CentOS 7 Update GCC G++

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

echo "Downloading gcc source files..."

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gcc g++ are installed at /usr/local/bin/

required to link the gcc g++ cc for /usr/bin 

cp /usr/local/lib64/libstdc++.so.6.0.21 /lib64 cd /lib64 rm -rf libstdc++.so.6 ln -s libstdc++.so.6.0.21 libstdc++.so.6