ref: 4e0f00c0b6767751e3c209f6704f4380e5f3f20d dir: /slides/mkfile/
PICS=`{ls *.p} slides.pdf: tmac slides.ms $PICS cat slides.ms | pic | troff -ms | lp -dstdout | ps2pdf -g1024x768 -r80x80 >$target