Hi all, I tried, as beginner, to compile a simple module downloaded by internet, hello_printk, I am using ArchLinux and I followed the simplest way for compile a new kernel tree from here : https://wiki.archlinux.org/index.php/Kernels/Compilation/Arch_Build_System But when I try to compile I catch these errors: echo >&2 " ERROR: Kernel configuration is invalid."; \ echo >&2 " include/generated/autoconf.h or include/config/auto.conf are missing.";\ echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ echo >&2 ; \ /bin/false) Of course I checked the path of the kernel and under the directory wrote on the error messages I can find the files autoconf.h and auto.conf that I really don't understand what could be wrong, the makefile is really really simple then I can post it: obj-m := hello_printk.o KDIR ?= mypersonalpath/core/linux/src/linux-3.7 PWD := $(shell pwd) default: $(MAKE) -C $(KDIR) M=$(PWD) modules Someone can help me ? Pietro Paolini pulsarpietro@aol.com