+ifdef BACKLIGHT_ENABLE
+ SRC += $(COMMON_DIR)/backlight.c
+ OPT_DEFS += -DBACKLIGHT_ENABLE
+endif
+
+ifdef KEYMAP_SECTION_ENABLE
+ OPT_DEFS += -DKEYMAP_SECTION_ENABLE
+ EXTRALDFLAGS = -Wl,-L$(TOP_DIR),-Tldscript_keymap_avr5.x
+endif
+
+# Version string
+OPT_DEFS += -DVERSION=$(shell (git describe --always --dirty || echo 'unknown') 2> /dev/null)
+