Updated runtime/internal/lib/internal/platform/platform.go to match
the original Go internal/platform package structure:
- Added OSArch struct with GOOS and GOARCH fields
- Added osArchInfo struct with CgoSupported, FirstClass, and Broken fields
- Created distInfo map using OSArch as keys
- Updated CgoSupported function to use map lookup (matches original implementation)
This change makes the package structure more consistent with Go's
standard library and follows the established pattern more closely.
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Created runtime/internal/lib/internal/platform package to house the
CgoSupported function, following the established pattern used by other
internal packages like internal/itoa.
Changes:
- Created runtime/internal/lib/internal/platform/platform.go
- Moved cgoSupported function to platform.CgoSupported
- Updated runtime/internal/lib/go/build/build.go to import and use
the new package
This refactoring improves code organization by separating
platform-specific utilities into their own package, making the code
more maintainable and reusable.
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Replaced hardcoded goVersion constant with parseGoVersion() function
that dynamically extracts the Go version from runtime.Version().
This eliminates the need to update the version manually.
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Learned from other AltPkg implementations to create a truly minimal patch:
- Moved from 2073-line overlay to 127-line hasAltPkg implementation
- Replaced internal package dependencies:
* internal/buildcfg → runtime.GOARCH/GOOS
* internal/goversion → hardcoded constant (24)
* internal/platform.CgoSupported → simplified implementation
* internal/buildcfg.ToolTags → simplified buildToolTags()
- Used type alias (Context = build.Context) to reference stdlib types
- Added go/build to hasAltPkg map
- Removed overlay entirely
This follows the pattern used by other AltPkg packages and achieves
the minimal patching approach requested.
Demo verified working with llgo.
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- Add tests for all major hash/maphash public APIs:
* Hash basics (WriteString, Sum64, Reset)
* MakeSeed and SetSeed functionality
* Write methods (Write, WriteByte, WriteString)
* Bytes and String convenience functions
- Use panic() for unexpected errors instead of silent failures
- Add proper error checking and validation
- Document Comparable/WriteComparable limitations in overlay
Note: Comparable() and WriteComparable() are not yet supported and will
panic with 'intrinsic' error as they require runtime intrinsic support.
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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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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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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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- Register hash/maphash in hasAltPkg map in runtime/build.go
- Add rand() function that bridges to fastrand64() in runtime overlay
- Add memhash() function that bridges to internal memhash() in runtime overlay
- Fixes issue where hash/maphash package failed with undefined symbols
Fixes#1338
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Co-authored-by: xgopilot <noreply@goplus.org>
