PNaCl: Build a PPAPI shims library for all architectures

ppapi/generators/idl_gen_pnacl.py

 #!/usr/bin/env python
 # 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.
 
 """Generator for Pnacl Shim functions that bridges the calling conventions
 between GCC and PNaCl.  """
 
 from datetime import datetime
 import difflib
@@ skipping 33 matching lines @@
     self._skip_opt = False
     self._pnacl_attribute = '__attribute__((pnaclcall))'
 
   ############################################################
 
   def OwnHeaderFile(self):
     """Return the header file that specifies the API of this wrapper.
     We do not generate the header files.  """
     return 'ppapi/generators/pnacl_shim.h'
 
+  def GetGuardStart(self):
+    return ('\n/* The PNaCl PPAPI shims are only needed on x86-64. */\n'
+            '#if defined(__x86_64__)\n\n')
+
+  def GetGuardEnd(self):
+    return '\n#endif\n'
+
   def InterfaceNeedsWrapper(self, iface, releases):
     """Return true if the interface has ANY methods that need wrapping.
     """
     if self._skip_opt:
       return True
     for release in iface.GetUniqueReleases(releases):
       version = iface.GetVersion(release)
       if self.InterfaceVersionNeedsWrapping(iface, version):
         return True
     return False
@@ skipping 162 matching lines @@
     return TestFiles(filenames, test_releases)
 
   # Otherwise, generate the output file (for potential use as golden file).
   ast = ParseFiles(filenames)
   return pnaclgen.GenerateRange(ast, test_releases, filenames)
 
 
 if __name__ == '__main__':
   retval = Main(sys.argv[1:])
   sys.exit(retval)