diff -r 000000000000 -r 6474c204b198 gfx/cairo/win32-ffs-gcc.patch
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/cairo/win32-ffs-gcc.patch	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,25 @@
+diff --git a/gfx/cairo/cairo/src/cairo-compiler-private.h b/gfx/cairo/cairo/src/cairo-compiler-private.h
+index ffac9ce..9a05831 100644
+--- a/gfx/cairo/cairo/src/cairo-compiler-private.h
++++ b/gfx/cairo/cairo/src/cairo-compiler-private.h
+@@ -229,16 +229,20 @@ ffs (int x)
+ 
+     if (_BitScanForward(&i, x) != 0)
+ 	return i + 1;
+ 
+     return 0;
+ }
+ #endif
+ 
++#elif defined(__WIN32__) && defined(__GNUC__)
++
++#define ffs(x) __builtin_ffs(x)
++
+ #endif
+ 
+ #if defined(_MSC_VER) && defined(_M_IX86)
+ /* When compiling with /Gy and /OPT:ICF identical functions will be folded in together.
+    The CAIRO_ENSURE_UNIQUE macro ensures that a function is always unique and
+    will never be folded into another one. Something like this might eventually
+    be needed for GCC but it seems fine for now. */
+ #define CAIRO_ENSURE_UNIQUE                       \