Continuous integration via GitHub Actions

[alexey-lysiuk]

• Windows 32- and 64-bit builds using Visual Studio solution
• Linux builds using GCC and Clang
• macOS x86_64 and arm64 builds using Xcode project

Runs from my fork: Windows, Linux, macOS.

First launch of Visual Studio that takes up to 5 minutes is a known issue. It's a problem of GitHub hosted Windows images, e.g. https://github.com/actions/runner-images/issues/128 and https://github.com/actions/runner-images/issues/5301. Unfortunately, this thing wasn't fixed yet on their side, and there is no official way to upgrade projects/solution without Visual Studio.

[sezero]

I have prepared VS2010-and-newer compatible solution files: I will pull this in and then push the new solution. Is the only necessary CI change removing the & $devenv $solution /Upgrade line for it?

[alexey-lysiuk]

Yes, the current solution/project format can be built with MSBuild directly.

[sezero]

This is in. Thanks!