gcc/c-family/c-ppoutput.c

   1 /* Preprocess only, using cpplib.
   2    Copyright (C) 1995-2015 Free Software Foundation, Inc.
   3    Written by Per Bothner, 1994-95.
   4
   5    This program is free software; you can redistribute it and/or modify it
   6    under the terms of the GNU General Public License as published by the
   7    Free Software Foundation; either version 3, or (at your option) any
   8    later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; see the file COPYING3.  If not see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include "config.h"
  20 #include "system.h"
  21 #include "coretypes.h"
  22 #include "cpplib.h"
  23 #include "../libcpp/internal.h"
  24 #include "hash-set.h"
  25 #include "machmode.h"
  26 #include "vec.h"
  27 #include "double-int.h"
  28 #include "input.h"
  29 #include "alias.h"
  30 #include "symtab.h"
  31 #include "options.h"
  32 #include "wide-int.h"
  33 #include "inchash.h"
  34 #include "tree.h"
  35 #include "c-common.h"           /* For flags.  */
  36 #include "c-pragma.h"           /* For parse_in.  */
  37
  38 /* Encapsulates state used to convert a stream of tokens into a text
  39    file.  */
  40 static struct
  41 {
  42   FILE *outf;                   /* Stream to write to.  */
  43   const cpp_token *prev;        /* Previous token.  */
  44   const cpp_token *source;      /* Source token for spacing.  */
  45   int src_line;                 /* Line number currently being written.  */
  46   unsigned char printed;        /* Nonzero if something output at line.  */
  47   bool first_time;              /* pp_file_change hasn't been called yet.  */
  48   const char *src_file;         /* Current source file.  */
  49   bool prev_was_system_token;   /* True if the previous token was a
  50                                    system token.*/
  51 } print;
  52
  53 /* Defined and undefined macros being queued for output with -dU at
  54    the next newline.  */
  55 typedef struct macro_queue
  56 {
  57   struct macro_queue *next;     /* Next macro in the list.  */
  58   char *macro;                  /* The name of the macro if not
  59                                    defined, the full definition if
  60                                    defined.  */
  61 } macro_queue;
  62 static macro_queue *define_queue, *undef_queue;
  63
  64 /* General output routines.  */
  65 static void scan_translation_unit (cpp_reader *);
  66 static void print_lines_directives_only (int, const void *, size_t);
  67 static void scan_translation_unit_directives_only (cpp_reader *);
  68 static void scan_translation_unit_trad (cpp_reader *);
  69 static void account_for_newlines (const unsigned char *, size_t);
  70 static int dump_macro (cpp_reader *, cpp_hashnode *, void *);
  71 static void dump_queued_macros (cpp_reader *);
  72
  73 static bool print_line_1 (source_location, const char*, FILE *);
  74 static bool print_line (source_location, const char *);
  75 static bool maybe_print_line_1 (source_location, FILE *);
  76 static bool maybe_print_line (source_location);
  77 static bool do_line_change (cpp_reader *, const cpp_token *,
  78                             source_location, int);
  79
  80 /* Callback routines for the parser.   Most of these are active only
  81    in specific modes.  */
  82 static void cb_line_change (cpp_reader *, const cpp_token *, int);
  83 static void cb_define (cpp_reader *, source_location, cpp_hashnode *);
  84 static void cb_undef (cpp_reader *, source_location, cpp_hashnode *);
  85 static void cb_used_define (cpp_reader *, source_location, cpp_hashnode *);
  86 static void cb_used_undef (cpp_reader *, source_location, cpp_hashnode *);
  87 static void cb_include (cpp_reader *, source_location, const unsigned char *,
  88                         const char *, int, const cpp_token **);
  89 static void cb_ident (cpp_reader *, source_location, const cpp_string *);
  90 static void cb_def_pragma (cpp_reader *, source_location);
  91 static void cb_read_pch (cpp_reader *pfile, const char *name,
  92                          int fd, const char *orig_name);
