--- src/cairo.c.orig	2010-09-24 16:01:58.899988587 +0200
+++ src/cairo.c	2010-09-24 16:02:13.313170255 +0200
@@ -149,6 +149,10 @@
 };
 #include <assert.h>
 
+#ifdef __MINGW32__
+#define ffs __builtin_ffs
+#endif
+
 /**
  * _cairo_error:
  * @status: a status value indicating an error, (eg. not