build: added ERLE build type

mk/apm.mk

@@ -38,6 +38,10 @@ ifeq ($(HAL_BOARD),HAL_BOARD_LINUX)
 include $(MK_DIR)/board_linux.mk
 endif
 
+ifeq ($(HAL_BOARD),HAL_BOARD_ERLE)
+include $(MK_DIR)/board_linux.mk
+endif
+
 ifeq ($(HAL_BOARD),HAL_BOARD_PX4)
 include $(MK_DIR)/board_px4.mk
 endif

mk/environ.mk

@@ -138,6 +138,10 @@ ifneq ($(findstring linux, $(MAKECMDGOALS)),)
 HAL_BOARD = HAL_BOARD_LINUX
 endif
 
+ifneq ($(findstring erle, $(MAKECMDGOALS)),)
+HAL_BOARD = HAL_BOARD_ERLE
+endif
+
 ifneq ($(findstring vrbrain, $(MAKECMDGOALS)),)
 HAL_BOARD = HAL_BOARD_VRBRAIN
 endif

mk/targets.mk

@@ -27,6 +27,10 @@ linux: HAL_BOARD = HAL_BOARD_LINUX
 linux: TOOLCHAIN = NATIVE
 linux: all
 
+erle: HAL_BOARD = HAL_BOARD_ERLE
+erle: TOOLCHAIN = NATIVE
+erle: all
+
 empty: HAL_BOARD = HAL_BOARD_EMPTY
 empty: TOOLCHAIN = AVR
 empty: all
@@ -40,7 +44,7 @@ empty: all
 
 # cope with copter and hil targets
 FRAMES = quad tri hexa y6 octa octa-quad heli single
-BOARDS = apm1 apm2 apm2beta apm1-1280 px4 px4-v1 px4-v2 sitl flymaple linux vrbrain vrbrain-v40 vrbrain-v45 vrbrainv-50 vrbrain-v51 vrubrain-v51 vrhero-v10
+BOARDS = apm1 apm2 apm2beta apm1-1280 px4 px4-v1 px4-v2 sitl flymaple linux vrbrain vrbrain-v40 vrbrain-v45 vrbrainv-50 vrbrain-v51 vrubrain-v51 vrhero-v10 erle
 
 define frame_template
 $(1)-$(2) : EXTRAFLAGS += "-DFRAME_CONFIG=$(shell echo $(2) | tr a-z A-Z | sed s/-/_/g)_FRAME "