(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.

(2)  If you wish to build only the F77 interface, you can specify
     "make F77lib".  To build only the C interface, "make Clib".
     make with no arguments builds both the fortran and C interfaces
     (this is highly recommended).

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

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