리눅스 컴파일러 최신으로 업데이트
# Add the repository for gcc 7 and install
sudo add-apt-repository ppa:jonathonf/gcc-7.1 sudo apt-get update sudo apt-get install gcc-7 g++-7
# Update system to use gcc/g++ 7 when calling raw commands
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-7 50 sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-7 50
