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Fri, 4 Jul 2025 09:26:13 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ThreadId: T64ccb58220bb6c4f Date: Fri, 04 Jul 2025 15:25:49 +0200 From: "Arnd Bergmann" To: "Jeff Johnson" Cc: linux-kernel@vger.kernel.org, "Peter Zijlstra" , "Josh Poimboeuf" Message-Id: <617201f8-1ad7-4403-b195-8c80d35ea30f@app.fastmail.com> In-Reply-To: <8362b484-ea77-4825-8ccb-d5acad660102@oss.qualcomm.com> References: <8362b484-ea77-4825-8ccb-d5acad660102@oss.qualcomm.com> Subject: Re: build failure with crosstools gcc 15.1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit On Mon, Jun 23, 2025, at 21:52, Jeff Johnson wrote: > I've been using crosstools gcc 14.2.0. > > Today I saw that gcc 15.1.0 has been added to crosstools: > https://www.kernel.org/pub/tools/crosstool/files/bin/x86_64/15.1.0/ > > But when I try it I'm getting an error: > LD vmlinux.o > vmlinux.o: warning: objtool: ncsi_process_next_channel() falls through > to next function ncsi_channel_monitor.cold() > vmlinux.o: error: objtool [elf.c:1360]: elf_write: elf_update failed: > invalid section alignment > make[5]: *** [scripts/Makefile.vmlinux_o:72: vmlinux.o] Error 1 > make[5]: *** Deleting file 'vmlinux.o' > make[5]: Target '__default' not remade because of errors. > make[4]: *** [Makefile:1217: vmlinux_o] Error 2 > make[4]: Target 'all' not remade because of errors. > make[3]: *** [debian/rules:80: build-arch] Error 2 > make[3]: Target 'binary' not remade because of errors. > dpkg-buildpackage: error: make -f debian/rules binary subprocess > returned exit status 2 > make[2]: *** [scripts/Makefile.package:126: bindeb-pkg] Error 2 > make[1]: *** > [/local/mnt/workspace/jjohnson/kernel/laptop-debug/Makefile:1635: > bindeb-pkg] Error 2 > make: *** [Makefile:248: __sub-make] Error 2 > make: Target 'bindeb-pkg' not remade because of errors. > > This is with a simple x86 make C=1 W=1 -j8 bindeb-pkg > > Any thoughts? Hi Jeff, Sorry for the late reply, have you figured it out in the meantime? I couldn't immediately reproduce it, so it may already be fixed in linux-next. My best guess is that this is an objtool issue, as new compiler versions tend to trigger new cases that were not previously covered in objtool. Arnd