CODEWITHSUNDEEP
cmakefile
Thapipo
Thapipo

Reputation: 311

c makefile - no input file

So here my code for a makefile :

    CC=gcc 
    CFLAGS= -g -W -Wall -o
    EXEC=program
    all :   $(EXEC)
    program:    apple.o cream.o cake.o  program.o
                $(CC)   $(CFLAGS)   program apple.o cream.o cake.o  program.0

    program.o:  program.c   apple.o cream.o cake.o
                $(CC)   $(CFLAGS)   program.c

    apple.o:    apple.c apple.h
                $(CC)   $(CFLAGS)   apple.c apple.h

    cream.o:    apple.o cream.c cream.h
                $(CC)   $(CFLAGS)   cream.c cream.h

    cake.o:     cake.c  cake.h  cream.o apple.o
                $(CC)   $(CFLAGS)   cake.c  cake.h
clean:
    -rm -rf *.o $(EXEC)

And im stuck with an error : *gcc: no input file make: *[program.o] Error 1***

Just to let you know.

I want to be able to create a makefile that will produce my exec 'program'. And i've read that i can use de -I flag which will look into the directory for the include header. But when i add the -I in my CFLAGS, it's getting worst

Thank you very much.

Upvotes: 0

Views: 2949

Answers (1)

paxdiablo
paxdiablo

Reputation: 881323

CFLAGS= -g -W -Wall -o
:
program.o:  program.c   apple.o cream.o cake.o
    $(CC)   $(CFLAGS)   program.c

The problem (one of them) lies there.

Since CFLAGS ends with -o, the specification for the output file, the command ends up being:

gcc -g -W -Wall -o program.c

In other words, you're specifying program.c as the output file and providing no input file.

You need to specify the output file with something like:

program: program.c apple.o cream.o cake.o
    $(CC) $(CFLAGS) program program.c apple.o cream.o cake.o

(though there are probably better ways to do this by using the meta-variables provided by make).

You also seem to be under some confusion about the compilation process. Despite the fact your rule is for building the object file program.o, the compiler options you have will try to generate a final executable (since they do not have -c).

Upvotes: 2

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