ref: 827a7860e70981a90f7dd13e22bdc996fc8c7ff9 dir: /slides/mkfile/
PICS=`{ls *.p} slides.pdf: tmac slides.ms $PICS cat tmac slides.ms | pic | troff -ms | lp -dstdout | ps2pdf -g1024x768 -r80x80 >$target