Additional options for the C compiler are best added to the OPT definition.
If you edit the toplevel Makefile it will be passed on to the lower level
Makefiles. You can also pass it to the make command at the top level,
e.g.
make OPT="-O -mt"
(presuming you want to keep the -O flag as well).
--Guido van Rossum <guido@CNRI.Reston.VA.US>
URL: http://www.cwi.nl/~guido/