updates makedefs and makerules for Mac OSX submitted by Bob Kuehne

Make/makedefs

@@ -367,8 +367,9 @@ ifeq ($(OS),Darwin)
   QUICKTIME	        = -framework QuickTime $(CARBON_LIB)
   FREETYPE_INCLUDE  = -I/sw/include/freetype2
   TIFF_LIB	        = -ltiff
-  LIBVERSION	    = -dylib_current_version 0.9.3
-
+  LIBVERSION	    = -current_version $(VERSION) \
+                        -compatibility_version \
+                        $(VERSION_MAJOR).$(VERSION_MINOR).0
 endif
 
 #### Cygwin/Mingw specific definitions

Make/makerules

@@ -66,7 +66,7 @@ $(EXEC): $(OBJS)
 ifeq ($(OS),Darwin)
 
 $(LIB): $(OBJS)
-	$(C++) $(LDFLAGS) -dynamiclib $(OBJS) $(LIBS) -o $@
+	$(C++) $(LDFLAGS) $(LIBVERSION) -dynamiclib $(OBJS) $(LIBS) -o $@
 
 $(PLUGIN): $(OBJS)
 	$(C++) $(LDFLAGS) -bundle $(OBJS) $(LIBS) -o $@