Is it possible to set CFLAGS to a linux kernel module Makefile?

Question

Eg: a common device module\'s Makefile

obj-m:=jc.o

default:
    $(MAKE) -C /lib/modules/$(shell uname -r)/build M=$(shell pwd) modules
clean:
    $(MAKE) -C         


        

Answer 1

You can also use

ccflags-y := -O2

This will be applied to all of the source files compiled for your module with the Makefile. This is indirectly documented in the link provided by eepp in Section 4.2