2 dnl Copyright (C) 2002-2004, 2006 Free Software Foundation, Inc.
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3 dnl This file is free software; the Free Software Foundation
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4 dnl gives unlimited permission to copy and/or distribute it,
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5 dnl with or without modifications, as long as this notice is preserved.
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6
7c1a6b73f48e An autoconf macro for its associated module.
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7 AC_DEFUN([gl_FUNC_ALLOCA],
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8 [
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9 dnl Work around a bug of AC_EGREP_CPP in autoconf-2.57.
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10 AC_REQUIRE([AC_PROG_CPP])
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11 AC_REQUIRE([AC_PROG_EGREP])
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12
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13 AC_REQUIRE([AC_FUNC_ALLOCA])
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14 if test $ac_cv_func_alloca_works = no; then
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15 gl_PREREQ_ALLOCA
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16 fi
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17
99ea86c79f44 Make it possibly to simply write: #include <alloca.h>.
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18 # Define an additional variable used in the Makefile substitution.
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19 if test $ac_cv_working_alloca_h = yes; then
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20 AC_CACHE_CHECK([whether alloca must be replaced], [gl_cv_rpl_alloca], [
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21 AC_EGREP_CPP([Need own alloca], [
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22 #if defined __GNUC__ || defined _AIX || defined _MSC_VER
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23 Need own alloca
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24 #endif
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25 ], [gl_cv_rpl_alloca=yes], [gl_cv_rpl_alloca=no])
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26 ])
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27 if test $gl_cv_rpl_alloca = yes; then
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28 AC_DEFINE([HAVE_ALLOCA], 1,
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29 [Define to 1 if you have `alloca' after including <alloca.h>,
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30 a header that may be supplied by this distribution.])
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31 ALLOCA_H=alloca.h
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32 else
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33 ALLOCA_H=
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34 fi
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35 else
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36 ALLOCA_H=alloca.h
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37 fi
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38 AC_SUBST([ALLOCA_H])
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39
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40 AC_DEFINE(HAVE_ALLOCA_H, 1,
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41 [Define HAVE_ALLOCA_H for backward compatibility with older code
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42 that includes <alloca.h> only if HAVE_ALLOCA_H is defined.])
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43 ])
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44
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45 # Prerequisites of lib/alloca.c.
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46 # STACK_DIRECTION is already handled by AC_FUNC_ALLOCA.
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47 AC_DEFUN([gl_PREREQ_ALLOCA], [:])