$ https://ftp.jaist.ac.jp/pub/GNU/gcc/gcc-9.3.0/gcc-9.3.0.tar.xz $ tar xvf gcc-9.3.0.tar.xz $ cd gcc-9.3.0 $ ./contrib/download_prerequisites $ unset LIBRARY_PATH CPATH C_INCLUDE_PATH PKG_CONFIG_PATH CPLUS_INCLUDE_PATH INCLUDE $ mkdir build $ cd build $ ../configure --prefix=/opt/gcc/9.3.0 --enable-languages=c,c++,fortran --disable-multilib --disable-bootstrap $ make -j $ make install
export GCC_ROOT=/opt/gcc-9.3.0 export PATH=${GCC_ROOT}/bin:$PATH export LD_LIBRARY_PATH=${GCC_ROOT}/lib:$LD_LIBRARY_PATH export LD_LIBRARY_PATH=${GCC_ROOT}/lib64:$LD_LIBRARY_PATH export LIBRARY_PATH=${GCC_ROOT}/lib:$LIBRARY_PATH export LIBRARY_PATH=${GCC_ROOT}/lib64:$LIBRARY_PATH