From 7fdc35bb45bff6b819cf13f981725054dc91a51a Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Sat, 22 Feb 2020 23:27:08 +0100
Subject: [PATCH] Fix Unix compile with older libwebsockets

Debian/Ubuntu still only ship libwebsockets 2.x.
Recent libWS abstracts the poll interface to be
compatible with Windows.
---
 libs/surfaces/websockets/server.cc | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/libs/surfaces/websockets/server.cc b/libs/surfaces/websockets/server.cc
index c5b557a0c5..b4f599d949 100644
--- a/libs/surfaces/websockets/server.cc
+++ b/libs/surfaces/websockets/server.cc
@@ -23,6 +23,21 @@
 #include "server.h"
 #include "dispatcher.h"
 
+/* backport from libwebsockets 3.0,
+ * allow to compile on GNU/Linux with libwebsockets 2.x
+ */
+#ifndef PLATFORM_WINDOWS
+# ifndef LWS_POLLHUP
+#  define LWS_POLLHUP (POLLHUP|POLLERR)
+# endif
+# ifndef LWS_POLLIN
+#  define LWS_POLLIN (POLLIN)
+# endif
+# ifndef LWS_POLLOUT
+#  define LWS_POLLOUT (POLLOUT)
+# endif
+#endif
+
 using namespace Glib;
 
 WebsocketsServer::WebsocketsServer (ArdourSurface::ArdourWebsockets& surface)