Makefile.extrawarn: Move -Wcast-function-type-strict to W=1

We enable -Wcast-function-type globally in the kernel to warn about mismatching types in function pointer casts. Compilers currently warn only about ABI incompability with this flag, but Clang 16 will enable a stricter version of the check by default that checks for an exact type match. This will be very noisy in the kernel, so disable -Wcast-function-type-strict without W=1 until the new warnings have been addressed. Cc: [email protected] Link: https://reviews.llvm.org/D134831 Link: ClangBuiltLinux#1724 Suggested-by: Nathan Chancellor <[email protected]> Signed-off-by: Sami Tolvanen <[email protected]> Signed-off-by: Kees Cook <[email protected]> Link: https://lore.kernel.org/r/[email protected]
majek · Oct 1, 2022 · 2120635 · 2120635
1 parent 607e57c
commit 2120635
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn
@@ -52,6 +52,7 @@ KBUILD_CFLAGS += -Wno-sign-compare
 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-to-enum-cast)
 KBUILD_CFLAGS += -Wno-tautological-constant-out-of-range-compare
 KBUILD_CFLAGS += $(call cc-disable-warning, unaligned-access)
+KBUILD_CFLAGS += $(call cc-disable-warning, cast-function-type-strict)
 endif
 
 endif