go/src/cmd/internal/pkgpath/pkgpath.go

// ToSymbolFunc returns a function that may be used to convert a
// package path into a string suitable for use as a symbol.
// cmd is the gccgo/GoLLVM compiler in use, and tmpdir is a temporary
// directory to pass to os.CreateTemp().
// For example, this returns a function that converts "net/http"
// into a string like "net..z2fhttp". The actual string varies for
// different gccgo/GoLLVM versions, which is why this returns a function
// that does the conversion appropriate for the compiler in use.
func ToSymbolFunc(cmd, tmpdir string) (func(string) string, error) { … }

const mangleCheckCode …

// toSymbolV1 converts a package path using the original mangling scheme.
func toSymbolV1(ppath string) string { … }

// toSymbolV2 converts a package path using the second mangling scheme.
func toSymbolV2(ppath string) string { … }

var v3UnderscoreCodes …

// toSymbolV3 converts a package path using the third mangling scheme.
func toSymbolV3(ppath string) string { … }