force linking inside of skdiff

tools/skdiff_main.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "skdiff.h"
 #include "skdiff_html.h"
 #include "skdiff_utils.h"
 #include "SkBitmap.h"
 #include "SkData.h"
+#include "SkForceLinking.h"
 #include "SkImageDecoder.h"
 #include "SkImageEncoder.h"
 #include "SkOSFile.h"
 #include "SkStream.h"
 #include "SkTDArray.h"
 #include "SkTemplates.h"
 #include "SkTSearch.h"
 #include "SkTypes.h"
 
+__SK_FORCE_IMAGE_DECODER_LINKING;
+
 /**
  * skdiff
  *
  * Given three directory names, expects to find identically-named files in
  * each of the first two; the first are treated as a set of baseline,
  * the second a set of variant images, and a diff image is written into the
  * third directory for each pair.
  * Creates an index.html in the current third directory to compare each
  * pair that does not match exactly.
  * Recursively descends directories, unless run with --norecurse.
@@ skipping 733 matching lines @@
     // range [0...255] are wrapped (mod 256).  Do the conversion ourselves, to
     // make sure that we only return 0 when there were no failures.
     return (num_failing_results > 255) ? 255 : num_failing_results;
 }
 
 #if !defined SK_BUILD_FOR_IOS
 int main(int argc, char * const argv[]) {
     return tool_main(argc, (char**) argv);
 }
 #endif