[jira] [Created] (ARROW-17902) [C++][Gandiva] Solve LLVM 15 CI performace and compatibility issues

["Jin Shang (Jira)" <ji...@apache.org>]

Jin Shang created ARROW-17902:
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             Summary: [C++][Gandiva] Solve LLVM 15 CI performace and compatibility issues
                 Key: ARROW-17902
                 URL: https://issues.apache.org/jira/browse/ARROW-17902
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++ - Gandiva
    Affects Versions: 9.0.0
            Reporter: Jin Shang


Package managers have been upgrading their default LLVM version to 15. This raises several compatibility and performance issues for CI, and we currently are using workaounds
 # Mac's default clang 13's LTO cannot read Brew installed llvm static libs because they are compiled with llvm 15 (https://github.com/apache/arrow/pull/14187#issuecomment-1253322948). Workaround: Use brew installed clang: ARROW-17805 ARROW-17842
 # Conda's packaging of LLVM 15 on Windows is not portable. It required a VS2019 Enterprise version: [https://github.com/conda-forge/llvmdev-feedstock/issues/175.] Workaround: Pin LLVM to 14 for Conda with Windows. ARROW-17830
 # Brew's LLVM15 enables z3 by default and it's shared linked. It breaks Java jar builds on MacOS: [https://github.com/apache/arrow/pull/14261#issuecomment-1263024112.] Workaround: Pin LLVM to 14 for all MacOS tasks.
 # LLVM 15 is noticably slower to build than LLVM 14 for brew and MacOS. Workaround: Pin LLVM to 14 for all MacOS tasks.

 



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