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upgrade-gcc-version.md

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Manually install GCC version

  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
  1. 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
  1. 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.

Reference