//
//	$GOARCH
//		The execution architecture (arm, amd64, etc.)
//	$GOOS
//		The execution operating system (linux, windows, etc.)
//	$GOFILE
//		The base name of the file.
//	$GOLINE
//		The line number of the directive in the source file.
//	$GOPACKAGE
//		The name of the package of the file containing the directive.
//	$GOROOT
//		The GOROOT directory for the 'go' command that invoked the