* Don't use poll() on OS X. It's implemented on top of select in 10.3 (no

biggie), so we gain nothing there.  On 10.4, it's implemented directly,
  but doesn't support devices (which messes up pty support and IO
  forwarding).

This commit was SVN r5621.

config/ompi_setup_libevent.m4

@@ -78,7 +78,21 @@ fi
 havepoll=no
 havertsig=no
 AC_CHECK_FUNCS(poll, [havepoll=yes], )
-if test "x$havepoll" = "xyes" ; then
+case "$host" in
+    *apple-darwin*)
+        haveworkingpoll=0
+    ;;
+    *)
+        if test "$havepoll" = "yes" ; then
+	    haveworkingpoll=1
+	else
+	    haveworkingpoll=0
+	fi
+    ;;
+esac
+AC_DEFINE_UNQUOTED([HAVE_WORKING_POLL], [$haveworkingpoll], 
+                   [Whether poll works for file descriptors and devices])
+if test "x$havepoll" = "xyes" -a "$haveworkingpoll" = "1" ; then
 	# OMPI: Don't use AC_LIBOBJ
 	sources="poll.c $sources"
 	needsignal=yes

src/event/event.c

@@ -69,7 +69,7 @@
 #if defined(HAVE_SELECT) && HAVE_SELECT
 extern const struct ompi_eventop ompi_selectops;
 #endif
-#if defined(HAVE_POLL) && HAVE_POLL
+#if defined(HAVE_POLL) && HAVE_POLL && HAVE_WORKING_POLL
 extern const struct ompi_eventop ompi_pollops;
 #endif
 #if defined(HAVE_RTSIG) && HAVE_RTSIG
@@ -104,7 +104,7 @@ static const struct ompi_eventop *ompi_eventops[] = {
     &ompi_rtsigops,
 #endif
 #endif
-#if defined(HAVE_POLL) && HAVE_POLL
+#if defined(HAVE_POLL) && HAVE_POLL && HAVE_WORKING_POLL
     &ompi_pollops,
 #endif
 #if defined(HAVE_SELECT) && HAVE_SELECT