--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/c-common.h	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,1045 @@
+/* Definitions for c-common.c.
+   Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
+   1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008
+   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/>.  */
+
+#ifndef GCC_C_COMMON_H
+#define GCC_C_COMMON_H
+
+#include "splay-tree.h"
+#include "cpplib.h"
+#include "ggc.h"
+
+/* Usage of TREE_LANG_FLAG_?:
+   0: TREE_NEGATED_INT (in INTEGER_CST).
+      IDENTIFIER_MARKED (used by search routines).
+      DECL_PRETTY_FUNCTION_P (in VAR_DECL)
+   1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
+      STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST)
+   2: unused
+   3: STATEMENT_LIST_HAS_LABEL (in STATEMENT_LIST)
+   4: unused
+*/
+
+/* Reserved identifiers.  This is the union of all the keywords for C,
+   C++, and Objective-C.  All the type modifiers have to be in one
+   block at the beginning, because they are used as mask bits.  There
+   are 27 type modifiers; if we add many more we will have to redesign
+   the mask mechanism.  */
+
+enum rid
+{
+  /* Modifiers: */
+  /* C, in empirical order of frequency.  */
+  RID_STATIC = 0,
+  RID_UNSIGNED, RID_LONG,    RID_CONST, RID_EXTERN,
+  RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
+  RID_VOLATILE, RID_SIGNED,  RID_AUTO,  RID_RESTRICT,
+
+  /* C extensions */
+  RID_COMPLEX, RID_THREAD, RID_SAT,
+
+  /* C++ */
+  RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
+
+  /* ObjC */
+  RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
+
+  /* C */
+  RID_INT,     RID_CHAR,   RID_FLOAT,    RID_DOUBLE, RID_VOID,
+  RID_ENUM,    RID_STRUCT, RID_UNION,    RID_IF,     RID_ELSE,
+  RID_WHILE,   RID_DO,     RID_FOR,      RID_SWITCH, RID_CASE,
+  RID_DEFAULT, RID_BREAK,  RID_CONTINUE, RID_RETURN, RID_GOTO,
+  RID_SIZEOF,
+
+  /* C extensions */
+  RID_ASM,       RID_TYPEOF,   RID_ALIGNOF,  RID_ATTRIBUTE,  RID_VA_ARG,
+  RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL,      RID_CHOOSE_EXPR,
+  RID_TYPES_COMPATIBLE_P,
+  RID_DFLOAT32, RID_DFLOAT64, RID_DFLOAT128,
+  RID_FRACT, RID_ACCUM,
+
+  /* This means to warn that this is a C++ keyword, and then treat it
+     as a normal identifier.  */
+  RID_CXX_COMPAT_WARN,
+
+  /* Too many ways of getting the name of a function as a string */
+  RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
+
+  /* C++ */
+  RID_BOOL,     RID_WCHAR,    RID_CLASS,
+  RID_PUBLIC,   RID_PRIVATE,  RID_PROTECTED,
+  RID_TEMPLATE, RID_NULL,     RID_CATCH,
+  RID_DELETE,   RID_FALSE,    RID_NAMESPACE,
+  RID_NEW,      RID_OFFSETOF, RID_OPERATOR,
+  RID_THIS,     RID_THROW,    RID_TRUE,
+  RID_TRY,      RID_TYPENAME, RID_TYPEID,
+  RID_USING,    RID_CHAR16,   RID_CHAR32,
+
+  /* casts */
+  RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
+
+  /* C++ extensions */
+  RID_HAS_NOTHROW_ASSIGN,      RID_HAS_NOTHROW_CONSTRUCTOR,
+  RID_HAS_NOTHROW_COPY,        RID_HAS_TRIVIAL_ASSIGN,
+  RID_HAS_TRIVIAL_CONSTRUCTOR, RID_HAS_TRIVIAL_COPY,
+  RID_HAS_TRIVIAL_DESTRUCTOR,  RID_HAS_VIRTUAL_DESTRUCTOR,
+  RID_IS_ABSTRACT,             RID_IS_BASE_OF,
+  RID_IS_CONVERTIBLE_TO,       RID_IS_CLASS,
+  RID_IS_EMPTY,                RID_IS_ENUM,
+  RID_IS_POD,                  RID_IS_POLYMORPHIC,
+  RID_IS_UNION,
+
+  /* C++0x */
+  RID_STATIC_ASSERT, RID_DECLTYPE,
+
+  /* Objective-C */
+  RID_AT_ENCODE,   RID_AT_END,
+  RID_AT_CLASS,    RID_AT_ALIAS,     RID_AT_DEFS,
+  RID_AT_PRIVATE,  RID_AT_PROTECTED, RID_AT_PUBLIC,
+  RID_AT_PROTOCOL, RID_AT_SELECTOR,
+  RID_AT_THROW,	   RID_AT_TRY,       RID_AT_CATCH,
+  RID_AT_FINALLY,  RID_AT_SYNCHRONIZED,
+  RID_AT_INTERFACE,
+  RID_AT_IMPLEMENTATION,
+
+  RID_MAX,
+
+  RID_FIRST_MODIFIER = RID_STATIC,
+  RID_LAST_MODIFIER = RID_ONEWAY,
+
+  RID_FIRST_CXX0X = RID_STATIC_ASSERT,
+  RID_LAST_CXX0X = RID_DECLTYPE,
+  RID_FIRST_AT = RID_AT_ENCODE,
+  RID_LAST_AT = RID_AT_IMPLEMENTATION,
+  RID_FIRST_PQ = RID_IN,
+  RID_LAST_PQ = RID_ONEWAY
+};
+
+#define OBJC_IS_AT_KEYWORD(rid) \
+  ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
+   (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
+
+#define OBJC_IS_PQ_KEYWORD(rid) \
+  ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
