remove the bar
Undo revert "Makefile rewritten to support multiple sources"

This reverts commit aeab25532989f88db3915d5c99320ebb07e41f79.

Conflicts:
	Makefile
Undo revert "remove non-default platform makefiles"

This reverts commit a9c34591ce4bf073eafa6028efc85ee31dcad8c5.