diff --git a/polymer/build/include/sdl_inc.h b/polymer/build/include/sdl_inc.h
new file mode 100644
index 000000000..8996c8a64
--- /dev/null
+++ b/polymer/build/include/sdl_inc.h
@@ -0,0 +1,51 @@
+#ifndef __SDL_INC_H
+#define __SDL_INC_H
+
+#if defined(__APPLE__)
+#  include <SDL/SDL.h>
+#else
+#  include "SDL.h"
+#endif
+
+/* =================================================================
+Minimum required SDL versions:
+=================================================================== */
+
+#define SDL_MIN_X	1
+#define SDL_MIN_Y	2
+#define SDL_MIN_Z	10
+
+#define SDL_REQUIREDVERSION	(SDL_VERSIONNUM(SDL_MIN_X,SDL_MIN_Y,SDL_MIN_Z))
+
+#define SDL_MIXER_MIN_X	1
+#define SDL_MIXER_MIN_Y	2
+#define SDL_MIXER_MIN_Z	7
+#define MIX_REQUIREDVERSION	(SDL_VERSIONNUM(SDL_MIXER_MIN_X,SDL_MIXER_MIN_Y,SDL_MIXER_MIN_Z))
+
+#if !(SDL_VERSION_ATLEAST(SDL_MIN_X,SDL_MIN_Y,SDL_MIN_Z))
+#error SDL version found is too old
+#endif
+
+#if defined(_NEED_SDLMIXER)
+# if defined(__APPLE__)
+#  include <SDL/SDL_mixer.h>
+# else
+#  include "SDL_mixer.h"
+# endif
+/* starting with 1.2.1, SDL_mixer provides MIX_xxx version
+   macros. the new SDL_MIXER_xxx version macros start with
+   1.2.6 but they keep backwards compatibility. 1.2.0 does
+   not even have any version macros, so let's reject it */
+#if !defined(MIX_MAJOR_VERSION) || !defined(MIX_MINOR_VERSION) || !defined(MIX_PATCHLEVEL)
+#error SDL_mixer version found is too old
+#endif
+#ifndef MIX_COMPILEDVERSION
+#define MIX_COMPILEDVERSION	(SDL_VERSIONNUM(MIX_MAJOR_VERSION,MIX_MINOR_VERSION,MIX_PATCHLEVEL))
+#endif
+#if MIX_COMPILEDVERSION < MIX_REQUIREDVERSION
+#error SDL_mixer version found is too old
+#endif	/* end of bad version error */
+#endif	/* end of SDL_mixer checks */
+
+#endif	/* __SDL_INC_H */
+