From 82ed0423a13d7fe8d3a8bd26f9f7df7093ee63f1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kristian=20H=C3=B8gsberg?= <krh@bitplanet.net>
Date: Mon, 25 Apr 2011 15:41:59 -0400
Subject: [PATCH] compositor-x11: Only use xcb_poll_for_queued_event if we have
 it

Otherwise we can just fall back to xcb_poll_for_event, and just do a
harmless read on the socket.
---
 compositor/compositor-x11.c | 4 ++++
 configure.ac                | 9 +++++++++
 2 files changed, 13 insertions(+)

diff --git a/compositor/compositor-x11.c b/compositor/compositor-x11.c
index 2f02ec37..1996737a 100644
--- a/compositor/compositor-x11.c
+++ b/compositor/compositor-x11.c
@@ -383,7 +383,11 @@ x11_compositor_next_event(struct x11_compositor *c,
 	if (mask & WL_EVENT_READABLE) {
 		*event = xcb_poll_for_event(c->conn);
 	} else {
+#ifdef HAVE_XCB_POLL_FOR_QUEUED_EVENT
 		*event = xcb_poll_for_queued_event(c->conn);
+#else
+		*event = xcb_poll_for_event(c->conn);
+#endif
 	}
 
 	return *event != NULL;
diff --git a/configure.ac b/configure.ac
index 8873bd04..8c5a8af9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -21,6 +21,15 @@ LT_INIT
 
 PKG_PROG_PKG_CONFIG()
 
+PKG_CHECK_MODULES([XCB], xcb)
+xcb_save_LIBS=$LIBS
+xcb_save_CFLAGS=$CFLAGS
+CFLAGS=$XCB_CFLAGS
+LIBS=$XCB_LIBS
+AC_CHECK_FUNCS([xcb_poll_for_queued_event])
+LIBS=$xcb_save_LIBS
+CFLAGS=$xcb_save_CFLAGS
+
 AC_CHECK_FUNC([dlopen], [],
               AC_CHECK_LIB([dl], [dlopen], DLOPEN_LIBS="-ldl"))
 AC_SUBST(DLOPEN_LIBS)