2 Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001 Free Software Foundation, Inc.
4 Contributed by Per Bothner, 1994-95.
5 Based on CCCP program by Paul Rubin, June 1986
6 Adapted to ANSI C, Richard Stallman, Jan 1987
8 This program is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by the
10 Free Software Foundation; either version 2, or (at your option) any
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
31 #include "cppdefault.h"
33 /* Predefined symbols, built-in macros, and the default include path. */
35 #ifndef GET_ENV_PATH_LIST
36 #define GET_ENV_PATH_LIST(VAR,NAME) do { (VAR) = getenv (NAME); } while (0)
39 /* Windows does not natively support inodes, and neither does MSDOS.
40 Cygwin's emulation can generate non-unique inodes, so don't use it.
41 VMS has non-numeric inodes. */
43 # define INO_T_EQ(a, b) (!memcmp (&(a), &(b), sizeof (a)))
45 # if (defined _WIN32 && ! defined (_UWIN)) || defined __MSDOS__
46 # define INO_T_EQ(a, b) 0
48 # define INO_T_EQ(a, b) ((a) == (b))
52 /* Internal structures and prototypes. */
54 /* A `struct pending_option' remembers one -D, -A, -U, -include, or
57 typedef void (* cl_directive_handler) PARAMS ((cpp_reader *, const char *));
60 struct pending_option *next;
62 cl_directive_handler handler;
65 /* The `pending' structure accumulates all the options that are not
66 actually processed until we hit cpp_start_read. It consists of
67 several lists, one for each type of option. We keep both head and
68 tail pointers for quick insertion. */
71 struct pending_option *directive_head, *directive_tail;
73 struct search_path *quote_head, *quote_tail;
74 struct search_path *brack_head, *brack_tail;
75 struct search_path *systm_head, *systm_tail;
76 struct search_path *after_head, *after_tail;
78 struct pending_option *imacros_head, *imacros_tail;
79 struct pending_option *include_head, *include_tail;
83 #define APPEND(pend, list, elt) \
84 do { if (!(pend)->list##_head) (pend)->list##_head = (elt); \
85 else (pend)->list##_tail->next = (elt); \
86 (pend)->list##_tail = (elt); \
89 #define APPEND(pend, list, elt) \
90 do { if (!(pend)->list/**/_head) (pend)->list/**/_head = (elt); \
91 else (pend)->list/**/_tail->next = (elt); \
92 (pend)->list/**/_tail = (elt); \
96 static void print_help PARAMS ((void));
97 static void path_include PARAMS ((cpp_reader *,
99 static void init_library PARAMS ((void));
100 static void init_builtins PARAMS ((cpp_reader *));
101 static void append_include_chain PARAMS ((cpp_reader *,
103 static struct search_path * remove_dup_dir PARAMS ((cpp_reader *,
104 struct search_path *));
105 static struct search_path * remove_dup_dirs PARAMS ((cpp_reader *,
106 struct search_path *));
107 static void merge_include_chains PARAMS ((cpp_reader *));
108 static bool push_include PARAMS ((cpp_reader *,
109 struct pending_option *));
110 static void free_chain PARAMS ((struct pending_option *));
111 static void set_lang PARAMS ((cpp_reader *, enum c_lang));
112 static void init_dependency_output PARAMS ((cpp_reader *));
113 static void init_standard_includes PARAMS ((cpp_reader *));
114 static void new_pending_directive PARAMS ((struct cpp_pending *,
116 cl_directive_handler));
117 static void output_deps PARAMS ((cpp_reader *));
118 static int parse_option PARAMS ((const char *));
120 /* Fourth argument to append_include_chain: chain to use.
121 Note it's never asked to append to the quote chain. */
122 enum { BRACKET = 0, SYSTEM, AFTER };
124 /* If we have designated initializers (GCC >2.7) these tables can be
125 initialized, constant data. Otherwise, they have to be filled in at
127 #if HAVE_DESIGNATED_INITIALIZERS
129 #define init_trigraph_map() /* Nothing. */
130 #define TRIGRAPH_MAP \
131 __extension__ const U_CHAR _cpp_trigraph_map[UCHAR_MAX + 1] = {
134 #define s(p, v) [p] = v,
138 #define TRIGRAPH_MAP U_CHAR _cpp_trigraph_map[UCHAR_MAX + 1] = { 0 }; \
139 static void init_trigraph_map PARAMS ((void)) { \
140 unsigned char *x = _cpp_trigraph_map;
143 #define s(p, v) x[p] = v;
148 s('=', '#') s(')', ']') s('!', '|')
149 s('(', '[') s('\'', '^') s('>', '}')
150 s('/', '\\') s('<', '{') s('-', '~')
157 /* Given a colon-separated list of file names PATH,
158 add all the names to the search path for include files. */
161 path_include (pfile, list, path)
172 /* Find the end of this name. */
174 while (*q != 0 && *q != PATH_SEPARATOR) q++;
177 /* An empty name in the path stands for the current directory. */
178 name = (char *) xmalloc (2);
184 /* Otherwise use the directory that is named. */
185 name = (char *) xmalloc (q - p + 1);
186 memcpy (name, p, q - p);
190 append_include_chain (pfile, name, path, 0);
192 /* Advance past this name. */
200 /* Append DIR to include path PATH. DIR must be allocated on the
201 heap; this routine takes responsibility for freeing it. */
203 append_include_chain (pfile, dir, path, cxx_aware)
207 int cxx_aware ATTRIBUTE_UNUSED;
209 struct cpp_pending *pend = CPP_OPTION (pfile, pending);
210 struct search_path *new;
219 _cpp_simplify_pathname (dir);
223 /* Dirs that don't exist are silently ignored. */
225 cpp_notice_from_errno (pfile, dir);
226 else if (CPP_OPTION (pfile, verbose))
227 fprintf (stderr, _("ignoring nonexistent directory \"%s\"\n"), dir);
232 if (!S_ISDIR (st.st_mode))
234 cpp_notice (pfile, "%s: Not a directory", dir);
240 if (len > pfile->max_include_len)
241 pfile->max_include_len = len;
243 new = (struct search_path *) xmalloc (sizeof (struct search_path));
246 new->ino = st.st_ino;
247 new->dev = st.st_dev;
248 /* Both systm and after include file lists should be treated as system
249 include files since these two lists are really just a concatenation
250 of one "system" list. */
251 if (path == SYSTEM || path == AFTER)
252 #ifdef NO_IMPLICIT_EXTERN_C
255 new->sysp = cxx_aware ? 1 : 2;
259 new->name_map = NULL;
264 case BRACKET: APPEND (pend, brack, new); break;
265 case SYSTEM: APPEND (pend, systm, new); break;
266 case AFTER: APPEND (pend, after, new); break;
270 /* Handle a duplicated include path. PREV is the link in the chain
271 before the duplicate. The duplicate is removed from the chain and
272 freed. Returns PREV. */
273 static struct search_path *
274 remove_dup_dir (pfile, prev)
276 struct search_path *prev;
278 struct search_path *cur = prev->next;
280 if (CPP_OPTION (pfile, verbose))
281 fprintf (stderr, _("ignoring duplicate directory \"%s\"\n"), cur->name);
283 prev->next = cur->next;
284 free ((PTR) cur->name);
290 /* Remove duplicate directories from a chain. Returns the tail of the
291 chain, or NULL if the chain is empty. This algorithm is quadratic
292 in the number of -I switches, which is acceptable since there
293 aren't usually that many of them. */
294 static struct search_path *
295 remove_dup_dirs (pfile, head)
297 struct search_path *head;
299 struct search_path *prev = NULL, *cur, *other;
301 for (cur = head; cur; cur = cur->next)
303 for (other = head; other != cur; other = other->next)
304 if (INO_T_EQ (cur->ino, other->ino) && cur->dev == other->dev)
306 if (cur->sysp && !other->sysp)
309 "changing search order for system directory \"%s\"",
311 if (strcmp (cur->name, other->name))
313 " as it is the same as non-system directory \"%s\"",
317 " as it has already been specified as a non-system directory");
319 cur = remove_dup_dir (pfile, prev);
328 /* Merge the four include chains together in the order quote, bracket,
329 system, after. Remove duplicate dirs (as determined by
330 INO_T_EQ()). The system_include and after_include chains are never
331 referred to again after this function; all access is through the
332 bracket_include path.
