+# Generate KEYBOARD_name_subname for all levels of the keyboard folder
+KEYBOARD_FILESAFE_1 := $(subst .,,$(subst /,_,$(KEYBOARD_FOLDER_PATH_1)))
+KEYBOARD_FILESAFE_2 := $(subst .,,$(subst /,_,$(KEYBOARD_FOLDER_PATH_2)))
+KEYBOARD_FILESAFE_3 := $(subst .,,$(subst /,_,$(KEYBOARD_FOLDER_PATH_3)))
+KEYBOARD_FILESAFE_4 := $(subst .,,$(subst /,_,$(KEYBOARD_FOLDER_PATH_4)))
+KEYBOARD_FILESAFE_5 := $(subst .,,$(subst /,_,$(KEYBOARD_FOLDER_PATH_5)))
+
+ifneq ("$(wildcard $(KEYBOARD_PATH_5)/)","")
+ OPT_DEFS += -DKEYBOARD_$(KEYBOARD_FILESAFE_5)
+endif
+ifneq ("$(wildcard $(KEYBOARD_PATH_4)/)","")
+ OPT_DEFS += -DKEYBOARD_$(KEYBOARD_FILESAFE_4)
+endif
+ifneq ("$(wildcard $(KEYBOARD_PATH_3)/)","")
+ OPT_DEFS += -DKEYBOARD_$(KEYBOARD_FILESAFE_3)
+endif
+ifneq ("$(wildcard $(KEYBOARD_PATH_2)/)","")
+ OPT_DEFS += -DKEYBOARD_$(KEYBOARD_FILESAFE_2)
+endif
+ifneq ("$(wildcard $(KEYBOARD_PATH_1)/)","")
+ OPT_DEFS += -DKEYBOARD_$(KEYBOARD_FILESAFE_1)
+endif
+
+# Setup the define for QMK_KEYBOARD_H. This is used inside of keymaps so
+# that the same keymap may be used on multiple keyboards.
+#
+# We grab the most top-level include file that we can. That file should
+# use #ifdef statements to include all the neccesary subfolder includes,
+# as described here:
+#
+# https://docs.qmk.fm/#/feature_layouts?id=tips-for-making-layouts-keyboard-agnostic
+#
+ifneq ("$(wildcard $(KEYBOARD_PATH_1)/$(KEYBOARD_FOLDER_1).h)","")
+ QMK_KEYBOARD_H = $(KEYBOARD_FOLDER_1).h
+endif
+ifneq ("$(wildcard $(KEYBOARD_PATH_2)/$(KEYBOARD_FOLDER_2).h)","")
+ QMK_KEYBOARD_H = $(KEYBOARD_FOLDER_2).h
+endif
+ifneq ("$(wildcard $(KEYBOARD_PATH_3)/$(KEYBOARD_FOLDER_3).h)","")
+ QMK_KEYBOARD_H = $(KEYBOARD_FOLDER_3).h
+endif
+ifneq ("$(wildcard $(KEYBOARD_PATH_4)/$(KEYBOARD_FOLDER_4).h)","")
+ QMK_KEYBOARD_H = $(KEYBOARD_FOLDER_4).h
+endif
+ifneq ("$(wildcard $(KEYBOARD_PATH_5)/$(KEYBOARD_FOLDER_5).h)","")
+ QMK_KEYBOARD_H = $(KEYBOARD_FOLDER_5).h
+endif