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Posted to github@arrow.apache.org by "sdf-jkl (via GitHub)" <gi...@apache.org> on 2026/09/10 21:38:07 UTC

[PR] Document platform endianness support [arrow-rs]

sdf-jkl opened a new pull request, #11056:
URL: https://github.com/apache/arrow-rs/pull/11056

# Which issue does this PR close?

Related to #6917.

# Rationale for this change

The endianness support and testing expectations discussed in #6917 are not currently stated in the repository's user documentation. Users should be able to find these limitations when choosing a crate.

# What changes are included in this PR?

Add a Platform Support section to the root README and the API landing page of every published library crate. It states that only little-endian platforms are officially supported and tested in CI, while big-endian platforms are untested and may not work correctly. Big-endian fixes are welcome on a best-effort basis, with no compatibility guarantee.

Each crate includes the full paragraph because it can be consumed independently.

# Are these changes tested?

Documentation only. `cargo fmt --all -- --check` and `git diff --check` pass. Verified that the root README and all 25 published library crates contain identical policy wording.

# Are there any user-facing changes?

Documents the platform support and testing expectations. No API or runtime behavior changes.

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Re: [PR] Document platform endianness support [arrow-rs]

Posted by "sdf-jkl (via GitHub)" <gi...@apache.org>.

sdf-jkl commented on PR #11056:
URL: https://github.com/apache/arrow-rs/pull/11056#issuecomment-5674517773

   That was my goal!


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Re: [PR] Document platform endianness support [arrow-rs]

Posted by "Jefffrey (via GitHub)" <gi...@apache.org>.

Jefffrey commented on PR #11056:
URL: https://github.com/apache/arrow-rs/pull/11056#issuecomment-5674615914

   sounds good, can keep #3506 open but close the others


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Re: [PR] Document platform endianness support [arrow-rs]

Posted by "Jefffrey (via GitHub)" <gi...@apache.org>.

Jefffrey commented on PR #11056:
URL: https://github.com/apache/arrow-rs/pull/11056#issuecomment-5674284655

   should we use this PR to close all the related endian issues, given it makes our stance clear we aim only for little endian support?


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Re: [PR] Document platform endianness support [arrow-rs]

Posted by "sdf-jkl (via GitHub)" <gi...@apache.org>.

sdf-jkl commented on PR #11056:
URL: https://github.com/apache/arrow-rs/pull/11056#issuecomment-5674706065

   I can add "- closes #XXXX" to the description and merge tomorrow. But feel free to merge yourself.


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Re: [PR] Document platform endianness support [arrow-rs]

Posted by "Jefffrey (via GitHub)" <gi...@apache.org>.

Jefffrey merged PR #11056:
URL: https://github.com/apache/arrow-rs/pull/11056


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Re: [PR] Document platform endianness support [arrow-rs]

Posted by "sdf-jkl (via GitHub)" <gi...@apache.org>.

sdf-jkl commented on PR #11056:
URL: https://github.com/apache/arrow-rs/pull/11056#issuecomment-5625800017

   @alamb @Jefffrey fyi


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Re: [PR] Document platform endianness support [arrow-rs]

Posted by "sdf-jkl (via GitHub)" <gi...@apache.org>.

sdf-jkl commented on PR #11056:
URL: https://github.com/apache/arrow-rs/pull/11056#issuecomment-5638834665

   > I think it may be better to just place this comment in the readme or in some other centralized place instead of repeating it
   
   True, but my rationale above -- Each crate includes the full paragraph because it can be consumed independently.
   
   I thought about having links from each file to one place, but 7loc per file seemed trivial to me


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Re: [PR] Document platform endianness support [arrow-rs]

Posted by "sdf-jkl (via GitHub)" <gi...@apache.org>.

sdf-jkl commented on PR #11056:
URL: https://github.com/apache/arrow-rs/pull/11056#issuecomment-5674542298

   #3506 seems like a still valid bug though 


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Re: [PR] Document platform endianness support [arrow-rs]

Posted by "Rich-T-kid (via GitHub)" <gi...@apache.org>.

Rich-T-kid commented on PR #11056:
URL: https://github.com/apache/arrow-rs/pull/11056#issuecomment-5674434595

   sounds like a good idea to me


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Re: [PR] Document platform endianness support [arrow-rs]

Posted by "Jefffrey (via GitHub)" <gi...@apache.org>.

Jefffrey commented on PR #11056:
URL: https://github.com/apache/arrow-rs/pull/11056#issuecomment-5674946946

   thanks all


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