334 For the future: Check if the directory is empty (but
335 how?) and possibly preload the include hash. */
338 merge_include_chains (pfile)
341 struct search_path *quote, *brack, *systm, *qtail;
343 struct cpp_pending *pend = CPP_OPTION (pfile, pending);
345 quote = pend->quote_head;
346 brack = pend->brack_head;
347 systm = pend->systm_head;
348 qtail = pend->quote_tail;
350 /* Paste together bracket, system, and after include chains. */
352 pend->systm_tail->next = pend->after_head;
354 systm = pend->after_head;
357 pend->brack_tail->next = systm;
361 /* This is a bit tricky. First we drop dupes from the quote-include
362 list. Then we drop dupes from the bracket-include list.
363 Finally, if qtail and brack are the same directory, we cut out
364 brack and move brack up to point to qtail.
366 We can't just merge the lists and then uniquify them because
367 then we may lose directories from the <> search path that should
368 be there; consider -Ifoo -Ibar -I- -Ifoo -Iquux. It is however
369 safe to treat -Ibar -Ifoo -I- -Ifoo -Iquux as if written
370 -Ibar -I- -Ifoo -Iquux. */
372 remove_dup_dirs (pfile, brack);
373 qtail = remove_dup_dirs (pfile, quote);
379 /* If brack == qtail, remove brack as it's simpler. */
380 if (INO_T_EQ (qtail->ino, brack->ino) && qtail->dev == brack->dev)
381 brack = remove_dup_dir (pfile, qtail);
386 CPP_OPTION (pfile, quote_include) = quote;
387 CPP_OPTION (pfile, bracket_include) = brack;
390 /* Sets internal flags correctly for a given language, and defines
391 macros if necessary. */
398 char extended_numbers;
400 char dollars_in_ident;
401 char cplusplus_comments;
405 /* ??? Enable $ in identifiers in assembly? */
406 static const struct lang_flags lang_defaults[] =
407 { /* c99 objc c++ xnum trig dollar c++comm digr */
408 /* GNUC89 */ { 0, 0, 0, 1, 0, 1, 1, 1 },
409 /* GNUC99 */ { 1, 0, 0, 1, 0, 1, 1, 1 },
410 /* STDC89 */ { 0, 0, 0, 0, 1, 0, 0, 0 },
411 /* STDC94 */ { 0, 0, 0, 0, 1, 0, 0, 1 },
412 /* STDC99 */ { 1, 0, 0, 1, 1, 0, 1, 1 },
413 /* GNUCXX */ { 0, 0, 1, 1, 0, 1, 1, 1 },
414 /* CXX98 */ { 0, 0, 1, 1, 1, 0, 1, 1 },
415 /* OBJC */ { 0, 1, 0, 1, 0, 1, 1, 1 },
416 /* OBJCXX */ { 0, 1, 1, 1, 0, 1, 1, 1 },
417 /* ASM */ { 0, 0, 0, 1, 0, 0, 1, 0 }
421 set_lang (pfile, lang)
425 const struct lang_flags *l = &lang_defaults[(int) lang];
427 CPP_OPTION (pfile, lang) = lang;
429 CPP_OPTION (pfile, c99) = l->c99;
430 CPP_OPTION (pfile, objc) = l->objc;
431 CPP_OPTION (pfile, cplusplus) = l->cplusplus;
432 CPP_OPTION (pfile, extended_numbers) = l->extended_numbers;
433 CPP_OPTION (pfile, trigraphs) = l->trigraphs;
434 CPP_OPTION (pfile, dollars_in_ident) = l->dollars_in_ident;
435 CPP_OPTION (pfile, cplusplus_comments) = l->cplusplus_comments;
436 CPP_OPTION (pfile, digraphs) = l->digraphs;
440 static int opt_comp PARAMS ((const void *, const void *));
442 /* Run-time sorting of options array. */
447 return strcmp (((struct cl_option *) p1)->opt_text,
448 ((struct cl_option *) p2)->opt_text);
452 /* init initializes library global state. It might not need to
453 do anything depending on the platform and compiler. */
458 static int initialized = 0;
465 /* For non-ASCII hosts, the cl_options array needs to be sorted at
467 qsort (cl_options, N_OPTS, sizeof (struct cl_option), opt_comp);
470 /* Set up the trigraph map. This doesn't need to do anything if
471 we were compiled with a compiler that supports C99 designated
473 init_trigraph_map ();
477 /* Initialize a cpp_reader structure. */
479 cpp_create_reader (table, lang)
483 struct spec_nodes *s;
486 /* Initialise this instance of the library if it hasn't been already. */
489 pfile = (cpp_reader *) xcalloc (1, sizeof (cpp_reader));
491 set_lang (pfile, lang);
492 CPP_OPTION (pfile, warn_import) = 1;
493 CPP_OPTION (pfile, discard_comments) = 1;
494 CPP_OPTION (pfile, show_column) = 1;
495 CPP_OPTION (pfile, tabstop) = 8;
496 CPP_OPTION (pfile, operator_names) = 1;
498 CPP_OPTION (pfile, pending) =
499 (struct cpp_pending *) xcalloc (1, sizeof (struct cpp_pending));
501 /* It's simplest to just create this struct whether or not it will
503 pfile->deps = deps_init ();
505 /* Initialise the line map. */
506 init_line_maps (&pfile->line_maps);
508 /* Initialize lexer state. */
509 pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments);
511 /* Indicate date and time not yet calculated. */
512 pfile->date.type = CPP_EOF;
514 /* Create a token buffer for the lexer. */
515 _cpp_init_tokenrun (&pfile->base_run, 250);
516 pfile->cur_run = &pfile->base_run;
517 pfile->cur_token = pfile->base_run.base;
518 pfile->state.bol = 1;
520 /* Initialise the base context. */
521 pfile->context = &pfile->base_context;
522 pfile->base_context.macro = 0;
523 pfile->base_context.prev = pfile->base_context.next = 0;
525 /* Identifier pool initially 8K. Unaligned, permanent pool. */
526 _cpp_init_pool (&pfile->ident_pool, 8 * 1024, 1, 0);
528 /* Argument pool initially 8K. Aligned, temporary pool. */
529 _cpp_init_pool (&pfile->argument_pool, 8 * 1024, 0, 1);
531 /* Macro pool initially 8K. Aligned, permanent pool. */
532 _cpp_init_pool (&pfile->macro_pool, 8 * 1024, 0, 0);
534 /* Initialise the buffer obstack. */
535 gcc_obstack_init (&pfile->buffer_ob);
537 /* Initialise the hashtable. */
538 _cpp_init_hashtable (pfile, table);
540 _cpp_init_directives (pfile);
541 _cpp_init_includes (pfile);
542 _cpp_init_internal_pragmas (pfile);
544 /* Initialize the special nodes. */
545 s = &pfile->spec_nodes;
546 s->n_L = cpp_lookup (pfile, DSC("L"));
547 s->n_defined = cpp_lookup (pfile, DSC("defined"));
548 s->n_true = cpp_lookup (pfile, DSC("true"));
549 s->n_false = cpp_lookup (pfile, DSC("false"));
550 s->n__Pragma = cpp_lookup (pfile, DSC("_Pragma"));
551 s->n__STRICT_ANSI__ = cpp_lookup (pfile, DSC("__STRICT_ANSI__"));
552 s->n__CHAR_UNSIGNED__ = cpp_lookup (pfile, DSC("__CHAR_UNSIGNED__"));
553 s->n__VA_ARGS__ = cpp_lookup (pfile, DSC("__VA_ARGS__"));
554 s->n__VA_ARGS__->flags |= NODE_DIAGNOSTIC;
559 /* Free resources used by PFILE. Accessing PFILE after this function
560 returns leads to undefined behaviour. */
566 struct search_path *dir, *dirn;
567 cpp_context *context, *contextn;
569 while (CPP_BUFFER (pfile) != NULL)
570 _cpp_pop_buffer (pfile);
572 if (pfile->macro_buffer)
574 free ((PTR) pfile->macro_buffer);
575 pfile->macro_buffer = NULL;
576 pfile->macro_buffer_len = 0;
579 deps_free (pfile->deps);
580 obstack_free (&pfile->buffer_ob, 0);
582 _cpp_destroy_hashtable (pfile);
583 _cpp_cleanup_includes (pfile);
584 _cpp_free_lookaheads (pfile);
586 _cpp_free_pool (&pfile->ident_pool);
587 _cpp_free_pool (&pfile->macro_pool);
588 _cpp_free_pool (&pfile->argument_pool);
590 for (dir = CPP_OPTION (pfile, quote_include); dir; dir = dirn)
593 free ((PTR) dir->name);
597 for (context = pfile->base_context.next; context; context = contextn)
599 contextn = context->next;
603 free_line_maps (&pfile->line_maps);
605 result = pfile->errors;
612 /* This structure defines one built-in identifier. A node will be
613 entered in the hash table under the name NAME, with value VALUE (if
614 any). If flags has OPERATOR, the node's operator field is used; if
615 flags has BUILTIN the node's builtin field is used. Macros that are
616 known at build time should not be flagged BUILTIN, as then they do
617 not appear in macro dumps with e.g. -dM or -dD.
