Make your compiler generate working code that runs. The file
chap12/runtime.c is a C-language file contain-ing several
external functions useful to your MiniJava program. These are
generally reached by externalCall from code generated by your
compiler. You may modify this as necessary. Write a module Main that
calls on all the other modules to produce an assembly language file
prog.s for each input program prog.java. This assembly language
program should be assembled (producing prog.o) and linked with
runtime.o to produce an executable file.