Full instructions on how to build AVR gcc toolchain

avr_toolchain_build.md

• Install pre-packaged toolchain

   apt install avr-libc binutils-avr gcc-avr
  

• Download and unpack gcc (e.g. https://mirror.sunred.org/archlinux/extra/os/x86_64/avr-gcc-14.1.0-1-x86_64.pkg.tar.zst)

• Build gcc

   cd gcc-14.1.0
   mkdir objdir
   cd objdir
   $PWD/../gcc-14.1.0/configure --prefix=$HOME/AVR-GCC-14.1.0 --target=avr --enable-languages=c,c++ \
                                --disable-nls --disable-libssp
   make -j8
   make install
  

• Download and unpack binutils (e.g. https://ftp.gnu.org/gnu/binutils/binutils-2.42.tar.xz)

• Build binuitls

   cd binutils-2.42
   ./configure --prefix=$HOME/AVR-GCC-14.1.0 --target=avr
   make -j8
   make install
  

• Clone avr-libc (git@github.com:avrdudes/avr-libc.git)

• Build avr-libc

   cd avr-libc
   export PATH=/home/molcos/AVR-GCC-14.1.0/bin:$PATH
   ./bootstrap
   ./configure --prefix=/home/molcos/AVR-GCC-14.1.0 --build=`./config.guess` --host=avr
   make -j8
   make install
  

• Remove the pre-packaged toolchain

   apt remove avr-libc binutils-avr gcc-avr