"Major Component", in this context, means a major essential component
(kernel, window system, and so on) of the specific operating system
(if any) on which the executable work runs, or a compiler used to
produce the work, or an object code interpreter used to run it.

  The "Corresponding Source" for a work in object code form means all
the source code needed to generate, install, and (for an executable

pkg go/build, method (*Package) IsCommand() bool
pkg go/build, type Context struct
pkg go/build, type Context struct, BuildTags []string
pkg go/build, type Context struct, CgoEnabled bool
pkg go/build, type Context struct, Compiler string
pkg go/build, type Context struct, GOARCH string
pkg go/build, type Context struct, GOOS string
pkg go/build, type Context struct, GOPATH string
pkg go/build, type Context struct, GOROOT string

pkg runtime (windows-386), const GOARCH = "386"
pkg runtime (windows-386), const GOOS = "windows"
pkg runtime (windows-amd64), const GOARCH = "amd64"
pkg runtime (windows-amd64), const GOOS = "windows"
pkg runtime, const Compiler = "gc"
pkg runtime, func BlockProfile([]BlockProfileRecord) (int, bool)
pkg runtime, func SetBlockProfileRate(int)
pkg runtime, method (*BlockProfileRecord) Stack() []uintptr
pkg runtime, type BlockProfileRecord struct