gcc/c-lang.c

   1 /* Language-specific hook definitions for C front end.
   2    Copyright (C) 1991, 1995, 1997, 1998 Free Software Foundation, Inc.
   3
   4 This file is part of GNU CC.
   5
   6 GNU CC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU CC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU CC; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21
  22 #include "config.h"
  23 #include "system.h"
  24 #include "tree.h"
  25 #include "input.h"
  26 #include "c-tree.h"
  27 #include "c-lex.h"
  28 #include "toplev.h"
  29
  30 /* Each of the functions defined here
  31    is an alternative to a function in objc-actions.c.  */
  32
  33 int
  34 lang_decode_option (p)
  35      char *p;
  36 {
  37   return c_decode_option (p);
  38 }
  39
  40 void
  41 lang_init ()
  42 {
  43 #if !USE_CPPLIB
  44   /* the beginning of the file is a new line; check for # */
  45   /* With luck, we discover the real source file's name from that
  46      and put it in input_filename.  */
  47   ungetc (check_newline (), finput);
  48 #endif
  49 }
  50
  51 void
  52 lang_finish ()
  53 {
  54 }
  55
  56 char *
  57 lang_identify ()
  58 {
  59   return "c";
  60 }
  61
  62 void
  63 print_lang_statistics ()
  64 {
  65 }
  66
  67 /* used by print-tree.c */
  68
  69 void
  70 lang_print_xnode (file, node, indent)
  71      FILE *file ATTRIBUTE_UNUSED;
  72      tree node ATTRIBUTE_UNUSED;
  73      int indent ATTRIBUTE_UNUSED;
  74 {
  75 }
  76
  77 /* Used by c-lex.c, but only for objc.  */
  78
  79 tree
  80 lookup_interface (arg)
  81      tree arg ATTRIBUTE_UNUSED;
  82 {
  83   return 0;
  84 }
  85
  86 tree
  87 is_class_name (arg)
  88     tree arg ATTRIBUTE_UNUSED;
  89 {
  90   return 0;
  91 }
  92
  93 void
  94 maybe_objc_check_decl (decl)
  95      tree decl ATTRIBUTE_UNUSED;
  96 {
  97 }
  98
  99 int
 100 maybe_objc_comptypes (lhs, rhs, reflexive)
 101      tree lhs ATTRIBUTE_UNUSED;
 102      tree rhs ATTRIBUTE_UNUSED;
 103      int reflexive ATTRIBUTE_UNUSED;
 104 {
 105   return -1;
 106 }
 107
 108 tree
 109 maybe_objc_method_name (decl)
 110     tree decl ATTRIBUTE_UNUSED;
 111 {
 112   return 0;
 113 }
 114
 115 tree
 116 maybe_building_objc_message_expr ()
 117 {
 118   return 0;
 119 }
 120
 121 int
 122 recognize_objc_keyword ()
 123 {
 124   return 0;
 125 }
 126
 127 tree
 128 build_objc_string (len, str)
 129     int len ATTRIBUTE_UNUSED;
 130     char *str ATTRIBUTE_UNUSED;
 131 {
 132   abort ();
 133   return NULL_TREE;
 134 }
 135
 136 void
 137 GNU_xref_begin ()
 138 {
 139   fatal ("GCC does not yet support XREF");
 140 }
 141
 142 void
 143 GNU_xref_end ()
 144 {
 145   fatal ("GCC does not yet support XREF");
 146 }
 147
 148 /* Called at end of parsing, but before end-of-file processing.  */
 149
 150 void
 151 finish_file ()
 152 {
 153 #ifndef ASM_OUTPUT_CONSTRUCTOR
 154   extern tree static_ctors;
 155 #endif
 156 #ifndef ASM_OUTPUT_DESTRUCTOR
 157   extern tree static_dtors;
 158 #endif
 159   extern tree build_function_call                 PROTO((tree, tree));
 160 #if !defined(ASM_OUTPUT_CONSTRUCTOR) || !defined(ASM_OUTPUT_DESTRUCTOR)
 161   tree void_list_node = build_tree_list (NULL_TREE, void_type_node);
 162 #endif
 163 #ifndef ASM_OUTPUT_CONSTRUCTOR
 164   if (static_ctors)
 165     {
 166       tree fnname = get_file_function_name ('I');
 167       start_function (void_list_node,
 168                       build_parse_node (CALL_EXPR, fnname, void_list_node,
 169                                         NULL_TREE),
 170                       NULL_TREE, NULL_TREE, 0);
 171       fnname = DECL_ASSEMBLER_NAME (current_function_decl);
 172       store_parm_decls ();
 173
 174       for (; static_ctors; static_ctors = TREE_CHAIN (static_ctors))
 175         expand_expr_stmt (build_function_call (TREE_VALUE (static_ctors),
 176                                                NULL_TREE));
 177
 178       finish_function (0);
 179
 180       assemble_constructor (IDENTIFIER_POINTER (fnname));
 181     }
 182 #endif
 183 #ifndef ASM_OUTPUT_DESTRUCTOR
 184   if (static_dtors)
 185     {
 186       tree fnname = get_file_function_name ('D');
 187       start_function (void_list_node,
 188                       build_parse_node (CALL_EXPR, fnname, void_list_node,
 189                                         NULL_TREE),
 190                       NULL_TREE, NULL_TREE, 0);
 191       fnname = DECL_ASSEMBLER_NAME (current_function_decl);
 192       store_parm_decls ();
 193
 194       for (; static_dtors; static_dtors = TREE_CHAIN (static_dtors))
 195         expand_expr_stmt (build_function_call (TREE_VALUE (static_dtors),
 196                                                NULL_TREE));
 197
 198       finish_function (0);
 199
 200       assemble_destructor (IDENTIFIER_POINTER (fnname));
 201     }
 202 #endif
 203 }