the normal case when BUILDLINK_DEPENDS.<pkg> isn't specified, it receives
a value only once due to the multiple inclusion protection in the
bulldlink3.mk files. In the case where a package includes several
buildlink3.mk files that each want a slightly different version of another
dependency, having BUILDLINK_DEPENDS.<pkg> be a list allows for the
strictest <pkg> dependency to be matched.
This library is to encapsulate CD-ROM reading and
control. Applications wishing to be oblivious of the OS- and
device-dependant properties of a CD-ROM can use this library.
Some support for disk image types like BIN/CUE and NRG is available,
so applications that use this library also have the ability to read
disc images as though they were CD's.
