diff options
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/Makefile.extrawarn | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn index 2d6e59561c9d..59d3d196fe4f 100644 --- a/scripts/Makefile.extrawarn +++ b/scripts/Makefile.extrawarn @@ -45,8 +45,13 @@ endif # These result in bogus false positives KBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer) -# Variable Length Arrays (VLAs) should not be used anywhere in the kernel -KBUILD_CFLAGS += -Wvla +# Stack Variable Length Arrays (VLAs) must not be used in the kernel. +# Function array parameters should, however, be usable, but -Wvla will +# warn for those. Clang has no way yet to distinguish between the VLA +# types, so depend on GCC for now to keep stack VLAs out of the tree. +# https://github.com/llvm/llvm-project/issues/57098 +# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98217 +KBUILD_CFLAGS += $(call cc-option,-Wvla-larger-than=1) # disable pointer signed / unsigned warnings in gcc 4.0 KBUILD_CFLAGS += -Wno-pointer-sign |