From nobody Thu Apr 2 12:01:34 2026 Received: from mail-dl1-f41.google.com (mail-dl1-f41.google.com [74.125.82.41]) (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 289E1262A6 for ; Sun, 29 Mar 2026 18:02:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.41 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774807346; cv=none; b=caX3Iyg4mWRV+nZ60CfWT39LrO/PaA760+/qJ9sQlUBcpXraI1mK4MxOGHbrujBxJlZkg2uZTnriRrmr8teFD3gXuUEUmvdRK4gh6jeIYa6LWp80kkfNECRQTnV29TI7Y1czRcfj1OVvkcTaezYtYaI8hDBoZ+0YeCRc85svYrg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774807346; c=relaxed/simple; bh=AuUmX70YCIOL9MRwjEzUCBqZqSRfICNnhLXJj7B/f+E=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=i0NLraeMUqOiTHqbgAhxTs9JH48E0VVkxxVZC6cHx40f/Z8uMluoiYUOwbD/8sDiuUb2l8/w3c2TxncI2Yw5gtasJ1N8GIF/EK7bkrtQMidnriO/eSK6JeXD2wfTzNaipX66DPduix4Ux5A34bbBkjFc52/PSeUmlT2CDmh2m7Q= 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=Jza24isn; arc=none smtp.client-ip=74.125.82.41 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="Jza24isn" Received: by mail-dl1-f41.google.com with SMTP id a92af1059eb24-12a695044a4so5656147c88.0 for ; Sun, 29 Mar 2026 11:02:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1774807344; x=1775412144; 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=fTTMSAJlyIaJ+F3CYv2omNC1B2IyE+vrgz/y7v+evgg=; b=Jza24isnM1/wh9rHzrLN2czjXWrKa9SG3th2LVlh4Kyo+zkWLmQh6iek/2Qub+aCrY olC1sf47kFTl9arMFAQ1oXyGWtndWzabzEoSJh5ysHt0hrqHmmOkCAFupuhDCDEgqFc7 C0E9Y1kEYQU/+f/K1w4IwHyVCgNOO0BimI7Yj4NQluUGWxLe0tpCTWUM2yfCOMfxVMLn qONNv5t3cSLLaRGUJuP3Q6GoNGFmnFJk3I6WfMfJC8SxkWjRQgTq4IU+hrAvURQo6LUj RxUNlark7wgYRAMbuCTf1GBM2QBtT/v+zZiOo1xEsMBtN2mgy2xkxe2M0SWkJDLo69A6 7vzQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1774807344; x=1775412144; 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=fTTMSAJlyIaJ+F3CYv2omNC1B2IyE+vrgz/y7v+evgg=; b=T6XFD0rSN4FPh7f//s5gCr3w6nf6WIo45W25h+09qSYr0nrj1Rh+41c4+dCDyNoRTn otr9nPBXQLWlRSI47PVmVc41LtllINd31W9l3o+6GQtj5Ff2aGIOAR0UOwSI37eHlC3E ndoPt2n4/yrEkp0q1dxJQprVJGIE7tjNMwVJF8nXao/PsZpClpOTc3q7/cesYssmOumN F6LXn+SHtvW9fxoq85JN+GYjuuEJdmlAQR7dsxLaNuH3dy0zg6EMmCs5ujU91QPbmXzB f9sa7F5v+Ee5kG8k+RtZSxX/oJLaO0VAeHFsF4nllnRwOoVAV7BMs2EFtiLThHm3NlWx MTuQ== X-Forwarded-Encrypted: i=1; AJvYcCXYRUDkGw9Ua3808cFRezLvUdR2GJslY4sy8UB6dRa2v0EkFJ2sm9uDlVHg82z5LMM8Lq3Eo8b3gah3xro=@vger.kernel.org X-Gm-Message-State: AOJu0YzoXU+1ro57Wa18pf/LhK/c70sEm3RiK5aSepxgQZgXfVWYv3vH CxbgTYts1EL9I8WhVa6JpwwaLOTMXG8/j9gVCStnAVBnQSntevw0V9Zk X-Gm-Gg: ATEYQzxFSqBJsJ/5Sga9hdnUU5NI75b3t1Z+WawzxfqsPJEbIVWMnL7tOQg3+iucEVp YFti7r6HI7BLUeYWN2W23SVPaHP+R6teSrZiNoNQ5vox6FUhy7UOFw7xhwGAmJe7x3ilbWDiR0Q D4wYEShNUaGyE0qbzAdXrFonDzXJCB51b7KeIhSgaQ/q/zEVszpxPmXwnlOLVYjm3O5t1Gad/uG bBVbQchOt70WAOeDskqJuO/ukuH3mqNnaGxZkkV6n3U23Nf4tN8PYNFxqGeFl0bYAhrXZX9sAsL TlDHxTLnHJs9brRWDF2U35QGoRIx/FDlGHM4if2k7Z5elHyU5+/eOxtYf8x2ZHQ5nGX1UYrxZz/ Z7JHAklXp6qfjd8eFB8VOTIC+P/snmjJe/zkFy0bAgWPIWkq6r1mDkcchF1Ik2Xand6V7beTUTe 844B9IeUUbTwpFkcuZUoAWrblCgeu66EEQLiY= X-Received: by 2002:a05:7022:4398:b0:124:abaa:7ff2 with SMTP id a92af1059eb24-12ab28d8bc3mr6159280c88.24.1774807344130; Sun, 29 Mar 2026 11:02:24 -0700 (PDT) Received: from ArchLinux.tailb773f3.ts.net ([2605:a601:8036:8b00::5]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-12ac09e3872sm4845138c88.13.2026.03.29.11.02.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 29 Mar 2026 11:02:23 -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] kbuild: add GCC stability warning Date: Sun, 29 Mar 2026 12:02:26 -0600 Message-ID: <20260329180226.443235-1-sprowdev@gmail.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 u= se GCC 15 (or is needed.) Signed-off-by: Samuel Rowberry --- 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 =20 export KBUILD_MODULES KBUILD_BUILTIN =20 +# 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 :=3D $(shell $(CC) -dumpversion | cut -d. -f1) +ifeq ($(shell expr $(CURRENT_CC_VERSION) \>=3D 15),1) +$(warning "GCC $(CURRENT_CC_VERSION) detected. Please use GCC 11, 12, or 1= 3 for stability.") +endif +endif +endif + ifdef need-config include include/config/auto.conf endif --=20 2.53.0