From patchwork Wed Dec 11 17:07:08 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Simon Marchi (Code Review)" X-Patchwork-Id: 36720 Received: (qmail 47845 invoked by alias); 11 Dec 2019 17:07:14 -0000 Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sourceware.org Delivered-To: mailing list gdb-patches@sourceware.org Received: (qmail 47836 invoked by uid 89); 11 Dec 2019 17:07:14 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-21.6 required=5.0 tests=AWL, BAYES_00, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, KAM_SHORT autolearn=ham version=3.3.1 spammy= X-HELO: mx1.osci.io Received: from polly.osci.io (HELO mx1.osci.io) (8.43.85.229) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Wed, 11 Dec 2019 17:07:12 +0000 Received: by mx1.osci.io (Postfix, from userid 994) id 5B1DF20172; Wed, 11 Dec 2019 12:07:11 -0500 (EST) Received: from gnutoolchain-gerrit.osci.io (gnutoolchain-gerrit.osci.io [8.43.85.239]) by mx1.osci.io (Postfix) with ESMTP id 14ED5202EB; Wed, 11 Dec 2019 12:07:10 -0500 (EST) Received: from localhost (localhost [127.0.0.1]) by gnutoolchain-gerrit.osci.io (Postfix) with ESMTP id AE39F20AF6; Wed, 11 Dec 2019 12:07:09 -0500 (EST) X-Gerrit-PatchSet: 3 Date: Wed, 11 Dec 2019 12:07:08 -0500 From: "Luis Machado (Code Review)" To: gdb-patches@sourceware.org Cc: Pedro Alves Auto-Submitted: auto-generated X-Gerrit-MessageType: newpatchset Subject: [review v3] Fix unused function error X-Gerrit-Change-Id: Iad6123d61d76d111e3ef8d24aa8c60112304c749 X-Gerrit-Change-Number: 753 X-Gerrit-ChangeURL: X-Gerrit-Commit: 198971b447296fd4f56d4802cb59e2620732383c In-Reply-To: References: Reply-To: luis.machado@linaro.org, palves@redhat.com, gdb-patches@sourceware.org MIME-Version: 1.0 Content-Disposition: inline User-Agent: Gerrit/3.0.3-79-g83ff7f88f1 Message-Id: <20191211170709.AE39F20AF6@gnutoolchain-gerrit.osci.io> Change URL: https://gnutoolchain-gerrit.osci.io/r/c/binutils-gdb/+/753 ...................................................................... Fix unused function error Attempting to build GDB in Ubuntu 16.04.6 LTS on x86_64, I ran into warnings that caused the build to fail: binutils-gdb/gdb/gdbsupport/safe-strerror.c:44:1: error: ‘char* select_strerror_r(char*, char*)’ defined but not used [-Werror=unused-function] select_strerror_r (char *res, char *) The diagnostics macros seem to expand correctly to their respective pragmas, but it doesn't seem to have an effect on the warning. I tried to use the pragmas explicitly and got the same result. ATTRIBUTE_UNUSED works fine in this case, if you put it in both functions, which should fix warnings for both gdb and gdbserver builds. The compiler version is gcc (Ubuntu 5.4.0-6ubuntu1~16.04.11) 5.4.0 20160609. gdb/ChangeLog: 2019-12-11 Luis Machado * gdb/gdbsupport/safe-strerror.c: Remove diagnostics.h (select_strerror_r): Use ATTRIBUTE_UNUSED instead of the diagnostics macros. Change-Id: Iad6123d61d76d111e3ef8d24aa8c60112304c749 --- M gdb/gdbsupport/safe-strerror.c 1 file changed, 2 insertions(+), 7 deletions(-) diff --git a/gdb/gdbsupport/safe-strerror.c b/gdb/gdbsupport/safe-strerror.c index 9973fa6..9126507 100644 --- a/gdb/gdbsupport/safe-strerror.c +++ b/gdb/gdbsupport/safe-strerror.c @@ -18,7 +18,6 @@ along with this program. If not, see . */ #include "common-defs.h" -#include "diagnostics.h" #include /* There are two different versions of strerror_r; one is GNU-specific, the @@ -29,25 +28,21 @@ /* We only ever use one of the two overloads, so suppress the warning for an unused function. */ -DIAGNOSTIC_PUSH -DIAGNOSTIC_IGNORE_UNUSED_FUNCTION /* Called if we have a XSI-compliant strerror_r. */ -static char * +ATTRIBUTE_UNUSED static char * select_strerror_r (int res, char *buf) { return res == 0 ? buf : nullptr; } /* Called if we have a GNU strerror_r. */ -static char * +ATTRIBUTE_UNUSED static char * select_strerror_r (char *res, char *) { return res; } -DIAGNOSTIC_POP - /* Implementation of safe_strerror as defined in common-utils.h. */ const char *