[M3commit] CVS Update: cm3

[Mika Nystrom]

CVSROOT:	/usr/cvs
Changes by:	mika at birch.	11/02/15 04:02:59

Modified files:
	cm3/m3-sys/cm3/src/: Builder.m3 Makefile.m3 

Log message:
	parallel back-end builds.
	
	To enable, use -pb <n> flag, with n up to about ten (10) times the number of processors available, or set M3_PARALLEL_BACK in config files.
	
	Any change in behavior relative to earlier versions with n = 1 (the default) would constitute a bug.