From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by sourceware.org (Postfix) with ESMTPS id CC367386EC15 for ; Wed, 23 Mar 2022 10:12:30 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org CC367386EC15 Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-54-CSOTmnsaMm-l2VQIKeGROA-1; Wed, 23 Mar 2022 06:12:27 -0400 X-MC-Unique: CSOTmnsaMm-l2VQIKeGROA-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id D997B1044562; Wed, 23 Mar 2022 10:12:26 +0000 (UTC) Received: from localhost (unknown [10.33.36.3]) by smtp.corp.redhat.com (Postfix) with ESMTP id A0A3E565DD9; Wed, 23 Mar 2022 10:12:26 +0000 (UTC) From: Jonathan Wakely To: libstdc++@gcc.gnu.org, gcc-patches@gcc.gnu.org Cc: Thomas Rodgers Subject: [committed] libstdc++: Disable atomic wait for freestanding [PR105021] Date: Wed, 23 Mar 2022 10:12:26 +0000 Message-Id: <20220323101226.915908-1-jwakely@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.85 on 10.11.54.9 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII"; x-default=true X-Spam-Status: No, score=-12.3 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H5, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_NONE, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: libstdc++@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libstdc++ mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 23 Mar 2022 10:12:32 -0000 Tested powerpc64le-linux, pushed to trunk. Backport to gcc-11 needed too. -- >8 -- We use either condition variables or futexes to implement atomic waits, so we can't do it in freestanding. This is non-conforming, so should be revisited later, probably by making freestanding atomic waiting operations spin without ever blocking. Reviewed-by: Thomas Rodgers libstdc++-v3/ChangeLog: PR libstdc++/105021 * include/bits/atomic_base.h [!_GLIBCXX_HOSTED]: Do not include for freestanding. --- libstdc++-v3/include/bits/atomic_base.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libstdc++-v3/include/bits/atomic_base.h b/libstdc++-v3/include/bits/atomic_base.h index d86766cf39b..2cad8486c69 100644 --- a/libstdc++-v3/include/bits/atomic_base.h +++ b/libstdc++-v3/include/bits/atomic_base.h @@ -37,7 +37,7 @@ #include #include -#if __cplusplus > 201703L +#if __cplusplus > 201703L && _GLIBCXX_HOSTED #include #endif -- 2.34.1