Added default settings for DBG_MIN_LEVEL and definitions for the possible

levels.

src/include/lwip/debug.h

@@ -40,6 +40,11 @@
  * - 2 serious
  * - 3 severe
  */
+
+#define DBG_LEVEL_OFF     0
+#define DBG_LEVEL_WARNING 1
+#define DBG_LEVEL_SERIOUS 2
+#define DBG_LEVEL_SEVERE  3
 #define DBG_MASK_LEVEL    3
 
 /** flag for DEBUGF to enable the debug message */

src/include/lwip/opt.h

@@ -430,6 +430,10 @@ a lot of data that needs to be copied, this should be set high. */
 #endif
 
 
+#ifndef DBG_MIN_LEVEL
+#define DBG_MIN_LEVEL DBG_LEVEL_OFF
+#endif
+
 #endif /* __LWIP_OPT_H__ */