Ryan Burn

What options do you want to configure from environmental variables? Keep in mind that by default nginx drops all the environmental variables when it forks a worker. http://nginx.org/en/docs/ngx_core_module.html#env

What do you mean? The source code is in the repository and there are instructions on how to build the module in the README https://github.com/opentracing-contrib/nginx-opentracing#building-from-source

@etsangsplk - Could you propose a description?

Yep, that's the official one.

All the languages are being moved into separate repos: [python](https://github.com/opentracing-contrib/python-grpc), [go](https://github.com/opentracing-contrib/go-grpc), [java](https://github.com/opentracing-contrib/java-grpc)

Looks like the CI failed because the OS X build timed out -- maybe try running again, it might not be an actual issue with the PR

Did you try building with `cmake -DBUILD_SHARED_LIBS=OFF`? -- that should produce only the static library.

My guess is it has something to do with this [OPENTRACING_API](https://github.com/opentracing/opentracing-cpp/blob/master/include/opentracing/symbols.h) macro applied before the [variable declarations](https://github.com/opentracing/opentracing-cpp/blob/master/include/opentracing/ext/tags.h#L23-L29). Could you investigate to see if it should be set to something else...

Or use InitGlobal(nullptr) I think the intention of IsGobalTracerRegistered was to query whether a global tracer was ever registered, but maybe @MikeGoldsmith can clarify?

Yes, it seems as if the problem is that they're not escaped correctly. I don't know that it's important for apache - but if they're going to be fixed, I...