Log message:
Set BUILDLINK_ABI_DEPENDS correctly (with +=, not ?=)
It turns out there were a lot of these.

Log message:
Recursive bump for graphics/freetype2 buildlink addition.

Log message:
Update silgraphite{,-ft,-xft} to 2.3.1.

Mostly bug fixes.

Log message:
Simply and speed up buildlink3.mk files and processing.
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.

Log message:
Add PKG_DESTDIR_SUPPORT.

Log message:
Import silgraphite-ft from pkgsrc.

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 FreeType.