From c0a233895cc8270ec0ff0bd2abb88d3f6dd524c3 Mon Sep 17 00:00:00 2001
From: Jeremy Huddleston <jeremyhu@apple.com>
Date: Fri, 4 Mar 2011 12:49:48 -0800
Subject: darwin: Don't use poll() when expected to run on darwin10 and prior

Signed-off-by: Jeremy Huddleston <jeremyhu@apple.com>
---
 configure.ac | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/configure.ac b/configure.ac
index 77ce341..2c35ea4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -67,11 +67,25 @@ AC_SUBST(LDFLAGS_FOR_BUILD)
 
 # Map function checks to old Imake #defines
 case $host_os in
-	# darwin has poll() but can't be used to poll character devices (atleast through SnowLeopard)
-	darwin*) ;;
+	# darwin through Snow Leopard has poll() but can't be used to poll character devices.
+	darwin@<:@789@:>@*|darwin10*) ;;
+	darwin*)
+		_ac_xorg_macosx_version_min=""
+		if echo $CPPFLAGS $CFLAGS | grep -q mmacosx-version-min ; then
+			_ac_xorg_macosx_version_min=`echo $CPPFLAGS $CFLAGS | sed 's/^.*-mmacosx-version-min=\(@<:@^ @:>@*\).*$/\1/'`
+		else
+			_ac_xorg_macosx_version_min=$MACOSX_DEPLOYMENT_TARGET
+		fi
+		case $_ac_xorg_macosx_version_min in
+			10.@<:@0123456@:>@|10.@<:@0123456@:>@.*) ;;
+			*)
+				AC_CHECK_FUNC(poll, [AC_DEFINE(USE_POLL, 1, [poll() function is available])], )
+			;;
+		esac
+		unset _ac_xorg_macosx_version_min
+		;;
 	*)
-		AC_CHECK_FUNC(poll, AC_DEFINE(USE_POLL,1,
-	        	[Define to 1 if you have the "poll" function.]))
+		AC_CHECK_FUNC(poll, [AC_DEFINE(USE_POLL, 1, [poll() function is available])], )
 	;;
 esac
 
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