MyMake

Purpose of Program

The purpose of this program is to emulate the Make utility. It does this by building executable programs or librarys from source files specified in a makefile. The program does this by parsing a makefile, and then builds the targets from themakefile using fork, exec, and wait.

How to compile program

This is the shell command to compile the program: ~$ gcc -o mymake mymake.c util.c 

How to use the program from the shell

This is the shell command to use the program: ./mymake Default behavior executes the first target of the makefile "Makefile"

./mymake may be used with the following options.

Supported Options

1. -f filename: filename will be the name of the makefile, otherwise the default name ’Makefile’ is assumed.
2. -n: Only displays the commands that would be run, doesn’t actually execute them. 
3. -B: Do not check timestamps for target and input (i.e. always recompile).
4. -m log: The log from make4061 will be stored on file log

Note: options can be combined together as e.g. 

./mymake -f <makefile> <specificTarget> -m <output>

Makefile Format

1. The target line starts on the first character of a line.
2. ”:” will follow the target and list of dependencies with one or more spaces between them will follow ”:”.
3. A target is not required to have a dependence
4. A target will have at most one command (possibly none).
5. Command line always starts with a tab but not spaces.
6. Commands can be any executable Linux program or shell command.
7. Lines that do not start with a target, or commands that do not start with a tab are not valid, and make4061 will be terminated.
8. Lines that start with a ”#” will be commented out and ignored.
9. Duplicated target name is not allowed.

 Authored with Kyle Gee while at the University of Minnesota - Twin Cities.