From patchwork Tue Sep 18 16:50:35 2012
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Subject: libbacktrace patch committed: Fix test of HAVE_DECL_STRNLEN
Date: Tue, 18 Sep 2012 06:50:35 -0000
From: Ian Taylor <iant@google.com>
X-Patchwork-Id: 184760
Message-Id: <mcr4nmvp95w.fsf@google.com>
To: gcc-patches@gcc.gnu.org

I foolishly assumed that the autoconf macro AC_CHECK_DECLS worked like
most autoconf macros, and did not define HAVE_DECL_xx when the
declaration is not available.  However, it turns out that it actually
#defines it to 0.  This patch fixes the test of HAVE_DECL_STRNLEN to
match that behaviour.  Bootstrapped and ran libbacktrace testsuite on
x86_64-unknown-linux-gnu.  Committed to mainline.

Ian


2012-09-18  Ian Lance Taylor  <iant@google.com>

	* dwarf.c: Correct test of HAVE_DECL_STRNLEN.


Index: dwarf.c
===================================================================
--- dwarf.c	(revision 191433)
+++ dwarf.c	(working copy)
@@ -44,7 +44,7 @@ POSSIBILITY OF SUCH DAMAGE.  */
 #include "backtrace.h"
 #include "internal.h"
 
-#ifndef HAVE_DECL_STRNLEN
+#if !defined(HAVE_DECL_STRNLEN) || !HAVE_DECL_STRNLEN
 /* The function is defined in libiberty if needed.  */
 extern size_t strnlen (const char *, size_t);
 #endif