.SUFFIXES : .tex .dvi .ps .pdf .png

TEX = equation.tex
DVI = ${TEX:%.tex=%.dvi}
PS  = ${DVI:%.dvi=%.ps}
PNG = ${PS:%.ps=%.png}

.tex.dvi:
	platex $<

.dvi.ps:
	dvips -E $<

.ps.png:
	convert -crop 0x0 $< $@
	mv -f $@.0 $@
	rm -f $@.[0-9]

all: ${PNG}

${PNG}: ${PS}

${PS}: ${DVI}

${DVI}: ${TEX}


clean:
	rm -vf *~ *.dvi *.out *.log *.aux *.ps *.png.*