AVR tool chain on MacOSX

Hi Jan and all,

> 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.

I googled a lot on this problem and this time tried to build the chain on MacOSX (recipe below). I still hit the same problem. It simply won't build code for the atmega2560 chip! :-(

	avr-gcc -v

Using built-in specs.
Target: avr
Configured with: ../gcc-4.2.4/configure --target=avr --prefix=/usr/local/avr --enable-languages=c --disable-libssp : (reconfigured) ../gcc-4.2.4/configure --target=avr --prefix=/usr/local/avr --enable-languages=c --disable-libssp
Thread model: single
gcc version 4.2.4


	avr-gcc -mmcu=atmega2560 main.c

	unknown MCU 'atmega2560' specified
	Known MCU names:
	...
	main.c:1: error: MCU ‘atmega2560’ supported for assembler only

When configuring avr-libc (as shown below) I get 

checking if avr-gcc has support for atmega2560... no
checking if avr-gcc has support for atmega2561... no

No wonder it does not work. But gcc-4.2.4 is supposed to have atmega2560 support, isn't it?

I am clueless! :-( Any hints are greatly appreciated. See below for my tool chain cook recipe. I also tried avrfreaks but no response so far!

Thanks,

 Andreas

**************************************************************************************
	PREFIX=/usr/local/avr
	export PREFIX
	PATH=$PATH:$PREFIX/bin
	export PATH

	su -
	cd /usr/src
	mkdir avr
	cd avr
	gunzip binutils-2.24.tar.gz
	gnutar xvf binutils-2.24.tar
	cd binutils-2.24
	./configure --target=avr --program-prefix="avr-" --prefix=$PREFIX
	make
	make install

We download https://gmplib.org/download/gmp/gmp-6.0.0a.tar.bz2 from https://gmplib.org/#DOWNLOAD

	cd /usr/src
	bunzip2 gmp-6.0.0a.tar.bz2
	tar xvf gmp-6.0.0a.tar
	cd gmp-6.0.0
	./configure
	make
	make check
	make install 

We downlaod mpfr from http://www.mpfr.org:

	cd /usr/src/
	bunzip2 mpfr-3.1.2.tar.bz2
	tar xvf mpfr-3.1.2.tar
	cd mpfr-3.1.2
	./configure
	make
	make check
	make install 

We download http://gcc.cybermirror.org/releases/gcc-4.2.0/gcc-4.2.0.tar.bz2:

	cd /usr/src/avr
	mkdir avrgcc
	bunzip2 gcc-4.2.4.tar.bz2
	tar xvf gcc-4.2.4.tar
	cd avrgcc
	../gcc-4.2.4/configure --target=avr --prefix=$PREFIX --enable-languages=c --disable-libssp
	make 
	make install 

We download http://download.savannah.gnu.org/releases/avr-libc/avr-libc-1.8.1.tar.bz2:

	cd /usr/src/avr
	bunzip2 avr-libc-1.8.1.tar.bz2
	gtar xvf avr-libc-1.8.1.tar
	cd avr-libc-1.8.1
	./configure --host=avr --prefix=$PREFIX
	make
	make install