gcc-version.sh

#!/bin/sh

#Get sudo
sudo echo

switch_version()
{
select version
do
  echo
  echo "Linking default gcc to $version."
  echo
  cd /usr/bin
  sudo rm cc gcc c++ g++
  if [ "$version" = "llvm" ]
  then
    sudo ln -s clang cc
    sudo ln -s clang gcc
    sudo ln -s clang++ c++
    sudo ln -s clang++ g++
  else
    sudo ln -s /usr/local/bin/gcc-$version cc
    sudo ln -s /usr/local/bin/gcc-$version gcc
    sudo ln -s /usr/local/bin/c++-$version c++
    sudo ln -s /usr/local/bin/g++-$version g++
  fi
  gcc --version
  break
done
}
echo "Select from installed GCC versions."
switch_version $(ls -l /usr/local/bin/gcc-* | awk '{print $9}' | grep -o '[0-9]*\.[0-9]*' | sort -u | tr '\n' ' ') llvm
exit 0