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=-6.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 D771AC433DF for ; Fri, 3 Jul 2020 14:38:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B46552070B for ; Fri, 3 Jul 2020 14:38:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="ZXXzV4G4" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726147AbgGCOix (ORCPT ); Fri, 3 Jul 2020 10:38:53 -0400 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:21614 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726035AbgGCOix (ORCPT ); Fri, 3 Jul 2020 10:38:53 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1593787131; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=A4SNg/veuGUGeQ/9H0uknMrOgPhRtVROAG/gdjJq4Sk=; b=ZXXzV4G4rPHaktenP262jIYgfWQlIJWkEMEvW41naVGMq0k2zFLpTeT/0jED0sa+W8eAKv LulzAv2xrBBj3wV95L7hURN74hjIqO8ei5K3GM77p6mFBMSVc5TqbR9aHKqwuXbMzhqYFY jbj9+sqaSj7gk9QjQr7SqA26jUhzvhM= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-461-o9PVE-C9MtiG7FVWoGrILw-1; Fri, 03 Jul 2020 10:38:46 -0400 X-MC-Unique: o9PVE-C9MtiG7FVWoGrILw-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 20CAE107ACCA; Fri, 3 Jul 2020 14:38:45 +0000 (UTC) Received: from carbon (unknown [10.40.208.4]) by smtp.corp.redhat.com (Postfix) with ESMTP id 33A227BD58; Fri, 3 Jul 2020 14:38:39 +0000 (UTC) Date: Fri, 3 Jul 2020 16:38:37 +0200 From: Jesper Dangaard Brouer To: BPF-dev-list , Song Liu Cc: brouer@redhat.com, Daniel Borkmann , Alexei Starovoitov , Andrii Nakryiko , Yonghong Song Subject: Build errors in tools/testing/selftests/bpf/ at 046cc3dd9a25 Message-ID: <20200703163837.0611d26a@carbon> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Hi Song, I' getting this compile error in tools/testing/selftests/bpf/ on bpf-next git tree with HEAD 046cc3dd9a25 ("bpf: Fix build without CONFIG_STACKTRACE"): $ pwd /home/jbrouer/git/kernel/bpf-next/tools/testing/selftests/bpf $ make Warning: Kernel ABI header at 'tools/include/uapi/linux/netlink.h' differs from latest version at 'include/uapi/linux/netlink.h' Warning: Kernel ABI header at 'tools/include/uapi/linux/if_link.h' differs from latest version at 'include/uapi/linux/if_link.h' INSTALL headers GEN-SKEL [test_progs] bpf_iter_task_stack.skel.h libbpf: invalid relo for 'entries' in special section 0xfff2; forgot to initialize global var?.. Error: failed to open BPF object file: 0 make: *** [Makefile:372: /home/jbrouer/git/kernel/bpf-next/tools/testing/selftests/bpf/bpf_iter_task_stack.skel.h] Error 255 make: *** Deleting file '/home/jbrouer/git/kernel/bpf-next/tools/testing/selftests/bpf/bpf_iter_task_stack.skel.h' If I revert c7568114bc56 ("selftests/bpf: Add bpf_iter test with bpf_get_task_stack()") (Author: Song Liu) then it compiles again. -- Best regards, Jesper Dangaard Brouer MSc.CS, Principal Kernel Engineer at Red Hat LinkedIn: http://www.linkedin.com/in/brouer More details: $ clang --version clang version 10.0.0 (https://github.com/llvm/llvm-project.git 90c78073f73eac58f4f8b4772a896dc8aac023bc) Target: x86_64-unknown-linux-gnu Thread model: posix InstalledDir: /usr/local/bin llc --version LLVM (http://llvm.org/): LLVM version 10.0.0git Optimized build. Default target: x86_64-unknown-linux-gnu Host CPU: ivybridge Registered Targets: bpf - BPF (host endian) bpfeb - BPF (big endian) bpfel - BPF (little endian) x86 - 32-bit X86: Pentium-Pro and above x86-64 - 64-bit X86: EM64T and AMD64 make V=1 (clang -g -D__TARGET_ARCH_x86 -mlittle-endian -I/home/jbrouer/git/kernel/bpf-next/tools/testing/selftests/bpf/tools/include -I/home/jbrouer/git/kernel/bpf-next/tools/testing/selftests/bpf -I/home/jbrouer/git/kernel/bpf-next/tools/include/uapi -I/home/jbrouer/git/kernel/bpf-next/tools/testing/selftests/usr/include -idirafter /usr/local/include -idirafter /usr/local/stow/llvm-10.0.0-rc2/lib/clang/10.0.0/include -idirafter /usr/include -Wno-compare-distinct-pointer-types -O2 -target bpf -emit-llvm -c progs/bpf_iter_task_stack.c -o - || echo "BPF obj compilation failed") | llc -mattr=dwarfris -march=bpf -mcpu=v3 -mattr=+alu32 -filetype=obj -o /home/jbrouer/git/kernel/bpf-next/tools/testing/selftests/bpf/bpf_iter_task_stack.o /home/jbrouer/git/kernel/bpf-next/tools/testing/selftests/bpf/tools/sbin/bpftool gen skeleton /home/jbrouer/git/kernel/bpf-next/tools/testing/selftests/bpf/bpf_iter_task_stack.o > /home/jbrouer/git/kernel/bpf-next/tools/testing/selftests/bpf/bpf_iter_task_stack.skel.h libbpf: invalid relo for 'entries' in special section 0xfff2; forgot to initialize global var?.. Error: failed to open BPF object file: 0 make: *** [Makefile:372: /home/jbrouer/git/kernel/bpf-next/tools/testing/selftests/bpf/bpf_iter_task_stack.skel.h] Error 255 make: *** Deleting file '/home/jbrouer/git/kernel/bpf-next/tools/testing/selftests/bpf/bpf_iter_task_stack.skel.h'