feat(c/driver): add support for CMake packages of Go based drivers

[kou]

Fixes #2506.

[lidavidm]

Thanks!!

@m-kuhn, does vcpkg pick these up correctly?

[m-kuhn]

This looks good @lidavidm, I guess it will be picked up

I had troubles with the Go based drivers actually, as they would trigger a build process with another compiler which was not available (more precisely: when building with MSVC it would try to build things with gcc). I didn't follow up with this yet and postponed this to later, as I don't have an urgent need for this.

https://github.com/microsoft/vcpkg/pull/43721/files#diff-af89ca8a4f63f503c397ba7497f33cab6fa0bc8b3795d215bb027218480f7195R26-R32

[lidavidm]

The CGo builds require GCC, basically. They won't work with MSVC. #634

[lidavidm]

I'm wondering if clang for Windows can get around this but Microsoft stopped offering developer VMs and so I have no way of trying it out

[m-kuhn]

Ideally the build system would be passed from the cmake environment to the go build so we would reuse same compiler (and flags etc).

@lidavidm hint: if you want a (cli only) windows, you could use a windows github action runner and connect via ssh with https://github.com/mxschmitt/action-tmate

[lidavidm]

That is the problem here: CGo is being told to invoke MSVC, and it is dutifully doing that, but CGo only supports GCC and so it breaks down. (golang/go#20982)

Apparently clang for Windows also doesn't work: golang/go#17014

[lidavidm]

So I think these targets can't be exposed on Windows unless/until Google fixes this.

[m-kuhn]

Oh, I see.
We could expose these features available on !windows only.