619 Two values are not compile time constants, so we tag
620 them in the FLAGS field instead:
621 VERS value is the global version_string, quoted
622 ULP value is the global user_label_prefix
624 Also, macros with CPLUS set in the flags field are entered only for C++. */
630 unsigned char builtin;
631 unsigned char operator;
632 unsigned short flags;
639 #define OPERATOR 0x10
641 #define B(n, t) { U n, 0, t, 0, BUILTIN, sizeof n - 1 }
642 #define C(n, v) { U n, v, 0, 0, 0, sizeof n - 1 }
643 #define X(n, f) { U n, 0, 0, 0, f, sizeof n - 1 }
644 #define O(n, c, f) { U n, 0, 0, c, OPERATOR | f, sizeof n - 1 }
645 static const struct builtin builtin_array[] =
647 B("__TIME__", BT_TIME),
648 B("__DATE__", BT_DATE),
649 B("__FILE__", BT_FILE),
650 B("__BASE_FILE__", BT_BASE_FILE),
651 B("__LINE__", BT_SPECLINE),
652 B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL),
654 X("__VERSION__", VERS),
655 X("__USER_LABEL_PREFIX__", ULP),
656 C("__REGISTER_PREFIX__", REGISTER_PREFIX),
657 C("__HAVE_BUILTIN_SETJMP__", "1"),
658 #ifndef NO_BUILTIN_SIZE_TYPE
659 C("__SIZE_TYPE__", SIZE_TYPE),
661 #ifndef NO_BUILTIN_PTRDIFF_TYPE
662 C("__PTRDIFF_TYPE__", PTRDIFF_TYPE),
664 #ifndef NO_BUILTIN_WCHAR_TYPE
665 C("__WCHAR_TYPE__", WCHAR_TYPE),
667 #ifndef NO_BUILTIN_WINT_TYPE
668 C("__WINT_TYPE__", WINT_TYPE),
670 #ifdef STDC_0_IN_SYSTEM_HEADERS
671 B("__STDC__", BT_STDC),
676 /* Named operators known to the preprocessor. These cannot be #defined
677 and always have their stated meaning. They are treated like normal
678 identifiers except for the type code and the meaning. Most of them
679 are only for C++ (but see iso646.h). */
680 O("and", CPP_AND_AND, CPLUS),
681 O("and_eq", CPP_AND_EQ, CPLUS),
682 O("bitand", CPP_AND, CPLUS),
683 O("bitor", CPP_OR, CPLUS),
684 O("compl", CPP_COMPL, CPLUS),
685 O("not", CPP_NOT, CPLUS),
686 O("not_eq", CPP_NOT_EQ, CPLUS),
687 O("or", CPP_OR_OR, CPLUS),
688 O("or_eq", CPP_OR_EQ, CPLUS),
689 O("xor", CPP_XOR, CPLUS),
690 O("xor_eq", CPP_XOR_EQ, CPLUS)
696 #define builtin_array_end \
697 builtin_array + sizeof(builtin_array)/sizeof(struct builtin)
699 /* Subroutine of cpp_start_read; reads the builtins table above and
700 enters the macros into the hash table. */
702 init_builtins (pfile)
705 const struct builtin *b;
707 for(b = builtin_array; b < builtin_array_end; b++)
709 if ((b->flags & CPLUS) && ! CPP_OPTION (pfile, cplusplus))
712 if ((b->flags & OPERATOR) && ! CPP_OPTION (pfile, operator_names))
715 if (b->flags & (OPERATOR | BUILTIN))
717 cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len);
718 if (b->flags & OPERATOR)
720 hp->flags |= NODE_OPERATOR;
721 hp->value.operator = b->operator;
726 hp->flags |= NODE_BUILTIN | NODE_WARN;
727 hp->value.builtin = b->builtin;
730 else /* A standard macro of some kind. */
737 /* Allocate enough space for 'name "value"\n\0'. */
738 str = alloca (b->len + strlen (version_string) + 5);
739 sprintf (str, "%s \"%s\"\n", b->name, version_string);
744 val = CPP_OPTION (pfile, user_label_prefix);
748 /* Allocate enough space for "name value\n\0". */
749 str = alloca (b->len + strlen (val) + 3);
750 sprintf(str, "%s %s\n", b->name, val);
753 _cpp_define_builtin (pfile, str);
757 if (CPP_OPTION (pfile, cplusplus))
759 _cpp_define_builtin (pfile, "__cplusplus 1");
760 if (SUPPORTS_ONE_ONLY)
761 _cpp_define_builtin (pfile, "__GXX_WEAK__ 1");
763 _cpp_define_builtin (pfile, "__GXX_WEAK__ 0");
765 if (CPP_OPTION (pfile, objc))
766 _cpp_define_builtin (pfile, "__OBJC__ 1");
768 if (CPP_OPTION (pfile, lang) == CLK_STDC94)
769 _cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L");
770 else if (CPP_OPTION (pfile, c99))
771 _cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L");
773 if (CPP_OPTION (pfile, lang) == CLK_STDC89
774 || CPP_OPTION (pfile, lang) == CLK_STDC94
775 || CPP_OPTION (pfile, lang) == CLK_STDC99)
776 _cpp_define_builtin (pfile, "__STRICT_ANSI__ 1");
777 else if (CPP_OPTION (pfile, lang) == CLK_ASM)
778 _cpp_define_builtin (pfile, "__ASSEMBLER__ 1");
785 #undef builtin_array_end
787 /* And another subroutine. This one sets up the standard include path. */
789 init_standard_includes (pfile)
793 const struct default_include *p;
794 const char *specd_prefix = CPP_OPTION (pfile, include_prefix);
796 /* Several environment variables may add to the include search path.
