Disable sysroot for x86 and x64 only

libyuv.gyp

 # Copyright 2011 The LibYuv Project Authors. All rights reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS. All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 {
   'includes': [
     'libyuv.gypi',
   ],
   # Make sure that if we are being compiled to an xcodeproj, nothing tries to
   # include a .pch.
   'xcode_settings': {
     'GCC_PREFIX_HEADER': '',
     'GCC_PRECOMPILE_PREFIX_HEADER': 'NO',
   },
   'variables': {
     'variables': {
       # Disable use of sysroot for Linux. It's enabled by default in Chromium,
       # but it currently lacks the libudev-dev package.
       # TODO(kjellander): Remove when crbug.com/561584 is fixed.
-      'use_sysroot': 0,
+      'conditions': [
+         ['target_arch=="ia32" or target_arch=="x64"', {

[kjellander_chromium, 2015/12/21 18:59:48]

I'm not sure about ARM here, so please run the trybots to ensure Android still
builds.

+           'use_sysroot': 0,
+         }, {
+           'use_sysroot%': 1,
+         }],
+       ],
     },
     'use_sysroot%': '<(use_sysroot)',
     'use_system_libjpeg%': 0,
     'libyuv_disable_jpeg%': 0,
     # 'chromium_code' treats libyuv as internal and increases warning level.
     'chromium_code': 1,
     # Link-Time Optimizations.
     'use_lto%': 0,
     'build_neon': 0,
     'conditions': [
@@ skipping 110 matching lines @@
       ],
     },
   ], # targets.
 }
 
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