linux-kernel - Re: [PATCH] selftests: fix LLVM build for i386 and x86

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Date:   Sat, 4 Feb 2023 14:19:48 +0100
From:   Guillaume Tucker <guillaume.tucker@...labora.com>
To:     Nathan Chancellor <nathan@...nel.org>
Cc:     Shuah Khan <shuah@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>, Mark Brown <broonie@...nel.org>,
        kernel@...labora.com, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, llvm@...ts.linux.dev
Subject: Re: [PATCH] selftests: fix LLVM build for i386 and x86_64

Hi Shuah, Nathan,

On 09/08/2022 18:41, Nathan Chancellor wrote:
> On Tue, Aug 09, 2022 at 04:22:31PM +0200, Guillaume Tucker wrote:
>> Add missing cases for the i386 and x86_64 architectures when
>> determining the LLVM target for building kselftest.
>>
>> Fixes: 795285ef2425 ("selftests: Fix clang cross compilation")
>> Signed-off-by: Guillaume Tucker <guillaume.tucker@...labora.com>
> 
> Right, I think this is the correct thing to do for the selftests. For
> the main kernel build, we use CLANG_TARGETS_FLAGS_x86 because ARCH=i386
> and ARCH=x86_64 are covered by SUBARCH=x86, which is what we switch on,
> rather than ARCH. I do see a couple of references to SUBARCH in the
> tools directory but I am not sure if that is usable for this part so:
> 
> Reviewed-by: Nathan Chancellor <nathan@...nel.org>

Thanks for the review.

Could you please apply this patch?  It looks like it was
forgotten like the one with the missing trailing ')' I sent
around that time (now fixed with Mark's patch).

Alternatively, please let me know if anything else needs to be
done for it.

Thanks,
Guillaume

>> ---
>>  tools/testing/selftests/lib.mk | 2 ++
>>  1 file changed, 2 insertions(+)
>>
>> diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
>> index b1c62914366b..cc4c443d5b14 100644
>> --- a/tools/testing/selftests/lib.mk
>> +++ b/tools/testing/selftests/lib.mk
>> @@ -10,12 +10,14 @@ endif
>>  CLANG_TARGET_FLAGS_arm          := arm-linux-gnueabi
>>  CLANG_TARGET_FLAGS_arm64        := aarch64-linux-gnu
>>  CLANG_TARGET_FLAGS_hexagon      := hexagon-linux-musl
>> +CLANG_TARGET_FLAGS_i386         := i386-linux-gnu
>>  CLANG_TARGET_FLAGS_m68k         := m68k-linux-gnu
>>  CLANG_TARGET_FLAGS_mips         := mipsel-linux-gnu
>>  CLANG_TARGET_FLAGS_powerpc      := powerpc64le-linux-gnu
>>  CLANG_TARGET_FLAGS_riscv        := riscv64-linux-gnu
>>  CLANG_TARGET_FLAGS_s390         := s390x-linux-gnu
>>  CLANG_TARGET_FLAGS_x86          := x86_64-linux-gnu
>> +CLANG_TARGET_FLAGS_x86_64       := x86_64-linux-gnu
>>  CLANG_TARGET_FLAGS              := $(CLANG_TARGET_FLAGS_$(ARCH))
>>  
>>  ifeq ($(CROSS_COMPILE),)
>> -- 
>> 2.30.2
>>