local USE flag

poll

Use poll() instead of select() for the provided asynchronous resolver library.

Package	“poll” Flag Description
mail-filter/opendkim	Use poll() instead of select() for the provided asynchronous resolver library.
mail-filter/libmilter	Use poll instead of select
x11-wm/e16	Use poll() event handler API (recommended)
mail-filter/mimedefang	Use poll instead of select