  93
  94 /* Preprocess and output.  */
  95 void
  96 preprocess_file (cpp_reader *pfile)
  97 {
  98   /* A successful cpp_read_main_file guarantees that we can call
  99      cpp_scan_nooutput or cpp_get_token next.  */
 100   if (flag_no_output && pfile->buffer)
 101     {
 102       /* Scan -included buffers, then the main file.  */
 103       while (pfile->buffer->prev)
 104         cpp_scan_nooutput (pfile);
 105       cpp_scan_nooutput (pfile);
 106     }
 107   else if (cpp_get_options (pfile)->traditional)
 108     scan_translation_unit_trad (pfile);
 109   else if (cpp_get_options (pfile)->directives_only
 110            && !cpp_get_options (pfile)->preprocessed)
 111     scan_translation_unit_directives_only (pfile);
 112   else
 113     scan_translation_unit (pfile);
 114
 115   /* -dM command line option.  Should this be elsewhere?  */
 116   if (flag_dump_macros == 'M')
 117     cpp_forall_identifiers (pfile, dump_macro, NULL);
 118
 119   /* Flush any pending output.  */
 120   if (print.printed)
 121     putc ('\n', print.outf);
 122 }
 123
 124 /* Set up the callbacks as appropriate.  */
 125 void
 126 init_pp_output (FILE *out_stream)
 127 {
 128   cpp_callbacks *cb = cpp_get_callbacks (parse_in);
 129
 130   if (!flag_no_output)
 131     {
 132       cb->line_change = cb_line_change;
 133       /* Don't emit #pragma or #ident directives if we are processing
 134          assembly language; the assembler may choke on them.  */
 135       if (cpp_get_options (parse_in)->lang != CLK_ASM)
 136         {
 137           cb->ident      = cb_ident;
 138           cb->def_pragma = cb_def_pragma;
 139         }
 140     }
 141
 142   if (flag_dump_includes)
 143     cb->include  = cb_include;
 144
 145   if (flag_pch_preprocess)
 146     {
 147       cb->valid_pch = c_common_valid_pch;
 148       cb->read_pch = cb_read_pch;
 149     }
 150
 151   if (flag_dump_macros == 'N' || flag_dump_macros == 'D')
 152     {
 153       cb->define = cb_define;
 154       cb->undef  = cb_undef;
 155     }
 156
 157   if (flag_dump_macros == 'U')
 158     {
 159       cb->before_define = dump_queued_macros;
 160       cb->used_define = cb_used_define;
 161       cb->used_undef = cb_used_undef;
 162     }
 163
 164   cb->has_attribute = c_common_has_attribute;
 165
 166   /* Initialize the print structure.  */
 167   print.src_line = 1;
 168   print.printed = 0;
 169   print.prev = 0;
 170   print.outf = out_stream;
 171   print.first_time = 1;
 172   print.src_file = "";
 173   print.prev_was_system_token = false;
 174 }
 175
 176 /* Writes out the preprocessed file, handling spacing and paste
 177    avoidance issues.  */
 178 static void
 179 scan_translation_unit (cpp_reader *pfile)
 180 {
 181   bool avoid_paste = false;
 182   bool do_line_adjustments
 183     = cpp_get_options (parse_in)->lang != CLK_ASM
 184       && !flag_no_line_commands;
 185   bool in_pragma = false;
 186   bool line_marker_emitted = false;
 187
 188   print.source = NULL;
 189   for (;;)
 190     {
 191       source_location loc;
 192       const cpp_token *token = cpp_get_token_with_location (pfile, &loc);
 193
 194       if (token->type == CPP_PADDING)
 195         {
 196           avoid_paste = true;
 197           if (print.source == NULL
 198               || (!(print.source->flags & PREV_WHITE)
 199                   && token->val.source == NULL))
 200             print.source = token->val.source;
 201           continue;
 202         }
 203
 204       if (token->type == CPP_EOF)
 205         break;
 206
 207       /* Subtle logic to output a space if and only if necessary.  */
 208       if (avoid_paste)
 209         {
 210           int src_line = LOCATION_LINE (loc);
 211
 212           if (print.source == NULL)
 213             print.source = token;
 214
 215           if (src_line != print.src_line
 216               && do_line_adjustments
 217               && !in_pragma)
 218             {
 219               line_marker_emitted = do_line_change (pfile, token, loc, false);
 220               putc (' ', print.outf);
 221             }
 222           else if (print.source->flags & PREV_WHITE
