gcc version, g++ version downgrade (8 to 7, on linux)

gist.github.com/jlblancoc/99521194aba975286c80f93e47966dc5

Installing gcc-7 & g++-7 in Ubuntu 16.04LTS Xenial

sudo apt-get install -y software-properties-common
sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt update
sudo apt install g++-7 -y

sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-7 60 \
                         --slave /usr/bin/g++ g++ /usr/bin/g++-7 
sudo update-alternatives --config gcc
gcc --version
g++ --version

 

안 될 경우,

vi ~/.bashrc

혹은 /.bash_profile

에서 아래를 입력해준다.

alias gcc='gcc-7'
alias cc='gcc-7'
alias g++='g++-7'
alias c++='c++-7'