797 CPATH specifies an additional list of directories to be searched
798 as if specified with -I, while C_INCLUDE_PATH, CPLUS_INCLUDE_PATH,
799 etc. specify an additional list of directories to be searched as
800 if specified with -isystem, for the language indicated. */
802 GET_ENV_PATH_LIST (path, "CPATH");
803 if (path != 0 && *path != 0)
804 path_include (pfile, path, BRACKET);
806 switch ((CPP_OPTION (pfile, objc) << 1) + CPP_OPTION (pfile, cplusplus))
809 GET_ENV_PATH_LIST (path, "C_INCLUDE_PATH");
812 GET_ENV_PATH_LIST (path, "CPLUS_INCLUDE_PATH");
815 GET_ENV_PATH_LIST (path, "OBJC_INCLUDE_PATH");
818 GET_ENV_PATH_LIST (path, "OBJCPLUS_INCLUDE_PATH");
821 if (path != 0 && *path != 0)
822 path_include (pfile, path, SYSTEM);
824 /* Search "translated" versions of GNU directories.
825 These have /usr/local/lib/gcc... replaced by specd_prefix. */
826 if (specd_prefix != 0 && cpp_GCC_INCLUDE_DIR_len)
828 /* Remove the `include' from /usr/local/lib/gcc.../include.
829 GCC_INCLUDE_DIR will always end in /include. */
830 int default_len = cpp_GCC_INCLUDE_DIR_len;
831 char *default_prefix = (char *) alloca (default_len + 1);
832 int specd_len = strlen (specd_prefix);
834 memcpy (default_prefix, cpp_GCC_INCLUDE_DIR, default_len);
835 default_prefix[default_len] = '\0';
837 for (p = cpp_include_defaults; p->fname; p++)
839 /* Some standard dirs are only for C++. */
841 || (CPP_OPTION (pfile, cplusplus)
842 && !CPP_OPTION (pfile, no_standard_cplusplus_includes)))
844 /* Does this dir start with the prefix? */
845 if (!memcmp (p->fname, default_prefix, default_len))
847 /* Yes; change prefix and add to search list. */
848 int flen = strlen (p->fname);
849 int this_len = specd_len + flen - default_len;
850 char *str = (char *) xmalloc (this_len + 1);
851 memcpy (str, specd_prefix, specd_len);
852 memcpy (str + specd_len,
853 p->fname + default_len,
854 flen - default_len + 1);
856 append_include_chain (pfile, str, SYSTEM, p->cxx_aware);
862 /* Search ordinary names for GNU include directories. */
863 for (p = cpp_include_defaults; p->fname; p++)
865 /* Some standard dirs are only for C++. */
867 || (CPP_OPTION (pfile, cplusplus)
868 && !CPP_OPTION (pfile, no_standard_cplusplus_includes)))
870 char *str = update_path (p->fname, p->component);
871 append_include_chain (pfile, str, SYSTEM, p->cxx_aware);
876 /* Pushes a -imacro and -include file given on the command line onto
877 the buffer stack. Returns non-zero if successful. */
879 push_include (pfile, p)
881 struct pending_option *p;
885 /* Later: maybe update this to use the #include "" search path
886 if cpp_read_file fails. */
887 header.type = CPP_STRING;
888 header.val.str.text = (const unsigned char *) p->arg;
889 header.val.str.len = strlen (p->arg);
890 /* Make the command line directive take up a line. */
891 pfile->lexer_pos.line = pfile->lexer_pos.output_line = ++pfile->line;
893 return _cpp_execute_include (pfile, &header, IT_CMDLINE);
896 /* Frees a pending_option chain. */
899 struct pending_option *head;
901 struct pending_option *next;
911 /* This is called after options have been processed. Setup for
912 processing input from the file named FNAME, or stdin if it is the
913 empty string. Return 1 on success, 0 on failure. */
915 cpp_start_read (pfile, fname)
919 /* Set up the include search path now. */
920 if (! CPP_OPTION (pfile, no_standard_includes))
921 init_standard_includes (pfile);
923 merge_include_chains (pfile);
925 /* With -v, print the list of dirs to search. */
926 if (CPP_OPTION (pfile, verbose))
928 struct search_path *l;
929 fprintf (stderr, _("#include \"...\" search starts here:\n"));
930 for (l = CPP_OPTION (pfile, quote_include); l; l = l->next)
932 if (l == CPP_OPTION (pfile, bracket_include))
933 fprintf (stderr, _("#include <...> search starts here:\n"));
934 fprintf (stderr, " %s\n", l->name);
936 fprintf (stderr, _("End of search list.\n"));
939 if (CPP_OPTION (pfile, print_deps))
940 /* Set the default target (if there is none already). */
941 deps_add_default_target (pfile->deps, fname);
943 /* Open the main input file. This must be done early, so we have a
944 buffer to stand on. */
945 if (!_cpp_read_file (pfile, fname))
948 /* Set this after cpp_post_options so the client can change the
949 option if it wishes, and after stacking the main file so we don't
950 trace the main file. */
951 pfile->line_maps.trace_includes = CPP_OPTION (pfile, print_include_names);
953 /* Install builtins and process command line macros etc. in the order
954 they appeared, but only if not already preprocessed. */
955 if (! CPP_OPTION (pfile, preprocessed))
957 struct pending_option *p;
959 _cpp_do_file_change (pfile, LC_RENAME, _("<builtin>"), 1, 0);
960 init_builtins (pfile);
961 _cpp_do_file_change (pfile, LC_RENAME, _("<command line>"), 1, 0);
962 for (p = CPP_OPTION (pfile, pending)->directive_head; p; p = p->next)
963 (*p->handler) (pfile, p->arg);
965 /* Scan -imacros files after command line defines, but before
966 files given with -include. */
967 while ((p = CPP_OPTION (pfile, pending)->imacros_head) != NULL)
969 if (push_include (pfile, p))
971 pfile->buffer->return_at_eof = true;
972 cpp_scan_nooutput (pfile);
974 CPP_OPTION (pfile, pending)->imacros_head = p->next;
979 free_chain (CPP_OPTION (pfile, pending)->directive_head);
980 _cpp_push_next_buffer (pfile);
985 /* Called to push the next buffer on the stack given by -include. If
986 there are none, free the pending structure and restore the line map
987 for the main file. */
989 _cpp_push_next_buffer (pfile)
994 /* This is't pretty; we'd rather not be relying on this as a boolean
995 for reverting the line map. Further, we only free the chains in
996 this conditional, so an early call to cpp_finish / cpp_destroy
997 will leak that memory. */
998 if (CPP_OPTION (pfile, pending)
999 && CPP_OPTION (pfile, pending)->imacros_head == NULL)
1003 struct pending_option *p = CPP_OPTION (pfile, pending)->include_head;
1007 if (! CPP_OPTION (pfile, preprocessed))
1008 pushed = push_include (pfile, p);
1009 CPP_OPTION (pfile, pending)->include_head = p->next;
1015 free (CPP_OPTION (pfile, pending));
1016 CPP_OPTION (pfile, pending) = NULL;
1018 /* Restore the line map for the main file. */
1019 if (! CPP_OPTION (pfile, preprocessed))
1020 _cpp_do_file_change (pfile, LC_RENAME,
1021 pfile->line_maps.maps[0].to_file, 1, 0);
1028 /* Use mkdeps.c to output dependency information. */
1033 /* Stream on which to print the dependency information. */
1034 FILE *deps_stream = 0;
1035 const char *const deps_mode =
1036 CPP_OPTION (pfile, print_deps_append) ? "a" : "w";
1038 if (CPP_OPTION (pfile, deps_file) == 0)
1039 deps_stream = stdout;
