* SUBDIR += this
* SUBDIR += that
* SUBDIR += the_other
* SUBDIR += foobar
Actually I thought about this before when I was cleaning up the
Makefiles, the reason why I didn't want to go for it at that time was
because I thought it will make the subdir Makefiles too long and
scroll off my screen.
This is a good idea!
Also, it will make it easier when we formally support the RESTRICTED
and BROKEN keywords, as we can do something like