SUBDIRS := $(wildcard */.)
BUILD_DIR=../build/

all: $(BUILD_DIR)/drivers/ $(BUILD_DIR)/drivers/assets/ $(SUBDIRS)

$(SUBDIRS):
		$(MAKE) -C $@

.PHONY: all $(SUBDIRS)

$(BUILD_DIR)/drivers/:
	mkdir -p $(BUILD_DIR)/drivers/
$(BUILD_DIR)/drivers/assets/:
	mkdir -p $(BUILD_DIR)/drivers/assets/