Macintosh:lib$ nm -A libpq.a | grep close
libpq.a:fe-auth.o: U _krb5_cc_close
libpq.a:fe-connect.o: U _close
libpq.a:fe-connect.o: 000004dc t _closePGconn
libpq.a:fe-connect.o: U _fclose
libpq.a:fe-connect.o: U _pqsecure_close
libpq.a:fe-misc.o: U _close
libpq.a:fe-misc.o: U _pqsecure_close
libpq.a:fe-print.o: U _pclose
libpq.a:fe-lobj.o: U _close
libpq.a:fe-lobj.o: 000009fa T _lo_close
libpq.a:fe-protocol3.o: U _close
libpq.a:fe-protocol3.o: U _pqsecure_close
libpq.a:fe-secure.o: 000000a1 t _close_SSL
libpq.a:fe-secure.o: U _fclose
libpq.a:fe-secure.o: 000000f6 T _pqsecure_close