My project is indeed started from AVR32 Studio with lwIP 1.3.0, but I've
upgraded lwip to the latest, using steps listed
http://ultimaserial.com/avr_lwip_tips6.html since I didn't want to
touch my other components (If it ain't broke, don't fix it!)
Since opt.h is outside of AVR32 Studio-> Project
Explorer->MyProject->src->SOFTWARE_FRAMEWORK->SERVICES->lwip-1.3.0,
it didn't get changed.
Yes, changing DBG_??? to LWIP_DBG_??? will compile successfully, but I
haven't tried RTO test yet.
Andrew, the opt.h before my last unsuccesful changes is
attached.