[jira] [Resolved] (ARROW-18126) [Python] Remove ARROW_BUILD_DIR in building pyarrow C++

["Kouhei Sutou (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-18126?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kouhei Sutou resolved ARROW-18126.
----------------------------------
    Fix Version/s: 11.0.0
       Resolution: Fixed

Issue resolved by pull request 14498
[https://github.com/apache/arrow/pull/14498]

> [Python] Remove ARROW_BUILD_DIR in building pyarrow C++
> -------------------------------------------------------
>
>                 Key: ARROW-18126
>                 URL: https://issues.apache.org/jira/browse/ARROW-18126
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: Python
>            Reporter: Joris Van den Bossche
>            Assignee: Alenka Frim
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 11.0.0
>
>          Time Spent: 0.5h
>  Remaining Estimate: 0h
>
> When building pyarrow, I see the following warning:
> {code}
> CMake Warning:
>   Manually-specified variables were not used by the project:
>     ARROW_BUILD_DIR
> {code}
> While we have a note in our docs (https://arrow.apache.org/docs/dev/developers/python.html#build-and-test) that says:
> bq. If you used a different directory name for building Arrow C++ (by default it is named “build”), then you should also set the environment variable {{ARROW_BUILD_DIR='name_of_build_dir'}}. This way PyArrow can find the Arrow C++ built files.
> I see in the setup.py code that we check for this env variable and pass it to CMake, but it's not actually used in any of the CMakeLists.txt files for pyarrow.
> This might have been accidentally changed in one of the recent cmake refactors? (cc [~kou] [~alenka])



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