Question

I have the following: a .c code, a .h code plus a .o file and a -lib… library. When I compile the c code with gcc I do:

gcc code.c -o code file.o -library

How to create a makefile?

I currently have with autoconf and automake?

I currently have:

Makefile

all: 
  gcc code.c -o code file.o -library

clean:

 rm -f code

When I compile make I get:

make: Nothing to be done for `all'.

Need some help. Thx

Answer 1

I’m sorry I have to give this answer, but have you tried https://www.google.com/search?q=makefile+tutorial?

Pick one, and learn how to create a Makefile. You don’t need the autotools.

It took me 5 minutes to come up with this, by reading Makefile Tutorial:

CC=gcc
CFLAGS=-Wall
CLIBS=-lX11
OUT=code
OBJS=code.o file.o


$(OUT): code.o file.o
    $(CC) $(CFLAGS) $(CLIBS) -o $(OUT) $(OBJS)
code.o: code.c
    $(CC) $(CFLAGS) -c code.c -o code.o
file.o: file.c
    $(CC) $(CFLAGS) -c file.c -o file.o

.PHONY: clean

clean:
    rm -rf *.o $(OUT)

If on the computer the -library doesn t exist I want to install it automatically.

This is specific to the distribution used and you need root access on the machine. Doing it like this is not how it’s done. Instead, you should create a package specific for your distribution where you specify the dependencies.

For instance, for Ubuntu (since it’s the most used distribution), you’d create a .deb file: http://wiki.debian.org/IntroDebianPackaging

This, however, has nothing to do with your initial question.