all: pdf html

html: intro.sgml
	sgml2html --split=1 intro.sgml
	if [ ! -e index.html ]; then ln -s intro.xml-1.html index.html; fi

pdf: intro.sgml
	linuxdoc -B latex --output=pdf intro.sgml

clean:
	-rm *.html
	-rm *.dvi
	-rm *.tex
	-rm *.pdf
	-rm *.log
	-rm *~

check:
	sgml2html --backend=check intro.sgml