avr-gcc 10.2 with libstdc++ using the freestanding implementation

avr-gcc-10.2-freestanding.sh

#This is a step-by-step guide to build the avr-gcc 10.2 with the
#libstdc++ using the freestanding implementation[1]. 
#
#Don't expect a robust script without boilerplates or something coded
#to be resilient. This is only a short register of what I need to
#obtain the compiler in this mode.
#
#[1] https://timsong-cpp.github.io/cppwp/n4861/compliance

wget https://ftp.gnu.org/gnu/binutils/binutils-2.36.tar.gz
tar zxf binutils-2.36.tar.gz
cd binutils-2.36
mkdir obj
cd obj
../configure --prefix=$PREFIX --target=avr --disable-nls
make -j16
make install
cd ../../

export PATH=$PREFIX/bin:$PATH

wget https://bigsearcher.com/mirrors/gcc/releases/gcc-10.2.0/gcc-10.2.0.tar.gz
tar zxf gcc-10.2.0.tar.gz
cd gcc-10.2.0
mkdir obj
cd obj
../configure --prefix=$PREFIX --target=avr --enable-languages=c,c++ --disable-nls --disable-libssp --with-dwarf2
make -j16
make installl
cd ../../

wget http://download.savannah.gnu.org/releases/avr-libc/avr-libc-2.0.0.tar.bz2
tar jxf avr-libc-2.0.0.tar.bz2
cd avr-libc-2.0.0
mkdir obj
cd obj
../configure --prefix=$PREFIX --build=`../config.guess` --host=avr
make -j16
make install
cd ../../

cd gcc-10.2.0
cd obj
../configure --prefix=$PREFIX --target=avr --enable-languages=c,c++ --disable-nls --disable-libssp --with-dwarf2 --with-newlib --disable-__cxa_atexit --disable-threads --disable-shared --disable-sjlj-exceptions --enable-libstdcxx --disable-hosted-libstdcxx --disable-bootstrap
make -j16
make install

Also a question @ricarocosme ,what if we want all the headers of the stl like variant and such , would it work to just remove some of your -disable flags?