1: /* GCC core type declarations.
    2:    Copyright (C) 2002, 2004, 2007 Free Software Foundation, Inc.
    3: 
    4: This file is part of GCC.
    5: 
    6: GCC is free software; you can redistribute it and/or modify it under
    7: the terms of the GNU General Public License as published by the Free
    8: Software Foundation; either version 3, or (at your option) any later
    9: version.
   10: 
   11: GCC is distributed in the hope that it will be useful, but WITHOUT ANY
   12: WARRANTY; without even the implied warranty of MERCHANTABILITY or
   13: FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   14: for more details.
   15: 
   16: You should have received a copy of the GNU General Public License
   17: along with GCC; see the file COPYING3.  If not see
   18: <http://www.gnu.org/licenses/>.  */
   19: 
   20: /* Provide forward declarations of core types which are referred to by
   21:    most of the compiler.  This allows header files to use these types
   22:    (e.g. in function prototypes) without concern for whether the full
   23:    definitions are visible.  Some other declarations that need to be
   24:    universally visible are here, too.
   25: 
   26:    In the context of tconfig.h, most of these have special definitions
   27:    which prevent them from being used except in further type
   28:    declarations.  This is a kludge; the right thing is to avoid
   29:    including the "tm.h" header set in the context of tconfig.h, but
   30:    we're not there yet.  */
   31: 
   32: #ifndef GCC_CORETYPES_H
   33: #define GCC_CORETYPES_H
   34: 
   35: #define GTY(x)  /* nothing - marker for gengtype */


ueno: gcc/4.2.2/gcc/coretypes.h:35-35 on Sat Jan 12 13:43:48 +0900 2008


すみません、login のはバグっぽいです。直したつもり…。



guest: gcc/4.2.2/gcc/coretypes.h:35-35 on Sat Jan 12 00:54:10 +0900 2008


これがどのように働くかを調べたり、理解するのはちょっと大変そう。gccint の 19 章か 20 章に説明があるらしいけれど。
(一度 guest で書いたのですが login してから消せたので、書直しました。と思ったがまだ login 出来ていなかったか ?


   36: 
   37: #ifndef USED_FOR_TARGET
   38: 
   39: struct bitmap_head_def;
   40: typedef struct bitmap_head_def *bitmap;
   41: struct rtx_def;
   42: typedef struct rtx_def *rtx;
   43: struct rtvec_def;
   44: typedef struct rtvec_def *rtvec;
   45: union tree_node;
   46: typedef union tree_node *tree;
   47: union section;
   48: typedef union section section;
   49: 
   50: /* Provide forward struct declaration so that we don't have to include
   51:    all of cpplib.h whenever a random prototype includes a pointer.
   52:    Note that the cpp_reader typedef remains part of cpplib.h.  */
   53: 
   54: struct cpp_reader;
   55: 
   56: /* The thread-local storage model associated with a given VAR_DECL
   57:    or SYMBOL_REF.  This isn't used much, but both trees and RTL refer
   58:    to it, so it's here.  */
   59: enum tls_model {
   60:   TLS_MODEL_NONE,
   61:   TLS_MODEL_GLOBAL_DYNAMIC,
   62:   TLS_MODEL_LOCAL_DYNAMIC,
   63:   TLS_MODEL_INITIAL_EXEC,
   64:   TLS_MODEL_LOCAL_EXEC
   65: };
   66: 
   67: #else
   68: 
   69: struct _dont_use_rtx_here_;
   70: struct _dont_use_rtvec_here_;
   71: union _dont_use_tree_here_;
   72: #define rtx struct _dont_use_rtx_here_ *
   73: #define rtvec struct _dont_use_rtvec_here *
   74: #define tree union _dont_use_tree_here_ *
   75: 
   76: #endif
   77: 
   78: #endif /* coretypes.h */
   79: