referenced only by their basename and not by their full pathname. This
breaks when .PATH or MAKEOBJDIR are used. There might be Makefiles around
that try to work around this bug by prepending ${.CURDIR} to the sources,
and they should be found and fixed. Also a lot of the gunk in suff.c that
was attempting to work around the same problem could be removed.
1. Honor environment variable $MACHINE if set over uname.machine
2. archives with :: are always out of date, even when they have no children.
3. VAR= a b c # comment, gets the trailing blanks trimmed, unless
escaped by \. I'll have to read the posix manul to make sure that it
is ok to handle escapes here.
christos