From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932144AbbCRXME (ORCPT ); Wed, 18 Mar 2015 19:12:04 -0400 Received: from mail-pd0-f177.google.com ([209.85.192.177]:36301 "EHLO mail-pd0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753576AbbCRXMB (ORCPT ); Wed, 18 Mar 2015 19:12:01 -0400 From: Vinson Lee To: Peter Zijlstra , Paul Mackerras , Ingo Molnar , Arnaldo Carvalho de Melo , Jiri Olsa , Adrian Hunter , Masami Hiramatsu , Namhyung Kim , Yann Droneaud Cc: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Vinson Lee Subject: [PATCH v2] perf tools: Work around lack of sched_getcpu in glibc < 2.6. Date: Wed, 18 Mar 2015 16:11:52 -0700 Message-Id: <1426720316-7470-1-git-send-email-vlee@twopensource.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <20150318091527.GM23123@twins.programming.kicks-ass.net> References: <20150318091527.GM23123@twins.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Vinson Lee This patch fixes this build error with glibc < 2.6. CC util/cloexec.o cc1: warnings being treated as errors util/cloexec.c: In function ‘perf_flag_probe’: util/cloexec.c:24: error: implicit declaration of function ‘sched_getcpu’ util/cloexec.c:24: error: nested extern declaration of ‘sched_getcpu’ make: *** [util/cloexec.o] Error 1 Cc: stable@vger.kernel.org # 3.18+ Signed-off-by: Vinson Lee --- tools/perf/util/cloexec.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/tools/perf/util/cloexec.c b/tools/perf/util/cloexec.c index 6da965b..285bd70 100644 --- a/tools/perf/util/cloexec.c +++ b/tools/perf/util/cloexec.c @@ -7,6 +7,16 @@ static unsigned long flag = PERF_FLAG_FD_CLOEXEC; +#ifdef __GLIBC_PREREQ +#if !__GLIBC_PREREQ(2, 6) +static int sched_getcpu(void) +{ + errno = ENOSYS; + return -1; +} +#endif +#endif + static int perf_flag_probe(void) { /* use 'safest' configuration as used in perf_evsel__fallback() */ -- 1.8.2.1