| bufio | Package bufio implements buffered I/O. It wraps an io.Reader or io.Writer object, creating another object (Reader or Writer) that also implements the interface but provides buffering and some help for textual I/O. |
| cmd/internal/objfile | Package objfile implements portable access to OS-specific executable files. |
| cmd/internal/telemetry | Package telemetry is a shim package around the golang.org/x/telemetry and golang.org/x/telemetry/counter packages that has code build tagged out for cmd_go_bootstrap so that the bootstrap Go command does not depend on net (which is a dependency of golang.org/x/telemetry/counter on Windows). |
| flag | Package flag implements command-line flag parsing. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| log | Package log implements a simple logging package. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| sort | Package sort provides primitives for sorting slices and user-defined collections. |