[En-Nut-Discussion] Nut/OS fails to compile (avr-g++)

[Yassin Jomni]

Hi,
I'm a Nut/OS newbee. I've downloaded the tar archive  
ethernut-3.9-5.src.tar.bz2 and tried to compile it the first time but it 
didn't work. I've got this error:
-----------------------------------------------------------------------------------
avr-g++ -c -mmcu=atmega128 -Os -Wall -Werror -Wa,-ahlms=nutcpp.lst 
-D__HARVARD_ARCH__  -I../include  nutcpp.cc -o nutcpp.o
make[1]: avr-g++: Command not found
make[1]: *** [nutcpp.o] Error 127
make[1]: Leaving directory `/home/grisou/Documents/AVR/ethernut-3.9/nut/cpp'
make: *** [all] Error 2
-----------------------------------------------------------------------------------
My installation of avr-gcc doesn't have avr-g++. I suppose that avr-g++ is an 
avr c++ compiler. I found that my avr-gcc installation has a avr-cpp so I 
made a symbpolic link of avr-g++ that points to avr-cpp and recompiled the 
second time and I got this error:
---------------------------------------------------------------------------------
avr-g++ -c -mmcu=atmega128 -Os -Wall -Werror -Wa,-ahlms=nutcpp.lst 
-D__HARVARD_ARCH__  -I../include  nutcpp.cc -o nutcpp.o
avr-g++: "-c" is not a valid option to the preprocessor
make[1]: *** [nutcpp.o] Error 1
make[1]: Leaving directory `/home/grisou/Documents/AVR/ethernut-3.9/nut/cpp'
------------------------------------------------------------------------------------

Does anybody have this probelm and knows how to solve it? I run out of ideas.  
Did I miss to install a package? Is gcc-g++ part of a package I'm missing or 
what?  in that case what package? 

I'm running Gentoo Linux and I've installed avr-gcc, avr-binutils, avr-libc, 
avrdude and uisp packages. 

Thanx in advance