From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EFF97C33CB2 for ; Thu, 30 Jan 2020 02:09:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BC703206F0 for ; Thu, 30 Jan 2020 02:09:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=fb.com header.i=@fb.com header.b="AltwyslT" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726647AbgA3CJl (ORCPT ); Wed, 29 Jan 2020 21:09:41 -0500 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:60082 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726632AbgA3CJl (ORCPT ); Wed, 29 Jan 2020 21:09:41 -0500 Received: from pps.filterd (m0044010.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 00U25Rrr026709 for ; Wed, 29 Jan 2020 18:09:40 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : mime-version : content-type; s=facebook; bh=Wve3vdg/Xj7dM3IcXA1CuHaJmAn1D0qlflZfMFTggbg=; b=AltwyslTL6YrbtM4Ja2Z7OmB/uPDsaf1V5n5ZSDxAE+WUHTO08KpOqOhhEFp3BwNteLs rocBRucYJ2T3Ozg1yF6uXwa2+AD/4aA7BvplLA+JPAHqp2YjidLBBUP5HVHLIHuy9P9v WYSbrkp4XaWa1mbM+SSYH3U2NbAmE0rD/O8= Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com with ESMTP id 2xufqk9ryq-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Wed, 29 Jan 2020 18:09:40 -0800 Received: from intmgw002.41.prn1.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:83::4) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1779.2; Wed, 29 Jan 2020 18:09:38 -0800 Received: by devvm4065.prn2.facebook.com (Postfix, from userid 125878) id 35FAA435722AB; Wed, 29 Jan 2020 18:09:32 -0800 (PST) Smtp-Origin-Hostprefix: devvm From: Yulia Kartseva Smtp-Origin-Hostname: devvm4065.prn2.facebook.com To: , , , , CC: Smtp-Origin-Cluster: prn2c23 Subject: [PATCH bpf 0/1] runqslower: fix Makefile Date: Wed, 29 Jan 2020 18:09:05 -0800 Message-ID: X-Mailer: git-send-email 2.17.1 X-FB-Internal: Safe MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-01-29_08:2020-01-28,2020-01-29 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 malwarescore=0 phishscore=0 impostorscore=0 spamscore=0 lowpriorityscore=0 adultscore=0 clxscore=1011 mlxlogscore=896 suspectscore=8 mlxscore=0 bulkscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1911200001 definitions=main-2001300012 X-FB-Internal: deliver Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org From: Julia Kartseva Fix undefined reference linker errors when building runqslower with gcc 7.4.0 on Ubuntu 18.04. The issue is with misplaced -lelf, -lz options in Makefile: $(Q)$(CC) $(CFLAGS) -lelf -lz $^ -o $@ -lelf, -lz options should follow the list of target dependencies: $(Q)$(CC) $(CFLAGS) $^ -lelf -lz -o $@ or after substitution cc -g -Wall runqslower.o libbpf.a -lelf -lz -o runqslower The current order of gcc params causes failure in libelf symbols resolution, e.g. undefined reference to `elf_memory' Julia Kartseva (1): runqslower: fix Makefile tools/bpf/runqslower/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) -- 2.17.1