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authorLinus Torvalds <torvalds@linux-foundation.org>2023-01-09 17:04:49 -0600
committerLinus Torvalds <torvalds@linux-foundation.org>2023-01-09 17:04:49 -0600
commit5a41237ad1d4b62008f93163af1d9b1da90729d8 (patch)
tree75c0cfe816f7cfde27a5ffa432ab7d23f4e45575 /init
parent1fe4fd6f5cad346e598593af36caeadc4f5d4fa9 (diff)
gcc: disable -Warray-bounds for gcc-11 too
We had already disabled this warning for gcc-12 due to bugs in the value range analysis, but it turns out we end up having some similar problems with gcc-11.3 too, so let's disable it there too. Older gcc versions end up being increasingly less relevant, and hopefully clang and newer version of gcc (ie gcc-13) end up working reliably enough that we still get the build coverage even when we disable this for some versions. Link: https://lore.kernel.org/all/20221227002941.GA2691687@roeck-us.net/ Link: https://lore.kernel.org/all/D8BDBF66-E44C-45D4-9758-BAAA4F0C1998@kernel.org/ Cc: Kees Cook <kees@kernel.org> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'init')
-rw-r--r--init/Kconfig6
1 files changed, 5 insertions, 1 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 7e5c3ddc341d..0958846b005e 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -894,13 +894,17 @@ config CC_IMPLICIT_FALLTHROUGH
default "-Wimplicit-fallthrough=5" if CC_IS_GCC && $(cc-option,-Wimplicit-fallthrough=5)
default "-Wimplicit-fallthrough" if CC_IS_CLANG && $(cc-option,-Wunreachable-code-fallthrough)
-# Currently, disable gcc-12 array-bounds globally.
+# Currently, disable gcc-11,12 array-bounds globally.
# We may want to target only particular configurations some day.
+config GCC11_NO_ARRAY_BOUNDS
+ def_bool y
+
config GCC12_NO_ARRAY_BOUNDS
def_bool y
config CC_NO_ARRAY_BOUNDS
bool
+ default y if CC_IS_GCC && GCC_VERSION >= 110000 && GCC_VERSION < 120000 && GCC11_NO_ARRAY_BOUNDS
default y if CC_IS_GCC && GCC_VERSION >= 120000 && GCC_VERSION < 130000 && GCC12_NO_ARRAY_BOUNDS
#