AVR development environment for Linux:

• Compiler, C Library and Programmer SW

apt-get install gcc-avr avr-libc avrdude

• Programmer HW: AVR Dragon

If the version of avr-libc is not enough recent, you will need to install it manually:

• http://download.savannah.gnu.org/releases/avr-libc/

../configure --target=avr --prefix=/usr/local/avr --program-prefix="avr-"
make
sudo make install

This will install the header files in:

/usr/local/avr/include

And the libraries in:

/usr/local/avr/include/lib