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Wed, 17 Dec 2025 13:10:38 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id 1amIMs6rQmkkQQAAD6G6ig (envelope-from ); Wed, 17 Dec 2025 13:10:38 +0000 Date: Wed, 17 Dec 2025 14:10:37 +0100 From: Jean Delvare To: Peter Zijlstra Cc: LKML Subject: Re: Build breakage caused by the use of UDB Message-ID: <20251217141037.2dff77b8@endymion> In-Reply-To: <20251217124713.GD3708021@noisy.programming.kicks-ass.net> References: <20251217124119.5832bba7@endymion> <20251217123536.GE3707891@noisy.programming.kicks-ass.net> <20251217124713.GD3708021@noisy.programming.kicks-ass.net> Organization: SUSE Linux X-Mailer: Claws Mail 4.2.0 (GTK 3.24.43; x86_64-suse-linux-gnu) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Spamd-Result: default: False [-3.73 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_RHS_NOT_FQDN(0.50)[]; NEURAL_HAM_SHORT(-0.13)[-0.662]; MIME_GOOD(-0.10)[text/plain]; RCPT_COUNT_TWO(0.00)[2]; HAS_ORG_HEADER(0.00)[]; ARC_NA(0.00)[]; FUZZY_RATELIMITED(0.00)[rspamd.com]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCVD_TLS_ALL(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; TO_DN_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; MIME_TRACE(0.00)[0:+]; FROM_EQ_ENVFROM(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo] X-Spam-Level: X-Spam-Flag: NO X-Spam-Score: -3.73 Hi Peter, On Wed, 17 Dec 2025 13:47:13 +0100, Peter Zijlstra wrote: > On Wed, Dec 17, 2025 at 01:35:36PM +0100, Peter Zijlstra wrote: > > On Wed, Dec 17, 2025 at 12:44:23PM +0100, Jean Delvare wrote: > > > I must confess this is all way beyond me and I have no idea how this > > > change can cause such a build failure, but it does. If it matters, my > > > compiler is gcc 8.2.1. > > > > Well, that is somewhat unexpected. None of the build robots fingered > > this. Is there a particular .config I should try? > > > > I don't seem to have 8.2.1 at hand, but I'll try with 8.3.0. > > I had to (obviously) enable the RTL8192 bits, but then, yes. gcc-8 fails > to build this while gcc-10 doesn't seem to have any problems (for some > reason my random dev machine of the day doesn't seem to have gcc-9). As an additional data point, clang 17.0.6 builds the kernel just fine for me. > Let me prod at this for a bit. But also, is there a good reason you're > using this stone-age compiler? :-) And yes, its our minimum supported, > so I suppose I should go fix, but other than build testing, you really > shoulnd't be using it. Actually the default C compiler on my openSUSE Leap 15.6 system is even gcc 7, I had to manually install gcc 8 and use CC= because gcc 7 is no longer supported for upstream kernel builds. I think Leap only changes the default compiler on major version changes, and Leap 15.0 was released 7.5 years ago. If gcc 8 is considered too old, that's fine with me, I can switch to yet another compiler, but then Documentation/process/changes.rst should be updated to reflect that. As long as our documentation says a compiler is supported, I am willing to use it to verify if that's actually true ;-) Thanks, -- Jean Delvare SUSE L3 Support