 223                    || (print.prev
 224                        && cpp_avoid_paste (pfile, print.prev, token))
 225                    || (print.prev == NULL && token->type == CPP_HASH))
 226             putc (' ', print.outf);
 227         }
 228       else if (token->flags & PREV_WHITE)
 229         {
 230           int src_line = LOCATION_LINE (loc);
 231
 232           if (src_line != print.src_line
 233               && do_line_adjustments
 234               && !in_pragma)
 235             line_marker_emitted = do_line_change (pfile, token, loc, false);
 236           putc (' ', print.outf);
 237         }
 238
 239       avoid_paste = false;
 240       print.source = NULL;
 241       print.prev = token;
 242       if (token->type == CPP_PRAGMA)
 243         {
 244           const char *space;
 245           const char *name;
 246
 247           line_marker_emitted = maybe_print_line (token->src_loc);
 248           fputs ("#pragma ", print.outf);
 249           c_pp_lookup_pragma (token->val.pragma, &space, &name);
 250           if (space)
 251             fprintf (print.outf, "%s %s", space, name);
 252           else
 253             fprintf (print.outf, "%s", name);
 254           print.printed = 1;
 255           in_pragma = true;
 256         }
 257       else if (token->type == CPP_PRAGMA_EOL)
 258         {
 259           maybe_print_line (token->src_loc);
 260           in_pragma = false;
 261         }
 262       else
 263         {
 264           if (cpp_get_options (parse_in)->debug)
 265               linemap_dump_location (line_table, token->src_loc,
 266                                      print.outf);
 267
 268           if (do_line_adjustments
 269               && !in_pragma
 270               && !line_marker_emitted
 271               && print.prev_was_system_token != !!in_system_header_at(loc)
 272               && !is_location_from_builtin_token (loc))
 273             /* The system-ness of this token is different from the one
 274                of the previous token.  Let's emit a line change to
 275                mark the new system-ness before we emit the token.  */
 276             {
 277               do_line_change (pfile, token, loc, false);
 278               print.prev_was_system_token = !!in_system_header_at(loc);
 279             }
 280           cpp_output_token (token, print.outf);
 281           line_marker_emitted = false;
 282         }
 283
 284       /* CPP_COMMENT tokens and raw-string literal tokens can
 285          have embedded new-line characters.  Rather than enumerating
 286          all the possible token types just check if token uses
 287          val.str union member.  */
 288       if (cpp_token_val_index (token) == CPP_TOKEN_FLD_STR)
 289         account_for_newlines (token->val.str.text, token->val.str.len);
 290     }
 291 }
 292
 293 static void
 294 print_lines_directives_only (int lines, const void *buf, size_t size)
 295 {
 296   print.src_line += lines;
 297   fwrite (buf, 1, size, print.outf);
 298 }
 299
 300 /* Writes out the preprocessed file, handling spacing and paste
 301    avoidance issues.  */
 302 static void
 303 scan_translation_unit_directives_only (cpp_reader *pfile)
 304 {
 305   struct _cpp_dir_only_callbacks cb;
 306
 307   cb.print_lines = print_lines_directives_only;
 308   cb.maybe_print_line = (void (*) (source_location)) maybe_print_line;
 309
 310   _cpp_preprocess_dir_only (pfile, &cb);
 311 }
 312
 313 /* Adjust print.src_line for newlines embedded in output.  */
 314 static void
 315 account_for_newlines (const unsigned char *str, size_t len)
 316 {
 317   while (len--)
 318     if (*str++ == '\n')
 319       print.src_line++;
 320 }
 321
 322 /* Writes out a traditionally preprocessed file.  */
 323 static void
 324 scan_translation_unit_trad (cpp_reader *pfile)
 325 {
 326   while (_cpp_read_logical_line_trad (pfile))
 327     {
 328       size_t len = pfile->out.cur - pfile->out.base;
 329       maybe_print_line (pfile->out.first_line);
 330       fwrite (pfile->out.base, 1, len, print.outf);
 331       print.printed = 1;
