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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 59348C4361B for ; Wed, 9 Dec 2020 22:41:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 16DED23D21 for ; Wed, 9 Dec 2020 22:41:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389005AbgLIWlR (ORCPT ); Wed, 9 Dec 2020 17:41:17 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:40929 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388674AbgLIWYw (ORCPT ); Wed, 9 Dec 2020 17:24:52 -0500 Received: from mail-il1-f200.google.com ([209.85.166.200]) by youngberry.canonical.com with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1kn7rW-0008DJ-RU for netdev@vger.kernel.org; Wed, 09 Dec 2020 22:23:07 +0000 Received: by mail-il1-f200.google.com with SMTP id f19so2735015ilk.8 for ; Wed, 09 Dec 2020 14:23:06 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:mime-version :content-disposition; bh=nCPT21aBYHK+VmSNH6RsExkU8pXC3B3JSnVf9A2XUAw=; b=fm6afTUueNlsgcoNwlNlgSbKKqFVjWitXgP4ugNbXE/uZrQhQEL7NAeVDoCLmsavDT wVsJaG+HcbuNVY4dcDerRUxFroXdjQhtQ+5k+xrGa5ycilezCiAaC4nBgy6lKHII3iq8 eg7Wf5x8SuCj1nC3RbmwmYsSDUYXjTtshiz3pBcMSCw7o9SMCjo63p9gFqF07dR381L7 3MvSvzfeCPIwINilpyCFWhYHgyQqznTJbPxGqsgWihmpGTPndQ1HqrR8EsXYlia/ryvl EZkss641lKHI61w8nG9LlvhqhoJhAnSPY3vubxYajWNKJEuK4ONicRfMrFYdHlzA2wv7 Qlyw== X-Gm-Message-State: AOAM532kHm7jehnzbqV5p6pkw00QazgdVPDGi0hQe+gDsBOxBhJzn3Us MXw7JOjHVzk/4GnuWnPxzr5iKl+hgvxe9R+HTQqH147aQ8KhWJlFNE70d76RJu87MTa4H/fVUut 8DAkLYVWrZRnpBNanX3C0DByGtEUanR7xKw== X-Received: by 2002:a5d:9507:: with SMTP id d7mr5636561iom.32.1607552585835; Wed, 09 Dec 2020 14:23:05 -0800 (PST) X-Google-Smtp-Source: ABdhPJxPHEVz4M/SVZNUt1nS2IcUlOCb7v1fywa1vG7vTZjQwq6m0YhMMXsMPX3MpNt78iFWUndNBA== X-Received: by 2002:a5d:9507:: with SMTP id d7mr5636527iom.32.1607552585581; Wed, 09 Dec 2020 14:23:05 -0800 (PST) Received: from localhost ([2605:a601:ac0f:820:f6e7:e083:7e01:5905]) by smtp.gmail.com with ESMTPSA id e1sm1528753iod.17.2020.12.09.14.23.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Dec 2020 14:23:05 -0800 (PST) Date: Wed, 9 Dec 2020 16:23:04 -0600 From: Seth Forshee To: Alexei Starovoitov Cc: Daniel Borkmann , Andrii Nakryiko , linux-kselftest@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, linux-kernel@vger.kernel.org Subject: BPF selftests build failure in 5.10-rc Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Building the BPF selftests with clang 11, I'm getting the following error: CLNG-LLC [test_maps] profiler1.o In file included from progs/profiler1.c:6: progs/profiler.inc.h:260:17: error: use of unknown builtin '__builtin_preserve_enum_value' [-Wimplicit-function-declaration] int cgrp_id = bpf_core_enum_value(enum cgroup_subsys_id___local, ^ /home/ubuntu/unstable/tools/testing/selftests/bpf/tools/include/bpf/bpf_core_read.h:179:2: note: expanded from macro 'bpf_core_enum_value' __builtin_preserve_enum_value(*(typeof(enum_type) *)enum_value, BPF_ENUMVAL_VALUE) ^ 1 error generated. llc: error: llc: :1:1: error: expected top-level entity BPF obj compilation failed I see that test_core_reloc_enumval.c takes precautions around the use of __builtin_preserve_enum_value as it is currently only available in clang 12 nightlies. Is it possible to do something similar here? Though I see that the use of the builtin is not nearly so neatly localized as it is in test_core_reloc_enumval.c. Thanks, Seth