Implement randUint64() directly in the maphash overlay to ensure compatibility
across Go versions. Go 1.21's randUint64() calls runtime.fastrand64, while
Go 1.22+ calls runtime.rand. The wrapper function bridges to llgo's fastrand64
implementation, avoiding undefined symbol errors on Go 1.21.
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Co-authored-by: luoliwoshang <luoliwoshang@users.noreply.github.com>
The llgo:skipall directive was preventing fallback to the standard library,
causing undefined symbol errors for functions like WriteString, MakeSeed, etc.
The overlay now only defines the two linkname functions, allowing typepatch
to handle the rest.
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Co-authored-by: luoliwoshang <luoliwoshang@users.noreply.github.com>
Move runtime_rand and runtime_memhash linkname declarations from
runtime/internal/lib/runtime/runtime.go to runtime/internal/lib/hash/maphash/maphash.go
to avoid polluting the runtime package namespace.
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Co-authored-by: luoliwoshang <luoliwoshang@users.noreply.github.com>
