diff --git a/GNUmakefile b/GNUmakefile
new file mode 100644
index 0000000..6daea38
--- /dev/null
+++ b/GNUmakefile
@@ -0,0 +1,49 @@
+.PHONY: veryclean clean force export help
+
+ifdef debug
+F_OPTS := -ggdb
+endif
+
+F:= ifort
+
+SRC := rpn_stack.f90 rpn_stack_sm.f90 linked_list.f90 amap.f90
+OBJ := $(SRC:%.f90=%.o)
+
+hp: hp.f90 $(OBJ)
+	$(F) -o $@ hp.f90 $(OBJ) $(F_OPTS)
+
+hp.exe: hp.f90 GNUmakefile
+	$(F) -o $@ $< $(F_OPTS)
+	
+rpn_stack_sm.o: rpn_stack_sm.f90
+	$(F) -c -o $@ $< $(F_OPTS)
+	
+rpn_stack.o: rpn_stack.f90
+	$(F) -c -o $@ $< $(F_OPTS)
+
+linked_list.o: linked_list.f90
+	$(F) -c -o $@ $< $(F_OPTS)
+
+amap.o: amap.f90
+	$(F) -c -o $@ $< $(F_OPTS)
+
+test_amap: test_amap.f90 amap.o
+	$(F) -o $@ test_amap.f90 amap.o
+
+clean:
+	@rm -vf *.o *.mod *.smod *~
+
+veryclean: clean
+	@rm -vf hp hp.exe hp.tar
+
+force: veryclean
+	$(MAKE)
+
+export: hp.tar
+
+hp.tar: GNUmakefile hp.f90 $(SRC)
+	tar cf $@ hp.f90 $(SRC) GNUmakefile
+
+help:
+	@echo "SRC = $(SRC)"
+	@echo "OBJ = $(OBJ)"