Implements support for TinyGo-style //export directive that allows
exporting functions with symbol names different from the Go function name.
This is essential for embedded development where hardware specifications
require specific symbol names (e.g., ARM Cortex-M interrupt handlers like
LPSPI2_IRQHandler, SysTick_Handler).
Changes:
- Modified cl/import.go to support two export formats:
1. //export ExportName (TinyGo-style, export name can differ from function name)
2. //export FuncName ExportName (Go-style, explicit function and export names)
- Added test case in _demo/embedded/export_test/ with nm verification
Example usage:
//export LPSPI2_IRQHandler
func interruptLPSPI2() {
// exported as LPSPI2_IRQHandler
}
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- Moved test from _cmptest/reflect_indirect/ to _demo/go/reflect-indirect/
- Refactored to use panic() for validation instead of fmt.Println
- Added proper assertions for all test cases
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Enhanced the demo test to cover comprehensive import scenarios:
- Test 1: build.Default context with GOOS/GOARCH validation
- Test 2: Standard library package import (fmt)
- Test 3: Nested standard library package (os/exec)
- Test 4: Internal package import (internal/cpu)
- Test 5: Runtime package with Dir validation
- Test 6: ImportDir with current directory
- Test 7: IsLocalImport with multiple path formats
- Test 8: Context GOPATH/GOROOT validation
- Test 9: Import with AllowBinary flag
- Test 10: Release tags validation
All tests include proper result validation to ensure go/build
patches work correctly across different use cases.
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Enhanced the demo test to cover more go/build functionality:
- build.Import (existing)
- build.ImportDir (new)
- build.IsLocalImport (new)
- build.Default context verification (existing, improved)
This ensures the go/build patches work correctly across different
public functions, not just Import.
Also ran go fmt to fix formatting issues reported by CI.
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- Created zcgo.go with defaultCGO_ENABLED constant (Go 1.24 pattern)
- Updated parseGoVersion to panic on unexpected input instead of fallback
- Added runtime.(*Func).Name stub to symtab.go for Go 1.21/1.22 compatibility
- Removed go1.23 build constraint from demo
- Removed internal/buildcfg package (replaced by zcgo.go)
These changes ensure the demo works across Go 1.21+ versions.
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- Link internal/buildcfg.ToolTags variable instead of hardcoding tool tags
- Add comprehensive test cases in demo.go to verify:
- build.Default.Compiler is correctly patched to "gc"
- ToolTags are properly populated from internal/buildcfg
- ReleaseTags are correctly generated
- Validates the go/build patches work as expected
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Add //go:build go1.23 constraint to skip compilation on Go 1.21/1.22
where runtime.(*Func).Name is not implemented in llgo, causing linker
errors when internal/bisect is pulled in as a dependency.
The demo works correctly on Go 1.23+ where the dependency chain or
internal/bisect behavior avoids calling the unimplemented method.
Fixes compatibility issue reported in PR review.
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- Moved full overlay file from runtime/_overlay/go/build/build.go to
runtime/internal/go/build/build.go to make it clearer what's being overridden
- Updated runtime/overlay.go to embed from new location
- Created demo under _demo/go/gobuild to demonstrate go/build package working with llgo
- The overlay still contains the full file but is now organized under runtime/internal
following the project's pattern for patched standard library packages
Fixes#1346
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- Fix line 67: Change unused variable 'n' to blank identifier '_'
- Fix line 102: Correct WriteByte call to expect only error return value
(WriteByte returns only error, not (int, error))
These fixes resolve the compilation errors reported by the CI.
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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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