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

components/crash/content/app/BUILD.gn

 # Copyright 2014 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.
 
 if (is_android) {
   import("//build/config/android/config.gni")
 }
 
 source_set("lib") {
   sources = [
@@ skipping 95 matching lines @@
     "//base:base_static",
     "//components/crash/core/common",
     "//content/public/common:content_descriptors",
     "//content/public/common:result_codes",
   ]
 
   if (is_android) {
     defines += [ "CHROME_BUILD_ID=" + android_chrome_build_id ]
   }
 
+  if (current_cpu == "x86" && is_clang) {
+    # Clang's -mstackrealign doesn't work well with
+    # linux_syscall_support.h hand written asm syscalls.
+    # See https://crbug.com/556393
+    cflags -= [ "-mstackrealign" ]
+  }
+
   if (is_win) {
     deps += [
       "//sandbox",
       "//breakpad:breakpad_handler",
 
       #'../breakpad/breakpad.gyp:breakpad_sender',  TODO(GYP)
     ]
   } else if (is_posix && !is_ios) {
     deps += [ "//breakpad:client" ]
   }
@@ skipping 22 matching lines @@
     deps += [
       ":lib",
       "//base",
       "//base:base_static",
       "//breakpad",
       "//breakpad:client",
       "//components/crash/core/common",
     ]
   }
 }