From 539afc5d0bc8d581d7a7e9f87694046989bbe8f2 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Tue, 1 Nov 2016 10:33:44 -0700
Subject: [PATCH] Fixed bug 3473 - can't build on linux with an old kernel

---
 src/core/linux/SDL_evdev.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/core/linux/SDL_evdev.c b/src/core/linux/SDL_evdev.c
index 4761f3e46..642d00c27 100644
--- a/src/core/linux/SDL_evdev.c
+++ b/src/core/linux/SDL_evdev.c
@@ -57,6 +57,14 @@
 #define SYN_DROPPED 3
 #endif
 
+/* These are not defined in older Linux kernel headers */
+#ifndef ABS_MT_SLOT
+#define ABS_MT_SLOT         0x2f
+#define ABS_MT_POSITION_X   0x35
+#define ABS_MT_POSITION_Y   0x36
+#define ABS_MT_TRACKING_ID  0x39
+#endif
+
 typedef struct SDL_evdevlist_item
 {
     char *path;