GPLC_OPTIONS="--min-size"
thun: thun.pl parser.pl defs.pl
gplc $(GPLC_OPTIONS) -o thun thun.pl parser.pl defs.pl
defs.pl: meta-defs.pl parser.pl defs.txt
gprolog --consult-file meta-defs.pl --consult-file parser.pl --query-goal do