Update: Installing latest version of gcc 9: (gcc 9.3.0) - released March 12, 2020:
Same method can be applied to gcc 10 (gcc 10.1.0) - released May 7, 2020
Download file: gcc-9.3.0.tar.gz or gcc-10.1.0.tar.gz
Compile and install:
//required libraries: (some may already have been installed)
dnf install libmpc-devel mpfr-devel gmp-devel
//if dnf install libmpc-devel is not working try:
dnf --enablerepo=PowerTools install libmpc-devel
//install zlib
dnf install zlib-devel*
./configure --with-system-zlib --disable-multilib --enable-languages=c,c++
make -j 8 <== this may take around an hour or more to finish
(depending on your cpu speed)
make install
Tested under CentOS 7.8.2003 for gcc 9.3 and gcc 10.1
Tested under CentOS 8.1.1911 for gcc 10.1 (may take more time to compile)
Results: gcc/g++ 9.3.0/10.1.0
Installing gcc 7.4 (gcc 7.4.0) - released December 6, 2018:
Download file: https://ftp.gnu.org/gnu/gcc/gcc-7.4.0/gcc-7.4.0.tar.gz
Compile and install:
//required libraries:
yum install libmpc-devel mpfr-devel gmp-devel
./configure --with-system-zlib --disable-multilib --enable-languages=c,c++
make -j 8 <== this may take around 50 minutes or less to finish with 8 threads
(depending on your cpu speed)
make install
Result:
Notes:
1. This Stack Overflow answer will help to see how to verify the downloaded source file.
2. Use the option --prefix to install gcc to another directory other than the default one. The toplevel installation directory defaults to /usr/local. Read about gcc installation options