+   (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
+
+/* The elements of `ridpointers' are identifier nodes for the reserved
+   type names and storage classes.  It is indexed by a RID_... value.  */
+extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
+
+/* Standard named or nameless data types of the C compiler.  */
+
+enum c_tree_index
+{
+    CTI_CHAR16_TYPE,
+    CTI_CHAR32_TYPE,
+    CTI_WCHAR_TYPE,
+    CTI_SIGNED_WCHAR_TYPE,
+    CTI_UNSIGNED_WCHAR_TYPE,
+    CTI_WINT_TYPE,
+    CTI_SIGNED_SIZE_TYPE, /* For format checking only.  */
+    CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only.  */
+    CTI_INTMAX_TYPE,
+    CTI_UINTMAX_TYPE,
+    CTI_WIDEST_INT_LIT_TYPE,
+    CTI_WIDEST_UINT_LIT_TYPE,
+
+    CTI_CHAR_ARRAY_TYPE,
+    CTI_CHAR16_ARRAY_TYPE,
+    CTI_CHAR32_ARRAY_TYPE,
+    CTI_WCHAR_ARRAY_TYPE,
+    CTI_INT_ARRAY_TYPE,
+    CTI_STRING_TYPE,
+    CTI_CONST_STRING_TYPE,
+
+    /* Type for boolean expressions (bool in C++, int in C).  */
+    CTI_TRUTHVALUE_TYPE,
+    CTI_TRUTHVALUE_TRUE,
+    CTI_TRUTHVALUE_FALSE,
+
+    CTI_DEFAULT_FUNCTION_TYPE,
+
+    /* These are not types, but we have to look them up all the time.  */
+    CTI_FUNCTION_NAME_DECL,
+    CTI_PRETTY_FUNCTION_NAME_DECL,
+    CTI_C99_FUNCTION_NAME_DECL,
+    CTI_SAVED_FUNCTION_NAME_DECLS,
+
+    CTI_VOID_ZERO,
+
+    CTI_NULL,
+
+    CTI_MAX
+};
+
+#define C_CPP_HASHNODE(id) \
+  (&(((struct c_common_identifier *) (id))->node))
+#define C_RID_CODE(id) \
+  ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
+#define C_SET_RID_CODE(id, code) \
+  (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
+
+/* Identifier part common to the C front ends.  Inherits from
+   tree_identifier, despite appearances.  */
+struct c_common_identifier GTY(())
+{
+  struct tree_common common;
+  struct cpp_hashnode node;
+};
+
+/* An entry in the reserved keyword table.  */
+
+struct c_common_resword
+{
+  const char *const word;
+  ENUM_BITFIELD(rid) const rid : 16;
+  const unsigned int disable   : 16;
+};
+
+/* Disable mask.  Keywords are disabled if (reswords[i].disable &
+   mask) is _true_.  Thus for keywords which are present in all
+   languages the disable field is zero.  */
+
+#define D_CONLY		0x001	/* C only (not in C++).  */
+#define D_CXXONLY	0x002	/* C++ only (not in C).  */
+#define D_C99		0x004	/* In C, C99 only.  */
+#define D_CXX0X         0x008	/* In C++, C++0X only.  */
+#define D_EXT		0x010	/* GCC extension.  */
+#define D_EXT89		0x020	/* GCC extension incorporated in C99.  */
+#define D_ASM		0x040	/* Disabled by -fno-asm.  */
+#define D_OBJC		0x080	/* In Objective C and neither C nor C++.  */
+#define D_CXX_OBJC	0x100	/* In Objective C, and C++, but not C.  */
+#define D_CXXWARN	0x200	/* In C warn with -Wcxx-compat.  */
+
+/* The reserved keyword table.  */
+extern const struct c_common_resword c_common_reswords[];
+
+/* The number of items in the reserved keyword table.  */
+extern const unsigned int num_c_common_reswords;
+
+#define char16_type_node		c_global_trees[CTI_CHAR16_TYPE]
+#define char32_type_node		c_global_trees[CTI_CHAR32_TYPE]
+#define wchar_type_node			c_global_trees[CTI_WCHAR_TYPE]
+#define signed_wchar_type_node		c_global_trees[CTI_SIGNED_WCHAR_TYPE]
+#define unsigned_wchar_type_node	c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
+#define wint_type_node			c_global_trees[CTI_WINT_TYPE]
+#define signed_size_type_node		c_global_trees[CTI_SIGNED_SIZE_TYPE]
+#define unsigned_ptrdiff_type_node	c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
+#define intmax_type_node		c_global_trees[CTI_INTMAX_TYPE]
+#define uintmax_type_node		c_global_trees[CTI_UINTMAX_TYPE]
+#define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
+#define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
+
+#define truthvalue_type_node		c_global_trees[CTI_TRUTHVALUE_TYPE]
+#define truthvalue_true_node		c_global_trees[CTI_TRUTHVALUE_TRUE]
+#define truthvalue_false_node		c_global_trees[CTI_TRUTHVALUE_FALSE]
+
+#define char_array_type_node		c_global_trees[CTI_CHAR_ARRAY_TYPE]
+#define char16_array_type_node		c_global_trees[CTI_CHAR16_ARRAY_TYPE]
+#define char32_array_type_node		c_global_trees[CTI_CHAR32_ARRAY_TYPE]
+#define wchar_array_type_node		c_global_trees[CTI_WCHAR_ARRAY_TYPE]
+#define int_array_type_node		c_global_trees[CTI_INT_ARRAY_TYPE]
