From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9E25F367F34; Fri, 13 Feb 2026 16:30:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771000252; cv=none; b=FHzPiFNXTYIOMyMunAnJRybZa9kk1CMpDxz+4RB6M39Wc74Tt2D2TA9s4FLkXmrimlHWQ6in8gzIUgXzRFb+xIRq71EaCAnbSc/XgfYhPUvVLx0Rwh/A7YvPLzNSlpjcbtjlNuu/LtFBmlsgebY6bIQa+VlzIKWzBwwX8uVKtes= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771000252; c=relaxed/simple; bh=Gtme98yYBXDzgA1k3jxuG0sCM/Kywo6qD70kXxCyBp0=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=VkBBD7xvshkNAgkLR5Le9/Qyn1FHCfYBsxKGlysB6w/Sht+fwE6soIFY7ZleXKWRRxgltF8TZmsVX3GrZMTGOCJlvRQGF8ni28ZfvnnuMrwY7M0vEapl7tNwMeUmxH3/aBha2izbjwU9lM1Mp8OhfadXmA1z+rAAnwPIkkBu2sM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=HInFHK2i; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="HInFHK2i" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BCB62C116C6; Fri, 13 Feb 2026 16:30:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1771000252; bh=Gtme98yYBXDzgA1k3jxuG0sCM/Kywo6qD70kXxCyBp0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=HInFHK2iAwlS2FB6SQOWljb7QJ2JSh3koeGNVc2zOmaqGs6P2Zg05zttSWbneF30y jLf8Up5P1z/ULI0ejLTVd9cchZFmY5UNXPDVwcjFjxY5xB1/NSpMEBp1Yzdd7sFxyJ v+UuE8iW71BvHSH7R8OaE5Fa1XFQ0WC8A/eYE3DE8dHjBJbZTmNEiBdHHboWq7w5z0 hkHefeulkcLXm+fjSpGUMlRS2u+eju2Ub0lFN7OT8O0VDnHSXfwZ2Czd/1Nh0iNzPF QFm7+ZIIzJmnVYDE+a8TcE64qH3S6gdo8GRH26QEtfo7mgH0T7+s3TVyKD3Y/iicVq 8Oq++zwOLQUnQ== Date: Fri, 13 Feb 2026 17:29:26 +0100 From: Nicolas Schier To: =?iso-8859-1?Q?Micka=EBl_Sala=FCn?= Cc: linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@cloudflare.com, Nathan Chancellor , Thomas =?iso-8859-1?Q?Wei=DFschuh?= , stable@vger.kernel.org Subject: Re: [PATCH v1] kbuild: Fix CC_CAN_LINK detection Message-ID: Mail-Followup-To: Nicolas Schier , =?iso-8859-1?Q?Micka=EBl_Sala=FCn?= , linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@cloudflare.com, Nathan Chancellor , Thomas =?iso-8859-1?Q?Wei=DFschuh?= , stable@vger.kernel.org References: <20260212133544.1331437-1-mic@digikod.net> Precedence: bulk X-Mailing-List: linux-kbuild@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20260212133544.1331437-1-mic@digikod.net> On Thu, Feb 12, 2026 at 02:35:43PM +0100, Mickaël Salaün wrote: > Most samples cannot be build on some environments because they depend > on CC_CAN_LINK, which is set according to the result of > scripts/cc-can-link.sh called by cc_can_link_user. > > Because cc-can-link.sh must now build without warning, it may fail > because it is calling printf() with an empty string: > > + cat > + gcc -m32 -Werror -Wl,--fatal-warnings -x c - -o /dev/null > : In function ‘main’: > :4:9: error: zero-length gnu_printf format string [-Werror=format-zero-length] > cc1: all warnings being treated as errors > > Fix this warning and the samples build by actually printing something. > > Cc: Nathan Chancellor > Cc: Nicolas Schier > Cc: Thomas Weißschuh > Cc: stable@vger.kernel.org > Fixes: d81d9d389b9b ("kbuild: don't enable CC_CAN_LINK if the dummy program generates warnings") > Signed-off-by: Mickaël Salaün > --- > scripts/cc-can-link.sh | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > Thanks! Reviewed-by: Nicolas Schier