Add CPP def for PNaCl biased bc newlib builds to omit memcpy, memmove, etc.

toolchain_build/pnacl_targetlibs.py

 #!/usr/bin/python
 # Copyright (c) 2013 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.
 
 """Recipes for PNaCl target libs."""
 
 import fnmatch
 import os
 import sys
@@ skipping 308 matching lines @@
 
 
 def TargetLibBuildType(is_canonical):
   return 'build' if is_canonical else 'build_noncanonical'
 
 def TargetLibs(bias_arch, is_canonical):
   def T(component_name):
     return GSDJoin(component_name, bias_arch)
   target_triple = TripleFromArch(bias_arch)
   newlib_triple = target_triple if not IsBCArch(bias_arch) else 'le32-nacl'
+  newlib_cpp_flags = ' -DPNACL_BITCODE' if IsBCArch(bias_arch) else ''
   clang_libdir = os.path.join(
       '%(output)s', 'lib', 'clang', CLANG_VER, 'lib', target_triple)
   libc_libdir = os.path.join('%(output)s', MultilibLibDir(bias_arch))
   libs = {
       T('newlib'): {
           'type': TargetLibBuildType(is_canonical),
           'dependencies': [ 'newlib_src', 'target_lib_compiler'],
           'commands' : [
               command.SkipForIncrementalCommand(
                   ['sh', '%(newlib_src)s/configure'] +
                   TargetTools(bias_arch) +
-                  ['CFLAGS_FOR_TARGET=' + TargetLibCflags(bias_arch),
+                  ['CFLAGS_FOR_TARGET=' +
+                      TargetLibCflags(bias_arch) +
+                      newlib_cpp_flags,
                   '--prefix=',
                   '--disable-newlib-supplied-syscalls',
                   '--disable-texinfo',
                   '--disable-libgloss',
                   '--enable-newlib-iconv',
                   '--enable-newlib-iconv-from-encodings=' +
                   'UTF-8,UTF-16LE,UCS-4LE,UTF-16,UCS-4',
                   '--enable-newlib-iconv-to-encodings=' +
                   'UTF-8,UTF-16LE,UCS-4LE,UTF-16,UCS-4',
                   '--enable-newlib-io-long-long',
@@ skipping 423 matching lines @@
                  'includedir=' +os.path.join('%(output)s',
                                              TripleFromArch(MultilibArch(arch)),
                                              'include'),
                  'libdir=' + os.path.join('%(output)s', MultilibLibDir(arch)),
                  'install'] + scons_flags,
                 cwd=NACL_DIR),
           ],
       }
   }
   return libs