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| author | Masahiro Yamada <masahiroy@kernel.org> | 2020-03-10 13:12:50 +0300 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2020-03-12 01:43:03 +0300 |
| commit | 3a7c733165a4799fa1beb262fe244bfbcdd1c163 (patch) | |
| tree | 9998af16dd2464632fbc5a37339a11e971bc36de /Documentation/kbuild/kbuild.rst | |
| parent | 8cc4fd73501d9f1370c3eebb70cfe8cc9e24062b (diff) | |
| download | linux-3a7c733165a4799fa1beb262fe244bfbcdd1c163.tar.xz | |
int128: fix __uint128_t compiler test in Kconfig
The support for __uint128_t is dependent on the target bit size.
GCC that defaults to the 32-bit can still build the 64-bit kernel
with -m64 flag passed.
However, $(cc-option,-D__SIZEOF_INT128__=0) is evaluated against the
default machine bit, which may not match to the kernel it is building.
Theoretically, this could be evaluated separately for 64BIT/32BIT.
config CC_HAS_INT128
bool
default !$(cc-option,$(m64-flag) -D__SIZEOF_INT128__=0) if 64BIT
default !$(cc-option,$(m32-flag) -D__SIZEOF_INT128__=0)
I simplified it more because the 32-bit compiler is unlikely to support
__uint128_t.
Fixes: c12d3362a74b ("int128: move __uint128_t compiler test to Kconfig")
Reported-by: George Spelvin <lkml@sdf.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: George Spelvin <lkml@sdf.org>
Diffstat (limited to 'Documentation/kbuild/kbuild.rst')
0 files changed, 0 insertions, 0 deletions