Autoconf guarantees that AC_CHECK_DECLS_ONCE always defines the
corresponding HAVE_DECL_*, so checking #ifndef HAVE_DECL_* is bogus.
https://lists.gnu.org/archive/html/coreutils/2012-06/msg00037.html
* m4/strndup.m4 (gl_FUNC_STRNDUP): HAVE_DECL_STRNDUP is always
defined, to either 0 or 1.
Reported by Karel Zak.
Signed-off-by: Eric Blake <eblake@redhat.com>
+2012-07-13 Eric Blake <eblake@redhat.com>
+
+ strndup: fix m4 usage error
+ * m4/strndup.m4 (gl_FUNC_STRNDUP): HAVE_DECL_STRNDUP is always
+ defined, to either 0 or 1.
+ Reported by Karel Zak.
+
2012-07-11 Jim Meyering <meyering@redhat.com>
maint: enable the sc_avoid_if_before_free syntax-check rule
-# strndup.m4 serial 20
+# strndup.m4 serial 21
dnl Copyright (C) 2002-2003, 2005-2012 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
[AC_RUN_IFELSE([
AC_LANG_PROGRAM([[#include <string.h>
#include <stdlib.h>]], [[
-#ifndef HAVE_DECL_STRNDUP
+#if !HAVE_DECL_STRNDUP
extern
#ifdef __cplusplus
"C"