cmake HAVE_PF_RING examples

PCSX2/pcsx2 cmake/FindPCAP.cmake :70 

check_function_exists(pcap_get_pfring_id HAVE_PF_RING)

mfontanini/libtins cmake/Modules/FindPCAP.cmake :76 

check_function_exists(pcap_get_pfring_id HAVE_PF_RING)

MRPT/mrpt cmakemodules/FindPCAP.cmake :49 

check_function_exists(pcap_get_pfring_id HAVE_PF_RING)