 332       if (!CPP_OPTION (pfile, discard_comments))
 333         account_for_newlines (pfile->out.base, len);
 334     }
 335 }
 336
 337 /* If the token read on logical line LINE needs to be output on a
 338    different line to the current one, output the required newlines or
 339    a line marker.  If a line marker was emitted, return TRUE otherwise
 340    return FALSE.  */
 341
 342 static bool
 343 maybe_print_line_1 (source_location src_loc, FILE *stream)
 344 {
 345   bool emitted_line_marker = false;
 346   int src_line = LOCATION_LINE (src_loc);
 347   const char *src_file = LOCATION_FILE (src_loc);
 348
 349   /* End the previous line of text.  */
 350   if (print.printed)
 351     {
 352       putc ('\n', stream);
 353       print.src_line++;
 354       print.printed = 0;
 355     }
 356
 357   if (!flag_no_line_commands
 358       && src_line >= print.src_line
 359       && src_line < print.src_line + 8
 360       && strcmp (src_file, print.src_file) == 0)
 361     {
 362       while (src_line > print.src_line)
 363         {
 364           putc ('\n', stream);
 365           print.src_line++;
 366         }
 367     }
 368   else
 369     emitted_line_marker = print_line_1 (src_loc, "", stream);
 370
 371   return emitted_line_marker;
 372 }
 373
 374 /* If the token read on logical line LINE needs to be output on a
 375    different line to the current one, output the required newlines or
 376    a line marker.  If a line marker was emitted, return TRUE otherwise
 377    return FALSE.  */
 378
 379 static bool
 380 maybe_print_line (source_location src_loc)
 381 {
 382   if (cpp_get_options (parse_in)->debug)
 383     linemap_dump_location (line_table, src_loc,
 384                            print.outf);
 385   return maybe_print_line_1 (src_loc, print.outf);
 386 }
 387
 388 /* Output a line marker for logical line LINE.  Special flags are "1"
 389    or "2" indicating entering or leaving a file.  If the line marker
 390    was effectively emitted, return TRUE otherwise return FALSE.  */
 391
 392 static bool
 393 print_line_1 (source_location src_loc, const char *special_flags, FILE *stream)
 394 {
 395   bool emitted_line_marker = false;
 396
 397   /* End any previous line of text.  */
 398   if (print.printed)
 399     putc ('\n', stream);
 400   print.printed = 0;
 401
 402   if (!flag_no_line_commands)
 403     {
 404       const char *file_path = LOCATION_FILE (src_loc);
 405       int sysp;
 406       size_t to_file_len = strlen (file_path);
 407       unsigned char *to_file_quoted =
 408          (unsigned char *) alloca (to_file_len * 4 + 1);
 409       unsigned char *p;
 410
 411       print.src_line = LOCATION_LINE (src_loc);
 412       print.src_file = file_path;
 413
 414       /* cpp_quote_string does not nul-terminate, so we have to do it
 415          ourselves.  */
 416       p = cpp_quote_string (to_file_quoted,
 417                             (const unsigned char *) file_path,
 418                             to_file_len);
 419       *p = '\0';
 420       fprintf (stream, "# %u \"%s\"%s",
 421                print.src_line == 0 ? 1 : print.src_line,
 422                to_file_quoted, special_flags);
 423
 424       sysp = in_system_header_at (src_loc);
 425       if (sysp == 2)
 426         fputs (" 3 4", stream);
 427       else if (sysp == 1)
 428         fputs (" 3", stream);
 429
 430       putc ('\n', stream);
 431       emitted_line_marker = true;
 432     }
 433
 434   return emitted_line_marker;
 435 }
 436
 437 /* Output a line marker for logical line LINE.  Special flags are "1"
 438    or "2" indicating entering or leaving a file.  Return TRUE if a
 439    line marker was effectively emitted, FALSE otherwise.  */
 440
 441 static bool
 442 print_line (source_location src_loc, const char *special_flags)
 443 {
 444     if (cpp_get_options (parse_in)->debug)
 445       linemap_dump_location (line_table, src_loc,
 446                              print.outf);
 447     return print_line_1 (src_loc, special_flags, print.outf);
 448 }
 449
 450 /* Helper function for cb_line_change and scan_translation_unit.
