diff -p -up ClanLib-0.8.1/Sources/GL/canvas_opengl.cpp~ ClanLib-0.8.1/Sources/GL/canvas_opengl.cpp
--- ClanLib-0.8.1/Sources/GL/canvas_opengl.cpp~	2007-10-21 02:14:01.000000000 +0200
+++ ClanLib-0.8.1/Sources/GL/canvas_opengl.cpp	2009-08-17 22:17:45.000000000 +0200
@@ -48,6 +48,7 @@
 #include "graphic_context_opengl.h"
 #include "surface_target_opengl.h"
 #include <cstring>
+#include <cstdio>
 
 /////////////////////////////////////////////////////////////////////////////
 // CL_Canvas_OpenGL construction:
diff -p -up ClanLib-0.8.1/Sources/GL/GLX/input_device_linuxevent.cpp~ ClanLib-0.8.1/Sources/GL/GLX/input_device_linuxevent.cpp
--- ClanLib-0.8.1/Sources/GL/GLX/input_device_linuxevent.cpp~	2007-10-21 02:14:01.000000000 +0200
+++ ClanLib-0.8.1/Sources/GL/GLX/input_device_linuxevent.cpp	2009-08-17 22:19:55.000000000 +0200
@@ -35,6 +35,7 @@
 #include <iostream>
 #include <errno.h>
 #include <cstring>
+#include <cstdio>
 
 #include "API/Core/System/error.h"
 #include "API/Core/System/clanstring.h"
diff -p -up ClanLib-0.8.1/Sources/GL/GLX/input_device_xinput.cpp~ ClanLib-0.8.1/Sources/GL/GLX/input_device_xinput.cpp
--- ClanLib-0.8.1/Sources/GL/GLX/input_device_xinput.cpp~	2007-10-21 02:14:01.000000000 +0200
+++ ClanLib-0.8.1/Sources/GL/GLX/input_device_xinput.cpp	2009-08-17 22:21:15.000000000 +0200
@@ -29,6 +29,7 @@
 
 #include <iostream>
 #include <cstring>
+#include <cstdio>
 #include "API/Core/System/log.h"
 #include "API/Display/input_device.h"
 #include "API/Display/input_event.h"