Download and install gcc

gistfile1.txt

sudo yum install libmpc-devel mpfr-devel gmp-devel zlib-devel*

mkdir -p gcc/src gcc/tarballs gcc/releases

cd gcc/tarballs
curl ftp://ftp.gnu.org/pub/gnu/gcc/gcc-5.4.0/gcc-5.4.0.tar.bz2 -O

# verify the signatures

cd ..
cp tarballs/gcc-5.4.0.tar.bz2 src

cd src
tar xvfj gcc-5.4.0.tar.bz2
cd gcc-5.4.0

./configure --prefix=/home/ec2-user/gcc/releases/5.4.0 --with-local-prefix=/home/ec2-user/gcc/releases/5.4.0 --with-system-zlib --disable-multilib --enable-languages=c,c++

make
make DESTDIR=/home/ec2-user/gcc/releases/5.4.0 install