(As you may have noticed, the target hello in our previous example is also a phony target - there will never exist a file named hello.) This kind of target is called a phony target. The difference between the target clean and the other targets is that no file exists (nor will be created) with the name clean. You can name this target whatever you want, but the common praxis is to use the name clean. No particular file needs to exist to cleanup undesired files, which makes sense. To remove object files and the application executable, Emacs backup files etc., type make cleanĪs we can see, the target clean has no prerequisites. To build only the object files, type make main.o make hello.o make world.o or just make main.o hello.o world.o If the prerequisites already exist, make just links them together.īut if for example the file hello.o does not exist, make will look for the target hello.o, build it (which in this case means compiling hello.c) before it links the object files together.
To build the application, type make helloworld or (as helloworld is the first target) makeĪs we see, the target helloworld has 3 prerequisites, the object files main.o, hello.o, world.o. This Makefile has 5 targets, helloworld, main.o, hello.o, world.o, clean. Rm -rf *.o helloworld helloworld.exe *~ *.core core # Line starts with TAB! # The executable 'helloworld' depends on all 3 object files helloworld: main.o hello.o world.oĬc -o helloworld main.o hello.o world.o # Line starts with TAB! # Build main.o (only requires main.c to exist) main.o: main.cĬc -c main.c # Line starts with TAB! # Build hello.o (only requires hello.c to exist) hello.o: hello.cĬc -c hello.c # Line starts with TAB! # Build world.o (only requires world.c to exist) world.o: world.cĬc -c world.c # Line starts with TAB! # Remove object files, executables (UNIX/Windows), Emacs backup files, and core files (Otherwise, linking main.o will complain about missing references to the functions hello() and world(), while hello.o and world.o both will complain about a missing main() function.)Īnyhow, if we create our Makefile correctly, we don't have to bother about this: In this case, we can compile the 3 source files main.c, hello.c, and world.c separately, but we need all the object files to exist before we can link them together.
BASIC C MAKEFILE EXAMPLE HOW TO
Let's split up the previous C code in 3 files (create them in a new directory), just to see how to make can build them separately: Makefile for hello.c, world.c, and main.c profile without logging inĬonfigure X to handle non-English characters How to remove Emacs backup files in the current directory and all subdirectories using 'find' and 'rm' How to remove symbolic links in the current directory using 'find' and 'rm' How to keep a program running in the background using 'nohup'
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BASIC C MAKEFILE EXAMPLE DRIVER
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BASIC C MAKEFILE EXAMPLE WINDOWS
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