#PATCH-FIX-UPSTREAM fix-pkg-config-opencv-flags.patch -- https://groups.google.com/d/msg/mod-pagespeed-discuss/7gFC8mW3_2Q/vhkHbJgZg30J
--- apache-mod_pagespeed/modpagespeed/src/third_party/opencv/opencv.gyp~	2013-03-02 14:27:03.587319085 +0200
+++ apache-mod_pagespeed/modpagespeed/src/third_party/opencv/opencv.gyp	2013-03-02 14:58:26.304299923 +0200
@@ -190,7 +190,7 @@
               '<!@(pkg-config --libs-only-L --libs-only-other opencv)',
             ],
             'libraries': [
-              '<!@(pkg-config --libs-only-l opencv)',
+              '<!@(pkg-config --libs opencv)',
             ],
           },
         },