This changes the buildlink3.mk files to use an include guard for the
recursive include. The use of BUILDLINK_DEPTH, BUILDLINK_DEPENDS,
BUILDLINK_PACKAGES and BUILDLINK_ORDER is handled by a single new
variable BUILDLINK_TREE. Each buildlink3.mk file adds a pair of
enter/exit marker, which can be used to reconstruct the tree and
to determine first level includes. Avoiding := for large variables
(BUILDLINK_ORDER) speeds up parse time as += has linear complexity.
The include guard reduces system time by avoiding reading files over and
over again. For complex packages this reduces both %user and %sys time to
half of the former time.
Graphite is a smart font engine that basically takes a unicode string
and font formatting information (features, size, etc.) and returns a
set of positioned glyphs. In reality, Graphite does more than this in
that it handles cursor tracking and interaction with the rendering
engine for string selection, etc.
This package is a wrapper for Xft.
