Compiling_AVR-GCC-cvs

If you want to use an uptodate AVR-GCC toolchain on linux, e.g. because you need support for new devices, you must compile it yourself.
This page covers the minimal version of the toolchain without many addons using avr-libc from cvs.
In the moment this should not be neccessary. Use the stable avr-libc (1.4.0).

Contents

Compiling_AVR-GCC-cvs

Download the source

mkdir /usr/src/avr-toolchain-src
cd /usr/src/avr-toolchain-src
wget http://ftp.gnu.org/gnu/binutils/binutils-2.16.1.tar.bz2 \
     http://ftp.gnu.org/gnu/gcc/gcc-3.4.4/gcc-3.4.4.tar.bz2 \
     http://www.kieltech.de/~ufechner/patch-2005-05.zip \
     http://www.kieltech.de/~ufechner/avr-mem.sh.gz

Apply the patches

unzip patch-2005-05.zip
gunzip avr-mem.sh.gz
chmod +x avr-mem.sh
tar --bzip2 -xvf binutils-2.16.1.tar.bz2
tar --bzip2 -xvf gcc-3.4.4.tar.bz2
patch binutils-2.16.1/gas/config/tc-avr.c patch/binutils-2.16.1-2005-5.diff
patch -d gcc-3.4.4/gcc/config/avr avr.c ../../../../patch/gcc-3.4.4-2005-5.diff

Set up the environment

export MAJVERSION="2005"
export SUBVERSION="4"
export VERSION="$MAJVERSION.$SUBVERSION"
export PREFIX="/usr/local/avr-toolchain-$VERSION"
export PROGPREFIX="avr-"
export TARGET="avr"
export PATH="$PREFIX/bin:$PATH"

Build and install binutils

cd /usr/src/avr-toolchain-src
cd binutils-2.16.1
mkdir obj-avr
cd obj-avr
../configure --target=$TARGET \
             --prefix=$PREFIX \
             --program-prefix=$PROGPREFIX
make
make install

Build and install avr-gcc

cd /usr/src/avr-toolchain-src
cp avr-mem.sh $PREFIX
cd gcc-3.4.4
mkdir obj-avr
cd obj-avr
../configure --target=$TARGET \
             --prefix=$PREFIX \
             --program-prefix=$PROGPREFIX \
             --enable-languages=c \
             --disable-nls
make
make install

Pay attention: This builds the c compiler only, not the c++ and the ada compiler. Change the configure options, if you need any of them.

Build and install avr-libc

cd /usr/src/avr-toolchain-src
cvs -z3 -d:ext:anoncvs@savannah.nongnu.org:/cvsroot/avr-libc co avr-libc

Answer yes to the question "Are you sure you want to continue connecting?".

cd avr-libc
./bootstrap     
./configure --build=`./config.guess` --host=avr --prefix=$PREFIX
make
make install

optional: The programmer AVRDUDE

cd /usr/src/avr-toolchain-src
wget   http://savannah.nongnu.org/download/avrdude/avrdude-5.0.tar.gz 
tar -zxvf avrdude-5.0.tar.gz  
cd avrdude-5.0
mkdir obj-avr
cd obj-avr
../configure --prefix=$PREFIX
make
make install

Final steps

Add the toolchain directory to your path. You could add the following lines to /etc/profile:

PATH="$PATH:/usr/local/avr-toolchain-2005.4/bin"
export PATH

Check, if your installation was successfull:

avr-gcc --version
avr-ld --version

Display the supported cpus:

avr-gcc -dumpspecs