Check for SSSE3 instructions. #21178
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These are needed for Homebrew on Linux x86_64.
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Pull request overview
This PR adds runtime detection for SSSE3 CPU instruction support on Linux x86_64 systems, making it an explicit requirement for Homebrew on Linux. The change addresses a requirement mentioned in the PR description that SSSE3 instructions are needed for Homebrew on Linux x86_64.
Key Changes:
- Added SSSE3 requirement to Tier 1 Linux support documentation
- Implemented runtime CPU capability check that fails early on x86_64 Linux systems without SSSE3
- Updated CODEOWNERS to reflect current team structure
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
| docs/Support-Tiers.md | Documents SSSE3 as an explicit requirement for x86_64 Tier 1 Linux support |
| Library/Homebrew/brew.sh | Adds early boot check to detect and fail on x86_64 Linux systems lacking SSSE3 CPU support |
| CODEOWNERS | Updates ownership of Support-Tiers.md from @Homebrew/tsc to @Homebrew/lead-maintainers |
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p-linnane
approved these changes
Dec 5, 2025
carlocab
approved these changes
Dec 5, 2025
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Check for SSSE3 instructions.
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These are needed for Homebrew on Linux x86_64.