Add shared CPU hardware capability detection in uucore to prevent
code duplication across utilities. This provides a unified interface
for detecting CPU features (AVX512, AVX2, PCLMUL, SSE2, ASIMD) and
respecting GLIBC_TUNABLES environment variable.
This unblocks PR #9088 (cksum --debug) and PR #9144 (wc --debug) by
providing a common implementation that both utilities can use.
Features:
- CPU feature detection with caching (singleton pattern)
- GLIBC_TUNABLES parsing for hwcaps restrictions
- Cross-platform support (x86/x86_64, aarch64)
- Comprehensive test coverage
- Zero-cost abstractions using std::arch
Implementation details:
- Uses std::arch feature detection (no external deps for detection)
- Adds cfg-if dependency for conditional compilation
- Feature-gated behind "hardware" feature flag
- Android excluded (no CPUID access in sandboxed environment)
Related: #9088, #9144
- Implement correct CRC32B algorithm with proper polynomial and initialization
- Add comprehensive test fixtures for CRC32B validation
- Support raw output format for CRC32B checksums
- Update dependencies and lock files for compatibility
- Fix code formatting and style issues
xtqqczzeandGitHub
Sylvestre Ledru
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Chris DrydenandGitHub
renovate[bot]andGitHub
Aaron Ang
Daniel HofstetterandGitHub
Dorian Peron
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