From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BB0E6C433E6 for ; Mon, 8 Mar 2021 08:41:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7A43F651C2 for ; Mon, 8 Mar 2021 08:41:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231584AbhCHIk3 (ORCPT ); Mon, 8 Mar 2021 03:40:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37602 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231411AbhCHIkY (ORCPT ); Mon, 8 Mar 2021 03:40:24 -0500 Received: from mail-qv1-xf32.google.com (mail-qv1-xf32.google.com [IPv6:2607:f8b0:4864:20::f32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E22D9C06174A for ; Mon, 8 Mar 2021 00:40:23 -0800 (PST) Received: by mail-qv1-xf32.google.com with SMTP id 15so4202077qvp.13 for ; Mon, 08 Mar 2021 00:40:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=vt-edu.20150623.gappssmtp.com; s=20150623; h=sender:from:to:cc:subject:mime-version:date:message-id; bh=x5rG9aYCLmGpPdT1gIS00tPAzki6U9cSpND2lD2WOlM=; b=CkDWQlQ6GHdDraLv3anrBHYzX3l+GPCYPSV0Qw1GtEJd92CAiWb7nDCpLUsLX7yBn+ 3ZPSKvHK7mce8XC80tINfLyPho8B0q+gF3PlXhfl32nEO+43XejG1461q2RlK8DGjgCh bEfnfnIO9yKM3NxwUmYxxWXq+3d2c5LInbx+WVYu0VpYekAbspGB5lo3VpbZbIcjC6QD MCEXjG2G1Y59gb9Y1p+0ZF+5PT2qooat59zy0hkG2Bq2RX7QdwLslrMj3nmdQqCeAGBC ne8F4odG77YXjOcznaYmCiLUuW3oJK9cOJbpxbgbuMlO0NJ3JQIW/M3TqIOTjjAMQ/Rk 4YAw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:mime-version:date :message-id; bh=x5rG9aYCLmGpPdT1gIS00tPAzki6U9cSpND2lD2WOlM=; b=V87JtMRE0kA5L5ihLlxLedFKLSVo4TRSt+hRa8q2rPFbLwz6cBuG6BiVD3fLXMD/7C hzBiG978cN3eMrtY3IBPaxNgwn6bX1zBtte8LyrMSLxl6TLglr/NPKe2V66h+OzOjJvp Tc3GEHeQc+cjjW8GqCYRhlg6LstB0MYQoH4lQaAFbcMoZGNNwsutZgUmqtVDoKszICi7 GcnyrMGvsBxkREM/E+xFAz+SqpKPpqTHYiSyKWv8TJjbRwNCRx4ky4hqA6b8TaNMVF3k YwiZFZ172/bsowt2/gcYsBSn2Teg1s8KL4XGagU31TjxADwhrv6/gl+LDJbjH9C/uEig 5cig== X-Gm-Message-State: AOAM532a41MxcbrW3JfhM7g0lANV11F+Vqz8ZKNYLQvA+DuJXdqEX3Zd axvL7YThrSLZ4OWV2FTYpSLAfQ== X-Google-Smtp-Source: ABdhPJxBFmcaEKYvSHTfFwbk8pePy6cbeN3l05HQEeSn1CNXe4M5yc+dUSSvNLJCdcKaTMn8dkjmTw== X-Received: by 2002:a05:6214:1c45:: with SMTP id if5mr20052355qvb.9.1615192823066; Mon, 08 Mar 2021 00:40:23 -0800 (PST) Received: from turing-police ([2601:5c0:c380:d61::359]) by smtp.gmail.com with ESMTPSA id j15sm1104015qtr.34.2021.03.08.00.40.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 Mar 2021 00:40:22 -0800 (PST) Sender: Valdis Kletnieks From: "Valdis =?utf-8?Q?Kl=c4=93tnieks?=" X-Google-Original-From: "Valdis =?utf-8?Q?Kl=c4=93tnieks?=" X-Mailer: exmh version 2.9.0 11/07/2018 with nmh-1.7+dev To: Kees Cook , Josh Poimboeuf , Geert Uytterhoeven cc: linux-hardening@vger.kernel.org, Linux Kernel Mailing List Subject: [PATCH RESEND] gcc-plugins: avoid errors with -std=gnu++11 on old gcc Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Mon, 08 Mar 2021 03:40:21 -0500 Message-ID: <279558.1615192821@turing-police> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org It turns out that older gcc (4.9 and 5.4) have gnu++11 support, but due to a gcc bug fixed in gcc6, throw errors during the build. The relevant gcc bug is https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69959 Version the option based on what gcc we're using. Signed-off-by: Valdis Kletnieks Fixes: 27c287b41659 ("gcc-plugins: fix gcc 11 indigestion with plugins...") --- diff --git a/scripts/gcc-plugins/Makefile b/scripts/gcc-plugins/Makefile index b5487cce69e8..cc779973724a 100644 --- a/scripts/gcc-plugins/Makefile +++ b/scripts/gcc-plugins/Makefile @@ -21,8 +21,11 @@ always-y += $(GCC_PLUGIN) GCC_PLUGINS_DIR = $(shell $(CC) -print-file-name=plugin) +# need gnu++11 for gcc 11, but 4.9 and 5.4 need gnu++98 +GCC_FLAVOR = $(call cc-ifversion, -ge, 1100, 11, 98) + plugin_cxxflags = -Wp,-MMD,$(depfile) $(KBUILD_HOSTCXXFLAGS) -fPIC \ - -I $(GCC_PLUGINS_DIR)/include -I $(obj) -std=gnu++11 \ + -I $(GCC_PLUGINS_DIR)/include -I $(obj) -std=gnu++$(GCC_FLAVOR) \ -fno-rtti -fno-exceptions -fasynchronous-unwind-tables \ -ggdb -Wno-narrowing -Wno-unused-variable \ -Wno-format-diag