+#define string_type_node		c_global_trees[CTI_STRING_TYPE]
+#define const_string_type_node		c_global_trees[CTI_CONST_STRING_TYPE]
+
+#define default_function_type		c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
+
+#define function_name_decl_node		c_global_trees[CTI_FUNCTION_NAME_DECL]
+#define pretty_function_name_decl_node	c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
+#define c99_function_name_decl_node		c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
+#define saved_function_name_decls	c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
+
+/* A node for `((void) 0)'.  */
+#define void_zero_node                  c_global_trees[CTI_VOID_ZERO]
+
+/* The node for C++ `__null'.  */
+#define null_node                       c_global_trees[CTI_NULL]
+
+extern GTY(()) tree c_global_trees[CTI_MAX];
+
+/* In a RECORD_TYPE, a sorted array of the fields of the type, not a
+   tree for size reasons.  */
+struct sorted_fields_type GTY(())
+{
+  int len;
+  tree GTY((length ("%h.len"))) elts[1];
+};
+
+/* Mark which labels are explicitly declared.
+   These may be shadowed, and may be referenced from nested functions.  */
+#define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
+
+typedef enum c_language_kind
+{
+  clk_c		= 0,		/* C90, C94 or C99 */
+  clk_objc	= 1,		/* clk_c with ObjC features.  */
+  clk_cxx	= 2,		/* ANSI/ISO C++ */
+  clk_objcxx	= 3		/* clk_cxx with ObjC features.  */
+}
+c_language_kind;
+
+/* To test for a specific language use c_language, defined by each
+   front end.  For "ObjC features" or "not C++" use the macros.  */
+extern c_language_kind c_language;
+
+#define c_dialect_cxx()		(c_language & clk_cxx)
+#define c_dialect_objc()	(c_language & clk_objc)
+
+/* Information about a statement tree.  */
+
+struct stmt_tree_s GTY(()) {
+  /* The current statement list being collected.  */
+  tree x_cur_stmt_list;
+
+  /* In C++, Nonzero if we should treat statements as full
+     expressions.  In particular, this variable is no-zero if at the
+     end of a statement we should destroy any temporaries created
+     during that statement.  Similarly, if, at the end of a block, we
+     should destroy any local variables in this block.  Normally, this
+     variable is nonzero, since those are the normal semantics of
+     C++.
+
+     However, in order to represent aggregate initialization code as
+     tree structure, we use statement-expressions.  The statements
+     within the statement expression should not result in cleanups
+     being run until the entire enclosing statement is complete.
+
+     This flag has no effect in C.  */
+  int stmts_are_full_exprs_p;
+};
+
+typedef struct stmt_tree_s *stmt_tree;
+
+/* Global state pertinent to the current function.  Some C dialects
+   extend this structure with additional fields.  */
+
+struct c_language_function GTY(()) {
+  /* While we are parsing the function, this contains information
+     about the statement-tree that we are building.  */
+  struct stmt_tree_s x_stmt_tree;
+};
+
+/* When building a statement-tree, this is the current statement list
+   being collected.  It's TREE_CHAIN is a back-pointer to the previous
+   statement list.  */
+
+#define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
+
+/* Language-specific hooks.  */
+
+/* If non-NULL, this function is called after a precompile header file
+   is loaded.  */
+extern void (*lang_post_pch_load) (void);
+
+extern void push_file_scope (void);
+extern void pop_file_scope (void);
+extern stmt_tree current_stmt_tree (void);
+extern tree push_stmt_list (void);
+extern tree pop_stmt_list (tree);
+extern tree add_stmt (tree);
+extern void push_cleanup (tree, tree, bool);
+extern tree pushdecl_top_level (tree);
+extern tree pushdecl (tree);
+extern tree build_modify_expr (location_t, tree, enum tree_code, tree);
+extern tree build_indirect_ref (location_t, tree, const char *);
+
+extern int c_expand_decl (tree);
+
+extern int field_decl_cmp (const void *, const void *);
+extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
+				  void *);
+extern bool has_c_linkage (const_tree decl);
+
+/* Switches common to the C front ends.  */
+
+/* Nonzero if prepreprocessing only.  */
+
+extern int flag_preprocess_only;
+
+/* Zero means that faster, ...NonNil variants of objc_msgSend...