 451    Return TRUE if a line marker is emitted, FALSE otherwise.  */
 452 static bool
 453 do_line_change (cpp_reader *pfile, const cpp_token *token,
 454                 source_location src_loc, int parsing_args)
 455 {
 456   bool emitted_line_marker = false;
 457   if (define_queue || undef_queue)
 458     dump_queued_macros (pfile);
 459
 460   if (token->type == CPP_EOF || parsing_args)
 461     return false;
 462
 463   emitted_line_marker = maybe_print_line (src_loc);
 464   print.prev = 0;
 465   print.source = 0;
 466
 467   /* Supply enough spaces to put this token in its original column,
 468      one space per column greater than 2, since scan_translation_unit
 469      will provide a space if PREV_WHITE.  Don't bother trying to
 470      reconstruct tabs; we can't get it right in general, and nothing
 471      ought to care.  Some things do care; the fault lies with them.  */
 472   if (!CPP_OPTION (pfile, traditional))
 473     {
 474       int spaces = LOCATION_COLUMN (src_loc) - 2;
 475       print.printed = 1;
 476
 477       while (-- spaces >= 0)
 478         putc (' ', print.outf);
 479     }
 480
 481   return emitted_line_marker;
 482 }
 483
 484 /* Called when a line of output is started.  TOKEN is the first token
 485    of the line, and at end of file will be CPP_EOF.  */
 486 static void
 487 cb_line_change (cpp_reader *pfile, const cpp_token *token,
 488                 int parsing_args)
 489 {
 490   do_line_change (pfile, token, token->src_loc, parsing_args);
 491 }
 492
 493 static void
 494 cb_ident (cpp_reader *pfile ATTRIBUTE_UNUSED, source_location line,
 495           const cpp_string *str)
 496 {
 497   maybe_print_line (line);
 498   fprintf (print.outf, "#ident %s\n", str->text);
 499   print.src_line++;
 500 }
 501
 502 static void
 503 cb_define (cpp_reader *pfile, source_location line, cpp_hashnode *node)
 504 {
 505   const struct line_map *map;
 506
 507   maybe_print_line (line);
 508   fputs ("#define ", print.outf);
 509
 510   /* 'D' is whole definition; 'N' is name only.  */
 511   if (flag_dump_macros == 'D')
 512     fputs ((const char *) cpp_macro_definition (pfile, node),
 513            print.outf);
 514   else
 515     fputs ((const char *) NODE_NAME (node), print.outf);
 516
 517   putc ('\n', print.outf);
 518   linemap_resolve_location (line_table, line,
 519                             LRK_MACRO_DEFINITION_LOCATION,
 520                             &map);
 521   if (LINEMAP_LINE (map) != 0)
 522     print.src_line++;
 523 }
 524
 525 static void
 526 cb_undef (cpp_reader *pfile ATTRIBUTE_UNUSED, source_location line,
 527           cpp_hashnode *node)
 528 {
 529   maybe_print_line (line);
 530   fprintf (print.outf, "#undef %s\n", NODE_NAME (node));
 531   print.src_line++;
 532 }
 533
 534 static void
 535 cb_used_define (cpp_reader *pfile, source_location line ATTRIBUTE_UNUSED,
 536                 cpp_hashnode *node)
 537 {
 538   macro_queue *q;
 539   if (node->flags & NODE_BUILTIN)
 540     return;
 541   q = XNEW (macro_queue);
 542   q->macro = xstrdup ((const char *) cpp_macro_definition (pfile, node));
 543   q->next = define_queue;
 544   define_queue = q;
 545 }
 546
 547 static void
 548 cb_used_undef (cpp_reader *pfile ATTRIBUTE_UNUSED,
 549                source_location line ATTRIBUTE_UNUSED,
 550                cpp_hashnode *node)
 551 {
 552   macro_queue *q;
 553   q = XNEW (macro_queue);
 554   q->macro = xstrdup ((const char *) NODE_NAME (node));
 555   q->next = undef_queue;
 556   undef_queue = q;
 557 }
 558
 559 static void
 560 dump_queued_macros (cpp_reader *pfile ATTRIBUTE_UNUSED)
 561 {
 562   macro_queue *q;
 563
 564   /* End the previous line of text.  */
 565   if (print.printed)
 566     {
 567       putc ('\n', print.outf);
 568       print.src_line++;
 569       print.printed = 0;
 570     }
 571
 572   for (q = define_queue; q;)
 573     {
 574       macro_queue *oq;
 575       fputs ("#define ", print.outf);
 576       fputs (q->macro, print.outf);
 577       putc ('\n', print.outf);
 578       print.src_line++;
 579       oq = q;
 580       q = q->next;
 581       free (oq->macro);
 582       free (oq);
 583     }
 584   define_queue = NULL;
 585   for (q = undef_queue; q;)
