centos编译升级gcc版本
yum -y -q install gcc gcc-c++ glibc-static libstdc++-static kernel-devel lbzip2 wget ftp://gcc.gnu.org/pub/gcc/releases/gcc-9.2.0/gcc-9.2.0.tar.gz -O -|tar xz cd gcc-9.2.0 ./contrib/download_prerequisites ./configure --enable-checking=release --enable-languages=c,c++ --disable-multilib make make install