Gcc and make not producing executable

[Peter Boosten]

Eduardo Cerejo wrote:
> Objective is to create a makefile which will create an executable named main.  The books has this code in the Makefile:
> 
> CC=gcc
> CFLAGS=-Wall
> main: main.o hello_fn.o
> 
> clean:
>         rm -f main main.o hello_fn.o
> 
> The book says this should create two object files named main.o and hello_fn.o plus an executable named main.  

gmake does the trick.

Otherwise your Makefile should look like this:

<begin Makefile>
main: main.o hello_fn.o
         gcc main.o hello_fn.o -o main

main.o: main.c
         gcc -c main.c

hello_fn.o: hello_fn.c
         gcc -c hello_fn.c


clean:
         rm -f main *.o

<end Makefile>

Or easier:

<begin Makefile>
CC=gcc

main: main.o hello_fn.o
         $(CC) main.o hello_fn.o -o main

.c.o:
         $(CC) $(CFLAGS) -c $<


clean:
         rm -f main *.o
<end Makefile>

Peter


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