Honor werror variable for untrusted builds.

build/build_nexe.py

 #!/usr/bin/python
 # Copyright (c) 2012 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 from optparse import OptionParser
 import os
 import subprocess
 import sys
 import tempfile
@@ skipping 210 matching lines @@
                            define.startswith('NACL_OSX=') or
                            define.startswith('NACL_LINUX=') or
                            define == 'COMPONENT_BUILD' or
                            'WIN32' in define or
                            'WINDOWS' in define or
                            'WINVER' in define)]
     define_list.extend(['NACL_WINDOWS=0',
                         'NACL_OSX=0',
                         'NACL_LINUX=0'])
     options += ['-D' + define for define in define_list]
-    # TODO(mseaborn): Enable -Werror for ARM/PNaCl when warnings in
-    # Chromium's PPAPI proxy have been fixed, and move -Werror to
-    # untrusted.gypi.
-    # See http://code.google.com/p/nativeclient/issues/detail?id=3108
-    if self.mainarch == 'x86':
-      options.append('-Werror')
     self.compile_options = options + ['-I' + name for name in self.inc_paths]
 
   def BuildLinkOptions(self, options):
     """Generates link options, called once by __init__."""
     options = ArgToList(options)
     if self.outtype == 'nso':
       options += ['-Wl,-rpath-link,' + name for name in self.lib_paths]
       options += ['-shared']
       options += ['-Wl,-soname,' + os.path.basename(self.name)]
     self.link_options = options + ['-L' + name for name in self.lib_paths]
@@ skipping 335 matching lines @@
     out = build.Compile(filename)
     if out:
       objs.append(out)
   # Do not link if building an object
   if not options.compile_only:
     build.Generate(objs)
   return 0
 
 if __name__ == '__main__':
   sys.exit(Main(sys.argv))