darwin: ld64.lld undefined symbol internal/reflectlite.TypeOf in waitgroup/goexit

[luoliwoshang]

Summary

On macOS (darwin), llgo run can fail with linker errors for internal/reflectlite symbols.

Affected cases

• cl/_testlibgo/waitgroup
• TestRunFromTestgo/goexit (or direct run in cl/_testgo/goexit)

Reproduction

cd cl/_testlibgo/waitgroup
llgo run in.go

and

cd cl/_testgo/goexit
llgo run in.go

Actual

ld64.lld: error: undefined symbol: internal/reflectlite.TypeOf
>>> referenced by ... (symbol errors.init+0x83)

ld64.lld: error: undefined symbol: internal/reflectlite.init
>>> referenced by ... (symbol errors.init+0x19)

clang++: error: linker command failed with exit code 1
exit status 1

Expected

Both cases should build and run (or fail with a deterministic, expected test reason), but should not fail with undefined internal reflectlite symbols at link time.

Notes

This issue is reported from branch/environment where TestRunFromTestgo/goexit and waitgroup recheck is being done.