From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-dy1-f178.google.com (mail-dy1-f178.google.com [74.125.82.178]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 54EB8257845 for ; Sun, 29 Mar 2026 19:21:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.178 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774812096; cv=none; b=R8wXAmJtISlqPPX5fzWu0veVXuCUH7yeRYIQw04DksaGbTtijO/s2QRFEAWj36sdS6nUX4Fc32BHN+M5PrWvJIAEzkvmsq2KHAPZuSNUriZLAositb9c24JFw/8X0oJwQvAdF/6oyKM2VeCxFZvfUA+vtEwyiD/KdQPo8FpsTw8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774812096; c=relaxed/simple; bh=jV3iaHpTosSMIydvmTERG01SKw6JPNciVHzZ6sCKDI0=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=QtKPkrXFVSRKx1+fI+riLMobsgaAS1+WYaZAC0JQG3cPNipepY3epzatQ4NO4bEjNpdFbrqDQ6PxGsYvAmiVlE63uSYMSQ6EDx5cUNPUFGo55WBUaYWuPBwq28iM0VrO3OMOudN9f8GjdnDx4Fp1JSG8BdBL3sHayBxjf8MMU4s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=VYY61hmF; arc=none smtp.client-ip=74.125.82.178 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="VYY61hmF" Received: by mail-dy1-f178.google.com with SMTP id 5a478bee46e88-2c156c4a9efso3577692eec.1 for ; Sun, 29 Mar 2026 12:21:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1774812094; x=1775416894; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=NloHPFKXhPjXUmqlsaHtaANu4HcMUU4znEIX3tQ8dTI=; b=VYY61hmFPMmzuIpAKJfZZ5BK7DQvyQ3f2WpJHo7yKyu+zSb1RV0rUmXpVkRUmn4cDq 73gstW2D9fMsrkWnK8ncVdth8GqxHZVO/Vh+hYFJMlWJp7YBQgTC4YnZwHo7/mh6fKpI O7mDSo1VkKw4v1SxQql1uGCHONEkfoK7owGSewtNY2ExzjSAavfn6HMEnLgsgfaDgRcE 9I65+OYARxRSZIm64LP7qU5WZ16BzGGGceO66Fa4Kp0Y7ckLyZ1CjSro3YyjuKyrSMx6 6NLB47RUpN7iBwOIG9bzSDsZFwrBevG7z/GSDhUHBJcrUTZ1US6zsEXkfFHAg/1WGHsq rqOg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1774812094; x=1775416894; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=NloHPFKXhPjXUmqlsaHtaANu4HcMUU4znEIX3tQ8dTI=; b=etYGt8y5VUoWBGlZ2VyhCl2B4XCgmPpsKYPl99Flam1RuoGzJU1kgMACmXlerlOu6Y n7OIlKBPbfoyDFRjgu5+L4YZrjqkHeYWlcODrVjPVxJiVpZkZaPGp8dMjjq/g+z0y1Ma PHHj0L22zKI6yOY7OXl5S1D/F3H6RSXUUVjDzwDzR50uVhAxkGzTvd5vJAVSB3u7q1L1 hCrIlme/SCLTqKG6X2FIqaRQ8FDwKCRKosnqZMd5/7PJr1JtMg1CRm9hc7SgAD7ia4jy Iszy8ZaV7TpXsrh6D6oz+sk/oznVnOL5znMa49Bex/cSFCWQVAhsGVrUrBu7uT6v3CNG ol8A== X-Forwarded-Encrypted: i=1; AJvYcCUuu+7W8pn0m7XHFrM94aK9NBfp7jP8M3PiCOwQL6CWnT5y679QTVdLmh6ZJJqHghv+2LjkVQvQM7Ao/SE=@vger.kernel.org X-Gm-Message-State: AOJu0YyaUCSbA5MyV6WZp9XqYnMqLi2YJkiPxuYv2iOJ9kok100Qt0LJ mfw8i1P9T729aazRwoQMeHqUS4jKMGrK+e3anr9V3BiPQpOYYteIpIfQSnXIOA== X-Gm-Gg: ATEYQzym9JyjLTCO/OGikZj/BviJAKv5RbdwEC5EJ8NgXgXAymM+rMxj6Ge6t8WI1hU 8uS83FLxlcyhv21JPouidFsJZqdw8v/zTvNORfLmk7ShJki+dizaVEYYf/N+U5Sfag5fusE/nB1 S7km4m5IlsgVa+opCJa0obKFGBE2D5nQCh1q7abxpYhceju8fuyCThVUAwqtuitryRFKmXwlbzB eMzx1QA3U5ycgy2OW3AQneMVMY649c5KQDt5EBGQH0UyyHRZcpO2IK91ath5cnPeY6svCMaf3Fd d6sBzAsQc4lizy4+/XnpYA9VwXB1jjJ1E3k8c69dcW8f8lyyWNm/6SakZxW6g0XBuGndKAa+UeP DCxADUYruVAaMpbzfYkTtNqQTP21ELANr4GqUQKLsrS7P/AbY7uQ3psY/VxrDtgko0Lr88BeNRW ww/BLonVfd1ZzmbnM2du1XoVgr X-Received: by 2002:a05:7022:90f:b0:128:ce44:be90 with SMTP id a92af1059eb24-12ab28edf14mr4938800c88.28.1774812094397; Sun, 29 Mar 2026 12:21:34 -0700 (PDT) Received: from ArchLinux.tailb773f3.ts.net ([2605:a601:8036:8b00::5]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-12abbe21787sm4892108c88.11.2026.03.29.12.21.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 29 Mar 2026 12:21:33 -0700 (PDT) From: Samuel Rowberry To: masahiroy@kernel.org Cc: nathan@kernel.org, nicolas@fjasle.eu, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, Samuel Rowberry Subject: [PATCH v2] kbuild: add GCC stability warning Date: Sun, 29 Mar 2026 13:21:39 -0600 Message-ID: <20260329192139.475926-1-sprowdev@gmail.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-kbuild@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Newer GCC versions are not fully compatible with the code. Adding a warning lets users know without getting in the way of setups where it is okay to use GCC 15 (or is needed.) Signed-off-by: Samuel Rowberry --- v2: - Fixed line wrapping in commit desc Makefile | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/Makefile b/Makefile index 02902bcae..361b5a509 100644 --- a/Makefile +++ b/Makefile @@ -720,6 +720,19 @@ endif export KBUILD_MODULES KBUILD_BUILTIN +# Version check on demand because configs can get stale +# This check is GCC-only because that is standard +# and if someone is using a custom setup, then it is +# assumed that their setup works. +ifeq ($(KBUILD_BUILTIN)$(KBUILD_MODULES),11) +ifneq ($(findstring GCC,$(CC_VERSION_TEXT)),) +CURRENT_CC_VERSION := $(shell $(CC) -dumpversion | cut -d. -f1) +ifeq ($(shell expr $(CURRENT_CC_VERSION) \>= 15),1) +$(warning "GCC $(CURRENT_CC_VERSION) detected. Please use GCC 11, 12, or 13 for stability.") +endif +endif +endif + ifdef need-config include include/config/auto.conf endif -- 2.53.0