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 [216.205.24.124]) by sourceware.org (Postfix) with ESMTP id BF1C13857012 for ; Sat, 24 Oct 2020 17:06:27 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org BF1C13857012 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-593-wEG_EnNlNqqJfAuZ5iwL5Q-1; Sat, 24 Oct 2020 13:06:23 -0400 X-MC-Unique: wEG_EnNlNqqJfAuZ5iwL5Q-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 E2C8F1006CB1; Sat, 24 Oct 2020 17:06:22 +0000 (UTC) Received: from oldenburg2.str.redhat.com (ovpn-112-47.ams2.redhat.com [10.36.112.47]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 2C35210013C0; Sat, 24 Oct 2020 17:06:22 +0000 (UTC) From: Florian Weimer To: mark_at_yahoo via Gcc-help Subject: Re: __attribute__ to selectively disable -Wmaybe-uninitialized References: Date: Sat, 24 Oct 2020 19:06:20 +0200 In-Reply-To: (mark at yahoo via Gcc-help's message of "Fri, 23 Oct 2020 13:01:13 -0700") Message-ID: <87ft63ft9v.fsf@oldenburg2.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-6.3 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, KAM_SHORT, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H4, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: gcc-help@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-help mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 24 Oct 2020 17:06:29 -0000 * mark at yahoo via Gcc-help: > The necessity to add many of these pragmas makes the code difficult to > read. Is there a variable attribute that could be used instead, > something like: > char *buffer __attribute__((uninitialized)); In the past, this has been suggested as an official way to suppress the warning: char *buffer = buffer; See for an example. It has the downside that it is almost certainly not valid C++ and probably not valid C, either. Thanks, Florian -- Red Hat GmbH, https://de.redhat.com/ , Registered seat: Grasbrunn, Commercial register: Amtsgericht Muenchen, HRB 153243, Managing Directors: Charles Cachera, Brian Klemm, Laurie Krebs, Michael O'Neill