--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/cppbuiltin.c	Sun Aug 21 07:07:55 2011 +0900
@@ -0,0 +1,181 @@
+/* Define builtin-in macros for all front ends that perform preprocessing
+   Copyright (C) 2010
+   Free Software Foundation, Inc.
+
+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 the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "tree.h"
+#include "version.h"
+#include "flags.h"
+#include "cpp-id-data.h"
+#include "cppbuiltin.h"
+#include "target.h"
+
+
+/* Parse a BASEVER version string of the format "major.minor.patchlevel"
+   or "major.minor" to extract its components.  */
+void
+parse_basever (int *major, int *minor, int *patchlevel)
+{
+  static int s_major = -1, s_minor, s_patchlevel;
+
+  if (s_major == -1)
+    if (sscanf (BASEVER, "%d.%d.%d", &s_major, &s_minor, &s_patchlevel) != 3)
+      {
+	sscanf (BASEVER, "%d.%d", &s_major, &s_minor);
+	s_patchlevel = 0;
+      }
+
+  if (major)
+    *major = s_major;
+
+  if (minor)
+    *minor = s_minor;
+
+  if (patchlevel)
+    *patchlevel = s_patchlevel;
+}
+
+
+/* Define __GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__ and __VERSION__.  */
+static void
+define__GNUC__ (cpp_reader *pfile)
+{
+  int major, minor, patchlevel;
+
+  parse_basever (&major, &minor, &patchlevel);
+  cpp_define_formatted (pfile, "__GNUC__=%d", major);
+  cpp_define_formatted (pfile, "__GNUC_MINOR__=%d", minor);
+  cpp_define_formatted (pfile, "__GNUC_PATCHLEVEL__=%d", patchlevel);
+  cpp_define_formatted (pfile, "__VERSION__=\"%s\"", version_string);
+}
+
+
+/* Define various built-in CPP macros that depend on language-independent
+   compilation flags.  */
+static void
+define_builtin_macros_for_compilation_flags (cpp_reader *pfile)
+{
+  if (flag_pic)
+    {
+      cpp_define_formatted (pfile, "__pic__=%d", flag_pic);
+      cpp_define_formatted (pfile, "__PIC__=%d", flag_pic);
+    }
+  if (flag_pie)
+    {
+      cpp_define_formatted (pfile, "__pie__=%d", flag_pie);
+      cpp_define_formatted (pfile, "__PIE__=%d", flag_pie);
+    }
+
+  if (optimize_size)
+    cpp_define (pfile, "__OPTIMIZE_SIZE__");
+  if (optimize)
+    cpp_define (pfile, "__OPTIMIZE__");
+
+  if (fast_math_flags_set_p (&global_options))
+    cpp_define (pfile, "__FAST_MATH__");
+  if (flag_signaling_nans)
+    cpp_define (pfile, "__SUPPORT_SNAN__");
+
+  cpp_define_formatted (pfile, "__FINITE_MATH_ONLY__=%d",
+			flag_finite_math_only);
+}
+
+
+/* Define built-in macros for LP64 targets. */
+static void
+define_builtin_macros_for_lp64 (cpp_reader *pfile)
+{
+  if (TYPE_PRECISION (long_integer_type_node) == 64
+      && POINTER_SIZE == 64
+      && TYPE_PRECISION (integer_type_node) == 32)
+    {
+      cpp_define (pfile, "_LP64");
+      cpp_define (pfile, "__LP64__");
+    }
+}
+
+
+/* Define macros for size of basic C types.  */
+static void
+define_builtin_macros_for_type_sizes (cpp_reader *pfile)
+{
+#define define_type_sizeof(NAME, TYPE)                             \
+    cpp_define_formatted (pfile, NAME"="HOST_WIDE_INT_PRINT_DEC,   \
+                          tree_low_cst (TYPE_SIZE_UNIT (TYPE), 1))
+
+  define_type_sizeof ("__SIZEOF_INT__", integer_type_node);
+  define_type_sizeof ("__SIZEOF_LONG__", long_integer_type_node);
+  define_type_sizeof ("__SIZEOF_LONG_LONG__", long_long_integer_type_node);
+  define_type_sizeof ("__SIZEOF_SHORT__", short_integer_type_node);
+  define_type_sizeof ("__SIZEOF_FLOAT__", float_type_node);
+  define_type_sizeof ("__SIZEOF_DOUBLE__", double_type_node);
+  define_type_sizeof ("__SIZEOF_LONG_DOUBLE__", long_double_type_node);
+  define_type_sizeof ("__SIZEOF_SIZE_T__", size_type_node);
+
+#undef define_type_sizeof
+
+  cpp_define_formatted (pfile, "__CHAR_BIT__=%u",
+			TYPE_PRECISION (char_type_node));
+  cpp_define_formatted (pfile, "__BIGGEST_ALIGNMENT__=%d",
+			BIGGEST_ALIGNMENT / BITS_PER_UNIT);
+
+  /* Define constants useful for implementing endian.h.  */
+  cpp_define (pfile, "__ORDER_LITTLE_ENDIAN__=1234");
+  cpp_define (pfile, "__ORDER_BIG_ENDIAN__=4321");
+  cpp_define (pfile, "__ORDER_PDP_ENDIAN__=3412");
+
+  if (WORDS_BIG_ENDIAN == BYTES_BIG_ENDIAN)
+    cpp_define_formatted (pfile, "__BYTE_ORDER__=%s",
+			  (WORDS_BIG_ENDIAN
+			   ? "__ORDER_BIG_ENDIAN__"
+			   : "__ORDER_LITTLE_ENDIAN__"));
+  else
+    {
+      /* Assert that we're only dealing with the PDP11 case.  */
+      gcc_assert (!BYTES_BIG_ENDIAN);
+      gcc_assert (WORDS_BIG_ENDIAN);
+
+      cpp_define (pfile, "__BYTE_ORDER__=__ORDER_PDP_ENDIAN__");
+    }
+
+  cpp_define_formatted (pfile, "__FLOAT_WORD_ORDER__=%s",
+                        (targetm.float_words_big_endian ()
+                         ? "__ORDER_BIG_ENDIAN__"
+                         : "__ORDER_LITTLE_ENDIAN__"));
+
+  /* ptr_type_node can't be used here since ptr_mode is only set when
+     toplev calls backend_init which is not done with -E switch.  */
+  cpp_define_formatted (pfile, "__SIZEOF_POINTER__=%d",
+			POINTER_SIZE / BITS_PER_UNIT);
+}
+
+
+/* Define macros builtins common to all language performing CPP
+   preprocessing.  */
+void
+define_language_independent_builtin_macros (cpp_reader *pfile)
+{
+  define__GNUC__ (pfile);
+  define_builtin_macros_for_compilation_flags (pfile);
+  define_builtin_macros_for_lp64 (pfile);
+  define_builtin_macros_for_type_sizes (pfile);
+}