From patchwork Wed Jan 4 15:56:03 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sudeep Holla X-Patchwork-Id: 89870 Delivered-To: patch@linaro.org Received: by 10.140.20.101 with SMTP id 92csp8548864qgi; Wed, 4 Jan 2017 07:56:25 -0800 (PST) X-Received: by 10.99.247.69 with SMTP id f5mr126529158pgk.81.1483545385845; Wed, 04 Jan 2017 07:56:25 -0800 (PST) Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id a96si72875111pli.233.2017.01.04.07.56.25; Wed, 04 Jan 2017 07:56:25 -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 S1031389AbdADP4R (ORCPT + 25 others); Wed, 4 Jan 2017 10:56:17 -0500 Received: from foss.arm.com ([217.140.101.70]:53840 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S967226AbdADP4O (ORCPT ); Wed, 4 Jan 2017 10:56:14 -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 605A1154D; Wed, 4 Jan 2017 07:56:13 -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 80B723F24D; Wed, 4 Jan 2017 07:56:12 -0800 (PST) From: Sudeep Holla To: linux-kernel@vger.kernel.org Cc: Sudeep Holla , Peter Zijlstra , Ingo Molnar , Jiri Olsa Subject: [PATCH v2] tools: perf: fix linker error when libelf config is disabled Date: Wed, 4 Jan 2017 15:56:03 +0000 Message-Id: <1483545363-11393-1-git-send-email-sudeep.holla@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1483537960-14499-1-git-send-email-sudeep.holla@arm.com> References: <1483537960-14499-1-git-send-email-sudeep.holla@arm.com> 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: d4dfdf00d43e ("perf jvmti: Plug compilation into perf build") Cc: Peter Zijlstra Cc: Ingo Molnar Cc: Jiri Olsa Signed-off-by: Sudeep Holla --- tools/perf/Makefile.perf | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) v1->v2: - Dropped libelf and librt as they are not required -- 2.7.4 Acked-by: Jiri Olsa 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)