cmake STDLIBS_HAVE_GETRPCBYNUMBER examples

CTSRD-CHERI/cheribsd contrib/tcpdump/CMakeLists.txt :574 

check_function_exists(getrpcbynumber STDLIBS_HAVE_GETRPCBYNUMBER)

CTSRD-CHERI/cheribsd contrib/tcpdump/CMakeLists.txt :577 

else(STDLIBS_HAVE_GETRPCBYNUMBER)

CTSRD-CHERI/cheribsd contrib/tcpdump/CMakeLists.txt :584 

endif(STDLIBS_HAVE_GETRPCBYNUMBER)