2 Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002 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. */
30 #include "cppdefault.h"
32 /* Predefined symbols, built-in macros, and the default include path. */
34 #ifndef GET_ENV_PATH_LIST
35 #define GET_ENV_PATH_LIST(VAR,NAME) do { (VAR) = getenv (NAME); } while (0)
38 /* Windows does not natively support inodes, and neither does MSDOS.
39 Cygwin's emulation can generate non-unique inodes, so don't use it.
40 VMS has non-numeric inodes. */
42 # define INO_T_EQ(A, B) (!memcmp (&(A), &(B), sizeof (A)))
43 # define INO_T_COPY(DEST, SRC) memcpy(&(DEST), &(SRC), sizeof (SRC))
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))
50 # define INO_T_COPY(DEST, SRC) (DEST) = (SRC)
53 /* Internal structures and prototypes. */
55 /* 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_read_main_file. 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 read_original_filename PARAMS ((cpp_reader *));
115 static void new_pending_directive PARAMS ((struct cpp_pending *,
117 cl_directive_handler));
118 static void output_deps PARAMS ((cpp_reader *));
119 static int parse_option PARAMS ((const char *));
121 /* Fourth argument to append_include_chain: chain to use.
122 Note it's never asked to append to the quote chain. */
123 enum { BRACKET = 0, SYSTEM, AFTER };
125 /* If we have designated initializers (GCC >2.7) these tables can be
126 initialized, constant data. Otherwise, they have to be filled in at
128 #if HAVE_DESIGNATED_INITIALIZERS
130 #define init_trigraph_map() /* Nothing. */
131 #define TRIGRAPH_MAP \
132 __extension__ const U_CHAR _cpp_trigraph_map[UCHAR_MAX + 1] = {
135 #define s(p, v) [p] = v,
139 #define TRIGRAPH_MAP U_CHAR _cpp_trigraph_map[UCHAR_MAX + 1] = { 0 }; \
140 static void init_trigraph_map PARAMS ((void)) { \
141 unsigned char *x = _cpp_trigraph_map;
144 #define s(p, v) x[p] = v;
149 s('=', '#') s(')', ']') s('!', '|')
150 s('(', '[') s('\'', '^') s('>', '}')
151 s('/', '\\') s('<', '{') s('-', '~')
158 /* Given a colon-separated list of file names PATH,
159 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. CXX_AWARE
202 is non-zero if the header contains extern "C" guards for C++,
203 otherwise it is zero. */
205 append_include_chain (pfile, dir, path, cxx_aware)
209 int cxx_aware ATTRIBUTE_UNUSED;
211 struct cpp_pending *pend = CPP_OPTION (pfile, pending);
212 struct search_path *new;
221 _cpp_simplify_pathname (dir);
225 /* Dirs that don't exist are silently ignored. */
227 cpp_notice_from_errno (pfile, dir);
228 else if (CPP_OPTION (pfile, verbose))
229 fprintf (stderr, _("ignoring nonexistent directory \"%s\"\n"), dir);
234 if (!S_ISDIR (st.st_mode))
236 cpp_notice (pfile, "%s: Not a directory", dir);
242 if (len > pfile->max_include_len)
243 pfile->max_include_len = len;
245 new = (struct search_path *) xmalloc (sizeof (struct search_path));
248 INO_T_COPY (new->ino, st.st_ino);
249 new->dev = st.st_dev;
250 /* Both systm and after include file lists should be treated as system
251 include files since these two lists are really just a concatenation
252 of one "system" list. */
253 if (path == SYSTEM || path == AFTER)
254 #ifdef NO_IMPLICIT_EXTERN_C
257 new->sysp = cxx_aware ? 1 : 2;
261 new->name_map = NULL;
266 case BRACKET: APPEND (pend, brack, new); break;
267 case SYSTEM: APPEND (pend, systm, new); break;
268 case AFTER: APPEND (pend, after, new); break;
272 /* Handle a duplicated include path. PREV is the link in the chain
273 before the duplicate. The duplicate is removed from the chain and
274 freed. Returns PREV. */
275 static struct search_path *
276 remove_dup_dir (pfile, prev)
278 struct search_path *prev;
280 struct search_path *cur = prev->next;
282 if (CPP_OPTION (pfile, verbose))
283 fprintf (stderr, _("ignoring duplicate directory \"%s\"\n"), cur->name);
285 prev->next = cur->next;
286 free ((PTR) cur->name);
292 /* Remove duplicate directories from a chain. Returns the tail of the
293 chain, or NULL if the chain is empty. This algorithm is quadratic
294 in the number of -I switches, which is acceptable since there
295 aren't usually that many of them. */
296 static struct search_path *
297 remove_dup_dirs (pfile, head)
299 struct search_path *head;
301 struct search_path *prev = NULL, *cur, *other;
303 for (cur = head; cur; cur = cur->next)
305 for (other = head; other != cur; other = other->next)
306 if (INO_T_EQ (cur->ino, other->ino) && cur->dev == other->dev)
308 if (cur->sysp && !other->sysp)
311 "changing search order for system directory \"%s\"",
313 if (strcmp (cur->name, other->name))
315 " as it is the same as non-system directory \"%s\"",
319 " as it has already been specified as a non-system directory");
321 cur = remove_dup_dir (pfile, prev);
330 /* Merge the four include chains together in the order quote, bracket,
331 system, after. Remove duplicate dirs (as determined by
332 INO_T_EQ()). The system_include and after_include chains are never
333 referred to again after this function; all access is through the
334 bracket_include path. */
336 merge_include_chains (pfile)
339 struct search_path *quote, *brack, *systm, *qtail;
341 struct cpp_pending *pend = CPP_OPTION (pfile, pending);
343 quote = pend->quote_head;
344 brack = pend->brack_head;
345 systm = pend->systm_head;
346 qtail = pend->quote_tail;
348 /* Paste together bracket, system, and after include chains. */
350 pend->systm_tail->next = pend->after_head;
352 systm = pend->after_head;
355 pend->brack_tail->next = systm;
359 /* This is a bit tricky. First we drop dupes from the quote-include
360 list. Then we drop dupes from the bracket-include list.
361 Finally, if qtail and brack are the same directory, we cut out
362 brack and move brack up to point to qtail.
