From patchwork Tue Sep 1 15:20:43 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Thomas Huth X-Patchwork-Id: 274902 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=-10.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED 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 C8230C433E6 for ; Tue, 1 Sep 2020 15:33:18 +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 8F602214D8 for ; Tue, 1 Sep 2020 15:33:18 +0000 (UTC) Authentication-Results: mail.kernel.org; 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Tue, 1 Sep 2020 15:20:56 +0000 (UTC) Received: from thuth.com (ovpn-112-188.ams2.redhat.com [10.36.112.188]) by smtp.corp.redhat.com (Postfix) with ESMTP id 18E965D9CC; Tue, 1 Sep 2020 15:20:54 +0000 (UTC) From: Thomas Huth To: qemu-devel@nongnu.org, Peter Maydell Subject: [PULL 1/8] configure: Fix atomic64 test for --enable-werror on macOS Date: Tue, 1 Sep 2020 17:20:43 +0200 Message-Id: <20200901152050.255165-2-thuth@redhat.com> In-Reply-To: <20200901152050.255165-1-thuth@redhat.com> References: <20200901152050.255165-1-thuth@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=thuth@redhat.com X-Mimecast-Spam-Score: 0.002 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/31 23:17:53 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=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: , Cc: Ed Maste , Li-Wen Hsu Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" When using --enable-werror for the macOS builders in the Cirrus-CI, the atomic64 test is currently failing, and config.log shows a bunch of error messages like this: config-temp/qemu-conf.c:6:7: error: implicit declaration of function '__atomic_load_8' is invalid in C99 [-Werror,-Wimplicit-function-declaration] y = __atomic_load_8(&x, 0); ^ config-temp/qemu-conf.c:6:7: error: this function declaration is not a prototype [-Werror,-Wstrict-prototypes] Seems like these __atomic_*_8 functions are available in one of the libraries there, so that the test links and passes there when not using --enable-werror. But there does not seem to be a valid prototype for them in any of the header files, so that the test fails when using --enable-werror. Fix it by using the "official" built-in functions instead (see e.g. https://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html). We are not using the *_8 variants in QEMU anyway. Suggested-by: Christian Schoenebeck Reviewed-by: Christian Schoenebeck Reviewed-by: Alex Bennée Tested-by: Alex Bennée Message-Id: <20200728074405.13118-2-thuth@redhat.com> Signed-off-by: Thomas Huth --- configure | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/configure b/configure index 8dc981684b..59b7310e15 100755 --- a/configure +++ b/configure @@ -5780,11 +5780,11 @@ int main(void) { uint64_t x = 0, y = 0; #ifdef __ATOMIC_RELAXED - y = __atomic_load_8(&x, 0); - __atomic_store_8(&x, y, 0); - __atomic_compare_exchange_8(&x, &y, x, 0, 0, 0); - __atomic_exchange_8(&x, y, 0); - __atomic_fetch_add_8(&x, y, 0); + y = __atomic_load_n(&x, __ATOMIC_RELAXED); + __atomic_store_n(&x, y, __ATOMIC_RELAXED); + __atomic_compare_exchange_n(&x, &y, x, 0, __ATOMIC_RELAXED, __ATOMIC_RELAXED); + __atomic_exchange_n(&x, y, __ATOMIC_RELAXED); + __atomic_fetch_add(&x, y, __ATOMIC_RELAXED); #else typedef char is_host64[sizeof(void *) >= sizeof(uint64_t) ? 1 : -1]; __sync_lock_test_and_set(&x, y);