Makefile Help

[josiah]

Hello again guys. I would just like to ask for some help regarding the makefile I used for the inttohex program. It would not work and it would just say Missing separator. Stop..

Hope somebody could help. Here's the makefile:

# makefile for exercise on linked lists, files, searching and sorting
CC=gcc
CFLAGS=-g -W -Wall -I.
OBJECTS=inttohex.o
HEADERS=
PROGNAME=inttohex

$(PROGNAME): $(OBJECTS)
        $(CC) $(CFLAGS) $(OBJECTS) -o $(PROGNAME)

inttohex.o: inttohex.c $(HEADERS)
        $(CC) -c $(CFLAGS) -o inttohex.o


.PHONY: clean ctags

tags: ctags

ctags:
        ctags -R

clean:
        rm -rf $(OBJECTS) $(PROGNAME)

[karas]

That's because you're using spaces instead of tabs in lines where command has to be executed. For example

        $(CC) $(CFLAGS) $(OBJECTS) -o $(PROGNAME)

must be indented with tab not with 8 spaces.
Beside this, in the line

        $(CC) -c $(CFLAGS) -o inttohex.o

you are not giving the source file to the compiler, so it cannot compile. Add inttohex.c after -c flag:

         $(CC) -c inttohex.c $(CFLAGS) -o inttohex.o

Maybe there are more errors, that's what I saw immediately.

[dwks]

You shouldn't need to pass -r to rm, because I don't think it's going to be passed any directories.

Also, there is an implicit rule to compile .c files into .o files, so you can just use this:

inttohex.o: inttohex.c $(HEADERS)

leaving out the "$(CC) -c $(CFLAGS) -o inttohex.o".

[laserlight]

Moved to Tech Board since it does not directly concern C programming.