364 We can't just merge the lists and then uniquify them because
365 then we may lose directories from the <> search path that should
366 be there; consider -Ifoo -Ibar -I- -Ifoo -Iquux. It is however
367 safe to treat -Ibar -Ifoo -I- -Ifoo -Iquux as if written
368 -Ibar -I- -Ifoo -Iquux. */
370 remove_dup_dirs (pfile, brack);
371 qtail = remove_dup_dirs (pfile, quote);
377 /* If brack == qtail, remove brack as it's simpler. */
378 if (INO_T_EQ (qtail->ino, brack->ino) && qtail->dev == brack->dev)
379 brack = remove_dup_dir (pfile, qtail);
384 CPP_OPTION (pfile, quote_include) = quote;
385 CPP_OPTION (pfile, bracket_include) = brack;
388 /* A set of booleans indicating what CPP features each source language
395 char extended_numbers;
397 char dollars_in_ident;
398 char cplusplus_comments;
402 /* ??? Enable $ in identifiers in assembly? */
403 static const struct lang_flags lang_defaults[] =
404 { /* c99 objc c++ xnum trig dollar c++comm digr */
405 /* GNUC89 */ { 0, 0, 0, 1, 0, 1, 1, 1 },
406 /* GNUC99 */ { 1, 0, 0, 1, 0, 1, 1, 1 },
407 /* STDC89 */ { 0, 0, 0, 0, 1, 0, 0, 0 },
408 /* STDC94 */ { 0, 0, 0, 0, 1, 0, 0, 1 },
409 /* STDC99 */ { 1, 0, 0, 1, 1, 0, 1, 1 },
410 /* GNUCXX */ { 0, 0, 1, 1, 0, 1, 1, 1 },
411 /* CXX98 */ { 0, 0, 1, 1, 1, 0, 1, 1 },
412 /* OBJC */ { 0, 1, 0, 1, 0, 1, 1, 1 },
413 /* OBJCXX */ { 0, 1, 1, 1, 0, 1, 1, 1 },
414 /* ASM */ { 0, 0, 0, 1, 0, 0, 1, 0 }
417 /* Sets internal flags correctly for a given language. */
419 set_lang (pfile, lang)
423 const struct lang_flags *l = &lang_defaults[(int) lang];
425 CPP_OPTION (pfile, lang) = lang;
427 CPP_OPTION (pfile, c99) = l->c99;
428 CPP_OPTION (pfile, objc) = l->objc;
429 CPP_OPTION (pfile, cplusplus) = l->cplusplus;
430 CPP_OPTION (pfile, extended_numbers) = l->extended_numbers;
431 CPP_OPTION (pfile, trigraphs) = l->trigraphs;
432 CPP_OPTION (pfile, dollars_in_ident) = l->dollars_in_ident;
433 CPP_OPTION (pfile, cplusplus_comments) = l->cplusplus_comments;
434 CPP_OPTION (pfile, digraphs) = l->digraphs;
438 static int opt_comp PARAMS ((const void *, const void *));
440 /* Run-time sorting of options array. */
445 return strcmp (((struct cl_option *) p1)->opt_text,
446 ((struct cl_option *) p2)->opt_text);
450 /* init initializes library global state. It might not need to
451 do anything depending on the platform and compiler. */
455 static int initialized = 0;
462 /* For non-ASCII hosts, the cl_options array needs to be sorted at
464 qsort (cl_options, N_OPTS, sizeof (struct cl_option), opt_comp);
467 /* Set up the trigraph map. This doesn't need to do anything if
468 we were compiled with a compiler that supports C99 designated
470 init_trigraph_map ();
474 /* Initialize a cpp_reader structure. */
476 cpp_create_reader (lang)
481 /* Initialise this instance of the library if it hasn't been already. */
484 pfile = (cpp_reader *) xcalloc (1, sizeof (cpp_reader));
486 set_lang (pfile, lang);
487 CPP_OPTION (pfile, warn_import) = 1;
488 CPP_OPTION (pfile, discard_comments) = 1;
489 CPP_OPTION (pfile, show_column) = 1;
490 CPP_OPTION (pfile, tabstop) = 8;
491 CPP_OPTION (pfile, operator_names) = 1;
493 CPP_OPTION (pfile, pending) =
494 (struct cpp_pending *) xcalloc (1, sizeof (struct cpp_pending));
496 /* It's simplest to just create this struct whether or not it will
498 pfile->deps = deps_init ();
500 /* Initialise the line map. Start at logical line 1, so we can use
501 a line number of zero for special states. */
502 init_line_maps (&pfile->line_maps);
505 /* Initialize lexer state. */
506 pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments);
508 /* Set up static tokens. */
509 pfile->date.type = CPP_EOF;
510 pfile->avoid_paste.type = CPP_PADDING;
511 pfile->avoid_paste.val.source = NULL;
512 pfile->eof.type = CPP_EOF;
513 pfile->eof.flags = 0;
515 /* Create a token buffer for the lexer. */
516 _cpp_init_tokenrun (&pfile->base_run, 250);
517 pfile->cur_run = &pfile->base_run;
518 pfile->cur_token = pfile->base_run.base;
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 /* Aligned and unaligned storage. */
526 pfile->a_buff = _cpp_get_buff (pfile, 0);
527 pfile->u_buff = _cpp_get_buff (pfile, 0);
529 /* Initialise the buffer obstack. */
530 gcc_obstack_init (&pfile->buffer_ob);
532 _cpp_init_includes (pfile);
537 /* Free resources used by PFILE. Accessing PFILE after this function
538 returns leads to undefined behaviour. Returns the error count. */
544 struct search_path *dir, *dirn;
545 cpp_context *context, *contextn;
546 tokenrun *run, *runn;
548 while (CPP_BUFFER (pfile) != NULL)
549 _cpp_pop_buffer (pfile);
551 if (pfile->macro_buffer)
553 free ((PTR) pfile->macro_buffer);
554 pfile->macro_buffer = NULL;
555 pfile->macro_buffer_len = 0;
558 deps_free (pfile->deps);
559 obstack_free (&pfile->buffer_ob, 0);
561 _cpp_destroy_hashtable (pfile);
562 _cpp_cleanup_includes (pfile);
564 _cpp_free_buff (pfile->a_buff);
565 _cpp_free_buff (pfile->u_buff);
566 _cpp_free_buff (pfile->free_buffs);
568 for (run = &pfile->base_run; run; run = runn)
572 if (run != &pfile->base_run)
576 for (dir = CPP_OPTION (pfile, quote_include); dir; dir = dirn)
579 free ((PTR) dir->name);
583 for (context = pfile->base_context.next; context; context = contextn)
585 contextn = context->next;
589 free_line_maps (&pfile->line_maps);
591 result = pfile->errors;
598 /* This structure defines one built-in identifier. A node will be
599 entered in the hash table under the name NAME, with value VALUE (if
600 any). If flags has OPERATOR, the node's operator field is used; if
601 flags has BUILTIN the node's builtin field is used. Macros that are
602 known at build time should not be flagged BUILTIN, as then they do
603 not appear in macro dumps with e.g. -dM or -dD.
