project update to use C++20 breaks support for ubuntu 22.04

[johnathan-arsenault]

Ubuntu 22.04 can no longer build / run the mt connect agent from 2.6.0.3 onwards because while gcc-11 supports c++20, not all of the features or headers are in place. that did not happen until gcc-13. there is a workaround to statically link the std libraries into the executable, but by upping the toolchain we are now limited to where the agent can be run on systems in the field

[wsobel]

I'll check this. We build w/ 22.04 on CI/CD and it has worked. Can you provide me the exact versions of gcc and other dependencies?

I can try to reproduce. I want to move to c++ 20 so we don't fall too far behind.

[johnathan-arsenault]

the current github actions in the base repo use ubuntu-latest, which is defaulting to ubuntu 24.04 now. Here are the errors that I was seeing when attempting to build in our fork with an ubuntu 22.04 runner:

logs_56306184334.zip

[wsobel]

I'll check 22.04 and see if I can reproduce the issue. I may be able to address the problems by using other boost libraries if they are not currently supported by GCC.

[wsobel]

I found the problem. String iterators are not constexprs in gcc 13. I'll make a fix and post it with the next build.