-# realloc.m4 serial 8
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+# realloc.m4 serial 11
+dnl Copyright (C) 2007, 2009-2011 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
+# gl_FUNC_REALLOC_GNU
+# -------------------
+# Test whether 'realloc (0, 0)' is handled like in GNU libc, and replace
+# realloc if it is not.
+AC_DEFUN([gl_FUNC_REALLOC_GNU],
+[
+ AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+ dnl _AC_FUNC_REALLOC_IF is defined in Autoconf.
+ _AC_FUNC_REALLOC_IF(
+ [AC_DEFINE([HAVE_REALLOC_GNU], [1],
+ [Define to 1 if your system has a GNU libc compatible 'realloc'
+ function, and to 0 otherwise.])],
+ [AC_DEFINE([HAVE_REALLOC_GNU], [0])
+ gl_REPLACE_REALLOC
+ ])
+])# gl_FUNC_REALLOC_GNU
+
# gl_FUNC_REALLOC_POSIX
-# --------------------
+# ---------------------
# Test whether 'realloc' is POSIX compliant (sets errno to ENOMEM when it
# fails), and replace realloc if it is not.
AC_DEFUN([gl_FUNC_REALLOC_POSIX],
[
- AC_CACHE_CHECK([whether malloc, realloc, calloc are POSIX compliant],
- [gl_cv_func_malloc_posix],
- [
- dnl It is too dangerous to try to allocate a large amount of memory:
- dnl some systems go to their knees when you do that. So assume that
- dnl all Unix implementations of the function are POSIX compliant.
- AC_TRY_COMPILE([],
- [#if !((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__)
- choke me
- #endif
- ], [gl_cv_func_malloc_posix=yes], [gl_cv_func_malloc_posix=no])
- ])
+ AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+ AC_REQUIRE([gl_CHECK_MALLOC_POSIX])
if test $gl_cv_func_malloc_posix = yes; then
- HAVE_REALLOC_POSIX=1
- AC_DEFINE([HAVE_REALLOC_POSIX], 1,
+ AC_DEFINE([HAVE_REALLOC_POSIX], [1],
[Define if the 'realloc' function is POSIX compliant.])
else
- AC_LIBOBJ([realloc])
- HAVE_REALLOC_POSIX=0
+ gl_REPLACE_REALLOC
fi
- AC_SUBST([HAVE_REALLOC_POSIX])
+])
+
+AC_DEFUN([gl_REPLACE_REALLOC],
+[
+ AC_LIBOBJ([realloc])
+ REPLACE_REALLOC=1
])