Hey Everyone,

The last couple of days i'm have been trying to do some linux kernel module programming. I was trying to compile the first example "hello1". The makefile consist of the following :

TARGET := hello-1
WARN := -W -Wall -Wstrict-prototypes -Wmissing-prototypes
INCLUDE := -isystem /lib/modules/`uname -r`/build/include
CFLAGS := -O2 -DMODULE -D__KERNEL__ ${WARN} ${INCLUDE}
CC := gcc-3.0

${TARGET}.o: ${TARGET}.c

.PHONY: clean

clean:
rm -rf {TARGET}.o

A week ago when i type the command "make" everything went well. I had problems inserting this module with insmod. I decided to change the makefile and compile it again. But now i'm getting error message "gcc command cannot be found ". I updated redhat before I got this error message. I check to to see if the gcc version is the same as in the makefile, which was not the case. I change the line "CC:= gcc-3.0 to gcc-3.2.2" but i'm still getting the same error message. Can someone tell me what i am doing wrong? I have redhat 9.0

Is there any reason why you're using a specific version of gcc?
Try leaving it on
CC:= gcc

I tried leaving the 3.0 out but now i getting the following error message " cannot specify -o with -c or -S and multiple compilations"

I'm follwing the examples that are written in the document. http://www.faqs.org/docs/kernel/x204.html

Are you using the same makefile?

There is no -o
in the makefile you posted.

I'm using the same makefile only the name of the target is different

According to me, the line "${TARGET}.o: ${TARGET}.c" specifies the name of the input and the output file.

At the top of the makefile has "TARGET := hello-1".

I could be wrong what i just said but reading it i would think that line specifies the -o

I copy and pasted your makefile, seems to work ok for me.

Strange... That it doesn't work with me.. If anyone have suggestions let me know.. i'll continue to solve this mysterious error...

It works fine now.. I remember a few weeks ago i compiled it i use gcc command, seeing that it was C-file. Now compiling the hello.c with the makefile. it cause conflict with the old output file, which was still in the directory.

Beginners mistake..