+   calls will be used in ObjC; passing nil receivers to such calls
+   will most likely result in crashes.  */
+extern int flag_nil_receivers;
+
+/* Nonzero means that we will allow new ObjC exception syntax (@throw,
+   @try, etc.) in source code.  */
+extern int flag_objc_exceptions;
+
+/* Nonzero means that we generate NeXT setjmp based exceptions.  */
+extern int flag_objc_sjlj_exceptions;
+
+/* Nonzero means that code generation will be altered to support
+   "zero-link" execution.  This currently affects ObjC only, but may
+   affect other languages in the future.  */
+extern int flag_zero_link;
+
+/* Nonzero means emit an '__OBJC, __image_info' for the current translation
+   unit.  It will inform the ObjC runtime that class definition(s) herein
+   contained are to replace one(s) previously loaded.  */
+extern int flag_replace_objc_classes;
+
+/* Nonzero means don't output line number information.  */
+
+extern char flag_no_line_commands;
+
+/* Nonzero causes -E output not to be done, but directives such as
+   #define that have side effects are still obeyed.  */
+
+extern char flag_no_output;
+
+/* Nonzero means dump macros in some fashion; contains the 'D', 'M',
+   'N' or 'U' of the command line switch.  */
+
+extern char flag_dump_macros;
+
+/* Nonzero means pass #include lines through to the output.  */
+
+extern char flag_dump_includes;
+
+/* Nonzero means process PCH files while preprocessing.  */
+
+extern bool flag_pch_preprocess;
+
+/* The file name to which we should write a precompiled header, or
+   NULL if no header will be written in this compile.  */
+
+extern const char *pch_file;
+
+/* Nonzero if an ISO standard was selected.  It rejects macros in the
+   user's namespace.  */
+
+extern int flag_iso;
+
+/* Nonzero if -undef was given.  It suppresses target built-in macros
+   and assertions.  */
+
+extern int flag_undef;
+
+/* Nonzero means don't recognize the non-ANSI builtin functions.  */
+
+extern int flag_no_builtin;
+
+/* Nonzero means don't recognize the non-ANSI builtin functions.
+   -ansi sets this.  */
+
+extern int flag_no_nonansi_builtin;
+
+/* Nonzero means give `double' the same size as `float'.  */
+
+extern int flag_short_double;
+
+/* Nonzero means give `wchar_t' the same size as `short'.  */
+
+extern int flag_short_wchar;
+
+/* Nonzero means allow implicit conversions between vectors with
+   differing numbers of subparts and/or differing element types.  */
+extern int flag_lax_vector_conversions;
+
+/* Nonzero means allow Microsoft extensions without warnings or errors.  */
+extern int flag_ms_extensions;
+
+/* Nonzero means don't recognize the keyword `asm'.  */
+
+extern int flag_no_asm;
+
+/* Nonzero means give string constants the type `const char *', as mandated
+   by the standard.  */
+
+extern int flag_const_strings;
+
+/* Nonzero means to treat bitfields as signed unless they say `unsigned'.  */
+
+extern int flag_signed_bitfields;
+
+/* Warn about #pragma directives that are not recognized.  */
+
+extern int warn_unknown_pragmas; /* Tri state variable.  */
+
+/* Warn about format/argument anomalies in calls to formatted I/O functions
+   (*printf, *scanf, strftime, strfmon, etc.).  */
+
+extern int warn_format;
+
+
+/* C/ObjC language option variables.  */
+
+
+/* Nonzero means allow type mismatches in conditional expressions;
+   just make their values `void'.  */
+
+extern int flag_cond_mismatch;
+
+/* Nonzero means enable C89 Amendment 1 features.  */
+
+extern int flag_isoc94;
+
+/* Nonzero means use the ISO C99 dialect of C.  */
+
+extern int flag_isoc99;
+
+/* Nonzero means that we have builtin functions, and main is an int.  */
+
+extern int flag_hosted;
+
+/* ObjC language option variables.  */
+
+
+/* Open and close the file for outputting class declarations, if
+   requested (ObjC).  */
+
+extern int flag_gen_declaration;
+
+/* Tells the compiler that this is a special run.  Do not perform any
+   compiling, instead we are to test some platform dependent features
+   and output a C header file with appropriate definitions.  */
+
+extern int print_struct_values;
+
+/* ???.  Undocumented.  */
+
+extern const char *constant_string_class_name;
+
+
+/* C++ language option variables.  */
+
+
+/* Nonzero means don't recognize any extension keywords.  */
+
+extern int flag_no_gnu_keywords;
+
+/* Nonzero means do emit exported implementations of functions even if
+   they can be inlined.  */
+
+extern int flag_implement_inlines;
+
+/* Nonzero means that implicit instantiations will be emitted if needed.  */
+
+extern int flag_implicit_templates;
+
+/* Nonzero means that implicit instantiations of inline templates will be
