The Makefiles

Makefiles play an essential role in compiling the Nachos project. There are Makefiles in the Nachos root directory, as well as an individual Makefile within each assignment subdirectory. The Makefiles in the Nachos root directory and their purpose are

Makefile

This file enters each assignment subdirectory and attempts to perform a gmake depend and a gmake nachos.

Makefile.common

This file lists all of the files that are to be compiled, which header files are used for each assignment, and the object files that will be produced. Depending upon the assignment interdependencies, the files for more than one assignment may be compiled. For example, compiling the Multiprogramming assignment would use files for both Thread Management and Multiprogramming.

Makefile.dep

This file contains machine dependcies for the hardware on which Nachos will be compiled and ran. You should not need to modify this file.

include ../Makefile.common
include ../Makefile.dep
#-----------------------------------------------------------------
# DO NOT DELETE THIS LINE -- make depend uses it
# DEPENDENCIES MUST END AT END OF FILE

Using Gmake

When running gmake, there are four cases that will occur. Those are

• gmake from the main nachos directory, the system will change to each assignment directory and attempt to run gmake depend and then gmake within the directory.
• gmake clean from the main nachos directory will cause all .o, nachos, core, DISK, and other files created by compiling nachos.
• gmake when run from one of the assignment directories will compile and build the nachos executable for that assignment.
• gmake depend run from one of the assignment directories will rebuild the file dependencies (determine which .h files are required by each .cc file) for that assignment. This is usefule when the #include files have been added to or removed from source files.