(1)  To compile, just go to the BLACS directory you want to build,
     and type "make".  You must first edit and correct the file
     BLACS/Bmake.inc.  Sample Bmake.inc's can be found in the
     BLACS/BMAKES directory.  See the paper "Installing and Testing the BLACS"
     for details.

(2)  Type "make clean" to get rid of old .o files.

(3)  All of this may be done from the top-level makefile.
