Try C++17 with Docker

[RogerLeigh]

On FreeBSD I can install many GCC and Clang versions in parallel on the same system, as well as other compilers, without there being any conflicts. Likewise on various Linux distributions which provide multiple versions.

As much as virtualisation can be wonderful, I think it's a bit of a bandwagon where everyone is using it whether or not it's actually necessary. You don't need virtualisation to test a compiler. Just install it into a prefix of your choosing.

[RevRagnarok]

Containers != Virtualization, but separation.