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| 1 # malloc.m4 serial 8 |
| 2 dnl Copyright (C) 2007 Free Software Foundation, Inc. |
| 3 dnl This file is free software; the Free Software Foundation |
| 4 dnl gives unlimited permission to copy and/or distribute it, |
| 5 dnl with or without modifications, as long as this notice is preserved. |
| 6 |
| 7 # gl_FUNC_MALLOC_POSIX |
| 8 # -------------------- |
| 9 # Test whether 'malloc' is POSIX compliant (sets errno to ENOMEM when it |
| 10 # fails), and replace malloc if it is not. |
| 11 AC_DEFUN([gl_FUNC_MALLOC_POSIX], |
| 12 [ |
| 13 AC_REQUIRE([gl_CHECK_MALLOC_POSIX]) |
| 14 if test $gl_cv_func_malloc_posix = yes; then |
| 15 HAVE_MALLOC_POSIX=1 |
| 16 AC_DEFINE([HAVE_MALLOC_POSIX], 1, |
| 17 [Define if the 'malloc' function is POSIX compliant.]) |
| 18 else |
| 19 AC_LIBOBJ([malloc]) |
| 20 HAVE_MALLOC_POSIX=0 |
| 21 fi |
| 22 AC_SUBST([HAVE_MALLOC_POSIX]) |
| 23 ]) |
| 24 |
| 25 # Test whether malloc, realloc, calloc are POSIX compliant, |
| 26 # Set gl_cv_func_malloc_posix to yes or no accordingly. |
| 27 AC_DEFUN([gl_CHECK_MALLOC_POSIX], |
| 28 [ |
| 29 AC_CACHE_CHECK([whether malloc, realloc, calloc are POSIX compliant], |
| 30 [gl_cv_func_malloc_posix], |
| 31 [ |
| 32 dnl It is too dangerous to try to allocate a large amount of memory: |
| 33 dnl some systems go to their knees when you do that. So assume that |
| 34 dnl all Unix implementations of the function are POSIX compliant. |
| 35 AC_TRY_COMPILE([], |
| 36 [#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ |
| 37 choke me |
| 38 #endif |
| 39 ], [gl_cv_func_malloc_posix=yes], [gl_cv_func_malloc_posix=no]) |
| 40 ]) |
| 41 ]) |
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