+   emitted if needed, even if instantiations of non-inline templates
+   aren't.  */
+
+extern int flag_implicit_inline_templates;
+
+/* Nonzero means generate separate instantiation control files and
+   juggle them at link time.  */
+
+extern int flag_use_repository;
+
+/* Nonzero if we want to issue diagnostics that the standard says are not
+   required.  */
+
+extern int flag_optional_diags;
+
+/* Nonzero means we should attempt to elide constructors when possible.  */
+
+extern int flag_elide_constructors;
+
+/* Nonzero means that member functions defined in class scope are
+   inline by default.  */
+
+extern int flag_default_inline;
+
+/* Controls whether compiler generates 'type descriptor' that give
+   run-time type information.  */
+
+extern int flag_rtti;
+
+/* Nonzero if we want to conserve space in the .o files.  We do this
+   by putting uninitialized data and runtime initialized data into
+   .common instead of .data at the expense of not flagging multiple
+   definitions.  */
+
+extern int flag_conserve_space;
+
+/* Nonzero if we want to obey access control semantics.  */
+
+extern int flag_access_control;
+
+/* Nonzero if we want to check the return value of new and avoid calling
+   constructors if it is a null pointer.  */
+
+extern int flag_check_new;
+
+/* The supported C++ dialects.  */
+
+enum cxx_dialect {
+  /* C++98  */
+  cxx98,
+  /* Experimental features that are likely to become part of
+     C++0x.  */
+  cxx0x
+};
+
+/* The C++ dialect being used. C++98 is the default.  */
+extern enum cxx_dialect cxx_dialect;
+
+/* Nonzero if we want the new ISO rules for pushing a new scope for `for'
+   initialization variables.
+   0: Old rules, set by -fno-for-scope.
+   2: New ISO rules, set by -ffor-scope.
+   1: Try to implement new ISO rules, but with backup compatibility
+   (and warnings).  This is the default, for now.  */
+
+extern int flag_new_for_scope;
+
+/* Nonzero if we want to emit defined symbols with common-like linkage as
+   weak symbols where possible, in order to conform to C++ semantics.
+   Otherwise, emit them as local symbols.  */
+
+extern int flag_weak;
+
+/* 0 means we want the preprocessor to not emit line directives for
+   the current working directory.  1 means we want it to do it.  -1
+   means we should decide depending on whether debugging information
+   is being emitted or not.  */
+
+extern int flag_working_directory;
+
+/* Nonzero to use __cxa_atexit, rather than atexit, to register
+   destructors for local statics and global objects.  */
+
+extern int flag_use_cxa_atexit;
+
+/* Nonzero to use __cxa_get_exception_ptr in the C++ exception-handling
+   logic.  */
+
+extern int flag_use_cxa_get_exception_ptr;
+
+/* Nonzero means to implement standard semantics for exception
+   specifications, calling unexpected if an exception is thrown that
+   doesn't match the specification.  Zero means to treat them as
+   assertions and optimize accordingly, but not check them.  */
+
+extern int flag_enforce_eh_specs;
+
+/* Nonzero (the default) means to generate thread-safe code for
+   initializing local statics.  */
+
+extern int flag_threadsafe_statics;
+
+/* Nonzero means warn about implicit declarations.  */
+
+extern int warn_implicit;
+
+/* Warn about using __null (as NULL in C++) as sentinel.  For code compiled
+   with GCC this doesn't matter as __null is guaranteed to have the right
+   size.  */
+
+extern int warn_strict_null_sentinel;
+
+/* Maximum template instantiation depth.  This limit is rather
+   arbitrary, but it exists to limit the time it takes to notice
+   infinite template instantiations.  */
+
+extern int max_tinst_depth;
+
+/* Nonzero means the expression being parsed will never be evaluated.
+   This is a count, since unevaluated expressions can nest.  */
+
+extern int skip_evaluation;
+
+/* C types are partitioned into three subsets: object, function, and
+   incomplete types.  */
+#define C_TYPE_OBJECT_P(type) \
+  (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
+
+#define C_TYPE_INCOMPLETE_P(type) \
+  (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
+
+#define C_TYPE_FUNCTION_P(type) \
+  (TREE_CODE (type) == FUNCTION_TYPE)
+
+/* For convenience we define a single macro to identify the class of
+   object or incomplete types.  */
+#define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
+  (!C_TYPE_FUNCTION_P (type))
+
+/* Attribute table common to the C front ends.  */
+extern const struct attribute_spec c_common_attribute_table[];
+extern const struct attribute_spec c_common_format_attribute_table[];
+
+/* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
+   ID is the identifier to use, NAME is the string.