1042 deps_stream = fopen (CPP_OPTION (pfile, deps_file), deps_mode);
1043 if (deps_stream == 0)
1045 cpp_notice_from_errno (pfile, CPP_OPTION (pfile, deps_file));
1050 deps_write (pfile->deps, deps_stream, 72);
1052 if (CPP_OPTION (pfile, deps_phony_targets))
1053 deps_phony_targets (pfile->deps, deps_stream);
1055 /* Don't close stdout. */
1056 if (CPP_OPTION (pfile, deps_file))
1058 if (ferror (deps_stream) || fclose (deps_stream) != 0)
1059 cpp_fatal (pfile, "I/O error on output");
1063 /* This is called at the end of preprocessing. It pops the
1064 last buffer and writes dependency output. It should also
1065 clear macro definitions, such that you could call cpp_start_read
1066 with a new filename to restart processing. */
1071 /* cpplex.c leaves the final buffer on the stack. This it so that
1072 it returns an unending stream of CPP_EOFs to the client. If we
1073 popped the buffer, we'd derefence a NULL buffer pointer and
1074 segfault. It's nice to allow the client to do worry-free excess
1075 cpp_get_token calls. */
1076 while (pfile->buffer)
1077 _cpp_pop_buffer (pfile);
1079 /* Don't write the deps file if preprocessing has failed. */
1080 if (CPP_OPTION (pfile, print_deps) && pfile->errors == 0)
1081 output_deps (pfile);
1083 /* Report on headers that could use multiple include guards. */
1084 if (CPP_OPTION (pfile, print_include_names))
1085 _cpp_report_missing_guards (pfile);
1089 new_pending_directive (pend, text, handler)
1090 struct cpp_pending *pend;
1092 cl_directive_handler handler;
1094 struct pending_option *o = (struct pending_option *)
1095 xmalloc (sizeof (struct pending_option));
1099 o->handler = handler;
1100 APPEND (pend, directive, o);
1103 /* Irix6 "cc -n32" and OSF4 cc have problems with char foo[] = ("string");
1104 I.e. a const string initializer with parens around it. That is
1105 what N_("string") resolves to, so we make no_* be macros instead. */
1106 #define no_arg N_("Argument missing after %s")
1107 #define no_ass N_("Assertion missing after %s")
1108 #define no_dir N_("Directory name missing after %s")
1109 #define no_fil N_("File name missing after %s")
1110 #define no_mac N_("Macro name missing after %s")
1111 #define no_pth N_("Path name missing after %s")
1112 #define no_num N_("Number missing after %s")
1113 #define no_tgt N_("Target missing after %s")
1115 /* This is the list of all command line options, with the leading
1116 "-" removed. It must be sorted in ASCII collating order. */
1117 #define COMMAND_LINE_OPTIONS \
1118 DEF_OPT("$", 0, OPT_dollar) \
1119 DEF_OPT("+", 0, OPT_plus) \
1120 DEF_OPT("-help", 0, OPT__help) \
1121 DEF_OPT("-target-help", 0, OPT_target__help) \
1122 DEF_OPT("-version", 0, OPT__version) \
1123 DEF_OPT("A", no_ass, OPT_A) \
1124 DEF_OPT("C", 0, OPT_C) \
1125 DEF_OPT("D", no_mac, OPT_D) \
1126 DEF_OPT("H", 0, OPT_H) \
1127 DEF_OPT("I", no_dir, OPT_I) \
1128 DEF_OPT("M", 0, OPT_M) \
1129 DEF_OPT("MD", no_fil, OPT_MD) \
1130 DEF_OPT("MF", no_fil, OPT_MF) \
1131 DEF_OPT("MG", 0, OPT_MG) \
1132 DEF_OPT("MM", 0, OPT_MM) \
1133 DEF_OPT("MMD", no_fil, OPT_MMD) \
1134 DEF_OPT("MP", 0, OPT_MP) \
1135 DEF_OPT("MQ", no_tgt, OPT_MQ) \
1136 DEF_OPT("MT", no_tgt, OPT_MT) \
1137 DEF_OPT("P", 0, OPT_P) \
1138 DEF_OPT("U", no_mac, OPT_U) \
1139 DEF_OPT("W", no_arg, OPT_W) /* arg optional */ \
1140 DEF_OPT("d", no_arg, OPT_d) \
1141 DEF_OPT("fleading-underscore", 0, OPT_fleading_underscore) \
1142 DEF_OPT("fno-leading-underscore", 0, OPT_fno_leading_underscore) \
1143 DEF_OPT("fno-operator-names", 0, OPT_fno_operator_names) \
1144 DEF_OPT("fno-preprocessed", 0, OPT_fno_preprocessed) \
1145 DEF_OPT("fno-show-column", 0, OPT_fno_show_column) \
1146 DEF_OPT("fpreprocessed", 0, OPT_fpreprocessed) \
1147 DEF_OPT("fshow-column", 0, OPT_fshow_column) \
1148 DEF_OPT("ftabstop=", no_num, OPT_ftabstop) \
1149 DEF_OPT("h", 0, OPT_h) \
1150 DEF_OPT("idirafter", no_dir, OPT_idirafter) \
1151 DEF_OPT("imacros", no_fil, OPT_imacros) \
1152 DEF_OPT("include", no_fil, OPT_include) \
1153 DEF_OPT("iprefix", no_pth, OPT_iprefix) \
1154 DEF_OPT("isystem", no_dir, OPT_isystem) \
1155 DEF_OPT("iwithprefix", no_dir, OPT_iwithprefix) \
1156 DEF_OPT("iwithprefixbefore", no_dir, OPT_iwithprefixbefore) \
1157 DEF_OPT("lang-asm", 0, OPT_lang_asm) \
1158 DEF_OPT("lang-c", 0, OPT_lang_c) \
1159 DEF_OPT("lang-c++", 0, OPT_lang_cplusplus) \
1160 DEF_OPT("lang-c89", 0, OPT_lang_c89) \
1161 DEF_OPT("lang-objc", 0, OPT_lang_objc) \
1162 DEF_OPT("lang-objc++", 0, OPT_lang_objcplusplus) \
1163 DEF_OPT("nostdinc", 0, OPT_nostdinc) \
1164 DEF_OPT("nostdinc++", 0, OPT_nostdincplusplus) \
1165 DEF_OPT("o", no_fil, OPT_o) \
1166 DEF_OPT("pedantic", 0, OPT_pedantic) \
1167 DEF_OPT("pedantic-errors", 0, OPT_pedantic_errors) \
1168 DEF_OPT("remap", 0, OPT_remap) \
1169 DEF_OPT("std=c++98", 0, OPT_std_cplusplus98) \
1170 DEF_OPT("std=c89", 0, OPT_std_c89) \
1171 DEF_OPT("std=c99", 0, OPT_std_c99) \
1172 DEF_OPT("std=c9x", 0, OPT_std_c9x) \
1173 DEF_OPT("std=gnu89", 0, OPT_std_gnu89) \
1174 DEF_OPT("std=gnu99", 0, OPT_std_gnu99) \
1175 DEF_OPT("std=gnu9x", 0, OPT_std_gnu9x) \
1176 DEF_OPT("std=iso9899:1990", 0, OPT_std_iso9899_1990) \
1177 DEF_OPT("std=iso9899:199409", 0, OPT_std_iso9899_199409) \
1178 DEF_OPT("std=iso9899:1999", 0, OPT_std_iso9899_1999) \
1179 DEF_OPT("std=iso9899:199x", 0, OPT_std_iso9899_199x) \
1180 DEF_OPT("trigraphs", 0, OPT_trigraphs) \
1181 DEF_OPT("v", 0, OPT_v) \
1182 DEF_OPT("version", 0, OPT_version) \
1183 DEF_OPT("w", 0, OPT_w)
1185 #define DEF_OPT(text, msg, code) code,
1188 COMMAND_LINE_OPTIONS
1195 const char *opt_text;
1198 enum opt_code opt_code;
1201 #define DEF_OPT(text, msg, code) { text, msg, sizeof(text) - 1, code },
1203 static struct cl_option cl_options[] =
1205 static const struct cl_option cl_options[] =
1208 COMMAND_LINE_OPTIONS
1211 #undef COMMAND_LINE_OPTIONS
1213 /* Perform a binary search to find which, if any, option the given
1214 command-line matches. Returns its index in the option array,
1215 negative on failure. Complications arise since some options can be
1216 suffixed with an argument, and multiple complete matches can occur,
1217 e.g. -iwithprefix and -iwithprefixbefore. Moreover, we need to
1218 accept options beginning with -W that we do not recognise, but not
1219 to swallow any subsequent command line argument; this is handled as
1220 special cases in cpp_handle_option. */
1222 parse_option (input)
1225 unsigned int md, mn, mx;
1236 opt_len = cl_options[md].opt_len;
1237 comp = memcmp (input, cl_options[md].opt_text, opt_len);
1245 if (input[opt_len] == '\0')
1247 /* We were passed more text. If the option takes an argument,
1248 we may match a later option or we may have been passed the
1249 argument. The longest possible option match succeeds.
