Why is there no interrupt defined in the system.h file for an interrupt added with the tri-state controller in Qsys?

Description

There is an issue with the generation of the system.h file that prevents some interrupts being correctly defined. As a workaround the user can add a single bit parallel input pin and export this signal to be connected at the top level.  Configure the PIO to generate an interrupt. Then assign the appropriate interrupt level to this interrupt.