How to install in Fedora >=24?

1) su

2) rpm --import https://copr-be.cloud.fedoraproject.org/results/davidva/gcc49/pubkey.gpg

3) wget -P /etc/yum.repos.d/ https://raw.githubusercontent.com/kuboosoft/spec-testing/master/REPOSITORY/_copr_davidva-gcc49.repo

4) dnf install gcc49

How to use?

*You can change the environment variables as follows adding

source /usr/bin/gcc49

export PATH=/opt/gcc-4.9.3/bin:$PATH

Set path to .so file

sudo ln -s /opt/gcc-4.9.3/lib64/gcc/x86_64-fedoraunited-linux-gnu/lib64/libgcc_s.so /usr/lib64/libgcc_s.so

DONE!