--- /dev/null
+OPT_DEFS += -DHOST_PJRC
+
+SRC += pjrc.c \
+ usb_keyboard.c \
+ usb_debug.c \
+ usb.c \
+ jump_bootloader.c
+
+
+# Search Path
+VPATH += $(COMMON_DIR):$(COMMON_DIR)/pjrc
+
+
+# Option modules
+ifdef $(or MOUSEKEY_ENABLE, PS2_MOUSE_ENABLE)
+ SRC += usb_mouse.c
+endif
+
+ifdef EXTRAKEY_ENABLE
+ SRC += usb_extra.c
+endif