2 dnl Copyright (C) 2007, 2009-2012 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.
9 # Test whether 'malloc (0)' is handled like in GNU libc, and replace malloc if
11 AC_DEFUN([gl_FUNC_MALLOC_GNU],
13 AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
14 dnl _AC_FUNC_MALLOC_IF is defined in Autoconf.
16 [AC_DEFINE([HAVE_MALLOC_GNU], [1],
17 [Define to 1 if your system has a GNU libc compatible 'malloc'
18 function, and to 0 otherwise.])],
19 [AC_DEFINE([HAVE_MALLOC_GNU], [0])
24 # gl_FUNC_MALLOC_POSIX
25 # --------------------
26 # Test whether 'malloc' is POSIX compliant (sets errno to ENOMEM when it
27 # fails), and replace malloc if it is not.
28 AC_DEFUN([gl_FUNC_MALLOC_POSIX],
30 AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
31 AC_REQUIRE([gl_CHECK_MALLOC_POSIX])
32 if test $gl_cv_func_malloc_posix = yes; then
33 AC_DEFINE([HAVE_MALLOC_POSIX], [1],
34 [Define if the 'malloc' function is POSIX compliant.])
40 # Test whether malloc, realloc, calloc are POSIX compliant,
41 # Set gl_cv_func_malloc_posix to yes or no accordingly.
42 AC_DEFUN([gl_CHECK_MALLOC_POSIX],
44 AC_CACHE_CHECK([whether malloc, realloc, calloc are POSIX compliant],
45 [gl_cv_func_malloc_posix],
47 dnl It is too dangerous to try to allocate a large amount of memory:
48 dnl some systems go to their knees when you do that. So assume that
49 dnl all Unix implementations of the function are POSIX compliant.
53 [[#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
57 [gl_cv_func_malloc_posix=yes],
58 [gl_cv_func_malloc_posix=no])