From e8a821c564a3615ac36840f8e20e3fb7704a906d Mon Sep 17 00:00:00 2001
From: Alex Turbov <i.zaufi@gmail.com>
Date: Mon, 18 Jun 2018 03:46:21 +0300
Subject: [PATCH] Define `KERNEL_DIR` onece and use it.

Having the `KERNEL_DIR` make it possible  to "override" it via
CLI (it'll help to build this module for Gentoo using "standard"
`linux-mod.eclass`).

Also, enclose `$(PWD)` into quotes because it may have spaces
(being cloned into developer's machine).
---
 Makefile | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index c43dcfd..e151d35 100644
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,8 @@
 obj-m := system76.o
-KVERSION := $(shell uname -r)
+KERNEL_DIR = /lib/modules/$(shell uname -r)/build
 
 all:
-	$(MAKE) -C /lib/modules/$(KVERSION)/build M=$(PWD) modules
+	$(MAKE) -C "$(KERNEL_DIR)" M="$(PWD)" modules
 
 clean:
-	$(MAKE) -C /lib/modules/$(KVERSION)/build M=$(PWD) clean
+	$(MAKE) -C "$(KERNEL_DIR)" M="$(PWD)" clean