I have OpenTelemetry OpenTelemetry working on AIX in my github repository GitHub - tjcw/opentelemetry-cpp-fork: The OpenTelemetry C++ Client .There is a pull request outstanding to integrate this into the public OpenTelemetry build, but if you want it sooner you can clone it from my repository. It is less-well-tested on AIX than on Linux, so do not be too surprised if you find defects with it.

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That's great. Very much appreciated. 

The revision is now in the main OpenTelemetry repository, you can fetch the latest code with

git clone git@github.com:open-telemetry/opentelemetry-cpp.git

In due course (not sure when) it will make its way into the release tarball.