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https://issues.apache.org/jira/browse/ARROW-15445?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17481775#comment-17481775
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Antoine Pitrou commented on ARROW-15445:
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Well, apparently CMAKE_SYSTEM_PROCESSOR is "x86_64". Are you sure you are
cross-compiling correctly? According to the CMake docs:
{quote}When cross-compiling, a CMAKE_TOOLCHAIN_FILE should set the
CMAKE_SYSTEM_PROCESSOR variable to match target architecture that it specifies
(via CMAKE_<LANG>{_}COMPILER and perhaps CMAKE{_}<LANG>_COMPILER_TARGET).
{quote}
(in https://cmake.org/cmake/help/latest/variable/CMAKE_SYSTEM_PROCESSOR.html)
> [C++/Python] pyarrow build incorrectly detects x86 as system process during
> cross-cimpile
> -----------------------------------------------------------------------------------------
>
> Key: ARROW-15445
> URL: https://issues.apache.org/jira/browse/ARROW-15445
> Project: Apache Arrow
> Issue Type: Bug
> Components: C++, Python
> Reporter: Uwe Korn
> Priority: Major
>
> When cross-compiling {{pyarrow}} for aarch64 or ppc64le we run into the
> following issue:
> {code:java}
> -- System processor: x86_64
> -- Performing Test CXX_SUPPORTS_SSE4_2
> -- Performing Test CXX_SUPPORTS_SSE4_2 - Failed
> -- Performing Test CXX_SUPPORTS_AVX2
> -- Performing Test CXX_SUPPORTS_AVX2 - Failed
> -- Performing Test CXX_SUPPORTS_AVX512
> -- Performing Test CXX_SUPPORTS_AVX512 - Failed
> -- Arrow build warning level: PRODUCTION
> CMake Error at cmake_modules/SetupCxxFlags.cmake:456 (message):
> SSE4.2 required but compiler doesn't support it.
> Call Stack (most recent call first):
> CMakeLists.txt:121 (include)
> -- Configuring incomplete, errors occurred!
> {code}
> The error is valid as we are building for a target system that doesn't
> support SSE at all.
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