From e5726b017a9de2922ea923818c6e215600f68a85 Mon Sep 17 00:00:00 2001
From: Fred Sundvik <fsundvik@gmail.com>
Date: Wed, 6 Jul 2016 15:36:45 +0300
Subject: [PATCH] Add setting of the master side to the makefile

---
 Makefile           | 14 ++++++++++++++
 tmk_core/common.mk |  9 +++++++++
 2 files changed, 23 insertions(+)

diff --git a/Makefile b/Makefile
index cfbe0e994d7..7c00ce2cc88 100644
--- a/Makefile
+++ b/Makefile
@@ -59,6 +59,12 @@ ifndef KEYBOARD
 	KEYBOARD=planck
 endif
 
+MASTER ?= left
+ifdef master
+	MASTER = $(master)
+endif
+
+
 # converts things to keyboards/subproject
 ifneq (,$(findstring /,$(KEYBOARD)))
 	TEMP:=$(KEYBOARD)
@@ -212,6 +218,14 @@ ifeq ($(strip $(SERIAL_LINK_ENABLE)), yes)
 	VAPTH += $(SERIAL_PATH)
 endif
 
+ifeq ($(MASTER),right)	
+	OPT_DEFS += -DMASTER_IS_ON_RIGHT
+else 
+	ifneq ($(MASTER),left)
+$(error MASTER does not have a valid value(left/right))
+	endif
+endif
+
 # Optimize size but this may cause error "relocation truncated to fit"
 #EXTRALDFLAGS = -Wl,--relax
 
diff --git a/tmk_core/common.mk b/tmk_core/common.mk
index d71fba9bc19..5bae0d762f4 100644
--- a/tmk_core/common.mk
+++ b/tmk_core/common.mk
@@ -97,6 +97,15 @@ ifeq ($(strip $(KEYMAP_SECTION_ENABLE)), yes)
     endif
 endif
 
+ifeq ($(MASTER),right)	
+	OPT_DEFS += -DMASTER_IS_ON_RIGHT
+else 
+	ifneq ($(MASTER),left)
+$(error MASTER does not have a valid value(left/right))
+	endif
+endif
+
+
 # Version string
 OPT_DEFS += -DVERSION=$(shell (git describe --always --dirty || echo 'unknown') 2> /dev/null)