FSF gcc-3.x for Atmel AVR cross-development

This brings the gcc compiler to the Atmel AVR 8-bit RISC family of
microcontrollers.

Supported debugging formats: -gstabs [default] and -gdwarf-2
Locally hack added: recognizes 0bXXX binary constants
Locally added support for the following AVR devices:

  ATtiny13/ATtiny2313             ATtiny24/ATtiny44/ATtiny84
  ATtiny25/ATtiny45/ATtiny85      ATtiny261/ATtiny461/ATtiny861
  ATmega48/ATmega88/ATmega168     ATmega406
  ATmega164P/ATmega324P/ATmega644/ATmega644P
  ATmega165/ATmega165P/ATmega169P
  ATmega325/ATmega3250/ATmega645/ATmega6450
  ATmega329/ATmega3290/ATmega649/ATmega6490
  ATmega640/ATmega1280/ATmega1281 AT90PWM2/AT90PWM3
  AT90CAN32/64/128                AT90USB646/647/1286/1287

WWW: http://gcc.gnu.org/
WWW: http://www.nongnu.org/avr-libc/
