* [Buildroot] Fail to compile Linux kernel 5.14 with GCC15 [not found] <813093532.2289630.1794564858648.ref@mail.yahoo.com> @ 2026-11-13 10:14 ` David Luca via buildroot 2026-11-13 10:54 ` Julien Olivain via buildroot 0 siblings, 1 reply; 2+ messages in thread From: David Luca via buildroot @ 2026-11-13 10:14 UTC (permalink / raw) To: Julien Olivain via Buildroot [-- Attachment #1.1: Type: text/plain, Size: 508 bytes --] Hello, As mentioned in the title, I receive a compile error for arch/x86/realmode/rm/wakemain.c: ./include/linux/stddef:11:9: error: cannot use keyword 'false' as enumeration constant Note: 'false'is a keyword with' '-std=c23' onwards. So I patched my buildroot linux/linux.mk to add: ifeq ($(BR_TOOLCHAIN_GCC_AT_LEAST_15),y) LINUX_CFLAGS += -std=gnu17 endif However the compiler error is still happening, any idea how to fix? Best regards, David. Yahoo Mail: Search, organise, conquer [-- Attachment #1.2: Type: text/html, Size: 1063 bytes --] [-- Attachment #2: Type: text/plain, Size: 150 bytes --] _______________________________________________ buildroot mailing list buildroot@buildroot.org https://lists.buildroot.org/mailman/listinfo/buildroot ^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [Buildroot] Fail to compile Linux kernel 5.14 with GCC15 2026-11-13 10:14 ` [Buildroot] Fail to compile Linux kernel 5.14 with GCC15 David Luca via buildroot @ 2026-11-13 10:54 ` Julien Olivain via buildroot 0 siblings, 0 replies; 2+ messages in thread From: Julien Olivain via buildroot @ 2026-11-13 10:54 UTC (permalink / raw) To: David Luca; +Cc: Julien Olivain via Buildroot Hi David, On 13/11/2026 11:14, David Luca via buildroot wrote: > Hello, > As mentioned in the title, I receive a compile error for > arch/x86/realmode/rm/wakemain.c: > ./include/linux/stddef:11:9: error: cannot use keyword 'false' as > enumeration constant > Note: 'false'is a keyword with' '-std=c23' onwards. > So I patched my buildroot linux/linux.mk to add: > ifeq ($(BR_TOOLCHAIN_GCC_AT_LEAST_15),y) > LINUX_CFLAGS += -std=gnu17 > endif > However the compiler error is still happening, any idea how to fix? Kernel 5.14 was not a LTS, you should consider updating your kernel. If not possible, you could probably backport fixes from 5.15, such as: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f28b14d235a810e4f6634832062b6e0ffc482b5a https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=518eadd15f7ecde6d301974388c6be03d5c57a0c ... You can probably search relevant commits with: git log -S std= linux-5.15.y > Best regards, > David. Best regards, Julien. _______________________________________________ buildroot mailing list buildroot@buildroot.org https://lists.buildroot.org/mailman/listinfo/buildroot ^ permalink raw reply [flat|nested] 2+ messages in thread
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2026-11-13 10:14 ` [Buildroot] Fail to compile Linux kernel 5.14 with GCC15 David Luca via buildroot
2026-11-13 10:54 ` Julien Olivain via buildroot
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