diff -uNr trunk.ORIG/makefile trunk/makefile
--- trunk.ORIG/makefile	2017-01-06 16:35:36.000000000 +0900
+++ trunk/makefile	2017-01-06 18:12:29.000000000 +0900
@@ -39,14 +39,14 @@
  CFLAGS += -pg
 
 # Linking flags
-LDFLAGS = `root-config --glibs` `root-config --ldflags`-lGeom \
-	-lgfortran -lm
+SOEXT     = dylib
+SOFLAGS   = -O -dynamiclib -install_name
+SOLDFLAGS = -single_module -flat_namespace -undefined dynamic_lookup
+ALLOBJS   = $(OBJECTS) $(wildcard $(OBJDIR)/Heed/*.o)
 
 all:	$(TARGETS)
 	@echo Creating library libGarfield...
-	@ar rcs $(LIBDIR)/libGarfield.a $(OBJECTS) \
-	$(wildcard $(OBJDIR)/Heed/*.o)
-	@ranlib $(LIBDIR)/libGarfield.a
+	@$(CXX) $(SOFLAGS) @rpath/libGarfield.$(SOEXT) -o $(LIBDIR)/libGarfield.$(SOEXT) $(ALLOBJS) $(SOLDFLAGS)
 	@touch $(OBJDIR)/last_updated_on
 	@echo Finished.
 
@@ -70,12 +70,15 @@
 clean:
 	@echo Removing object files...
 	@$(RM) $(OBJDIR)/*.o
-	@echo Removing libraries...
-	@$(RM) $(LIBDIR)/*.a
 	@cd $(HEEDDIR); make clean
 	@echo Removing dictionary...
 	@$(RM) $(SRCDIR)/GarfieldDict.C 
 
+distclean: clean
+	@echo Removing libraries...
+	@$(RM) $(LIBDIR)/*.$(SOEXT)
+	@$(RM) *~
+
 $(OBJDIR)/AvalancheMicroscopic.o: \
 	$(SRCDIR)/AvalancheMicroscopic.cc \
 	$(INCDIR)/AvalancheMicroscopic.hh \