1250 If the option takes no arguments we have not matched and
1251 continue the search (e.g. input="stdc++" match was "stdc"). */
1253 if (cl_options[md].msg)
1255 /* Scan forwards. If we get an exact match, return it.
1256 Otherwise, return the longest option-accepting match.
1257 This loops no more than twice with current options. */
1259 for (; mn < (unsigned int) N_OPTS; mn++)
1261 opt_len = cl_options[mn].opt_len;
1262 if (memcmp (input, cl_options[mn].opt_text, opt_len))
1264 if (input[opt_len] == '\0')
1266 if (cl_options[mn].msg)
1277 /* Handle one command-line option in (argc, argv).
1278 Can be called multiple times, to handle multiple sets of options.
1279 Returns number of strings consumed. */
1282 cpp_handle_option (pfile, argc, argv)
1288 struct cpp_pending *pend = CPP_OPTION (pfile, pending);
1290 /* Interpret "-" or a non-option as a file name. */
1291 if (argv[i][0] != '-' || argv[i][1] == '\0')
1293 if (CPP_OPTION (pfile, in_fname) == NULL)
1294 CPP_OPTION (pfile, in_fname) = argv[i];
1295 else if (CPP_OPTION (pfile, out_fname) == NULL)
1296 CPP_OPTION (pfile, out_fname) = argv[i];
1298 cpp_fatal (pfile, "Too many filenames. Type %s --help for usage info",
1303 enum opt_code opt_code;
1305 const char *arg = 0;
1307 /* Skip over '-'. */
1308 opt_index = parse_option (&argv[i][1]);
1312 opt_code = cl_options[opt_index].opt_code;
1313 if (cl_options[opt_index].msg)
1315 arg = &argv[i][cl_options[opt_index].opt_len + 1];
1317 /* Yuk. Special case for -W as it must not swallow
1318 up any following argument. If this becomes common, add
1319 another field to the cl_options table. */
1320 if (arg[0] == '\0' && opt_code != OPT_W)
1325 cpp_fatal (pfile, cl_options[opt_index].msg, argv[i - 1]);
1333 case N_OPTS: /* Shut GCC up. */
1335 case OPT_fleading_underscore:
1336 CPP_OPTION (pfile, user_label_prefix) = "_";
1338 case OPT_fno_leading_underscore:
1339 CPP_OPTION (pfile, user_label_prefix) = "";
1341 case OPT_fno_operator_names:
1342 CPP_OPTION (pfile, operator_names) = 0;
1344 case OPT_fpreprocessed:
1345 CPP_OPTION (pfile, preprocessed) = 1;
1347 case OPT_fno_preprocessed:
1348 CPP_OPTION (pfile, preprocessed) = 0;
1350 case OPT_fshow_column:
1351 CPP_OPTION (pfile, show_column) = 1;
1353 case OPT_fno_show_column:
1354 CPP_OPTION (pfile, show_column) = 0;
1357 /* Silently ignore empty string, non-longs and silly values. */
1361 long tabstop = strtol (arg, &endptr, 10);
1362 if (*endptr == '\0' && tabstop >= 1 && tabstop <= 100)
1363 CPP_OPTION (pfile, tabstop) = tabstop;
1367 CPP_OPTION (pfile, inhibit_warnings) = 1;
1372 CPP_OPTION (pfile, help_only) = 1;
1374 case OPT_target__help:
1375 /* Print if any target specific options. cpplib has none, but
1376 make sure help_only gets set. */
1377 CPP_OPTION (pfile, help_only) = 1;
1380 /* --version inhibits compilation, -version doesn't. -v means
1381 verbose and -version. Historical reasons, don't ask. */
1383 CPP_OPTION (pfile, help_only) = 1;
1384 pfile->print_version = 1;
1387 CPP_OPTION (pfile, verbose) = 1;
1388 pfile->print_version = 1;
1391 pfile->print_version = 1;
1395 CPP_OPTION (pfile, discard_comments) = 0;
1398 CPP_OPTION (pfile, no_line_commands) = 1;
1400 case OPT_dollar: /* Don't include $ in identifiers. */
1401 CPP_OPTION (pfile, dollars_in_ident) = 0;
1404 CPP_OPTION (pfile, print_include_names) = 1;
1407 new_pending_directive (pend, arg, cpp_define);
1409 case OPT_pedantic_errors:
1410 CPP_OPTION (pfile, pedantic_errors) = 1;
1413 CPP_OPTION (pfile, pedantic) = 1;
1416 CPP_OPTION (pfile, trigraphs) = 1;
1419 CPP_OPTION (pfile, cplusplus) = 1;
1420 CPP_OPTION (pfile, cplusplus_comments) = 1;
1423 CPP_OPTION (pfile, remap) = 1;
1426 CPP_OPTION (pfile, include_prefix) = arg;
1427 CPP_OPTION (pfile, include_prefix_len) = strlen (arg);
1430 set_lang (pfile, CLK_GNUC89);
1432 case OPT_lang_cplusplus:
1433 set_lang (pfile, CLK_GNUCXX);
1436 set_lang (pfile, CLK_OBJC);
1438 case OPT_lang_objcplusplus:
1439 set_lang (pfile, CLK_OBJCXX);
1442 set_lang (pfile, CLK_ASM);
1444 case OPT_std_cplusplus98:
1445 set_lang (pfile, CLK_CXX98);
1448 set_lang (pfile, CLK_GNUC89);
1452 set_lang (pfile, CLK_GNUC99);
1454 case OPT_std_iso9899_199409:
1455 set_lang (pfile, CLK_STDC94);
1457 case OPT_std_iso9899_1990:
1460 set_lang (pfile, CLK_STDC89);
1462 case OPT_std_iso9899_199x:
1463 case OPT_std_iso9899_1999:
1466 set_lang (pfile, CLK_STDC99);
1469 /* -nostdinc causes no default include directories.
1470 You must specify all include-file directories with -I. */
1471 CPP_OPTION (pfile, no_standard_includes) = 1;
1473 case OPT_nostdincplusplus:
1474 /* -nostdinc++ causes no default C++-specific include directories. */
1475 CPP_OPTION (pfile, no_standard_cplusplus_includes) = 1;
1478 if (CPP_OPTION (pfile, out_fname) == NULL)
1479 CPP_OPTION (pfile, out_fname) = arg;
1482 cpp_fatal (pfile, "Output filename specified twice");
1487 /* Args to -d specify what parts of macros to dump.
