Hi,

I'm trying to compile a linux kernel module using a Makefile which looks like so:

obj-m += main.o

all:
    make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules

clean:
    make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean

and i'm getting the following warning: main.c:54: warning: ISO C90 forbids mixed declarations and code

I need to switch to C99.

After reading i noticed i need to add a flag -std=c99, not sure where it suppose to be added.

How do I change the Makefile so it will compile through C99 ?

Thanks!