fix: ARM64 build fails due to x86-only CRC32 intrinsics#597
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kernelwernel merged 1 commit intokernelwernel:mainfrom Jan 6, 2026
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The __attribute__((__target__("crc32"))) and _mm_crc32_u8 intrinsics
are x86-specific but were only guarded by #if (CLANG || GCC), causing
ARM64 builds to fail.
Changes:
- Add x86 guard to target("crc32") attribute
- Add #if (x86) guard around _mm_crc32_u8 with software fallback
Owner
|
Thanks for catching the bug, this is incredibly helpful :) |
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Building on
aarch64-unknown-linux-gnufails with:The
#if (CLANG || GCC)guard should also check forx86sincetarget("crc32")and_mm_crc32_u8are x86-only.Fixed by changing to
#if (x86 && (CLANG || GCC))and adding a software fallback incrc32_hwfor non-x86.