this module may be used to compile a kernel from a source-dir without
write permission on that directory. see make ktest for details

make menuconfig 
	removes and creates include/asm, compiles scripts/lxdialog/lxdialog
	and creates include/version.h, include/linux/autoconf.h
make dep
	compiles scripts/mkdep which creates .depend files anywhere and 
	one .hdepend file

make bzImage modules
	compiles and runs scripts/split-include which
	creates many headers within include/config
	touches other header files
	compiles all sources
