iOS: Fix -msse warnings when building libwebp.

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.
 
 {
   'targets': [
     {
       'target_name': 'libwebp_dec',
       'type': 'static_library',
       'dependencies' : [
@@ skipping 65 matching lines @@
       ],
       'dependencies' : [
         'libwebp_dsp_sse2',
         'libwebp_dsp_sse41',
         'libwebp_utils',
       ],
       'conditions': [
         ['OS == "android"', {
           'dependencies': [ '../../build/android/ndk.gyp:cpu_features' ],
         }],
-        ['target_arch=="ia32" or target_arch=="x64"', {
+        # iOS uses the same project to generate build project for both device
+        # and simulator and do not use "target_arch" variable. Other platform
+        # set it correctly.
+        ['OS!="ios" and (target_arch=="ia32" or target_arch=="x64")', {
           'defines': [ 'WEBP_HAVE_SSE2', 'WEBP_HAVE_SSE41' ],
         }],
         ['order_profiling != 0', {
           'target_conditions' : [
             ['_toolset=="target"', {
               'cflags!': [ '-finstrument-functions' ],
             }],
           ],
         }],
       ],
     },
     {
       'target_name': 'libwebp_dsp_sse2',
       'type': 'static_library',
       'include_dirs': ['.'],
       'sources': [
         'dsp/alpha_processing_sse2.c',
         'dsp/argb_sse2.c',
         'dsp/cost_sse2.c',
         'dsp/dec_sse2.c',
         'dsp/enc_sse2.c',
         'dsp/filters_sse2.c',
         'dsp/lossless_enc_sse2.c',
         'dsp/lossless_sse2.c',
         'dsp/rescaler_sse2.c',
         'dsp/upsampling_sse2.c',
         'dsp/yuv_sse2.c',
       ],
       'conditions': [
-        ['(target_arch=="ia32" or target_arch=="x64") and msan==0', {
+        # iOS uses the same project to generate build project for both device
+        # and simulator and do not use "target_arch" variable. Other platform
+        # set it correctly.
+        ['OS!="ios" and (target_arch=="ia32" or target_arch=="x64") and msan==0', {
           'cflags': [ '-msse2', ],
           'xcode_settings': { 'OTHER_CFLAGS': [ '-msse2' ] },
         }],
         ['order_profiling != 0', {
           'target_conditions' : [
             ['_toolset=="target"', {
               'cflags!': [ '-finstrument-functions' ],
             }],
           ],
         }],
@@ skipping 10 matching lines @@
         'dsp/lossless_enc_sse41.c',
       ],
       'conditions': [
         ['OS=="win" and clang==1', {
           # cl.exe's /arch flag doesn't have a setting for SSSE3/4, and cl.exe
           # doesn't need it for intrinsics. clang-cl does need it, though.
           'msvs_settings': {
             'VCCLCompilerTool': { 'AdditionalOptions': [ '-msse4.1' ] },
           },
         }],
-        ['(target_arch=="ia32" or target_arch=="x64") and msan==0', {
+        # iOS uses the same project to generate build project for both device
+        # and simulator and do not use "target_arch" variable. Other platform
+        # set it correctly.
+        ['OS!="ios" and (target_arch=="ia32" or target_arch=="x64") and msan==0', {
           'cflags': [ '-msse4.1', ],
           'xcode_settings': { 'OTHER_CFLAGS': [ '-msse4.1' ] },
         }],
         ['order_profiling != 0', {
           'target_conditions' : [
             ['_toolset=="target"', {
               'cflags!': [ '-finstrument-functions' ],
             }],
           ],
         }],
@@ skipping 114 matching lines @@
       ],
       'direct_dependent_settings': {
         'include_dirs': ['.'],
       },
       'conditions': [
         ['OS!="win"', {'product_name': 'webp'}],
       ],
     },
   ],
 }