[jira] [Created] (ARROW-15445) [C++/Python] pyarrow build incorrectly detects x86 as system process during cross-cimpile

["Uwe Korn (Jira)" <ji...@apache.org>]

Uwe Korn created ARROW-15445:
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             Summary: [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


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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