Anatomy of a Makefile

 
# Makefile for kp archive   	Define a lists of object files.   
LIBOBJ = albmom.o energy.o prntio.o   	   
OBJ = kp.o bimom.o handle.o graf.o   	   
FC = f77   	Define the Fortran Compiler.   
FFLAGS = -O $(DEBUG)    	Define flags for Fortran compiler   
all: kplib.a kp kabs   	Define dummy target all.   
kp: $(OBJ) kplib.a   	kp depends on all   
  	files defined inOBJ and kp library.  
    $(FC) $(FFLAGS) -o kp $(OBJ) kplib.a   	  
kplib.a: $(LIBOBJ)   	To make the kp library,   
    ar r kplib.a $(LIBOBJ)   	use the ar command.    
kabs:   	To make kabs,   
    cd kabs; make kabs   	change directory & issue make.   
clean:   	Dummy target for   
    /bin/rm *.o   	 cleaning up the directory.   

Notice that make with no options uses the first target in the makefile. Traditionally, there is a dummy target called all and we have defined an all above. After that, we change to the directory kabs, which contains a makefile, and issue make.