 586     {
 587       macro_queue *oq;
 588       fprintf (print.outf, "#undef %s\n", q->macro);
 589       print.src_line++;
 590       oq = q;
 591       q = q->next;
 592       free (oq->macro);
 593       free (oq);
 594     }
 595   undef_queue = NULL;
 596 }
 597
 598 static void
 599 cb_include (cpp_reader *pfile ATTRIBUTE_UNUSED, source_location line,
 600             const unsigned char *dir, const char *header, int angle_brackets,
 601             const cpp_token **comments)
 602 {
 603   maybe_print_line (line);
 604   if (angle_brackets)
 605     fprintf (print.outf, "#%s <%s>", dir, header);
 606   else
 607     fprintf (print.outf, "#%s \"%s\"", dir, header);
 608
 609   if (comments != NULL)
 610     {
 611       while (*comments != NULL)
 612         {
 613           if ((*comments)->flags & PREV_WHITE)
 614             putc (' ', print.outf);
 615           cpp_output_token (*comments, print.outf);
 616           ++comments;
 617         }
 618     }
 619
 620   putc ('\n', print.outf);
 621   print.src_line++;
 622 }
 623
 624 /* Callback called when -fworking-director and -E to emit working
 625    directory in cpp output file.  */
 626
 627 void
 628 pp_dir_change (cpp_reader *pfile ATTRIBUTE_UNUSED, const char *dir)
 629 {
 630   size_t to_file_len = strlen (dir);
 631   unsigned char *to_file_quoted =
 632      (unsigned char *) alloca (to_file_len * 4 + 1);
 633   unsigned char *p;
 634
 635   /* cpp_quote_string does not nul-terminate, so we have to do it ourselves.  */
 636   p = cpp_quote_string (to_file_quoted, (const unsigned char *) dir, to_file_len);
 637   *p = '\0';
 638   fprintf (print.outf, "# 1 \"%s//\"\n", to_file_quoted);
 639 }
 640
 641 /* The file name, line number or system header flags have changed, as
 642    described in MAP.  */
 643
 644 void
 645 pp_file_change (const struct line_map *map)
 646 {
 647   const char *flags = "";
 648
 649   if (flag_no_line_commands)
 650     return;
 651
 652   if (map != NULL)
 653     {
 654       input_location = map->start_location;
 655       if (print.first_time)
 656         {
 657           /* Avoid printing foo.i when the main file is foo.c.  */
 658           if (!cpp_get_options (parse_in)->preprocessed)
 659             print_line (map->start_location, flags);
 660           print.first_time = 0;
 661         }
 662       else
 663         {
 664           /* Bring current file to correct line when entering a new file.  */
 665           if (map->reason == LC_ENTER)
 666             {
 667               const struct line_map *from = INCLUDED_FROM (line_table, map);
 668               maybe_print_line (LAST_SOURCE_LINE_LOCATION (from));
 669             }
 670           if (map->reason == LC_ENTER)
 671             flags = " 1";
 672           else if (map->reason == LC_LEAVE)
 673             flags = " 2";
 674           print_line (map->start_location, flags);
 675         }
 676     }
 677 }
 678
 679 /* Copy a #pragma directive to the preprocessed output.  */
 680 static void
 681 cb_def_pragma (cpp_reader *pfile, source_location line)
 682 {
 683   maybe_print_line (line);
 684   fputs ("#pragma ", print.outf);
 685   cpp_output_line (pfile, print.outf);
 686   print.src_line++;
 687 }
 688
 689 /* Dump out the hash table.  */
 690 static int
 691 dump_macro (cpp_reader *pfile, cpp_hashnode *node, void *v ATTRIBUTE_UNUSED)
 692 {
 693   if (node->type == NT_MACRO && !(node->flags & NODE_BUILTIN))
 694     {
 695       fputs ("#define ", print.outf);
 696       fputs ((const char *) cpp_macro_definition (pfile, node),
 697              print.outf);
 698       putc ('\n', print.outf);
 699       print.src_line++;
 700     }
 701
 702   return 1;
 703 }
 704
 705 /* Load in the PCH file NAME, open on FD.  It was originally searched for
 706    by ORIG_NAME.  Also, print out a #include command so that the PCH
 707    file can be loaded when the preprocessed output is compiled.  */
 708
 709 static void
 710 cb_read_pch (cpp_reader *pfile, const char *name,
 711              int fd, const char *orig_name ATTRIBUTE_UNUSED)
 712 {
 713   c_common_read_pch (pfile, name, fd, orig_name);
 714
 715   fprintf (print.outf, "#pragma GCC pch_preprocess \"%s\"\n", name);
 716   print.src_line++;
 717 }