From eeb7e724560f8ed3d830726492e0a37f5a438115 Mon Sep 17 00:00:00 2001
From: Michael Fox <415fox@gmail.com>
Date: Thu, 16 Feb 2012 10:02:49 +0900
Subject: Fix: Case where system library has epoll but kernel does not support
 it.

---
 acinclude.m4 | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/acinclude.m4 b/acinclude.m4
index 531568d..e2e3951 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -629,17 +629,20 @@ dnl # LIBXS_CHECK_POLLER_EPOLL([action-if-found], [action-if-not-found])
 dnl # Checks epoll polling system                                                  #
 dnl ################################################################################
 AC_DEFUN([LIBXS_CHECK_POLLER_EPOLL], [{
-    AC_LINK_IFELSE(
+    AC_RUN_IFELSE(
         [AC_LANG_PROGRAM(
         [
 #include <sys/epoll.h>
         ],
 [[
 struct epoll_event t_ev;
-epoll_create(10);
+int r;
+r = epoll_create(10);
+return(r < 0);
 ]]
         )],
         [libxs_cv_have_poller_epoll="yes" ; $1],
+        [libxs_cv_have_poller_epoll="no" ; $2],
         [libxs_cv_have_poller_epoll="no" ; $2])
 }])
 
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