+   TYPE_DEP indicates whether it depends on type of the function or not
+   (i.e. __PRETTY_FUNCTION__).  */
+
+extern tree (*make_fname_decl) (tree, int);
+
+extern tree identifier_global_value (tree);
+extern void record_builtin_type (enum rid, const char *, tree);
+extern tree build_void_list_node (void);
+extern void start_fname_decls (void);
+extern void finish_fname_decls (void);
+extern const char *fname_as_string (int);
+extern tree fname_decl (location_t, unsigned, tree);
+
+extern void check_function_arguments (tree, int, tree *, tree);
+extern void check_function_arguments_recurse (void (*)
+					      (void *, tree,
+					       unsigned HOST_WIDE_INT),
+					      void *, tree,
+					      unsigned HOST_WIDE_INT);
+extern bool check_builtin_function_arguments (tree, int, tree *);
+extern void check_function_format (tree, int, tree *);
+extern void set_Wformat (int);
+extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
+extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
+extern int c_common_handle_option (size_t code, const char *arg, int value);
+extern bool c_common_missing_argument (const char *opt, size_t code);
+extern tree c_common_type_for_mode (enum machine_mode, int);
+extern tree c_common_type_for_size (unsigned int, int);
+extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
+						int, int);
+extern tree c_common_unsigned_type (tree);
+extern tree c_common_signed_type (tree);
+extern tree c_common_signed_or_unsigned_type (int, tree);
+extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
+extern bool decl_with_nonnull_addr_p (const_tree);
+extern tree c_common_truthvalue_conversion (location_t, tree);
+extern void c_apply_type_quals_to_decl (int, tree);
+extern tree c_sizeof_or_alignof_type (tree, bool, int);
+extern tree c_alignof_expr (tree);
+/* Print an error message for invalid operands to arith operation CODE.
+   NOP_EXPR is used as a special case (see truthvalue_conversion).  */
+extern void binary_op_error (location_t, enum tree_code, tree, tree);
+extern tree fix_string_type (tree);
+struct varray_head_tag;
+extern void constant_expression_warning (tree);
+extern void constant_expression_error (tree);
+extern bool strict_aliasing_warning (tree, tree, tree);
+extern void warnings_for_convert_and_check (tree, tree, tree);
+extern tree convert_and_check (tree, tree);
+extern void overflow_warning (tree);
+extern void warn_logical_operator (enum tree_code, tree, tree);
+extern void check_main_parameter_types (tree decl);
+extern bool c_determine_visibility (tree);
+extern bool same_scalar_type_ignoring_signedness (tree, tree);
+
+#define c_sizeof(T)  c_sizeof_or_alignof_type (T, true, 1)
+#define c_alignof(T) c_sizeof_or_alignof_type (T, false, 1)
+
+/* Subroutine of build_binary_op, used for certain operations.  */
+extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise);
+
+/* Subroutine of build_binary_op, used for comparison operations.
+   See if the operands have both been converted from subword integer types
+   and, if so, perhaps change them both back to their original type.  */
+extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
+
+extern tree pointer_int_sum (enum tree_code, tree, tree);
+
+/* Add qualifiers to a type, in the fashion for C.  */
+extern tree c_build_qualified_type (tree, int);
+
+/* Build tree nodes and builtin functions common to both C and C++ language
+   frontends.  */
+extern void c_common_nodes_and_builtins (void);
+
+extern void set_builtin_user_assembler_name (tree decl, const char *asmspec);
+
+extern void disable_builtin_function (const char *);
+
+extern void set_compound_literal_name (tree decl);
+
+extern tree build_va_arg (tree, tree);
+
+extern unsigned int c_common_init_options (unsigned int, const char **);
+extern bool c_common_post_options (const char **);
+extern bool c_common_init (void);
+extern void c_common_finish (void);
+extern void c_common_parse_file (int);
+extern alias_set_type c_common_get_alias_set (tree);
+extern void c_register_builtin_type (tree, const char*);
+extern bool c_promoting_integer_type_p (const_tree);
+extern int self_promoting_args_p (const_tree);
+extern tree strip_pointer_operator (tree);
+extern tree strip_pointer_or_array_types (tree);
+extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
+
+/* This is the basic parsing function.  */
+extern void c_parse_file (void);
+/* This is misnamed, it actually performs end-of-compilation processing.  */
+extern void finish_file	(void);
+
+
+/* These macros provide convenient access to the various _STMT nodes.  */
+
+/* Nonzero if a given STATEMENT_LIST represents the outermost binding
+   if a statement expression.  */
+#define STATEMENT_LIST_STMT_EXPR(NODE) \
+  TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
+
+/* Nonzero if a label has been added to the statement list.  */
+#define STATEMENT_LIST_HAS_LABEL(NODE) \
+  TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
+
+/* COMPOUND_LITERAL_EXPR accessors.  */
+#define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE)		\
+  TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
+#define COMPOUND_LITERAL_EXPR_DECL(NODE)			\
+  DECL_EXPR_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
+
+/* In a FIELD_DECL, nonzero if the decl was originally a bitfield.  */
+#define DECL_C_BIT_FIELD(NODE) \
+  (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
+#define SET_DECL_C_BIT_FIELD(NODE) \
+  (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
+#define CLEAR_DECL_C_BIT_FIELD(NODE) \
+  (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
+
+extern void emit_local_var (tree);
+extern tree do_case (tree, tree);
+extern tree build_stmt (enum tree_code, ...);
+extern tree build_case_label (tree, tree, tree);
+
+/* These functions must be defined by each front-end which implements
+   a variant of the C language.  They are used in c-common.c.  */
+
+extern tree build_unary_op (location_t, enum tree_code, tree, int);
+extern tree build_binary_op (location_t, enum tree_code, tree, tree, int);
+extern tree perform_integral_promotions (tree);
+
+/* These functions must be defined by each front-end which implements
+   a variant of the C language.  They are used by port files.  */
+
+extern tree default_conversion (tree);
+
+/* Given two integer or real types, return the type for their sum.
