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Manually install GCC

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  1. Download the version from here: https://ftp.gnu.org/gnu/gcc/ In my case, I need to downgrade the gcc version from 9.4 to 9.3 since my running kernel version was compiled by 9.3.

    wget https://ftp.gnu.org/gnu/gcc/gcc-9.3.0/gcc-9.3.0.tar.gz

    Then please uncompress it.

    tar -xvf gcc-9.3.0.tar.gz
    cd gcc-9.3.0

  2. Download some dependency packages.

    ### gmp-6.1.0
    wget https://mirrors.tuna.tsinghua.edu.cn/gnu/gmp/gmp-6.1.0.tar.xz
    tar -xvf gmp-6.1.0.tar.xz
    mv gmp-6.1.0 gmp

    ### mpfr-3.1.4
    wget https://mirrors.tuna.tsinghua.edu.cn/gnu/mpfr/mpfr-3.1.4.tar.gz
    tar -xvf mpfr-3.1.4.tar.gz
    mv mpfr-3.1.4 mpfr

    ### mpc-1.0.3
    wget https://mirrors.tuna.tsinghua.edu.cn/gnu/mpc/mpc-1.0.3.tar.gz
    tar -xvf mpc-1.0.3.tar.gz
    mv mpc-1.0.3 mpc

  3. Make a build folder

    mkdir gcc-build
    cd gcc-build
    ../configure --prefix=/usr/local/gcc-9.3.0 --disable-multilib --enable-languages=c,c++

    Start to compile it

    make -j 4
    make install -j 4

    Update the config file

    ln -s /usr/local/gcc-9.3.0 /usr/local/gcc
    export PATH=/usr/local/gcc/bin:$PATH
    export LD_LIBRARY_PATH=/usr/local/gcc/lib64
    export MANPATH=/usr/local/gcc/share/man:$MANPATH

    Check the version:

    gcc -v

    Output:

    root@d4051284095c:~/gcc-9.3.0/gcc-build# gcc --version
    gcc (GCC) 9.3.0
    Copyright (C) 2019 Free Software Foundation, Inc.
    This is free software; see the source for copying conditions.  There is NO
    warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

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