1488 Silently ignore unrecognised options; they may
1489 be aimed at the compiler proper. */
1493 while ((c = *arg++) != '\0')
1497 CPP_OPTION (pfile, dump_macros) = dump_only;
1498 CPP_OPTION (pfile, no_output) = 1;
1501 CPP_OPTION (pfile, dump_macros) = dump_names;
1504 CPP_OPTION (pfile, dump_macros) = dump_definitions;
1507 CPP_OPTION (pfile, dump_includes) = 1;
1514 CPP_OPTION (pfile, print_deps_missing_files) = 1;
1517 CPP_OPTION (pfile, print_deps) = 2;
1520 CPP_OPTION (pfile, print_deps) = 1;
1523 CPP_OPTION (pfile, deps_file) = arg;
1526 CPP_OPTION (pfile, deps_phony_targets) = 1;
1530 /* Add a target. -MQ quotes for Make. */
1531 deps_add_target (pfile->deps, arg, opt_code == OPT_MQ);
1534 /* -MD and -MMD for cpp0 are deprecated and undocumented
1535 (use -M or -MM with -MF instead), and probably should be
1536 removed with the next major GCC version. For the moment
1537 we allow these for the benefit of Automake 1.4, which
1538 uses these when dependency tracking is enabled. Automake
1539 1.5 will fix this. */
1541 CPP_OPTION (pfile, print_deps) = 2;
1542 CPP_OPTION (pfile, deps_file) = arg;
1545 CPP_OPTION (pfile, print_deps) = 1;
1546 CPP_OPTION (pfile, deps_file) = arg;
1552 /* -A with an argument beginning with '-' acts as
1553 #unassert on whatever immediately follows the '-'.
1554 If "-" is the whole argument, we eliminate all
1555 predefined macros and assertions, including those
1556 that were specified earlier on the command line.
1557 That way we can get rid of any that were passed
1558 automatically in from GCC. */
1562 free_chain (pend->directive_head);
1563 pend->directive_head = NULL;
1564 pend->directive_tail = NULL;
1567 new_pending_directive (pend, arg + 1, cpp_unassert);
1570 new_pending_directive (pend, arg, cpp_assert);
1573 new_pending_directive (pend, arg, cpp_undef);
1575 case OPT_I: /* Add directory to path for includes. */
1576 if (!strcmp (arg, "-"))
1579 Use the preceding -I directories for #include "..."
1580 but not #include <...>.
1581 Don't search the directory of the present file
1582 for #include "...". (Note that -I. -I- is not the same as
1583 the default setup; -I. uses the compiler's working dir.) */
1584 if (! CPP_OPTION (pfile, ignore_srcdir))
1586 pend->quote_head = pend->brack_head;
1587 pend->quote_tail = pend->brack_tail;
1588 pend->brack_head = 0;
1589 pend->brack_tail = 0;
1590 CPP_OPTION (pfile, ignore_srcdir) = 1;
1594 cpp_fatal (pfile, "-I- specified twice");
1599 append_include_chain (pfile, xstrdup (arg), BRACKET, 0);
1602 /* Add directory to beginning of system include path, as a system
1603 include directory. */
1604 append_include_chain (pfile, xstrdup (arg), SYSTEM, 0);
1609 struct pending_option *o = (struct pending_option *)
1610 xmalloc (sizeof (struct pending_option));
1614 if (opt_code == OPT_include)
1615 APPEND (pend, include, o);
1617 APPEND (pend, imacros, o);
1620 case OPT_iwithprefix:
1621 /* Add directory to end of path for includes,
1622 with the default prefix at the front of its name. */
1624 case OPT_iwithprefixbefore:
1625 /* Add directory to main path for includes,
1626 with the default prefix at the front of its name. */
1633 if (CPP_OPTION (pfile, include_prefix) != 0)
1635 size_t ipl = CPP_OPTION (pfile, include_prefix_len);
1636 fname = xmalloc (ipl + len + 1);
1637 memcpy (fname, CPP_OPTION (pfile, include_prefix), ipl);
1638 memcpy (fname + ipl, arg, len + 1);
1640 else if (cpp_GCC_INCLUDE_DIR_len)
1642 fname = xmalloc (cpp_GCC_INCLUDE_DIR_len + len + 1);
1643 memcpy (fname, cpp_GCC_INCLUDE_DIR, cpp_GCC_INCLUDE_DIR_len);
1644 memcpy (fname + cpp_GCC_INCLUDE_DIR_len, arg, len + 1);
1647 fname = xstrdup (arg);
1649 append_include_chain (pfile, fname,
1650 opt_code == OPT_iwithprefix ? SYSTEM: BRACKET, 0);
1654 /* Add directory to end of path for includes. */
1655 append_include_chain (pfile, xstrdup (arg), AFTER, 0);
1658 /* Silently ignore unrecognised options. */
1659 if (!strcmp (argv[i], "-Wall"))
1661 CPP_OPTION (pfile, warn_trigraphs) = 1;
1662 CPP_OPTION (pfile, warn_comments) = 1;
1664 else if (!strcmp (argv[i], "-Wtraditional"))
1665 CPP_OPTION (pfile, warn_traditional) = 1;
1666 else if (!strcmp (argv[i], "-Wtrigraphs"))
1667 CPP_OPTION (pfile, warn_trigraphs) = 1;
1668 else if (!strcmp (argv[i], "-Wcomment"))
1669 CPP_OPTION (pfile, warn_comments) = 1;
1670 else if (!strcmp (argv[i], "-Wcomments"))
1671 CPP_OPTION (pfile, warn_comments) = 1;
1672 else if (!strcmp (argv[i], "-Wundef"))
1673 CPP_OPTION (pfile, warn_undef) = 1;
1674 else if (!strcmp (argv[i], "-Wimport"))
1675 CPP_OPTION (pfile, warn_import) = 1;
1676 else if (!strcmp (argv[i], "-Werror"))
1677 CPP_OPTION (pfile, warnings_are_errors) = 1;
1678 else if (!strcmp (argv[i], "-Wsystem-headers"))
1679 CPP_OPTION (pfile, warn_system_headers) = 1;
1680 else if (!strcmp (argv[i], "-Wno-traditional"))
1681 CPP_OPTION (pfile, warn_traditional) = 0;
1682 else if (!strcmp (argv[i], "-Wno-trigraphs"))
1683 CPP_OPTION (pfile, warn_trigraphs) = 0;
1684 else if (!strcmp (argv[i], "-Wno-comment"))
1685 CPP_OPTION (pfile, warn_comments) = 0;
1686 else if (!strcmp (argv[i], "-Wno-comments"))
1687 CPP_OPTION (pfile, warn_comments) = 0;
1688 else if (!strcmp (argv[i], "-Wno-undef"))
1689 CPP_OPTION (pfile, warn_undef) = 0;
1690 else if (!strcmp (argv[i], "-Wno-import"))
1691 CPP_OPTION (pfile, warn_import) = 0;
1692 else if (!strcmp (argv[i], "-Wno-error"))
1693 CPP_OPTION (pfile, warnings_are_errors) = 0;
1694 else if (!strcmp (argv[i], "-Wno-system-headers"))
1695 CPP_OPTION (pfile, warn_system_headers) = 0;
1702 /* Handle command-line options in (argc, argv).
