lriggs opened a new issue, #862:
URL: https://github.com/apache/arrow-java/issues/862
### Describe the bug, including details regarding any error messages,
version, and platform.
The Mac build uses an older LLVM version (15) than Linux (18). This seems to
be related to the CI code and the fact that the mac github runners have llvm
installed via brew
https://github.com/actions/runner-images/blob/releases/macos-14-arm64/20250915/images/macos/macos-14-arm64-Readme.md
Even newer runners only have LLVM 17.
The discrepancy could lead to hard to find bugs or performance issues.
Is it possible to use vcpkg for the mac builds? That way we could be assured
that they are always consistent across platforms.
A few related changes I found:
Unpin the llvm version in arrow/cpp/Brewfile. I think this might mean that
theoretically the latest llvm could be installed but since the runner image
already has an older one installed, that is used instead.
https://github.com/apache/arrow/commit/c1f995226c46c2bba9c5fbf988cf9b247f87adad
A related change talking about llvm 14.
https://github.com/lriggs/arrow/commit/48c6738ec2fd69c90c49ed38a580bf48a578af0a
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