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.
Provided by MAINTAINER, Jaap Boender in PR 35942.
CHANGES:
0.4.1 (2007-02-21)
=====
* file_descr_of_socket is not marked as deprecated anymore.
* Patched the Makefile to be compatible with FreeBSD (thanks Jaap Boender).
* Explicitely link with libcrypto since we use it. Compilation should now work
on Mac OS X too (thanks Janne Hellsten).
