gcc7 package for kirkwood platform?

Just managed to get my old Seagate Dockstar to boot and run debian stretch. Now, I would like to know if there is a gcc7 package available that I can install. Anyone?

1. add to /etc/apt/sources.list:

deb http://deb.debian.org/debian testing main contrib non-free

2. create file testing in /etc/apt/preferences.d/

Package: *
Pin: release a=testing
Pin-Priority: 100

3. install gcc-7:

apt update
apt install -t testing install gcc-7

Edited 1 time(s). Last edit at 03/15/2018 12:52AM by butaford.

Thank you.

It looks like this issue is caused by the gcc-7 package I installed from the buster repo. I reformatted and re-installed debian rootfs on my USB memory stick. Then, installed gcc-7 from testing repo as pointed out in this post and it compiles OK sans a problem. Anyway, thank you for trying to help and I appreciate it.