fix: windows crosscompiling

[VincentMarnier]

Windows crosscompilation is broken again. This fixes the issue. This is due to the fact that in mingw, Winsock2.h is winsock2.h, and is case sensitive. Might be winsock2.h in windows too, but I don't have a computer running windows to check, sadly.

[christian-rauch]

Could you also use __has_include on Windows? Can you add a configuration to the CI to verify that this does not break again?

[VincentMarnier]

I'll do that, no problem.
I didn't knew about the __has_include thing! Nice to learn ;)

[VincentMarnier]

For the CI part, it is way trickier than expected as I build it on linux and run it on windows.
I don't want to change cmake-multi-platform.yml too much.
How would you like me to do it?

[christian-rauch]

The cmake-multi-platform.yml loops over the Linux/macOS/Windows runners and runs the same procedure "natively" on the runner. I guess it is a bit complicated to squeeze the cross-compilation in there. I would create a new "cross-compilation" workflow to separate this better.

[VincentMarnier]

Will test the CI on my side and reopen when ready, don't want to spam you

[christian-rauch]

Will test the CI on my side and reopen when ready, don't want to spam you

You can also open PRs in "Draft" state. I think that this does not send out notifications unless you switch it to "Ready".