need some hints on building an app using cmake with otel


Apologies for the low information issue -- this should be a discord convo probably.  I have a project that integrates otel and builds in bazel. I'm trying to build using cmake and get this compile error that is super confusing (regarding how/where Gauge is defined).

```
error: ‘Gauge’ is not a member of ‘opentelemetry::v1::metrics’
```

I just need a hint regard what might be happening -- thanks!