• Set a breakpoint some where in the main.cpp
• Compile in debug mode to Android (arm gcc 4.8) and execute

The breakpoint will be reached as expected and it is possible to single-step from this point. However, it is not possible to evaluate any variables while debugging. Also it is not possible to set a break-point in any sub-function calls.
I get the same behavoir for any project I try to debug for Android and regardless if I use the emulator or deploy on a real device.