-# realloc.m4 serial 7
-dnl Copyright (C) 2002 Free Software Foundation, Inc.
-dnl This file is free software, distributed under the terms of the GNU
-dnl General Public License. As a special exception to the GNU General
-dnl Public License, this file may be distributed as part of a program
-dnl that contains a configuration script generated by Autoconf, under
-dnl the same distribution terms as the rest of that program.
+# 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.
-dnl From Jim Meyering.
-dnl Determine whether realloc works when both arguments are 0.
-dnl If it doesn't, arrange to use the replacement function.
+# 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
-AC_DEFUN([jm_FUNC_REALLOC],
+# 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_REQUIRE([AC_FUNC_REALLOC])
- dnl autoconf < 2.57 used the symbol ac_cv_func_realloc_works.
- if test X"$ac_cv_func_realloc_0_nonnull" = Xno || test X"$ac_cv_func_realloc_works" = Xno; then
- gl_PREREQ_REALLOC
+ AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+ AC_REQUIRE([gl_CHECK_MALLOC_POSIX])
+ if test $gl_cv_func_malloc_posix = yes; then
+ AC_DEFINE([HAVE_REALLOC_POSIX], [1],
+ [Define if the 'realloc' function is POSIX compliant.])
+ else
+ gl_REPLACE_REALLOC
fi
])
-# Prerequisites of lib/realloc.c.
-AC_DEFUN([gl_PREREQ_REALLOC], [
- :
+AC_DEFUN([gl_REPLACE_REALLOC],
+[
+ AC_LIBOBJ([realloc])
+ REPLACE_REALLOC=1
])