GH-46748: [C++] Initial port on AIX

[ranjitshs]

Rationale for this change

Fix build errors on AIX.

What changes are included in this PR?

Compilation issue fixed as mentioned in the above issue.

Are these changes tested?

Yes.
Compiled with below settings for initial port.
cmake . -B build --preset ninja-debug-minimal -DCMAKE_INSTALL_PREFIX=/usr/local -DCMAKE_AIX_SHARED_LIBRARY_ARCHIVE=ON -DARROW_CSV=ON -DARROW_JSON=ON -DARROW_FILESYSTEM=ON -DARROW_COMPUTE=ON -DARROW_DATASET=ON

Are there any user-facing changes?

NA

• GitHub Issue: [C++] AIX compilation issue #46748

[github-actions]

Thanks for opening a pull request!

If this is not a minor PR. Could you open an issue for this pull request on GitHub? https://github.com/apache/arrow/issues/new/choose

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Then could you also rename the pull request title in the following format?

GH-${GITHUB_ISSUE_ID}: [${COMPONENT}] ${SUMMARY}

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See also:

• Other pull requests
• Contribution Guidelines - Contributing Overview

[github-actions]

⚠️ GitHub issue #46748 has been automatically assigned in GitHub to PR creator.

[kou]

Could you fix lint errors?

How to maintain AIX support? See also: #46002

[ranjitshs]

Could you fix lint errors?

How to maintain AIX support? See also: #46002

Thanks for suggestion about lint. I have updated the change. Let me know if any comments.
Will go through #46002

[ranjitshs]

Hi @kou
Lint is still failing without giving any details. Please let me know if anything is needed/missing from my side.

C++ Lint.................................................................Failed
- hook id: cpplint
- exit code: 1

[kou]

https://github.com/apache/arrow/actions/runs/15561745991/job/43843132193?pr=46749#step:7:148

cpp/src/arrow/filesystem/localfs.cc:167:  Use int16/int64/etc, rather than the C type long  [runtime/int] [4]

[ranjitshs]

https://github.com/apache/arrow/actions/runs/15561745991/job/43843132193?pr=46749#step:7:148

cpp/src/arrow/filesystem/localfs.cc:167:  Use int16/int64/etc, rather than the C type long  [runtime/int] [4]

I missed to see this in lint report. Thanks for pointing out.
Updated the code as suggested by lint.

[ranjitshs]

@kou
What's next on this PR from my side. Please let me know.

[kou]

Do you have any idea how to maintain AIX support?
We don't have any AIX CI jobs now. So AIX support may be broken in the feature. Is it acceptable?

[ranjitshs]

Do you have any idea how to maintain AIX support? We don't have any AIX CI jobs now. So AIX support may be broken in the feature. Is it acceptable?

I will setup Jenkins CI job for AIX locally for this package and will build main branch on daily basis.
If community can support , then we can provide AIX system where community can setup the CI. But not sure about complexity on setting this .
So for time being, I am thinking to track AIX CI locally...
Let me know your thoughts.

[kou]

+1

OK. Let's start with the approach.

If self-hosted GitHub Runner on AIX is provided, we can add it to our CI.

[ranjitshs]

Thanks @kou for reviewing/merging this.

[conbench-apache-arrow]

After merging your PR, Conbench analyzed the 3 benchmarking runs that have been run so far on merge-commit bd31f83.

There were 119 benchmark results with an error:

• Commit Run on arm64-t4g-2xlarge-linux at 2025-06-18 07:27:09Z
  • tpch (R) with engine=arrow, format=parquet, language=R, memory_map=False, query_id=TPCH-07, scale_factor=1
  • tpch (R) with engine=arrow, format=native, language=R, memory_map=False, query_id=TPCH-09, scale_factor=1
• and 117 more (see the report linked below)

There were no benchmark performance regressions. 🎉

The full Conbench report has more details.