ggc2b: compiler code for the omron.
gcc-1.37: version 1.37 of gcc. Currently, object (@sys) directories
          have links for gcc & mips-tfile to version 2.1 programs.
gcc-2.1: version 2.1 of gcc. Modified makefile, gcc, mips-tfile to 
         invoke version 1.37 code for cpp and cc1.