1703 Can be called multiple times, to handle multiple sets of options.
1704 Returns if an unrecognized option is seen.
1705 Returns number of strings consumed. */
1707 cpp_handle_options (pfile, argc, argv)
1713 int strings_processed;
1715 for (i = 0; i < argc; i += strings_processed)
1717 strings_processed = cpp_handle_option (pfile, argc - i, argv + i);
1718 if (strings_processed == 0)
1725 /* Extra processing when all options are parsed, after all calls to
1726 cpp_handle_option[s]. Consistency checks etc. */
1728 cpp_post_options (pfile)
1731 if (pfile->print_version)
1733 fprintf (stderr, _("GNU CPP version %s (cpplib)"), version_string);
1734 #ifdef TARGET_VERSION
1737 fputc ('\n', stderr);
1740 /* Canonicalize in_fname and out_fname. We guarantee they are not
1741 NULL, and that the empty string represents stdin / stdout. */
1742 if (CPP_OPTION (pfile, in_fname) == NULL
1743 || !strcmp (CPP_OPTION (pfile, in_fname), "-"))
1744 CPP_OPTION (pfile, in_fname) = "";
1746 if (CPP_OPTION (pfile, out_fname) == NULL
1747 || !strcmp (CPP_OPTION (pfile, out_fname), "-"))
1748 CPP_OPTION (pfile, out_fname) = "";
1750 /* -Wtraditional is not useful in C++ mode. */
1751 if (CPP_OPTION (pfile, cplusplus))
1752 CPP_OPTION (pfile, warn_traditional) = 0;
1754 /* Set this if it hasn't been set already. */
1755 if (CPP_OPTION (pfile, user_label_prefix) == NULL)
1756 CPP_OPTION (pfile, user_label_prefix) = USER_LABEL_PREFIX;
1758 /* Permanently disable macro expansion if we are rescanning
1759 preprocessed text. */
1760 if (CPP_OPTION (pfile, preprocessed))
1761 pfile->state.prevent_expansion = 1;
1763 /* We need to do this after option processing and before
1764 cpp_start_read, as cppmain.c relies on the options->no_output to
1765 set its callbacks correctly before calling cpp_start_read. */
1766 init_dependency_output (pfile);
1768 /* After checking the environment variables, check if -M or -MM has
1769 not been specified, but other -M options have. */
1770 if (CPP_OPTION (pfile, print_deps) == 0 &&
1771 (CPP_OPTION (pfile, print_deps_missing_files)
1772 || CPP_OPTION (pfile, deps_file)
1773 || CPP_OPTION (pfile, deps_phony_targets)))
1774 cpp_fatal (pfile, "you must additionally specify either -M or -MM");
1777 /* Set up dependency-file output. */
1779 init_dependency_output (pfile)
1782 char *spec, *s, *output_file;
1784 /* Either of two environment variables can specify output of deps.
1785 Its value is either "OUTPUT_FILE" or "OUTPUT_FILE DEPS_TARGET",
1786 where OUTPUT_FILE is the file to write deps info to
1787 and DEPS_TARGET is the target to mention in the deps. */
1789 if (CPP_OPTION (pfile, print_deps) == 0)
1791 spec = getenv ("DEPENDENCIES_OUTPUT");
1793 CPP_OPTION (pfile, print_deps) = 1;
1796 spec = getenv ("SUNPRO_DEPENDENCIES");
1798 CPP_OPTION (pfile, print_deps) = 2;
1803 /* Find the space before the DEPS_TARGET, if there is one. */
1804 s = strchr (spec, ' ');
1807 /* Let the caller perform MAKE quoting. */
1808 deps_add_target (pfile->deps, s + 1, 0);
1809 output_file = (char *) xmalloc (s - spec + 1);
1810 memcpy (output_file, spec, s - spec);
1811 output_file[s - spec] = 0;
1816 /* Command line overrides environment variables. */
1817 if (CPP_OPTION (pfile, deps_file) == 0)
1818 CPP_OPTION (pfile, deps_file) = output_file;
1819 CPP_OPTION (pfile, print_deps_append) = 1;
1822 /* If dependencies go to standard output, or -MG is used, we should
1823 suppress output, including -dM, -dI etc. */
1824 if (CPP_OPTION (pfile, deps_file) == 0
1825 || CPP_OPTION (pfile, print_deps_missing_files))
1827 CPP_OPTION (pfile, no_output) = 1;
1828 CPP_OPTION (pfile, dump_macros) = 0;
1829 CPP_OPTION (pfile, dump_includes) = 0;
1836 fprintf (stderr, _("Usage: %s [switches] input output\n"), progname);
1837 /* To keep the lines from getting too long for some compilers, limit
1838 to about 500 characters (6 lines) per chunk. */
1841 -include <file> Include the contents of <file> before other files\n\
1842 -imacros <file> Accept definition of macros in <file>\n\
1843 -iprefix <path> Specify <path> as a prefix for next two options\n\
1844 -iwithprefix <dir> Add <dir> to the end of the system include path\n\
1845 -iwithprefixbefore <dir> Add <dir> to the end of the main include path\n\
1846 -isystem <dir> Add <dir> to the start of the system include path\n\
1849 -idirafter <dir> Add <dir> to the end of the system include path\n\
1850 -I <dir> Add <dir> to the end of the main include path\n\
1851 -I- Fine-grained include path control; see info docs\n\
1852 -nostdinc Do not search system include directories\n\
1853 (dirs specified with -isystem will still be used)\n\
1854 -nostdinc++ Do not search system include directories for C++\n\
1855 -o <file> Put output into <file>\n\
1858 -pedantic Issue all warnings demanded by strict ISO C\n\
1859 -pedantic-errors Issue -pedantic warnings as errors instead\n\
1860 -trigraphs Support ISO C trigraphs\n\
1861 -lang-c Assume that the input sources are in C\n\
1862 -lang-c89 Assume that the input sources are in C89\n\
1865 -lang-c++ Assume that the input sources are in C++\n\
1866 -lang-objc Assume that the input sources are in ObjectiveC\n\
1867 -lang-objc++ Assume that the input sources are in ObjectiveC++\n\
1868 -lang-asm Assume that the input sources are in assembler\n\
1871 -std=<std name> Specify the conformance standard; one of:\n\
1872 gnu89, gnu99, c89, c99, iso9899:1990,\n\
1873 iso9899:199409, iso9899:1999\n\
1874 -+ Allow parsing of C++ style features\n\
1875 -w Inhibit warning messages\n\
1876 -Wtrigraphs Warn if trigraphs are encountered\n\
1877 -Wno-trigraphs Do not warn about trigraphs\n\
1878 -Wcomment{s} Warn if one comment starts inside another\n\
1881 -Wno-comment{s} Do not warn about comments\n\
1882 -Wtraditional Warn about features not present in traditional C\n\
1883 -Wno-traditional Do not warn about traditional C\n\
1884 -Wundef Warn if an undefined macro is used by #if\n\
1885 -Wno-undef Do not warn about testing undefined macros\n\
1886 -Wimport Warn about the use of the #import directive\n\
1889 -Wno-import Do not warn about the use of #import\n\
1890 -Werror Treat all warnings as errors\n\
1891 -Wno-error Do not treat warnings as errors\n\
1892 -Wsystem-headers Do not suppress warnings from system headers\n\
1893 -Wno-system-headers Suppress warnings from system headers\n\
1894 -Wall Enable all preprocessor warnings\n\
1897 -M Generate make dependencies\n\
1898 -MM As -M, but ignore system header files\n\
1899 -MF <file> Write dependency output to the given file\n\
1900 -MG Treat missing header file as generated files\n\
1903 -MP Generate phony targets for all headers\n\
1904 -MQ <target> Add a MAKE-quoted target\n\
1905 -MT <target> Add an unquoted target\n\
1908 -D<macro> Define a <macro> with string '1' as its value\n\
1909 -D<macro>=<val> Define a <macro> with <val> as its value\n\
1910 -A<question> (<answer>) Assert the <answer> to <question>\n\
1911 -A-<question> (<answer>) Disable the <answer> to <question>\n\
1912 -U<macro> Undefine <macro> \n\
1913 -v Display the version number\n\
1916 -H Print the name of header files as they are used\n\
1917 -C Do not discard comments\n\
1918 -dM Display a list of macro definitions active at end\n\
1919 -dD Preserve macro definitions in output\n\
1920 -dN As -dD except that only the names are preserved\n\
1921 -dI Include #include directives in the output\n\
1924 -fpreprocessed Treat the input file as already preprocessed\n\
1925 -ftabstop=<number> Distance between tab stops for column reporting\n\
1926 -P Do not generate #line directives\n\
1927 -$ Do not allow '$' in identifiers\n\
1928 -remap Remap file names when including files.\n\
1929 --version Display version information\n\
1930 -h or --help Display this information\n\