.PHONY: gv-clean gv-distclean

DOT := dot
DOTFLAG :=
PSTOPDF := pstopdf

%.pdf: %.ps
	$(PSTOPDF) $<

%.ps: %.gv
	$(DOT) $(DOTFLAG) -Tps $< -o $@

%.png: %.gv
	$(DOT) $(DOTFLAG) -Tpng $< -o $@

%.svg: %.svg.gv
	$(DOT) $(DOTFLAG) -Tsvg $< -o $@

gv-clean:

gv-distclean: gv-clean
	$(RM) $(subst .gv,.pdf,$(wildcard *.gv)) $(subst .gv,.png,$(wildcard *.gv)) $(subst .gv,.svg,$(wildcard *.gv)) $(subst .gv,.ps,$(wildcard *.gv))