Create a build_config header file.

src/include/checked_cast.h

 /*
  * Copyright 2010 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.
  */
 
 //
 // checked_cast.h
 //
 // A template system, intended to be a drop-in replacement for static_cast<>,
 // which performs compile-time and (if necessary) runtime evaluation of
 // integral type casts to detect and handle arithmetic overflow errors.
 //
 #ifndef NATIVE_CLIENT_SRC_INCLUDE_CHECKED_CAST_H_
 #define NATIVE_CLIENT_SRC_INCLUDE_CHECKED_CAST_H_ 1
 
+#include "native_client/src/include/nacl_defines.h"
+
 // Windows defines std::min and std::max in a different header
 // than gcc prior to Visual Studio 2013.
 #if NACL_WINDOWS
 #include <xutility>
 #endif
 
 #include <algorithm>
 #include <limits>
 
 // TODO(ilewis): remove reference to base as soon as we can get COMPILE_ASSERT
@@ skipping 415 matching lines @@
     ::TruncationPolicyAbort<target_t, source_t>
     ::OnTruncate(const source_t&) {
   NaClLog(LOG_FATAL, "Arithmetic overflow");
 
   // Unreachable, assuming that LOG_FATAL really is fatal
   return 0;
 }
 
 
 #endif  /* NATIVE_CLIENT_SRC_INCLUDE_CHECKED_CAST_H_ */