Cfrgtkky

CC=g++ 

CFLAGS=-c -o 

PROG=craps 

LIBSRCS=craps.cpp craps_game.cpp craps_helper.cpp craps_io.cpp

LIBOBJS=$(patsubst %.cpp, %.o, $(LIBSRCS)) 

LIBCRAPS=craps 

CXXFLAGS=-I./ -fpic 

LDFLAGS=-L./ 



all: $(PROG) 



$(PROG): $(LIBSRCS) 

       $(CC) $(LDFLAGS) -l$(PROG) -o $(PROG) $(PROG).o 



$(LIBCRAPS): $(LIBOBJS) 

       $(CC) -shared -o lib$(LIBCRAPS).so $(LIBOBJS) 



%.o: %.cpp 

     $(CC) $(CXXFLAGS) -c -o $@ $ 



depend:

    ${CC} -MM ${PROG}.cpp ${LIBSCRS} > depends.mak



include depends.mak

Why executable file not compiled and generated?

All o files generated with no error.

Why this line $(CC) $(LDFLAGS) -l$(PROG) -o $(PROG) $(PROG).o does not run ? what is wrong ?

You misunderstood my comment. I'm saying this this:

PROG=craps LIBSRCS=craps.cpp craps_game.cpp craps_helper.cpp craps_io.cpp

is wrong. You can't assign two variables on the same line, in a makefile. These variables must look like this:

PROG=craps

LIBSRCS=craps.cpp craps_game.cpp craps_helper.cpp craps_io.cpp

I'm asking, is the latter how your actual makefile looks, or is the example you provided here just inaccurate.

Also these rules both have incorrect newlines:

 $(PROG): 

           $(LIBSRCS) $(CC) $(LDFLAGS) -l$(PROG) -o $(PROG) $(PROG).o 



 $(LIBCRAPS):  

           $(LIBOBJS) $(CC) -shared -o lib$(LIBCRAPS).so $(LIBOBJS) 

You are adding the prerequisite lists $(LIBSRCS) and $(LIBOBJS) into the recipe (shell commands) used to build the target. Prerequisites must be on the same line as the target. These should look like this:

 $(PROG): $(LIBSRCS)

           $(CC) $(LDFLAGS) -l$(PROG) -o $(PROG) $(PROG).o 



 $(LIBCRAPS): $(LIBOBJS)

           $(CC) -shared -o lib$(LIBCRAPS).so $(LIBOBJS) 

This is your problem, below

Finally, you can't have both the program and the target have the same name:

PROG=craps

LIBCRAPS=craps

You can only create one target with a given name so the value of both these variables cannot be craps. Maybe you wanted:

PROG = craps

LIBCRAPS = libcraps.so

Assuming the makefile you've quoted here is identical to what you're running, you must be getting warnings like this from make when you run this makefile:

 Makefile:15: warning: overriding recipe for target 'craps'

 Makefile:12: warning: ignoring old recipe for target 'craps'

These warnings are why you are not seeing the compile rule invoked: the library rule is overriding it just as the warning says.

Also, you should have the program depend on the library (since it links it) and the object file $(PROG).o because currently make doesn't know it needs to be built. And you don't need to have it depend on all the source files. You want something like:

$(PROG): $(LIBCRAPS) $(PROG).o

        $(CC) $(LDFLAGS) -l$(PROG) -o $(PROG) $(PROG).o