605 Two values are not compile time constants, so we tag
606 them in the FLAGS field instead:
607 VERS value is the global version_string, quoted
608 ULP value is the global user_label_prefix
610 Also, macros with CPLUS set in the flags field are entered only for C++. */
615 unsigned char builtin;
616 unsigned char operator;
617 unsigned short flags;
624 #define OPERATOR 0x10
626 #define B(n, t) { U n, 0, t, 0, BUILTIN, sizeof n - 1 }
627 #define C(n, v) { U n, v, 0, 0, 0, sizeof n - 1 }
628 #define X(n, f) { U n, 0, 0, 0, f, sizeof n - 1 }
629 #define O(n, c, f) { U n, 0, 0, c, OPERATOR | f, sizeof n - 1 }
630 static const struct builtin builtin_array[] =
632 B("__TIME__", BT_TIME),
633 B("__DATE__", BT_DATE),
634 B("__FILE__", BT_FILE),
635 B("__BASE_FILE__", BT_BASE_FILE),
636 B("__LINE__", BT_SPECLINE),
637 B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL),
638 B("_Pragma", BT_PRAGMA),
640 X("__VERSION__", VERS),
641 X("__USER_LABEL_PREFIX__", ULP),
642 C("__REGISTER_PREFIX__", REGISTER_PREFIX),
643 C("__HAVE_BUILTIN_SETJMP__", "1"),
644 #ifndef NO_BUILTIN_SIZE_TYPE
645 C("__SIZE_TYPE__", SIZE_TYPE),
647 #ifndef NO_BUILTIN_PTRDIFF_TYPE
648 C("__PTRDIFF_TYPE__", PTRDIFF_TYPE),
650 #ifndef NO_BUILTIN_WCHAR_TYPE
651 C("__WCHAR_TYPE__", WCHAR_TYPE),
653 #ifndef NO_BUILTIN_WINT_TYPE
654 C("__WINT_TYPE__", WINT_TYPE),
656 #ifdef STDC_0_IN_SYSTEM_HEADERS
657 B("__STDC__", BT_STDC),
662 /* Named operators known to the preprocessor. These cannot be #defined
663 and always have their stated meaning. They are treated like normal
664 identifiers except for the type code and the meaning. Most of them
665 are only for C++ (but see iso646.h). */
666 O("and", CPP_AND_AND, CPLUS),
667 O("and_eq", CPP_AND_EQ, CPLUS),
668 O("bitand", CPP_AND, CPLUS),
669 O("bitor", CPP_OR, CPLUS),
670 O("compl", CPP_COMPL, CPLUS),
671 O("not", CPP_NOT, CPLUS),
672 O("not_eq", CPP_NOT_EQ, CPLUS),
673 O("or", CPP_OR_OR, CPLUS),
674 O("or_eq", CPP_OR_EQ, CPLUS),
675 O("xor", CPP_XOR, CPLUS),
676 O("xor_eq", CPP_XOR_EQ, CPLUS)
682 #define builtin_array_end \
683 builtin_array + sizeof(builtin_array)/sizeof(struct builtin)
685 /* Subroutine of cpp_read_main_file; reads the builtins table above and
686 enters them, and language-specific macros, into the hash table. */
688 init_builtins (pfile)
691 const struct builtin *b;
693 for(b = builtin_array; b < builtin_array_end; b++)
695 if ((b->flags & CPLUS) && ! CPP_OPTION (pfile, cplusplus))
698 if ((b->flags & OPERATOR) && ! CPP_OPTION (pfile, operator_names))
701 if (b->flags & (OPERATOR | BUILTIN))
703 cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len);
704 if (b->flags & OPERATOR)
706 hp->flags |= NODE_OPERATOR;
707 hp->value.operator = b->operator;
712 hp->flags |= NODE_BUILTIN | NODE_WARN;
713 hp->value.builtin = b->builtin;
716 else /* A standard macro of some kind. */
723 /* Allocate enough space for 'name "value"\n\0'. */
724 str = alloca (b->len + strlen (version_string) + 5);
725 sprintf (str, "%s \"%s\"\n", b->name, version_string);
730 val = CPP_OPTION (pfile, user_label_prefix);
734 /* Allocate enough space for "name value\n\0". */
735 str = alloca (b->len + strlen (val) + 3);
736 sprintf(str, "%s %s\n", b->name, val);
739 _cpp_define_builtin (pfile, str);
743 if (CPP_OPTION (pfile, cplusplus))
745 _cpp_define_builtin (pfile, "__cplusplus 1");
746 if (SUPPORTS_ONE_ONLY)
747 _cpp_define_builtin (pfile, "__GXX_WEAK__ 1");
749 _cpp_define_builtin (pfile, "__GXX_WEAK__ 0");
751 if (CPP_OPTION (pfile, objc))
752 _cpp_define_builtin (pfile, "__OBJC__ 1");
754 if (CPP_OPTION (pfile, lang) == CLK_STDC94)
755 _cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L");
756 else if (CPP_OPTION (pfile, c99))
757 _cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L");
759 if (CPP_OPTION (pfile, lang) == CLK_STDC89
760 || CPP_OPTION (pfile, lang) == CLK_STDC94
761 || CPP_OPTION (pfile, lang) == CLK_STDC99)
762 _cpp_define_builtin (pfile, "__STRICT_ANSI__ 1");
763 else if (CPP_OPTION (pfile, lang) == CLK_ASM)
764 _cpp_define_builtin (pfile, "__ASSEMBLER__ 1");
771 #undef builtin_array_end
773 /* And another subroutine. This one sets up the standard include path. */
775 init_standard_includes (pfile)
779 const struct default_include *p;
780 const char *specd_prefix = CPP_OPTION (pfile, include_prefix);
782 /* Several environment variables may add to the include search path.
