--- /dev/null
+#ifdef HAVE_GLES
+
+int gl_init(void *display, void *window);
+int gl_flip(const void *fb, int w, int h);
+void gl_finish(void);
+
+#else
+
+static __inline int gl_init(void *display, void *window) { return -1; }
+static __inline int gl_flip(const void *fb, int w, int h) { return -1; }
+static __inline void gl_finish(void) {}
+
+#endif