How do I run a makefile file?
Also you can just type make if your file name is makefile/Makefile . Suppose you have two files named makefile and Makefile in the same directory then makefile is executed if make alone is given. You can even pass arguments to makefile.
Should I use makefile?
A makefile is useful because (if properly defined) allows recompiling only what is needed when you make a change. In a large project rebuilding the program can take some serious time because there will be many files to be compiled and linked and there will be documentation, tests, examples etc.
How to tell which file to use as makefile?
You can use this, for example, to find out in one go which source files fail to compile. 2) -n , which tells make to print out what it would have done without actually doing it. 3) -f ,which allows you to tell make which file to use as its makefile.
What happens when you make a comment in makefile?
The make command has read your makefile, determined the minimum number of commands required to rebuild myapp , and carried them out in the correct order. Now see what happens if you delete an object file: Again, make correctly determines the actions required. A comment in a makefile starts with # and continues to the end of the line.
How to make the first target in makefile?
$make -f Makefile1 make: *** No rule to make target ‘main.c’, needed by ‘main.o’. Stop. $ The make command has assumed that the first target in the makefile, myapp , is the file that you want to create.
Can you make more than one makefile at a time?
You can have many different makefiles on your machine at any one time. Indeed, if you have a large project, you may choose to manage it using separate makefiles for different parts of the project. The combination of the make command and a makefile provides a very powerful tool for managing projects.