783 CPATH specifies an additional list of directories to be searched
784 as if specified with -I, while C_INCLUDE_PATH, CPLUS_INCLUDE_PATH,
785 etc. specify an additional list of directories to be searched as
786 if specified with -isystem, for the language indicated. */
788 GET_ENV_PATH_LIST (path, "CPATH");
789 if (path != 0 && *path != 0)
790 path_include (pfile, path, BRACKET);
792 switch ((CPP_OPTION (pfile, objc) << 1) + CPP_OPTION (pfile, cplusplus))
795 GET_ENV_PATH_LIST (path, "C_INCLUDE_PATH");
798 GET_ENV_PATH_LIST (path, "CPLUS_INCLUDE_PATH");
801 GET_ENV_PATH_LIST (path, "OBJC_INCLUDE_PATH");
804 GET_ENV_PATH_LIST (path, "OBJCPLUS_INCLUDE_PATH");
807 if (path != 0 && *path != 0)
808 path_include (pfile, path, SYSTEM);
810 /* Search "translated" versions of GNU directories.
811 These have /usr/local/lib/gcc... replaced by specd_prefix. */
812 if (specd_prefix != 0 && cpp_GCC_INCLUDE_DIR_len)
814 /* Remove the `include' from /usr/local/lib/gcc.../include.
815 GCC_INCLUDE_DIR will always end in /include. */
816 int default_len = cpp_GCC_INCLUDE_DIR_len;
817 char *default_prefix = (char *) alloca (default_len + 1);
818 int specd_len = strlen (specd_prefix);
820 memcpy (default_prefix, cpp_GCC_INCLUDE_DIR, default_len);
821 default_prefix[default_len] = '\0';
823 for (p = cpp_include_defaults; p->fname; p++)
825 /* Some standard dirs are only for C++. */
827 || (CPP_OPTION (pfile, cplusplus)
828 && !CPP_OPTION (pfile, no_standard_cplusplus_includes)))
830 /* Does this dir start with the prefix? */
831 if (!memcmp (p->fname, default_prefix, default_len))
833 /* Yes; change prefix and add to search list. */
834 int flen = strlen (p->fname);
835 int this_len = specd_len + flen - default_len;
836 char *str = (char *) xmalloc (this_len + 1);
837 memcpy (str, specd_prefix, specd_len);
838 memcpy (str + specd_len,
839 p->fname + default_len,
840 flen - default_len + 1);
842 append_include_chain (pfile, str, SYSTEM, p->cxx_aware);
848 /* Search ordinary names for GNU include directories. */
849 for (p = cpp_include_defaults; p->fname; p++)
851 /* Some standard dirs are only for C++. */
853 || (CPP_OPTION (pfile, cplusplus)
854 && !CPP_OPTION (pfile, no_standard_cplusplus_includes)))
856 char *str = update_path (p->fname, p->component);
857 append_include_chain (pfile, str, SYSTEM, p->cxx_aware);
862 /* Pushes a command line -imacro and -include file indicated by P onto
863 the buffer stack. Returns non-zero if successful. */
865 push_include (pfile, p)
867 struct pending_option *p;
871 /* Later: maybe update this to use the #include "" search path
872 if cpp_read_file fails. */
873 header.type = CPP_STRING;
874 header.val.str.text = (const unsigned char *) p->arg;
875 header.val.str.len = strlen (p->arg);
876 /* Make the command line directive take up a line. */
879 return _cpp_execute_include (pfile, &header, IT_CMDLINE);
882 /* Frees a pending_option chain. */
885 struct pending_option *head;
887 struct pending_option *next;
897 /* This is called after options have been parsed, and partially
898 processed. Setup for processing input from the file named FNAME,
899 or stdin if it is the empty string. Return the original filename
900 on success (e.g. foo.i->foo.c), or NULL on failure. */
902 cpp_read_main_file (pfile, fname, table)
907 /* The front ends don't set up the hash table until they have
908 finished processing the command line options, so initializing the
909 hashtable is deferred until now. */
910 _cpp_init_hashtable (pfile, table);
912 /* Set up the include search path now. */
913 if (! CPP_OPTION (pfile, no_standard_includes))
914 init_standard_includes (pfile);
916 merge_include_chains (pfile);
918 /* With -v, print the list of dirs to search. */
919 if (CPP_OPTION (pfile, verbose))
921 struct search_path *l;
922 fprintf (stderr, _("#include \"...\" search starts here:\n"));
923 for (l = CPP_OPTION (pfile, quote_include); l; l = l->next)
925 if (l == CPP_OPTION (pfile, bracket_include))
926 fprintf (stderr, _("#include <...> search starts here:\n"));
927 fprintf (stderr, " %s\n", l->name);
929 fprintf (stderr, _("End of search list.\n"));
932 if (CPP_OPTION (pfile, print_deps))
933 /* Set the default target (if there is none already). */
934 deps_add_default_target (pfile->deps, fname);
936 /* Open the main input file. */
937 if (!_cpp_read_file (pfile, fname))
940 /* Set this after cpp_post_options so the client can change the
941 option if it wishes, and after stacking the main file so we don't
942 trace the main file. */
943 pfile->line_maps.trace_includes = CPP_OPTION (pfile, print_include_names);
945 /* For foo.i, read the original filename foo.c now, for the benefit
946 of the front ends. */
947 if (CPP_OPTION (pfile, preprocessed))
948 read_original_filename (pfile);
950 return pfile->map->to_file;
953 /* For preprocessed files, if the first tokens are of the form # NUM.
