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=-7.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 7BF99C07E97 for ; Sat, 3 Jul 2021 14:37:06 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CC5136193A for ; Sat, 3 Jul 2021 14:37:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CC5136193A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:55388 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lzglU-0003G7-Sq for qemu-devel@archiver.kernel.org; Sat, 03 Jul 2021 10:37:04 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41020) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lzgkd-0002bW-G7 for qemu-devel@nongnu.org; Sat, 03 Jul 2021 10:36:11 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:46571) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lzgkZ-0002Kb-OW for qemu-devel@nongnu.org; Sat, 03 Jul 2021 10:36:10 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1625322966; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=x6WBYmsB4ww+crJEk5DacNmMl6S1l8nFqyvaAboQSNQ=; b=cVDQ+dQDVuhsxGF3XZ4pXYKMrcc2veDmDSDmbKMbMT25zg21+PJcDOyzxz1x1n9RfLjMqt 3eIVDSCvQu0xYfNRUUZYpGnmJnTMkRkUfqjLDYPiJlyQMhH+vO/Sy75AFe6ipcBCU4j8zv 5mYvSWQe1SqR1McL1H48ibdVb4lrgEQ= 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-178-h8M6-FM3MJadZqpCqyHRlQ-1; Sat, 03 Jul 2021 10:34:58 -0400 X-MC-Unique: h8M6-FM3MJadZqpCqyHRlQ-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 2C0C7800C60 for ; Sat, 3 Jul 2021 14:34:57 +0000 (UTC) Received: from [10.10.112.221] (ovpn-112-221.rdu2.redhat.com [10.10.112.221]) by smtp.corp.redhat.com (Postfix) with ESMTP id E3BE310074FC for ; Sat, 3 Jul 2021 14:34:56 +0000 (UTC) From: Cole Robinson Subject: clang build error on i686 To: qemu-devel Message-ID: Date: Sat, 3 Jul 2021 10:34:56 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=crobinso@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Language: en-US Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=170.10.133.124; envelope-from=crobinso@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.377, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Hi, I'm hitting build errors with clang on i686 userspace on x86_64 kernel. Affects both qemu 6.0.0 and qemu.git, tested with fedora clang-12.0.1~rc3-1.fc35.i686. Full build log from the 6.0.0 build: https://gist.githubusercontent.com/crobinso/7b1206044eac7326490b2adce829e861/raw/9dddef968051fd6383ba7adb9e595081ad4f8fa4/gistfile1.txt Lots of errors like: /usr/bin/ld: libqemu-aarch64-softmmu.fa.p/accel_tcg_cputlb.c.o: in function `helper_atomic_cmpxchgq_le_mmu': /builddir/build/BUILD/qemu-6.0.0/accel/tcg/atomic_template.h:86: undefined reference to `__atomic_compare_exchange_8' /usr/bin/ld: libqemu-aarch64-softmmu.fa.p/accel_tcg_cputlb.c.o: in function `helper_atomic_xchgq_le_mmu': /builddir/build/BUILD/qemu-6.0.0/accel/tcg/atomic_template.h:134: undefined reference to `__atomic_exchange_8' Also warnings like: /builddir/build/BUILD/qemu-6.0.0/include/qemu/stats64.h:58:21: warning: misaligned atomic operation may incur significant performance penalty; the expected alignment (8 bytes) exceeds the actual alignment (4 bytes) [-Watomic-alignment] uint64_t orig = qatomic_read__nocheck(&s->value); ^ /builddir/build/BUILD/qemu-6.0.0/include/qemu/atomic.h:129:5: note: expanded from macro 'qatomic_read__nocheck' __atomic_load_n(ptr, __ATOMIC_RELAXED) Search the log for __atomic for other hits. Thanks, Cole