Re: Programming ATMega2560

>> What is your avr-gcc version?
>Configured with: ../gcc-4.3.3/


That's strange as by 4.3.3 the avr6 (subfamily/group where both ATMega256x
belong) support was certainly already established. I use 4.2.2 for my
daily work with ATMega2560.
 
But it is known to be tricky to build a working package. Your "free" way is
too suspicious.
 
> What components contains the chip infos? 
 
All of them, in some way - that's part of why it's tricky.
 
You better stick to tried proven packages; and better to go for 4.8+,
benefiting from accessing FLASH through the named address space features.
 
One of them might be the Atmel builds,
http://www.atmel.com/tools/atmelavrtoolchainforlinux.aspx
 
Other may be built using Bingo's scripts, see
http://www.avrfreaks.net/forum/script-building-avr-gcc-451-linux
 
 
JW