954 handle the directive so we know the original file name. This will
955 generate file_change callbacks, which the front ends must handle
956 appropriately given their state of initialization. */
958 read_original_filename (pfile)
961 const cpp_token *token, *token1;
963 /* Lex ahead; if the first tokens are of the form # NUM, then
964 process the directive, otherwise back up. */
965 token = _cpp_lex_direct (pfile);
966 if (token->type == CPP_HASH)
968 token1 = _cpp_lex_direct (pfile);
969 _cpp_backup_tokens (pfile, 1);
971 /* If it's a #line directive, handle it. */
972 if (token1->type == CPP_NUMBER)
974 _cpp_handle_directive (pfile, token->flags & PREV_WHITE);
979 /* Backup as if nothing happened. */
980 _cpp_backup_tokens (pfile, 1);
983 /* Handle pending command line options: -D, -U, -A, -imacros and
984 -include. This should be called after debugging has been properly
985 set up in the front ends. */
987 cpp_finish_options (pfile)
990 /* Install builtins and process command line macros etc. in the order
991 they appeared, but only if not already preprocessed. */
992 if (! CPP_OPTION (pfile, preprocessed))
994 struct pending_option *p;
996 _cpp_do_file_change (pfile, LC_RENAME, _("<built-in>"), 1, 0);
997 init_builtins (pfile);
998 _cpp_do_file_change (pfile, LC_RENAME, _("<command line>"), 1, 0);
999 for (p = CPP_OPTION (pfile, pending)->directive_head; p; p = p->next)
1000 (*p->handler) (pfile, p->arg);
1002 /* Scan -imacros files after command line defines, but before
1003 files given with -include. */
1004 while ((p = CPP_OPTION (pfile, pending)->imacros_head) != NULL)
1006 if (push_include (pfile, p))
1008 pfile->buffer->return_at_eof = true;
1009 cpp_scan_nooutput (pfile);
1011 CPP_OPTION (pfile, pending)->imacros_head = p->next;
1016 free_chain (CPP_OPTION (pfile, pending)->directive_head);
1017 _cpp_push_next_buffer (pfile);
1020 /* Called to push the next buffer on the stack given by -include. If
1021 there are none, free the pending structure and restore the line map
1022 for the main file. */
1024 _cpp_push_next_buffer (pfile)
1027 bool pushed = false;
1029 /* This is't pretty; we'd rather not be relying on this as a boolean
1030 for reverting the line map. Further, we only free the chains in
1031 this conditional, so an early call to cpp_finish / cpp_destroy
1032 will leak that memory. */
1033 if (CPP_OPTION (pfile, pending)
1034 && CPP_OPTION (pfile, pending)->imacros_head == NULL)
1038 struct pending_option *p = CPP_OPTION (pfile, pending)->include_head;
1042 if (! CPP_OPTION (pfile, preprocessed))
1043 pushed = push_include (pfile, p);
1044 CPP_OPTION (pfile, pending)->include_head = p->next;
1050 free (CPP_OPTION (pfile, pending));
1051 CPP_OPTION (pfile, pending) = NULL;
1053 /* Restore the line map for the main file. */
1054 if (! CPP_OPTION (pfile, preprocessed))
1055 _cpp_do_file_change (pfile, LC_RENAME,
1056 pfile->line_maps.maps[0].to_file, 1, 0);
1063 /* Use mkdeps.c to output dependency information. */
1068 /* Stream on which to print the dependency information. */
1069 FILE *deps_stream = 0;
1070 const char *const deps_mode =
1071 CPP_OPTION (pfile, print_deps_append) ? "a" : "w";
1073 if (CPP_OPTION (pfile, deps_file) == 0)
1074 deps_stream = stdout;
1077 deps_stream = fopen (CPP_OPTION (pfile, deps_file), deps_mode);
1078 if (deps_stream == 0)
1080 cpp_notice_from_errno (pfile, CPP_OPTION (pfile, deps_file));
1085 deps_write (pfile->deps, deps_stream, 72);
1087 if (CPP_OPTION (pfile, deps_phony_targets))
1088 deps_phony_targets (pfile->deps, deps_stream);
1090 /* Don't close stdout. */
1091 if (CPP_OPTION (pfile, deps_file))
1093 if (ferror (deps_stream) || fclose (deps_stream) != 0)
1094 cpp_fatal (pfile, "I/O error on output");
1098 /* This is called at the end of preprocessing. It pops the
1099 last buffer and writes dependency output. It should also
1100 clear macro definitions, such that you could call cpp_start_read
1101 with a new filename to restart processing. */
1106 /* cpplex.c leaves the final buffer on the stack. This it so that
1107 it returns an unending stream of CPP_EOFs to the client. If we
1108 popped the buffer, we'd dereference a NULL buffer pointer and
1109 segfault. It's nice to allow the client to do worry-free excess
1110 cpp_get_token calls. */
1111 while (pfile->buffer)
1112 _cpp_pop_buffer (pfile);
1114 /* Don't write the deps file if preprocessing has failed. */
1115 if (CPP_OPTION (pfile, print_deps) && pfile->errors == 0)
1116 output_deps (pfile);
1118 /* Report on headers that could use multiple include guards. */
1119 if (CPP_OPTION (pfile, print_include_names))
1120 _cpp_report_missing_guards (pfile);
1123 /* Add a directive to be handled later in the initialization phase. */
1125 new_pending_directive (pend, text, handler)
1126 struct cpp_pending *pend;
1128 cl_directive_handler handler;
1130 struct pending_option *o = (struct pending_option *)
1131 xmalloc (sizeof (struct pending_option));
1135 o->handler = handler;
1136 APPEND (pend, directive, o);
