P4FPGA is a toolkit developed at Cornell University that allows network switch programmers to compile and test P4 programs on a variety of FPGA-based networking devices. The toolkit is open-source and the original P4FPGA paper provided a technical overview of the toolkit; this paper describes the more pragmatic aspects of the actual C++ program that constitutes the P4FPGA compiler as well presents guidance on how to use the P4FPGA compiler.