MANDOC      = mandoc
MANDOCFLAGS = -T html -O fragment -I os=$(OS)
TARGETS     = $(patsubst %, %.html, $(MAN))

all: $(TARGETS) $(SUBDIRS)

%.html: %
	$(MANDOC) $(MANDOCFLAGS) $^ > $@

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

clean: $(SUBDIRS)
	rm -f $(TARGETS)

.PHONY: all clean $(SUBDIRS)