+   Given two compatible ANSI C types, returns the merged type.  */
+
+extern tree common_type (tree, tree);
+
+extern tree decl_constant_value (tree);
+
+/* Handle increment and decrement of boolean types.  */
+extern tree boolean_increment (enum tree_code, tree);
+
+extern int case_compare (splay_tree_key, splay_tree_key);
+
+extern tree c_add_case_label (splay_tree, tree, tree, tree, tree);
+
+extern void c_do_switch_warnings (splay_tree, location_t, tree, tree);
+
+extern tree build_function_call (tree, tree);
+
+extern tree resolve_overloaded_builtin (tree, tree);
+
+extern tree finish_label_address_expr (tree, location_t);
+
+/* Same function prototype, but the C and C++ front ends have
+   different implementations.  Used in c-common.c.  */
+extern tree lookup_label (tree);
+extern tree lookup_name (tree);
+
+extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
+extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
+
+extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
+
+extern tree c_staticp (tree);
+
+extern void init_c_lex (void);
+
+extern void c_cpp_builtins (cpp_reader *);
+extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
+
+/* Positive if an implicit `extern "C"' scope has just been entered;
+   negative if such a scope has just been exited.  */
+extern GTY(()) int pending_lang_change;
+
+/* Information recorded about each file examined during compilation.  */
+
+struct c_fileinfo
+{
+  int time;	/* Time spent in the file.  */
+
+  /* Flags used only by C++.
+     INTERFACE_ONLY nonzero means that we are in an "interface" section
+     of the compiler.  INTERFACE_UNKNOWN nonzero means we cannot trust
+     the value of INTERFACE_ONLY.  If INTERFACE_UNKNOWN is zero and
+     INTERFACE_ONLY is zero, it means that we are responsible for
+     exporting definitions that others might need.  */
+  short interface_only;
+  short interface_unknown;
+};
+
+struct c_fileinfo *get_fileinfo (const char *);
+extern void dump_time_statistics (void);
+
+extern bool c_dump_tree (void *, tree);
+
+extern void c_warn_unused_result (gimple_seq);
+
+extern void verify_sequence_points (tree);
+
+extern tree fold_offsetof (tree, tree);
+
+/* Places where an lvalue, or modifiable lvalue, may be required.
