cmake ZMQ_HAVE_SO_PEERCRED examples

zeromq/libzmq CMakeLists.txt :590 

check_cxx_symbol_exists(SO_PEERCRED sys/socket.h ZMQ_HAVE_SO_PEERCRED)

zeromq/zeromq4-1 CMakeLists.txt :151 

check_cxx_symbol_exists(SO_PEERCRED sys/socket.h ZMQ_HAVE_SO_PEERCRED)

asset-group/5ghoul-5g-nr-attacks libs/libzmq/CMakeLists.txt :538 

check_cxx_symbol_exists(SO_PEERCRED sys/socket.h ZMQ_HAVE_SO_PEERCRED)