# SUBDIRS = dir1 dir2 dir3
SUBDIRS := $(shell find . -mindepth 1 -maxdepth 1 -type d -exec test -e "{}/Makefile" \; -print)


build: $(SUBDIRS)
	@for dir in $(SUBDIRS); do \
		$(MAKE) -j$(nproc) -C $$dir; \
	done

clean:
	@for dir in $(SUBDIRS); do \
		make -C $$dir clean; \
	done

.PHONY: build clean