Makefile executable not generated - makefile

Question

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 ?

Answer 1

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