Fix kernel source build on GCC 15+#377
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GCC 15 defaults to -std=c23 where bool/false/true are keywords, conflicting with the kernel's own typedefs. Pass -std=gnu11 via KCFLAGS, KCPPFLAGS, and HOSTCFLAGS so the flag reaches all compilation paths, including x86 sub-Makefiles (EFI stub, decompressor, real-mode setup) that rebuild KBUILD_CFLAGS from scratch with :=. Also pass -Wno-error to override the kernel's -Werror (CONFIG_WERROR=y by default) so new compiler warnings on intentional kernel patterns don't break the build. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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GCC 15 defaults to -std=c23 where bool/false/true are keywords, conflicting with the kernel's own typedefs. Pass -std=gnu11 via KCFLAGS, KCPPFLAGS, and HOSTCFLAGS so the flag reaches all compilation paths, including x86 sub-Makefiles (EFI stub, decompressor, real-mode setup) that rebuild KBUILD_CFLAGS from scratch with :=.
Also pass -Wno-error to override the kernel's -Werror (CONFIG_WERROR=y by default) so new compiler warnings, such as
-Wunterminated-string-initializationdon't break the build.
Summary by cubic
Fixes kernel source builds on GCC 15+ by using GNU11 across all compile paths and demoting -Werror so new warnings don’t break the build. Ensures
bzImageandmodules_preparesucceed on modern toolchains.-std=gnu11viaKCFLAGS,KCPPFLAGS, andHOSTCFLAGSto cover x86 sub-Makefiles (EFI stub, decompressor, real-mode).-Wno-errorto override kernel-Werror(CONFIG_WERROR=y), preventing failures from warnings like-Wunterminated-string-initialization.Written for commit 1e48810. Summary will update on new commits. Review in cubic