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 #include "output.h"
  30
  31 /* Each of the functions defined here
  32    is an alternative to a function in objc-actions.c.  */
  33
  34 int
  35 lang_decode_option (argc, argv)
  36      int argc;
  37      char **argv;
  38 {
  39   return c_decode_option (argc, argv);
  40 }
  41
  42 void
  43 lang_init_options ()
  44 {
  45 }
  46
  47 void
  48 lang_init ()
  49 {
  50 #if !USE_CPPLIB
  51   /* the beginning of the file is a new line; check for # */
  52   /* With luck, we discover the real source file's name from that
  53      and put it in input_filename.  */
  54   ungetc (check_newline (), finput);
  55 #endif
  56 }
  57
  58 void
  59 lang_finish ()
  60 {
  61 }
  62
  63 char *
  64 lang_identify ()
  65 {
  66   return "c";
  67 }
  68
  69 void
  70 print_lang_statistics ()
  71 {
  72 }
  73
  74 /* used by print-tree.c */
  75
  76 void
  77 lang_print_xnode (file, node, indent)
  78      FILE *file ATTRIBUTE_UNUSED;
  79      tree node ATTRIBUTE_UNUSED;
  80      int indent ATTRIBUTE_UNUSED;
  81 {
  82 }
  83
  84 /* Used by c-lex.c, but only for objc.  */
  85
  86 tree
  87 lookup_interface (arg)
  88      tree arg ATTRIBUTE_UNUSED;
  89 {
  90   return 0;
  91 }
  92
  93 tree
  94 is_class_name (arg)
  95     tree arg ATTRIBUTE_UNUSED;
  96 {
  97   return 0;
  98 }
  99
 100 void
 101 maybe_objc_check_decl (decl)
 102      tree decl ATTRIBUTE_UNUSED;
 103 {
 104 }
 105
 106 int
 107 maybe_objc_comptypes (lhs, rhs, reflexive)
 108      tree lhs ATTRIBUTE_UNUSED;
 109      tree rhs ATTRIBUTE_UNUSED;
 110      int reflexive ATTRIBUTE_UNUSED;
 111 {
 112   return -1;
 113 }
 114
 115 tree
 116 maybe_objc_method_name (decl)
 117     tree decl ATTRIBUTE_UNUSED;
 118 {
 119   return 0;
 120 }
 121
 122 tree
 123 maybe_building_objc_message_expr ()
 124 {
 125   return 0;
 126 }
 127
 128 int
 129 recognize_objc_keyword ()
 130 {
 131   return 0;
 132 }
 133
 134 tree
 135 build_objc_string (len, str)
 136     int len ATTRIBUTE_UNUSED;
 137     char *str ATTRIBUTE_UNUSED;
 138 {
 139   abort ();
 140   return NULL_TREE;
 141 }
 142
 143 /* Called at end of parsing, but before end-of-file processing.  */
 144
 145 void
 146 finish_file ()
 147 {
 148 #ifndef ASM_OUTPUT_CONSTRUCTOR
 149   extern tree static_ctors;
 150 #endif
 151 #ifndef ASM_OUTPUT_DESTRUCTOR
 152   extern tree static_dtors;
 153 #endif
 154   extern tree build_function_call                 PROTO((tree, tree));
 155 #if !defined(ASM_OUTPUT_CONSTRUCTOR) || !defined(ASM_OUTPUT_DESTRUCTOR)
 156   tree void_list_node = build_tree_list (NULL_TREE, void_type_node);
 157 #endif
 158 #ifndef ASM_OUTPUT_CONSTRUCTOR
 159   if (static_ctors)
 160     {
 161       tree fnname = get_file_function_name ('I');
 162       start_function (void_list_node,
 163                       build_parse_node (CALL_EXPR, fnname, void_list_node,
 164                                         NULL_TREE),
 165                       NULL_TREE, NULL_TREE, 0);
 166       fnname = DECL_ASSEMBLER_NAME (current_function_decl);
 167       store_parm_decls ();
 168
 169       for (; static_ctors; static_ctors = TREE_CHAIN (static_ctors))
 170         expand_expr_stmt (build_function_call (TREE_VALUE (static_ctors),
 171                                                NULL_TREE));
 172
 173       finish_function (0);
 174
 175       assemble_constructor (IDENTIFIER_POINTER (fnname));
 176     }
 177 #endif
 178 #ifndef ASM_OUTPUT_DESTRUCTOR
 179   if (static_dtors)
 180     {
 181       tree fnname = get_file_function_name ('D');
 182       start_function (void_list_node,
 183                       build_parse_node (CALL_EXPR, fnname, void_list_node,
 184                                         NULL_TREE),
 185                       NULL_TREE, NULL_TREE, 0);
 186       fnname = DECL_ASSEMBLER_NAME (current_function_decl);
 187       store_parm_decls ();
 188
 189       for (; static_dtors; static_dtors = TREE_CHAIN (static_dtors))
 190         expand_expr_stmt (build_function_call (TREE_VALUE (static_dtors),
 191                                                NULL_TREE));
 192
 193       finish_function (0);
 194
 195       assemble_destructor (IDENTIFIER_POINTER (fnname));
 196     }
 197 #endif
 198 }