Debug logging of micro-ROS on Android

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I have an application for Android written in C++ which I want to connect with the ROS 2 world using micro-ROS, which is said to support Android out of the box. I had many issues using the standard 'android generic' configuration so in the end I created a custom Android configuration for a 'generate_lib' build and linked the resulting library archive to the usual Gradle + CMake build. This works quite nicely as far as building is concerned.

However, I have problems running the simple string publisher code. The program fails right at the beginning during initialization inside rclc_support_init call (I manually traced it a bit further down to rmw_init inside rcl_init). Unfortunately, I could get no indication as to what exactly is failing due to logging being apparently disabled by default for rcl, at least in this build. I tried, to no avail, to enable it by doing the following:

• defined RCL_LOGGING_ENABLED=ON for rcl in colcon.meta,
• included spdlog_vendor inside mcu_ws workspace

This seems to build the logging infrastructure but I still get no logging output.

What else do I need to do to get the logging output from rcl?