# Check whether free (NULL) is supposed to work.
-# Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+# Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_FREE],
[
- AC_CHECK_HEADERS_ONCE(unistd.h)
AC_CACHE_CHECK([whether free (NULL) is known to work],
[gl_cv_func_free],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
- [[@%:@if HAVE_UNISTD_H
- @%:@include <unistd.h>
- @%:@endif]],
+ [[@%:@include <unistd.h>]],
[[@%:@if _POSIX_VERSION < 199009L && \
(defined unix || defined _unix || defined _unix_ \
|| defined __unix || defined __unix__)