1139 /* Irix6 "cc -n32" and OSF4 cc have problems with char foo[] = ("string");
1140 I.e. a const string initializer with parens around it. That is
1141 what N_("string") resolves to, so we make no_* be macros instead. */
1142 #define no_arg N_("argument missing after %s")
1143 #define no_ass N_("assertion missing after %s")
1144 #define no_dir N_("directory name missing after %s")
1145 #define no_fil N_("file name missing after %s")
1146 #define no_mac N_("macro name missing after %s")
1147 #define no_pth N_("path name missing after %s")
1148 #define no_num N_("number missing after %s")
1149 #define no_tgt N_("target missing after %s")
1151 /* This is the list of all command line options, with the leading
1152 "-" removed. It must be sorted in ASCII collating order. */
1153 #define COMMAND_LINE_OPTIONS \
1154 DEF_OPT("$", 0, OPT_dollar) \
1155 DEF_OPT("+", 0, OPT_plus) \
1156 DEF_OPT("-help", 0, OPT__help) \
1157 DEF_OPT("-target-help", 0, OPT_target__help) \
1158 DEF_OPT("-version", 0, OPT__version) \
1159 DEF_OPT("A", no_ass, OPT_A) \
1160 DEF_OPT("C", 0, OPT_C) \
1161 DEF_OPT("D", no_mac, OPT_D) \
1162 DEF_OPT("H", 0, OPT_H) \
1163 DEF_OPT("I", no_dir, OPT_I) \
1164 DEF_OPT("M", 0, OPT_M) \
1165 DEF_OPT("MD", no_fil, OPT_MD) \
1166 DEF_OPT("MF", no_fil, OPT_MF) \
1167 DEF_OPT("MG", 0, OPT_MG) \
1168 DEF_OPT("MM", 0, OPT_MM) \
1169 DEF_OPT("MMD", no_fil, OPT_MMD) \
1170 DEF_OPT("MP", 0, OPT_MP) \
1171 DEF_OPT("MQ", no_tgt, OPT_MQ) \
1172 DEF_OPT("MT", no_tgt, OPT_MT) \
1173 DEF_OPT("P", 0, OPT_P) \
1174 DEF_OPT("U", no_mac, OPT_U) \
1175 DEF_OPT("W", no_arg, OPT_W) /* arg optional */ \
1176 DEF_OPT("d", no_arg, OPT_d) \
1177 DEF_OPT("fleading-underscore", 0, OPT_fleading_underscore) \
1178 DEF_OPT("fno-leading-underscore", 0, OPT_fno_leading_underscore) \
1179 DEF_OPT("fno-operator-names", 0, OPT_fno_operator_names) \
1180 DEF_OPT("fno-preprocessed", 0, OPT_fno_preprocessed) \
1181 DEF_OPT("fno-show-column", 0, OPT_fno_show_column) \
1182 DEF_OPT("fpreprocessed", 0, OPT_fpreprocessed) \
1183 DEF_OPT("fshow-column", 0, OPT_fshow_column) \
1184 DEF_OPT("ftabstop=", no_num, OPT_ftabstop) \
1185 DEF_OPT("h", 0, OPT_h) \
1186 DEF_OPT("idirafter", no_dir, OPT_idirafter) \
1187 DEF_OPT("imacros", no_fil, OPT_imacros) \
1188 DEF_OPT("include", no_fil, OPT_include) \
1189 DEF_OPT("iprefix", no_pth, OPT_iprefix) \
1190 DEF_OPT("isystem", no_dir, OPT_isystem) \
1191 DEF_OPT("iwithprefix", no_dir, OPT_iwithprefix) \
1192 DEF_OPT("iwithprefixbefore", no_dir, OPT_iwithprefixbefore) \
1193 DEF_OPT("lang-asm", 0, OPT_lang_asm) \
1194 DEF_OPT("lang-c", 0, OPT_lang_c) \
1195 DEF_OPT("lang-c++", 0, OPT_lang_cplusplus) \
1196 DEF_OPT("lang-c89", 0, OPT_lang_c89) \
1197 DEF_OPT("lang-objc", 0, OPT_lang_objc) \
1198 DEF_OPT("lang-objc++", 0, OPT_lang_objcplusplus) \
1199 DEF_OPT("nostdinc", 0, OPT_nostdinc) \
1200 DEF_OPT("nostdinc++", 0, OPT_nostdincplusplus) \
1201 DEF_OPT("o", no_fil, OPT_o) \
1202 DEF_OPT("pedantic", 0, OPT_pedantic) \
1203 DEF_OPT("pedantic-errors", 0, OPT_pedantic_errors) \
1204 DEF_OPT("remap", 0, OPT_remap) \
1205 DEF_OPT("std=c++98", 0, OPT_std_cplusplus98) \
1206 DEF_OPT("std=c89", 0, OPT_std_c89) \
1207 DEF_OPT("std=c99", 0, OPT_std_c99) \
1208 DEF_OPT("std=c9x", 0, OPT_std_c9x) \
1209 DEF_OPT("std=gnu89", 0, OPT_std_gnu89) \
1210 DEF_OPT("std=gnu99", 0, OPT_std_gnu99) \
1211 DEF_OPT("std=gnu9x", 0, OPT_std_gnu9x) \
1212 DEF_OPT("std=iso9899:1990", 0, OPT_std_iso9899_1990) \
1213 DEF_OPT("std=iso9899:199409", 0, OPT_std_iso9899_199409) \
1214 DEF_OPT("std=iso9899:1999", 0, OPT_std_iso9899_1999) \
1215 DEF_OPT("std=iso9899:199x", 0, OPT_std_iso9899_199x) \
1216 DEF_OPT("trigraphs", 0, OPT_trigraphs) \
1217 DEF_OPT("v", 0, OPT_v) \
1218 DEF_OPT("version", 0, OPT_version) \
1219 DEF_OPT("w", 0, OPT_w)
1221 #define DEF_OPT(text, msg, code) code,
1224 COMMAND_LINE_OPTIONS
1231 const char *opt_text;
1234 enum opt_code opt_code;
1237 #define DEF_OPT(text, msg, code) { text, msg, sizeof(text) - 1, code },
1239 static struct cl_option cl_options[] =
1241 static const struct cl_option cl_options[] =
1244 COMMAND_LINE_OPTIONS
1247 #undef COMMAND_LINE_OPTIONS
1249 /* Perform a binary search to find which, if any, option the given
1250 command-line matches. Returns its index in the option array,
1251 negative on failure. Complications arise since some options can be
1252 suffixed with an argument, and multiple complete matches can occur,
1253 e.g. -iwithprefix and -iwithprefixbefore. Moreover, we need to
1254 accept options beginning with -W that we do not recognise, but not
1255 to swallow any subsequent command line argument; this is handled as
1256 special cases in cpp_handle_option. */
1258 parse_option (input)
1261 unsigned int md, mn, mx;
1272 opt_len = cl_options[md].opt_len;
1273 comp = memcmp (input, cl_options[md].opt_text, opt_len);
1281 if (input[opt_len] == '\0')
1283 /* We were passed more text. If the option takes an argument,
1284 we may match a later option or we may have been passed the
1285 argument. The longest possible option match succeeds.
