cyb70289 commented on a change in pull request #11456:
URL: https://github.com/apache/arrow/pull/11456#discussion_r731590208
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File path: python/CMakeLists.txt
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@@ -103,9 +103,21 @@ set(BUILD_WARNING_LEVEL "PRODUCTION")
# This must be synchronized with the definition in
# cpp/cmake_modules/DefineOptions.cmake.
-set(ARROW_ARMV8_ARCH
- "armv8-a"
- CACHE STRING "Arm64 arch and extensions: armv8-a, armv8-a or
armv8-a+crc+crypto")
+if(NOT DEFINED ARROW_SIMD_LEVEL)
+ set(ARROW_SIMD_LEVEL
+ "DEFAULT"
+ CACHE STRING "Compile time SIMD optimization level")
+endif()
Review comment:
`ARROW_SIMD_LEVEL` variable is empty if we don't set it here explicitly,
same as passing `-DARROW_SIMD_LEVEL=`. It disables simd silently when building
cpp files under python dir.
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