$OpenBSD: patch-coders_png_c,v 1.5 2010/03/28 17:17:15 jasper Exp $
--- coders/png.c.orig	Thu Jan 21 00:32:14 2010
+++ coders/png.c	Sat Feb  6 16:41:48 2010
@@ -1722,7 +1722,7 @@ static Image *ReadOnePNGImage(MngInfo *mng_info,
 #endif
 
 #if defined(PNG_USE_PNGGCCRD) && defined(PNG_ASSEMBLER_CODE_SUPPORTED)  \
-  && (PNG_LIBPNG_VER >= 10200)
+  && (PNG_LIBPNG_VER >= 10200) && defined(PNG_MMX_CODE_SUPPORTED)
   /* Disable thread-unsafe features of pnggccrd */
   if (png_access_version_number() >= 10200)
     {
