From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by finch.gentoo.org (Postfix) with ESMTPS id 56F771382C5 for ; Tue, 27 Apr 2021 18:22:38 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 722C4E0857; Tue, 27 Apr 2021 18:22:33 +0000 (UTC) Received: from smtp.gentoo.org (woodpecker.gentoo.org [IPv6:2001:470:ea4a:1:5054:ff:fec7:86e4]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id 2AB3DE07AE for ; Tue, 27 Apr 2021 18:22:33 +0000 (UTC) Date: Tue, 27 Apr 2021 19:22:27 +0100 From: Sergei Trofimovich To: gentoo-dev@lists.gentoo.org Subject: [gentoo-dev] gcc-11 enters ~arch tree Message-ID: <20210427192227.3b89875d@sf> X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.32; x86_64-pc-linux-gnu) Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-dev@lists.gentoo.org Reply-to: gentoo-dev@lists.gentoo.org X-Auto-Response-Suppress: DR, RN, NRN, OOF, AutoReply MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Archives-Salt: b7d3d7da-14cc-459e-917d-438a9c784401 X-Archives-Hash: 979b6b8621a210e45bdbf5021cde9dba Today gcc-11.1.0 released upstream and was added to ::gentoo as: https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=cc068d96fb49e308456cbe944fb29b1f78e6ad5c User-visible changes are nicely described in upstream porting doc: https://gcc.gnu.org/gcc-11/porting_to.html A few highlights I personally encountered are: - use -std=gnu++17 instead of -std=gnu++14 - ordered pointer comparison with integer (like int *p; 'p > 0') - dynamic exception specifications - gcc now enforces that comparison objects be invocable as const - header dependency changes On top of that: - -fipa-modref (enabled by default) might expose latent bugs in existing programs. -fno-ipa-modref should be a quick hack to check the hypothesis. Failures don't look widespread, thus gcc-11 should be fine to use as a default compiler. Check out known bugs and workarounds on gcc-11 tracker: https://bugs.gentoo.org/show_bug.cgi?id=gcc-11 Gentoo Toolchain wiki page for common fixes (nothing there so far): https://wiki.gentoo.org/wiki/Project:Toolchain#gcc-11 As usual if you can't figure out what is wrong with your package pull in toolchain@ to the bug and we'll get to the bottom of it. Good luck! -- Sergei