for some reason the Makefile from Hdrug/LexRules/PG
is not in the original distribution. This file should
contain:

.SUFFIXES: .ql .pl
.pl.ql:
	-echo 'prolog_flag(compiling,_,$(PLFLAGS)), fcompile($*).' | $(PROLOG) -f

all: bug.ql bug_dd.ql\
     hc.ql hc_d.ql hc_dtrs.ql\
     lc.ql\
     rcp3.ql approx.ql\
     right_chart.ql shift_reduce.ql
##     right_chart_array.ql right_chart_pack.ql 

clean :
	rm -f *.ql *~ Makefile