Dhiman, Gaurav (Gaurav.Dhiman@ca.com) wrote:
>
> Hi,
>
> I tried what you suggested, but when I run that command it gives a lot
> of linking errors saying multiple definations of functions.
>
> I looked for the same on net and found one simple makefile containing
> the following command for linking:
>
> ld -m elf_i386 -r -o pipe.c fifo.c msg_q.c main.c
>
> When I include this linking command in my Makefile, it does not give any
> error and creates the corresponding .o file for each .c file but does
> not create the single relocatable object file through which I can load
> or unload the module. I do not get any error with following makefile,
> but at the same time it does not link the .o file to make final module.
> Please let me know what the problem is
>
> Also please explain me about -m option of 'ld', whats the use of this
> option ?
>
> I am pasting below my Makefile for your reference
>
> ******************************************
> Makefile - Starts
> ******************************************
>
> KERNELDIR = /usr/src/linux-2.4
>
> CC = gcc
>
> include $(KERNELDIR)/include/linux/config.h
>
> CFLAGS = -I$(KERNELDIR)/include -D__KERNEL__ -DMODULE \
> -O -Wall -c
>
> LFLAGS = -m elf_i386 -r -o
OBJ=main.o pipe.o fifo.o msg_q.o
>
> ifdef CONFIG_SMP
> CFLAGS += -DSMP
> endif
>
> all: driver.o
>
> driver.o: main.o pipe.o fifo.o msg_q.o
> ld $(LFLAGS) main.o pipe.o fifo.o msg_q.o
ld $(LFLAGS) $(OBJ) -o $@
instead of :
> main.o: main.c
> $(CC) $(CFLAGS) main.c
>
> fifo.o: fifo.c
> $(CC) $(CFLAGS) fifo.c
>
> pipe.o: pipe.c
> $(CC) $(CFLAGS) pipe.c
>
> msg_q.o: msg_q.c
> $(CC) $(CFLAGS) msg_q.c
put :
.c.o: $(OBJ)
$(CC) $(CFLAGS) -c $<
It is only esthetic :)
>
> #all: main.o pipe.o fifo.o msg_q.o
> # $(CC) $(CFLAGS) main.c pipe.c fifo.c msg_q.c
>
> clean:
> rm -f *.o *~ core
>
> ******************************************
> Makefile - Ends
> ******************************************
--
Amicalement
Christophe
* GNU/Linux & UNIX developer and network administrator
* Membre RotomaLUG (http://www.rotomalug.org)
* Registered User #271267
* Email: c.lucas@ifrance.com
* Web Site: http://odie.mcom.fr/~clucas/
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