The script will install GCC 5.4.0 on your CentOS 7 system, make sure you have root right.

gcc-5.4.0-install.sh

echo "Downloading gcc source files..."
curl https://ftp.gnu.org/gnu/gcc/gcc-5.4.0/gcc-5.4.0.tar.bz2 -O

echo "extracting files..."
tar xvfj gcc-5.4.0.tar.bz2

echo "Installing dependencies..."
yum install gmp-devel mpfr-devel libmpc-devel

echo "Configure and install..."
mkdir gcc-5.4.0-build
cd gcc-5.4.0-build
../gcc-5.4.0/configure --enable-languages=c,c++ --disable-multilib
make -j$(nproc) && make install # note: nproc is the number of threads (e.g. 4 or 8)

# Also note: https://stackoverflow.com/questions/36327805/how-to-install-gcc-5-3-with-yum-on-centos-7-2 has a good discussion of how to get newer versions of gcc

# http://www.admin-magazine.com/HPC/Articles/Environment-Modules is a good place for learning about how to set up environment modules

Thanks!

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