The package makefile and component makefiles provide all the information required to read, write, build and install packages. If no packages are specified then all packages are operated on. The default with no arguments is host type . List description and components for package on the standard output. Note that individual components in package may contain additional or replacement notices.
Information is listed on a single line in attribute order.
The host name. The host type, usually in the form vendor . The main theme is that type names within a family of architectures are named in a similar, predictable style. OS point release information is avoided as much as possible, but vendor resistance to release incompatibilities has for the most part been futile. List the name, version and prerequisites for package on the standard output.