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
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