[jira] [Created] (ARROW-18340) [Python] PyArrow C++ header files no longer always included in installed pyarrow

["Joris Van den Bossche (Jira)" <ji...@apache.org>]

Joris Van den Bossche created ARROW-18340:
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             Summary: [Python] PyArrow C++ header files no longer always included in installed pyarrow
                 Key: ARROW-18340
                 URL: https://issues.apache.org/jira/browse/ARROW-18340
             Project: Apache Arrow
          Issue Type: Improvement
            Reporter: Joris Van den Bossche
            Assignee: Alenka Frim
             Fix For: 10.0.1


We have a python build env var to control whether the Arrow C++ header files are included in the python package or not ({{PYARROW_BUNDLE_ARROW_CPP_HEADERS}}). This is set to True by default, and only in the conda recipe set to False.

After the cmake refactor, the Python C++ header files no longer live in the Arrow C++ package, and so should _always_ be included in the python package, regardless of how arrow-cpp is installed. 
Initially this was done, but it seems that https://github.com/apache/arrow/pull/13892 removed this unconditional copy of the PyArrow header files to {{pyarrow/include}}. Now it is only copied if {{PYARROW_BUNDLE_ARROW_CPP_HEADERS}} is enabled.




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