re: Parallel build failure on OSX

[matthew green <mrg%eterna.com.au@localhost>]

isn't this really a problem that some directories are listed 
multiple times in the normal build path?  eg, if you run
"make obj" from the toplevel, it traverses both "lib" and
"external/bsd", and to lose this race, if both instances
of these that eventually call into lib/libarchive_fe at the
same time, and thus interfere with each other.

the -p option may be reasonable, but this does seem like it
has pointed out a real problem.


.mrg.