GYP changes for arm64 linux build

third_party/libwebp/libwebp.gyp

 # Copyright (c) 2012 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.
 
 {
   'target_defaults': {
     'conditions': [
       ['os_posix==1 and (target_arch=="arm" or target_arch=="arm64")', {
         'cflags!': [ '-Os' ],
         'cflags': [ '-O2' ],
@@ skipping 163 matching lines @@
             'dsp/lossless_neon.c',
             'dsp/rescaler_neon.c',
             'dsp/upsampling_neon.c',
           ],
           'conditions': [
             ['target_arch == "arm" and arm_version >= 7 and (arm_neon == 1 or arm_neon_optional == 1)', {
               # behavior similar to *.c.neon in an Android.mk
               'cflags!': [ '-mfpu=vfpv3-d16' ],
               'cflags': [ '-mfpu=neon' ],
             }],
-            ['target_arch == "arm64"', {
+            ['target_arch == "arm64" and not (OS == "linux" and clang == 1)', {

[Nico, 2016/06/02 17:57:24]

I think you can just add `and clang!=1` here. You don't need a new comment
either: The existing comment already says this works around a gcc bug, it makes
sense that clang doesn't have gcc bugs :-)

[apatole, 2016/06/03 06:11:47]

OK, will do.

[apatole, 2016/06/03 11:33:44]

Done.

               # avoid an ICE with gcc-4.9: b/15574841
+              # Disable it for clang build of linux arm64 as it fails with error - unsupported flag.
               'cflags': [ '-frename-registers' ],
             }],
           ]
         }, {
           'type': 'none',
         }],
       ],
     },
     {
       'target_name': 'libwebp_enc',
@@ skipping 65 matching lines @@
       ],
       'direct_dependent_settings': {
         'include_dirs': ['.'],
       },
       'conditions': [
         ['OS!="win"', {'product_name': 'webp'}],
       ],
     },
   ],
 }