message: build: suppress libevent warnings if supressing external warnings
diff: @@ -1498,6 +1498,10 @@ if test x$build_bitcoin_cli$build_bitcoind$bitcoin_enable_qt$use_tests$use_bench
  if test x$TARGET_OS != xwindows; then
  PKG_CHECK_MODULES([EVENT_PTHREADS], [libevent_pthreads >= 2.0.21],, [AC_MSG_ERROR([libevent_pthreads version 2.0.21 or greater not found.])])
  fi
  +
  + if test x$suppress_external_warnings != xno; then
  + EVENT_CFLAGS=SUPPRESS_WARNINGS($EVENT_CFLAGS)
  + fi
  fi
  dnl QR Code encoding library check
  