1286 If the option takes no arguments we have not matched and
1287 continue the search (e.g. input="stdc++" match was "stdc"). */
1289 if (cl_options[md].msg)
1291 /* Scan forwards. If we get an exact match, return it.
1292 Otherwise, return the longest option-accepting match.
1293 This loops no more than twice with current options. */
1295 for (; mn < (unsigned int) N_OPTS; mn++)
1297 opt_len = cl_options[mn].opt_len;
1298 if (memcmp (input, cl_options[mn].opt_text, opt_len))
1300 if (input[opt_len] == '\0')
1302 if (cl_options[mn].msg)
1313 /* Handle one command-line option in (argc, argv).
1314 Can be called multiple times, to handle multiple sets of options.
1315 Returns number of strings consumed. */
1317 cpp_handle_option (pfile, argc, argv)
1323 struct cpp_pending *pend = CPP_OPTION (pfile, pending);
1325 /* Interpret "-" or a non-option as a file name. */
1326 if (argv[i][0] != '-' || argv[i][1] == '\0')
1328 if (CPP_OPTION (pfile, in_fname) == NULL)
1329 CPP_OPTION (pfile, in_fname) = argv[i];
1330 else if (CPP_OPTION (pfile, out_fname) == NULL)
1331 CPP_OPTION (pfile, out_fname) = argv[i];
1333 cpp_fatal (pfile, "too many filenames. Type %s --help for usage info",
1338 enum opt_code opt_code;
1340 const char *arg = 0;
1342 /* Skip over '-'. */
1343 opt_index = parse_option (&argv[i][1]);
1347 opt_code = cl_options[opt_index].opt_code;
1348 if (cl_options[opt_index].msg)
1350 arg = &argv[i][cl_options[opt_index].opt_len + 1];
1352 /* Yuk. Special case for -W as it must not swallow
1353 up any following argument. If this becomes common, add
1354 another field to the cl_options table. */
1355 if (arg[0] == '\0' && opt_code != OPT_W)
1360 cpp_fatal (pfile, cl_options[opt_index].msg, argv[i - 1]);
1368 case N_OPTS: /* Shut GCC up. */
1370 case OPT_fleading_underscore:
1371 CPP_OPTION (pfile, user_label_prefix) = "_";
1373 case OPT_fno_leading_underscore:
1374 CPP_OPTION (pfile, user_label_prefix) = "";
1376 case OPT_fno_operator_names:
1377 CPP_OPTION (pfile, operator_names) = 0;
1379 case OPT_fpreprocessed:
1380 CPP_OPTION (pfile, preprocessed) = 1;
1382 case OPT_fno_preprocessed:
1383 CPP_OPTION (pfile, preprocessed) = 0;
1385 case OPT_fshow_column:
1386 CPP_OPTION (pfile, show_column) = 1;
1388 case OPT_fno_show_column:
1389 CPP_OPTION (pfile, show_column) = 0;
1392 /* Silently ignore empty string, non-longs and silly values. */
1396 long tabstop = strtol (arg, &endptr, 10);
1397 if (*endptr == '\0' && tabstop >= 1 && tabstop <= 100)
1398 CPP_OPTION (pfile, tabstop) = tabstop;
1402 CPP_OPTION (pfile, inhibit_warnings) = 1;
1407 CPP_OPTION (pfile, help_only) = 1;
1409 case OPT_target__help:
1410 /* Print if any target specific options. cpplib has none, but
1411 make sure help_only gets set. */
1412 CPP_OPTION (pfile, help_only) = 1;
1415 /* --version inhibits compilation, -version doesn't. -v means
1416 verbose and -version. Historical reasons, don't ask. */
1418 CPP_OPTION (pfile, help_only) = 1;
1419 pfile->print_version = 1;
1422 CPP_OPTION (pfile, verbose) = 1;
1423 pfile->print_version = 1;
1426 pfile->print_version = 1;
1430 CPP_OPTION (pfile, discard_comments) = 0;
1433 CPP_OPTION (pfile, no_line_commands) = 1;
1435 case OPT_dollar: /* Don't include $ in identifiers. */
1436 CPP_OPTION (pfile, dollars_in_ident) = 0;
1439 CPP_OPTION (pfile, print_include_names) = 1;
1442 new_pending_directive (pend, arg, cpp_define);
1444 case OPT_pedantic_errors:
1445 CPP_OPTION (pfile, pedantic_errors) = 1;
1448 CPP_OPTION (pfile, pedantic) = 1;
1451 CPP_OPTION (pfile, trigraphs) = 1;
1454 CPP_OPTION (pfile, cplusplus) = 1;
1455 CPP_OPTION (pfile, cplusplus_comments) = 1;
1458 CPP_OPTION (pfile, remap) = 1;
1461 CPP_OPTION (pfile, include_prefix) = arg;
1462 CPP_OPTION (pfile, include_prefix_len) = strlen (arg);
1465 set_lang (pfile, CLK_GNUC89);
1467 case OPT_lang_cplusplus:
1468 set_lang (pfile, CLK_GNUCXX);
1471 set_lang (pfile, CLK_OBJC);
1473 case OPT_lang_objcplusplus:
1474 set_lang (pfile, CLK_OBJCXX);
1477 set_lang (pfile, CLK_ASM);
1479 case OPT_std_cplusplus98:
1480 set_lang (pfile, CLK_CXX98);
1483 set_lang (pfile, CLK_GNUC89);
1487 set_lang (pfile, CLK_GNUC99);
1489 case OPT_std_iso9899_199409:
1490 set_lang (pfile, CLK_STDC94);
1492 case OPT_std_iso9899_1990:
1495 set_lang (pfile, CLK_STDC89);
1497 case OPT_std_iso9899_199x:
1498 case OPT_std_iso9899_1999:
1501 set_lang (pfile, CLK_STDC99);
1504 /* -nostdinc causes no default include directories.
1505 You must specify all include-file directories with -I. */
1506 CPP_OPTION (pfile, no_standard_includes) = 1;
1508 case OPT_nostdincplusplus:
1509 /* -nostdinc++ causes no default C++-specific include directories. */
1510 CPP_OPTION (pfile, no_standard_cplusplus_includes) = 1;
1513 if (CPP_OPTION (pfile, out_fname) == NULL)
1514 CPP_OPTION (pfile, out_fname) = arg;
1517 cpp_fatal (pfile, "output filename specified twice");
1522 /* Args to -d specify what parts of macros to dump.
