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 17B003858D3C for ; Tue, 19 Apr 2022 11:25:03 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 17B003858D3C 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-372-YKAFYCusPDC8CTHrNZ6N-g-1; Tue, 19 Apr 2022 07:24:59 -0400 X-MC-Unique: YKAFYCusPDC8CTHrNZ6N-g-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 1EAEB80159B; Tue, 19 Apr 2022 11:24:59 +0000 (UTC) Received: from oldenburg.str.redhat.com (unknown [10.39.193.187]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 01E5141047EA; Tue, 19 Apr 2022 11:24:57 +0000 (UTC) From: Florian Weimer To: Reinoud Koornstra Cc: Xi Ruoyao , Reinoud Koornstra via Gcc-help Subject: Re: Fortify_source and stack-protector-strong References: <87o82ok616.fsf@oldenburg.str.redhat.com> <2a574a7a0dbb4f1ef4472d2a43b029f0ceca9065.camel@mengyan1223.wang> <204cd10c9d34c6c798e701f1d990c120c2d77897.camel@mengyan1223.wang> Date: Tue, 19 Apr 2022 13:24:56 +0200 In-Reply-To: (Reinoud Koornstra's message of "Fri, 11 Mar 2022 11:01:05 -0800") Message-ID: <87tuap2u47.fsf@oldenburg.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.11.54.2 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-5.0 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_LOW, 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: 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: Tue, 19 Apr 2022 11:25:04 -0000 * Reinoud Koornstra: > One more question, for FORTIFY_SOURCE=2, can I use either -O1 or -O2 > optimization flags? I noticed it doesn't like -Os. Thanks, Historically, I think the expectation was that 1 should be used with -O1 and 2 with -O2. But I think the required passes run at -O1 as well. Thanks, Florian