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 (argc, argv)
  35      int argc;
  36      char **argv;
  37 {
  38   return c_decode_option (argc, argv);
  39 }
  40
  41 void
  42 lang_init_options ()
  43 {
  44 }
  45
  46 void
  47 lang_init ()
  48 {
  49 #if !USE_CPPLIB
  50   /* the beginning of the file is a new line; check for # */
  51   /* With luck, we discover the real source file's name from that
  52      and put it in input_filename.  */
  53   ungetc (check_newline (), finput);
  54 #endif
  55 }
  56
  57 void
  58 lang_finish ()
  59 {
  60 }
  61
  62 char *
  63 lang_identify ()
  64 {
  65   return "c";
  66 }
  67
  68 void
  69 print_lang_statistics ()
  70 {
  71 }
  72
  73 /* used by print-tree.c */
  74
  75 void
  76 lang_print_xnode (file, node, indent)
  77      FILE *file ATTRIBUTE_UNUSED;
  78      tree node ATTRIBUTE_UNUSED;
  79      int indent ATTRIBUTE_UNUSED;
  80 {
  81 }
  82
  83 /* Used by c-lex.c, but only for objc.  */
  84
  85 tree
  86 lookup_interface (arg)
  87      tree arg ATTRIBUTE_UNUSED;
  88 {
  89   return 0;
  90 }
  91
  92 tree
  93 is_class_name (arg)
  94     tree arg ATTRIBUTE_UNUSED;
  95 {
  96   return 0;
  97 }
  98
  99 void
 100 maybe_objc_check_decl (decl)
 101      tree decl ATTRIBUTE_UNUSED;
 102 {
 103 }
 104
 105 int
 106 maybe_objc_comptypes (lhs, rhs, reflexive)
 107      tree lhs ATTRIBUTE_UNUSED;
 108      tree rhs ATTRIBUTE_UNUSED;
 109      int reflexive ATTRIBUTE_UNUSED;
 110 {
 111   return -1;
 112 }
 113
 114 tree
 115 maybe_objc_method_name (decl)
 116     tree decl ATTRIBUTE_UNUSED;
 117 {
 118   return 0;
 119 }
 120
 121 tree
 122 maybe_building_objc_message_expr ()
 123 {
 124   return 0;
 125 }
 126
 127 int
 128 recognize_objc_keyword ()
 129 {
 130   return 0;
 131 }
 132
 133 tree
 134 build_objc_string (len, str)
 135     int len ATTRIBUTE_UNUSED;
 136     char *str ATTRIBUTE_UNUSED;
 137 {
 138   abort ();
 139   return NULL_TREE;
 140 }
 141
 142 void
 143 GNU_xref_begin ()
 144 {
 145   fatal ("GCC does not yet support XREF");
 146 }
 147
 148 void
 149 GNU_xref_end ()
 150 {
 151   fatal ("GCC does not yet support XREF");
 152 }
 153
 154 /* Called at end of parsing, but before end-of-file processing.  */
 155
 156 void
 157 finish_file ()
 158 {
 159 #ifndef ASM_OUTPUT_CONSTRUCTOR
 160   extern tree static_ctors;
 161 #endif
 162 #ifndef ASM_OUTPUT_DESTRUCTOR
 163   extern tree static_dtors;
 164 #endif
 165   extern tree build_function_call                 PROTO((tree, tree));
 166 #if !defined(ASM_OUTPUT_CONSTRUCTOR) || !defined(ASM_OUTPUT_DESTRUCTOR)
 167   tree void_list_node = build_tree_list (NULL_TREE, void_type_node);
 168 #endif
 169 #ifndef ASM_OUTPUT_CONSTRUCTOR
 170   if (static_ctors)
 171     {
 172       tree fnname = get_file_function_name ('I');
 173       start_function (void_list_node,
 174                       build_parse_node (CALL_EXPR, fnname, void_list_node,
 175                                         NULL_TREE),
 176                       NULL_TREE, NULL_TREE, 0);
 177       fnname = DECL_ASSEMBLER_NAME (current_function_decl);
 178       store_parm_decls ();
 179
 180       for (; static_ctors; static_ctors = TREE_CHAIN (static_ctors))
 181         expand_expr_stmt (build_function_call (TREE_VALUE (static_ctors),
 182                                                NULL_TREE));
 183
 184       finish_function (0);
 185
 186       assemble_constructor (IDENTIFIER_POINTER (fnname));
 187     }
 188 #endif
 189 #ifndef ASM_OUTPUT_DESTRUCTOR
 190   if (static_dtors)
 191     {
 192       tree fnname = get_file_function_name ('D');
 193       start_function (void_list_node,
 194                       build_parse_node (CALL_EXPR, fnname, void_list_node,
 195                                         NULL_TREE),
 196                       NULL_TREE, NULL_TREE, 0);
 197       fnname = DECL_ASSEMBLER_NAME (current_function_decl);
 198       store_parm_decls ();
 199
 200       for (; static_dtors; static_dtors = TREE_CHAIN (static_dtors))
 201         expand_expr_stmt (build_function_call (TREE_VALUE (static_dtors),
 202                                                NULL_TREE));
 203
 204       finish_function (0);
 205
 206       assemble_destructor (IDENTIFIER_POINTER (fnname));
 207     }
 208 #endif
 209 }