+   Used to select diagnostic messages in lvalue_error and
+   readonly_error.  */
+enum lvalue_use {
+  lv_assign,
+  lv_increment,
+  lv_decrement,
+  lv_addressof,
+  lv_asm
+};
+
+extern void lvalue_error (enum lvalue_use);
+
+extern int complete_array_type (tree *, tree, bool);
+
+extern tree builtin_type_for_size (int, bool);
+
+extern void warn_array_subscript_with_type_char (tree);
+extern void warn_about_parentheses (enum tree_code,
+				    enum tree_code, tree,
+				    enum tree_code, tree);
+extern void warn_for_unused_label (tree label);
+extern void warn_for_div_by_zero (location_t, tree divisor);
+extern void warn_for_sign_compare (location_t,
+				   tree orig_op0, tree orig_op1, 
+				   tree op0, tree op1, 
+				   tree result_type, 
+				   enum tree_code resultcode);
+
+/* In c-gimplify.c  */
+extern void c_genericize (tree);
+extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
+extern tree c_build_bind_expr (tree, tree);
+
+/* In c-pch.c  */
+extern void pch_init (void);
+extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
+extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
+			       const char *orig);
+extern void c_common_write_pch (void);
+extern void c_common_no_more_pch (void);
+extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
+extern void c_common_print_pch_checksum (FILE *f);
+
+/* In *-checksum.c */
+extern const unsigned char executable_checksum[16];
+
+/* In c-cppbuiltin.c  */
+extern void builtin_define_std (const char *macro);
+extern void builtin_define_with_value (const char *, const char *, int);
+extern void c_stddef_cpp_builtins (void);
+extern void fe_file_change (const struct line_map *);
+extern void c_parse_error (const char *, enum cpp_ttype, tree);
+
+/* Objective-C / Objective-C++ entry points.  */
+
+/* The following ObjC/ObjC++ functions are called by the C and/or C++
+   front-ends; they all must have corresponding stubs in stub-objc.c.  */
+extern tree objc_is_class_name (tree);
+extern tree objc_is_object_ptr (tree);
+extern void objc_check_decl (tree);
+extern int objc_is_reserved_word (tree);
+extern bool objc_compare_types (tree, tree, int, tree);
+extern void objc_volatilize_decl (tree);
+extern bool objc_type_quals_match (tree, tree);
+extern tree objc_rewrite_function_call (tree, tree);
+extern tree objc_message_selector (void);
+extern tree objc_lookup_ivar (tree, tree);
+extern void objc_clear_super_receiver (void);
+extern int objc_is_public (tree, tree);
+extern tree objc_is_id (tree);
+extern void objc_declare_alias (tree, tree);
+extern void objc_declare_class (tree);
+extern void objc_declare_protocols (tree);
+extern tree objc_build_message_expr (tree);
+extern tree objc_finish_message_expr (tree, tree, tree);
+extern tree objc_build_selector_expr (tree);
+extern tree objc_build_protocol_expr (tree);
+extern tree objc_build_encode_expr (tree);
+extern tree objc_build_string_object (tree);
+extern tree objc_get_protocol_qualified_type (tree, tree);
+extern tree objc_get_class_reference (tree);
+extern tree objc_get_class_ivars (tree);
+extern void objc_start_class_interface (tree, tree, tree);
+extern void objc_start_category_interface (tree, tree, tree);
+extern void objc_start_protocol (tree, tree);
+extern void objc_continue_interface (void);
+extern void objc_finish_interface (void);
+extern void objc_start_class_implementation (tree, tree);
+extern void objc_start_category_implementation (tree, tree);
+extern void objc_continue_implementation (void);
+extern void objc_finish_implementation (void);
+extern void objc_set_visibility (int);
+extern void objc_set_method_type (enum tree_code);
+extern tree objc_build_method_signature (tree, tree, tree, bool);
+extern void objc_add_method_declaration (tree);
+extern void objc_start_method_definition (tree);
+extern void objc_finish_method_definition (tree);
+extern void objc_add_instance_variable (tree);
+extern tree objc_build_keyword_decl (tree, tree, tree);
+extern tree objc_build_throw_stmt (tree);
+extern void objc_begin_try_stmt (location_t, tree);
+extern tree objc_finish_try_stmt (void);
+extern void objc_begin_catch_clause (tree);
+extern void objc_finish_catch_clause (void);
+extern void objc_build_finally_clause (location_t, tree);
+extern tree objc_build_synchronized (location_t, tree, tree);
+extern int objc_static_init_needed_p (void);
+extern tree objc_generate_static_init_call (tree);
+extern tree objc_generate_write_barrier (tree, enum tree_code, tree);
+
+/* The following are provided by the C and C++ front-ends, and called by
+   ObjC/ObjC++.  */
+extern void *objc_get_current_scope (void);
+extern void objc_mark_locals_volatile (void *);
+
+/* In c-ppoutput.c  */
+extern void init_pp_output (FILE *);
+extern void preprocess_file (cpp_reader *);
+extern void pp_file_change (const struct line_map *);
+extern void pp_dir_change (cpp_reader *, const char *);
+extern bool check_missing_format_attribute (tree, tree);
+
+/* In c-omp.c  */
+extern tree c_finish_omp_master (tree);
+extern tree c_finish_omp_critical (tree, tree);
+extern tree c_finish_omp_ordered (tree);
+extern void c_finish_omp_barrier (void);
+extern tree c_finish_omp_atomic (enum tree_code, tree, tree);
+extern void c_finish_omp_flush (void);
+extern void c_finish_omp_taskwait (void);
+extern tree c_finish_omp_for (location_t, tree, tree, tree, tree, tree, tree);
+extern void c_split_parallel_clauses (tree, tree *, tree *);
+extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
+
+/* Not in c-omp.c; provided by the front end.  */
+extern bool c_omp_sharing_predetermined (tree);
+extern tree c_omp_remap_decl (tree, bool);
+
+/* In order for the format checking to accept the C frontend
+   diagnostic framework extensions, you must include this file before
+   toplev.h, not after.  The C front end formats are a subset of those
+   for C++, so they are the appropriate set to use in common code;
+   cp-tree.h overrides this for C++.  */
+#ifndef GCC_DIAG_STYLE
+#define GCC_DIAG_STYLE __gcc_cdiag__
+#endif
+
+#endif /* ! GCC_C_COMMON_H */