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[2620:52:3:1:0:246e:9693:128c]) by mx.google.com with ESMTPS id sh41-20020a1709076ea900b0072f255f1708si11326261ejc.125.2022.07.23.21.40.09 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 23 Jul 2022 21:40:09 -0700 (PDT) Received-SPF: pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 2620:52:3:1:0:246e:9693:128c as permitted sender) client-ip=2620:52:3:1:0:246e:9693:128c; Authentication-Results: mx.google.com; dkim=pass header.i=@gcc.gnu.org header.s=default header.b=NEPlDglr; spf=pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 2620:52:3:1:0:246e:9693:128c as permitted sender) smtp.mailfrom="gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=gnu.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 1CE1F3857C67 for ; Sun, 24 Jul 2022 04:40:08 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 1CE1F3857C67 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1658637608; bh=XsWnCD7emsJCFZhFkdCI7HMYJOjzq+FVliA6teBNoeQ=; h=To:Subject:Date:List-Id:List-Unsubscribe:List-Archive:List-Post: List-Help:List-Subscribe:From:Reply-To:From; b=NEPlDglrEUZDpvMYzJJw57Oa2B4gD6N/Rxb3oEHt4k7XArnfkPohvS4xFhexmSBzm 9sguWtOGOsWe9Gm49nclAazq/JtwNJFLWz1JjtuhgiM0X9oAjUYHlyUWXCWEtaQVCN XqtiDsRdUStf1lW4STyLQ0TIpn410QIv9fB8EIJ0= X-Original-To: gcc-patches@gcc.gnu.org Delivered-To: gcc-patches@gcc.gnu.org Received: from smtp127.ord1c.emailsrvr.com (smtp127.ord1c.emailsrvr.com [108.166.43.127]) by sourceware.org (Postfix) with ESMTPS id 8EA9E385840A for ; Sun, 24 Jul 2022 04:39:25 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 8EA9E385840A X-Auth-ID: tom@honermann.net Received: by smtp24.relay.ord1c.emailsrvr.com (Authenticated sender: tom-AT-honermann.net) with ESMTPSA id 81BAB6010B; Sun, 24 Jul 2022 00:39:23 -0400 (EDT) To: gcc-patches@gcc.gnu.org Subject: [PATCH 0/1] c++/106423: Fix pragma suppression of -Wc++20-compat diagnostics Date: Sun, 24 Jul 2022 00:39:01 -0400 Message-Id: <20220724043902.1777378-1-tom@honermann.net> X-Mailer: git-send-email 2.32.0 MIME-Version: 1.0 X-Classification-ID: 41aea723-eb08-47ec-8fe6-68f417a64c83-1-1 X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Tom Honermann via Gcc-patches From: "Li, Pan2 via Gcc-patches" Reply-To: Tom Honermann Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org Sender: "Gcc-patches" X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1739207590455104647?= X-GMAIL-MSGID: =?utf-8?q?1739207590455104647?= This change addresses the following issue raised on the libc-alpha mailing list: https://sourceware.org/pipermail/libc-alpha/2022-July/140825.html Glibc 2.36 adds a char8_t typedef in C++ modes that do not enable the char8_t builtin type (C++17 and earlier by default; subject to _GNU_SOURCE and use of the -f[no-]char8_t option). When -Wc++20-compat diagnostics are enabled, the following warning is issued from the glibc uchar.h header. warning: identifier ‘char8_t’ is a keyword in C++20 [-Wc++20-compat] Such diagnostics are not desired from system headers, so glibc would like to suppress the diagnostic using '#pragma GCC diagnostic ignored "-Wc++20-compat"', but attempting to do so currently fails. This patch corrects that. Tom Honermann (1): c++/106423: Fix pragma suppression of -Wc++20-compat diagnostics. gcc/c-family/c-opts.cc | 7 +++++++ gcc/c-family/c.opt | 2 +- gcc/testsuite/g++.dg/cpp0x/keywords2.C | 16 ++++++++++++++++ gcc/testsuite/g++.dg/cpp2a/keywords2.C | 13 +++++++++++++ libcpp/include/cpplib.h | 4 ++++ libcpp/init.cc | 1 + 6 files changed, 42 insertions(+), 1 deletion(-) create mode 100644 gcc/testsuite/g++.dg/cpp0x/keywords2.C create mode 100644 gcc/testsuite/g++.dg/cpp2a/keywords2.C