Apologies for being a noob here...
Building a custom mmal component based on passthrough.c from git://github.com/raspberrypi/userland.git needs mmal_events_private.h, which is not installed in /opt/vc/include/interface/mmal/core/ from the libraspberrypi-dev package, although it's #included from mmal_port_private.h, which is present.
By copying the file from a git clone all is well, but I'd like the code to be buildable just using the installed packages.
Where is the best place to report this as a possible issue?