From: Tiezhu Yang <yangtiezhu@loongson.cn> Date: 2021-03-04 08:06:04
When building with Clang [1]:
$ make CC=clang loongson3_defconfig
$ make CC=clang
there exists the following error:
Checking missing-syscalls for O32
CALL scripts/checksyscalls.sh
error: ABI 'o32' is not supported on CPU 'mips64r2'
make[1]: *** [Kbuild:48: missing-syscalls] Error 1
make: *** [arch/mips/Makefile:419: archprepare] Error 2
This is a known bug [2] with Clang, as Simon Atanasyan said,
"There is no plan on support O32 for MIPS64 due to lack of
resources".
It is not a good idea to remove CONFIG_MIPS32_O32=y directly
in defconfig because GCC works, as Nathan said, the config
should not even be selectable when building with Clang, so
just make MIPS32_O32 depends on !CC_IS_CLANG.
[1] https://www.kernel.org/doc/html/latest/kbuild/llvm.html
[2] https://bugs.llvm.org/show_bug.cgi?id=38063
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Acked-by: Nathan Chancellor <nathan@kernel.org>
---
v3: Update the commit message suggested by Nathan, thank you!
arch/mips/Kconfig | 2 ++
1 file changed, 2 insertions(+)
From: Nick Desaulniers <ndesaulniers@google.com> Date: 2021-03-04 17:39:33
On Thu, Mar 4, 2021 at 12:04 AM Tiezhu Yang [off-list ref] wrote:
When building with Clang [1]:
$ make CC=clang loongson3_defconfig
$ make CC=clang
there exists the following error:
Checking missing-syscalls for O32
CALL scripts/checksyscalls.sh
error: ABI 'o32' is not supported on CPU 'mips64r2'
make[1]: *** [Kbuild:48: missing-syscalls] Error 1
make: *** [arch/mips/Makefile:419: archprepare] Error 2
This is a known bug [2] with Clang, as Simon Atanasyan said,
"There is no plan on support O32 for MIPS64 due to lack of
resources".
It's my hope we will fix the resourcing issue. I'm working on that;
it's a non-technical challenge though.
Acked-by: Nick Desaulniers <ndesaulniers@google.com>
quoted hunk
It is not a good idea to remove CONFIG_MIPS32_O32=y directly
in defconfig because GCC works, as Nathan said, the config
should not even be selectable when building with Clang, so
just make MIPS32_O32 depends on !CC_IS_CLANG.
[1] https://www.kernel.org/doc/html/latest/kbuild/llvm.html
[2] https://bugs.llvm.org/show_bug.cgi?id=38063
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Acked-by: Nathan Chancellor <nathan@kernel.org>
---
v3: Update the commit message suggested by Nathan, thank you!
arch/mips/Kconfig | 2 ++
1 file changed, 2 insertions(+)