I don't have CVS access to gnulib; anyway I preferred to have a second opinion.* m4/poll.m4: Test for sys/ioctl.h and sys/filio.h. * lib/poll.c (poll) [__APPLE__]: Use FIONREAD instead of MSG_PEEK.Looks reasonable to me. But you don't need our permission to install; you're the maintainer.
Paolo
