o include-based build rather than sourced-based build

Age	Commit message (Expand)	Author
2017-04-21	gbuild: Remove MSVC 2013 legacy code	David Ostrovsky
Norbert Thiebaud
2011-12-07	in modules, when we have a env we are in stage gbuild	Bjoern Michaelsen
2011-11-29	move reconfigure into gbuild	Bjoern Michaelsen
2011-11-25	make gbuild makefiles run independant of pwd again	Bjoern Michaelsen
2011-11-16	tweak gbuild standart Makefile to allow partial build in unsourced env	Norbert Thiebaud