drop HAVE_SIGPOLL stuff (no longer needed by System.Posix.Signals)
drop HAVE_SIGPOLL stuff (no longer needed by System.Posix.Signals)
FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs