uber/h3

Update clang and add ARM msan

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#979 opened on Mar 6, 2025

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help wanted

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Description

As discussed in https://github.com/uber/h3/pull/975, we would like the ability to run -fsanitize=memory -fno-sanitize-recover=memory on ARM, which we think is unblocked by upgrading clang.

Note: This might also affect the version of clang-format that the project uses, which is currently at 14.

@isaacbrodsky, let me know if I'm missing anything or got something wrong!

Contributor guide

Research direction
Check the current clang version in the build system and update it to a version that supports ARM msan. Then add the necessary compiler flags for memory sanitization on ARM. Verify with the linked PR discussion for constraints.
Tech stack
c
Domain
backendinfrastructure
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
CCMake
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60