wpleonardo commented on PR #1375:
URL: https://github.com/apache/orc/pull/1375#issuecomment-1517823536
Just fixed an AVX512 flag check issue on windows platform.
In CI Windows test, the test machine doesn't have AVX512 CPU flags, but in
Cmake file, the checking code failed to verify successfully. The reason is that
check_cxx_compiler_flag("/arch:AVX512" COMPILER_SUPPORT_AVX512)
only check if enable the use of AVX512 instructions
(https://learn.microsoft.com/en-us/cpp/build/reference/arch-x64?view=msvc-170),
but CPU doesn't have AVX512 flags.
So, I changed the checking code to
check_cxx_compiler_flag("-mavx512f -mavx512cd -mavx512vl -mavx512dq
-mavx512bw" COMPILER_SUPPORT_AVX512)
It will verify if the current CPU has AVX512 instructions directly.
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