// internal linking.
func elfImportedSymbols(f *elf.File) []elf.ImportedSymbol {
	syms, _ := f.DynamicSymbols()
	var imports []elf.ImportedSymbol
	for _, s := range syms {
		if (elf.ST_BIND(s.Info) == elf.STB_GLOBAL || elf.ST_BIND(s.Info) == elf.STB_WEAK) && s.Section == elf.SHN_UNDEF {
			imports = append(imports, elf.ImportedSymbol{
				Name:    s.Name,
				Library: s.Library,
				Version: s.Version,
			})
		}
	}