CVS log for pkgsrc/devel/compiz-bcop/buildlink3.mk

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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.

-make this a build dependency by default, if is used to generate source
 code during the build (if at all - currently it is unused unless
 someone patches xml metadata in compiz plugin sources)
-it needs bash and GNU getopt to work correctly

Import compiz-bcop:

Compiz is a compositing window manager that uses 3D graphics acceleration
via OpenGL. It provides various new graphical effects and features on
any desktop environment, including Gnome and KDE.

This package contains the compiz option code generator.

Initial revision