Predefine __LITTLE_ENDIAN__

gcc/config/i386/nacl.h

 /* Target definitions for GCC for NativeClient using ELF
    Copyright (C) 1988, 1991, 1995, 2000, 2001, 2002
    Free Software Foundation, Inc.
 
    Derived from sysv4.h written by Ron Guilmette (rfg@netcom.com).
 
 This file is part of GCC.
 
 GCC is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ skipping 178 matching lines @@
 #ifdef __native_client__
 #define HOST_LACKS_INODE_NUMBERS 1
 #endif
 
 #undef TARGET_OS_CPP_BUILTINS
 #define TARGET_OS_CPP_BUILTINS()                        \
   do                                                    \
     {                                                   \
         LINUX_TARGET_OS_CPP_BUILTINS();                 \
         builtin_define ("__native_client__=1");         \
+        builtin_define ("__LITTLE_ENDIAN__");           \
   }                                                     \
   while (0)
 
 /* NaCl uses are using ILP32 model even on x86-84.  */
 #undef LONG_TYPE_SIZE
 #define LONG_TYPE_SIZE 32
 #define POINTER_SIZE 32
 #define POINTERS_EXTEND_UNSIGNED 1
 #undef LONG_DOUBLE_TYPE_SIZE
 #define LONG_DOUBLE_TYPE_SIZE 64
@@ skipping 61 matching lines @@
                    (POINTER_SIZE / BITS_PER_UNIT))
 
 /* -Os is broken and we aren't putting the work into fixing it.
    See http://code.google.com/p/nativeclient/issues/detail?id=2284  */
 #undef  SUBTARGET_OVERRIDE_OPTIONS
 #define SUBTARGET_OVERRIDE_OPTIONS                                            \
   do {                                                                        \
     if (TARGET_NACL && optimize_size)                                         \
       error ("-Os is not supported by the Native Client compiler");           \
   } while (0)