[Linux] Turn off -mstackrealign for breakpad in ia32.

components/crash.gypi

 # 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.
 
 {
   'targets': [
     {
       # GN version: //components/crash/core/browser
       'target_name': 'crash_core_browser',
       'type': 'static_library',
@@ skipping 141 matching lines @@
               ],
             }],
             ['os_posix == 1 and OS != "mac" and OS != "ios"', {
               'dependencies': [
                 '../breakpad/breakpad.gyp:breakpad_client',
               ],
               'include_dirs': [
                 '../breakpad/src',
               ],
             }],
+            ['clang==1 and target_arch=="ia32"', {
+              'cflags!': [
+                # Clang's -mstackrealign doesn't work well with
+                # linux_syscall_support.h hand written asm syscalls.
+                # See https://crbug.com/556393
+                '-mstackrealign',
+              ],
+            }],
           ],
           'target_conditions': [
             # Need 'target_conditions' to override default filename_rules to include
             # the files on Android.
             ['OS=="android"', {
               'sources/': [
                 ['include', '^crash/content/app/breakpad_linux\\.cc$'],
               ],
             }],
           ],
@@ skipping 226 matching lines @@
                   ],
                 }],
               ],
             },
           ],
         }],
       ],
     }],
   ],
 }