Enable Arm64 target arch in gyp build config

skia/skia_library_opts.gyp

 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 
 # This gyp file contains the platform-specific optimizations for Skia
 {
   'targets': [
     # Due to an unfortunate intersection of lameness between gcc and gyp,
     # we have to build the *_SSE2.cpp files in a separate target.  The
@@ skipping 20 matching lines @@
         'skia_common.gypi',
       ],
       'include_dirs': [
         '../third_party/skia/include/core',
         '../third_party/skia/include/effects',
         '../third_party/skia/src/core',
         '../third_party/skia/src/opts',
       ],
       'conditions': [
         [ 'os_posix == 1 and OS != "mac" and OS != "android" and \
-           target_arch != "arm" and target_arch != "mipsel"', {
+           target_arch != "arm" and target_arch != "arm64" and \
+           target_arch != "mipsel"', {
           'cflags': [
             '-msse2',
           ],
         }],
-        [ 'target_arch != "arm" and target_arch != "mipsel"', {
+        [ 'target_arch != "arm" and target_arch != "mipsel" and \
+           target_arch != "arm64"', {
           'sources': [
             '../third_party/skia/src/opts/SkBitmapProcState_opts_SSE2.cpp',
             '../third_party/skia/src/opts/SkBlitRect_opts_SSE2.cpp',
             '../third_party/skia/src/opts/SkBlitRow_opts_SSE2.cpp',
             '../third_party/skia/src/opts/SkUtils_opts_SSE2.cpp',
             '../third_party/skia/src/opts/SkXfermode_opts_none.cpp',
             '../third_party/skia/src/opts/SkBitmapFilter_opts_SSE2.cpp',
             '../third_party/skia/src/opts/SkMorphology_opts_SSE2.cpp',
             '../third_party/skia/src/opts/SkBlurImage_opts_SSE2.cpp',
           ],
           'dependencies': [
             'skia_opts_ssse3',
           ],
         }],
         [ 'target_arch == "arm"', {

[Nico, 2014/03/20 15:00:20]

Likely want arm64 here too eventually.

[rmcilroy, 2014/03/20 15:14:54]

Yes, some bits for sure.  I added a todo for now.

           'conditions': [
             [ 'arm_version >= 7 and arm_neon == 1', {
               'defines': [
                 '__ARM_HAVE_NEON',
               ],
             }],
             [ 'arm_version >= 7 and arm_neon_optional == 1', {
               'defines': [
                 '__ARM_HAVE_OPTIONAL_NEON_SUPPORT',
               ],
@@ skipping 190 matching lines @@
               'defines': [
                 '__ARM_HAVE_OPTIONAL_NEON_SUPPORT',
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }