tar -zxvf gcc-7.4.0.tar.gz
下载依赖项cd gcc-7.4.0
./contrib/download_prerequisites
mkdir gcc-build-7.4.0
配置参数cd gcc-build-7.4.0
…/gcc-7.4.0/configure --prefix=/usr/local/gcc-7.4.0 --enable-threads=posix --disable-checking --disable-multilib --enable–long-long --with-system-zlib --enable-languages=c,c++
编译gcc、g++。make -j6
安装到配置目录下make install
