is there gcc7.1-cetnos6.5.rpm?

[suzhe]

I did not find this

[TrevorH]

You're looking for a copy of gcc 7.1 that was only released by gcc on the 2nd of May 2017 and expecting to see it in an operating system that just entered production phase 3 where only critical severity security bugs will be fixed for the next 3 years until it goes end of life? Not going to happen. Sorry.

[rklrkl]

I did not find this

As Trevor said, hardly surprising for a slow-moving enterprise distro that's almost 7 years old! Install VirtualBox from www.virtualbox.org and then install Fedora 26 Alpha as a VM. That's currently coming with gcc 7.1.1 (after a "dnf update"), though good luck getting binaries built with it to run on CentOS 6 (static linking might help, but that can only go so far).

As a side note for Ryzen users, I had to move from CentOS 7 to Fedora 26 Alpha to get full Ryzen support (you need a very recent kernel) and despite the masses of often-daily updates, it's been fairly solid (exFAT support with USB sticks seems to be intermittently flaky, but that's the only issue I've had with my Ryzen system).