From patchwork Tue Jan 10 10:22:49 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sudeep Holla X-Patchwork-Id: 90669 Delivered-To: patch@linaro.org Received: by 10.182.3.34 with SMTP id 2csp959343obz; Tue, 10 Jan 2017 02:23:07 -0800 (PST) X-Received: by 10.98.33.131 with SMTP id o3mr348775pfj.86.1484043787544; Tue, 10 Jan 2017 02:23:07 -0800 (PST) Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id b82si1683664pfe.235.2017.01.10.02.23.07; Tue, 10 Jan 2017 02:23:07 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760051AbdAJKXE (ORCPT + 25 others); Tue, 10 Jan 2017 05:23:04 -0500 Received: from foss.arm.com ([217.140.101.70]:47702 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754015AbdAJKXD (ORCPT ); Tue, 10 Jan 2017 05:23:03 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 52F3EC14; Tue, 10 Jan 2017 02:23:02 -0800 (PST) Received: from e107155-lin.cambridge.arm.com (unknown [10.1.210.28]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 2D87B3F3D6; Tue, 10 Jan 2017 02:23:01 -0800 (PST) From: Sudeep Holla To: linux-kernel@vger.kernel.org, Arnaldo Carvalho de Melo Cc: Sudeep Holla , Jiri Olsa , Peter Zijlstra , Ingo Molnar , Stephane Eranian Subject: [PATCH 1/2] tools: perf: fix linker error when libelf config is disabled Date: Tue, 10 Jan 2017 10:22:49 +0000 Message-Id: <1484043770-13206-1-git-send-email-sudeep.holla@arm.com> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When libelf is disabled in the configuration, we get the following linker error: LINK libperf-jvmti.so ld: cannot find -lelf Makefile.perf:515: recipe for target 'libperf-jvmti.so' failed Jiri pointed out that both librt and libelf are not really required. So this patch fixes the linker error by getting rid of unwanted libraries in the linker stage. Fixes: 209045adc2bb ("perf tools: add JVMTI agent library") Acked-by: Jiri Olsa Cc: Peter Zijlstra Cc: Ingo Molnar Cc: Stephane Eranian Signed-off-by: Sudeep Holla --- tools/perf/Makefile.perf | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) -- 2.7.4 diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index 8fc24824705e..9e4a7ea84637 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -512,7 +512,7 @@ $(LIBJVMTI_IN): FORCE $(Q)$(MAKE) -f $(srctree)/tools/build/Makefile.build dir=jvmti obj=jvmti $(OUTPUT)$(LIBJVMTI): $(LIBJVMTI_IN) - $(QUIET_LINK)$(CC) -shared -Wl,-soname -Wl,$(LIBJVMTI) -o $@ $< -lelf -lrt + $(QUIET_LINK)$(CC) -shared -Wl,-soname -Wl,$(LIBJVMTI) -o $@ $< endif $(patsubst perf-%,%.o,$(PROGRAMS)): $(wildcard */*.h)