CURDIR it has been built without an obj directory; however if it is in
neither of those places, we expect it to be in DESTDIR.
Yes Bruce, I know this is broken because the host is not supposed to be
the same as the target, but we need to get the hosted build working
properly first before even attempting a cross compiled operating
system build. That will need to concept of TOOLSDIR or something that
can be mapped to DESTDIR in the case of a hosted build and set to the
installed tools in a cross compiled build. Later, later, later!
perl executable from overriding the object directory path search where
perl is most likely to be. Most people haven't seen this because it
defaulted to /usr/bin/perl which might be OK as a fallback, but when
bootstrapping a new version (or the *first* version on alpha), we don't
really want to use /usr/bin/perl.
interpret it. I've preserved the bugs that perl must be installed
to build part of perl and that it must be installed in the wrong place
(no ${DESTDIR}).
