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1 # malloc.m4 serial 8
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2 dnl Copyright (C) 2007 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
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7 # gl_FUNC_MALLOC_POSIX
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8 # --------------------
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9 # Test whether 'malloc' is POSIX compliant (sets errno to ENOMEM when it
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10 # fails), and replace malloc if it is not.
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11 AC_DEFUN([gl_FUNC_MALLOC_POSIX],
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12 [
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13 AC_REQUIRE([gl_CHECK_MALLOC_POSIX])
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14 if test $gl_cv_func_malloc_posix = yes; then
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15 HAVE_MALLOC_POSIX=1
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16 AC_DEFINE([HAVE_MALLOC_POSIX], 1,
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17 [Define if the 'malloc' function is POSIX compliant.])
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18 else
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19 AC_LIBOBJ([malloc])
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20 HAVE_MALLOC_POSIX=0
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21 fi
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22 AC_SUBST([HAVE_MALLOC_POSIX])
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23 ])
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24
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25 # Test whether malloc, realloc, calloc are POSIX compliant,
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26 # Set gl_cv_func_malloc_posix to yes or no accordingly.
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27 AC_DEFUN([gl_CHECK_MALLOC_POSIX],
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28 [
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29 AC_CACHE_CHECK([whether malloc, realloc, calloc are POSIX compliant],
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30 [gl_cv_func_malloc_posix],
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31 [
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32 dnl It is too dangerous to try to allocate a large amount of memory:
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33 dnl some systems go to their knees when you do that. So assume that
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34 dnl all Unix implementations of the function are POSIX compliant.
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35 AC_TRY_COMPILE([],
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36 [#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
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37 choke me
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38 #endif
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39 ], [gl_cv_func_malloc_posix=yes], [gl_cv_func_malloc_posix=no])
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40 ])
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41 ])
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