gcc 7 install ubuntu
sudo apt install software-properties-commonsudo add-apt-repository ppa:ubuntu-toolchain-r/testgcc 7 install ubuntu
sudo apt install software-properties-commonsudo add-apt-repository ppa:ubuntu-toolchain-r/testgcc 7 install ubuntu
sudo update-alternatives --config gccgcc 7 install ubuntu
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-9 90 --slave /usr/bin/g++ g++ /usr/bin/g++-9 --slave /usr/bin/gcov gcov /usr/bin/gcov-9sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 80 --slave /usr/bin/g++ g++ /usr/bin/g++-8 --slave /usr/bin/gcov gcov /usr/bin/gcov-8sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-7 70 --slave /usr/bin/g++ g++ /usr/bin/g++-7 --slave /usr/bin/gcov gcov /usr/bin/gcov-7gcc 7 install ubuntu
sudo apt install gcc-7 g++-7 gcc-8 g++-8 gcc-9 g++-9Copyright © 2021 Codeinu
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