1523 Silently ignore unrecognised options; they may
1524 be aimed at the compiler proper. */
1528 while ((c = *arg++) != '\0')
1532 CPP_OPTION (pfile, dump_macros) = dump_only;
1533 CPP_OPTION (pfile, no_output) = 1;
1536 CPP_OPTION (pfile, dump_macros) = dump_names;
1539 CPP_OPTION (pfile, dump_macros) = dump_definitions;
1542 CPP_OPTION (pfile, dump_includes) = 1;
1549 CPP_OPTION (pfile, print_deps_missing_files) = 1;
1552 CPP_OPTION (pfile, print_deps) = 2;
1555 CPP_OPTION (pfile, print_deps) = 1;
1558 CPP_OPTION (pfile, deps_file) = arg;
1561 CPP_OPTION (pfile, deps_phony_targets) = 1;
1565 /* Add a target. -MQ quotes for Make. */
1566 deps_add_target (pfile->deps, arg, opt_code == OPT_MQ);
1569 /* -MD and -MMD for cpp0 are deprecated and undocumented
1570 (use -M or -MM with -MF instead), and probably should be
1571 removed with the next major GCC version. For the moment
1572 we allow these for the benefit of Automake 1.4, which
1573 uses these when dependency tracking is enabled. Automake
1574 1.5 will fix this. */
1576 CPP_OPTION (pfile, print_deps) = 2;
1577 CPP_OPTION (pfile, deps_file) = arg;
1580 CPP_OPTION (pfile, print_deps) = 1;
1581 CPP_OPTION (pfile, deps_file) = arg;
1587 /* -A with an argument beginning with '-' acts as
1588 #unassert on whatever immediately follows the '-'.
1589 If "-" is the whole argument, we eliminate all
1590 predefined macros and assertions, including those
1591 that were specified earlier on the command line.
1592 That way we can get rid of any that were passed
1593 automatically in from GCC. */
1597 free_chain (pend->directive_head);
1598 pend->directive_head = NULL;
1599 pend->directive_tail = NULL;
1602 new_pending_directive (pend, arg + 1, cpp_unassert);
1605 new_pending_directive (pend, arg, cpp_assert);
1608 new_pending_directive (pend, arg, cpp_undef);
1610 case OPT_I: /* Add directory to path for includes. */
1611 if (!strcmp (arg, "-"))
1614 Use the preceding -I directories for #include "..."
1615 but not #include <...>.
1616 Don't search the directory of the present file
1617 for #include "...". (Note that -I. -I- is not the same as
1618 the default setup; -I. uses the compiler's working dir.) */
1619 if (! CPP_OPTION (pfile, ignore_srcdir))
1621 pend->quote_head = pend->brack_head;
1622 pend->quote_tail = pend->brack_tail;
1623 pend->brack_head = 0;
1624 pend->brack_tail = 0;
1625 CPP_OPTION (pfile, ignore_srcdir) = 1;
1629 cpp_fatal (pfile, "-I- specified twice");
1634 append_include_chain (pfile, xstrdup (arg), BRACKET, 0);
1637 /* Add directory to beginning of system include path, as a system
1638 include directory. */
1639 append_include_chain (pfile, xstrdup (arg), SYSTEM, 0);
1644 struct pending_option *o = (struct pending_option *)
1645 xmalloc (sizeof (struct pending_option));
1649 if (opt_code == OPT_include)
1650 APPEND (pend, include, o);
1652 APPEND (pend, imacros, o);
1655 case OPT_iwithprefix:
1656 /* Add directory to end of path for includes,
1657 with the default prefix at the front of its name. */
1659 case OPT_iwithprefixbefore:
1660 /* Add directory to main path for includes,
1661 with the default prefix at the front of its name. */
1668 if (CPP_OPTION (pfile, include_prefix) != 0)
1670 size_t ipl = CPP_OPTION (pfile, include_prefix_len);
1671 fname = xmalloc (ipl + len + 1);
1672 memcpy (fname, CPP_OPTION (pfile, include_prefix), ipl);
1673 memcpy (fname + ipl, arg, len + 1);
1675 else if (cpp_GCC_INCLUDE_DIR_len)
1677 fname = xmalloc (cpp_GCC_INCLUDE_DIR_len + len + 1);
1678 memcpy (fname, cpp_GCC_INCLUDE_DIR, cpp_GCC_INCLUDE_DIR_len);
1679 memcpy (fname + cpp_GCC_INCLUDE_DIR_len, arg, len + 1);
1682 fname = xstrdup (arg);
1684 append_include_chain (pfile, fname,
1685 opt_code == OPT_iwithprefix ? SYSTEM: BRACKET, 0);
1689 /* Add directory to end of path for includes. */
1690 append_include_chain (pfile, xstrdup (arg), AFTER, 0);
1693 /* Silently ignore unrecognised options. */
1694 if (!strcmp (argv[i], "-Wall"))
1696 CPP_OPTION (pfile, warn_trigraphs) = 1;
1697 CPP_OPTION (pfile, warn_comments) = 1;
1699 else if (!strcmp (argv[i], "-Wtraditional"))
1700 CPP_OPTION (pfile, warn_traditional) = 1;
1701 else if (!strcmp (argv[i], "-Wtrigraphs"))
1702 CPP_OPTION (pfile, warn_trigraphs) = 1;
1703 else if (!strcmp (argv[i], "-Wcomment"))
1704 CPP_OPTION (pfile, warn_comments) = 1;
1705 else if (!strcmp (argv[i], "-Wcomments"))
1706 CPP_OPTION (pfile, warn_comments) = 1;
1707 else if (!strcmp (argv[i], "-Wundef"))
1708 CPP_OPTION (pfile, warn_undef) = 1;
1709 else if (!strcmp (argv[i], "-Wimport"))
1710 CPP_OPTION (pfile, warn_import) = 1;
1711 else if (!strcmp (argv[i], "-Werror"))
1712 CPP_OPTION (pfile, warnings_are_errors) = 1;
1713 else if (!strcmp (argv[i], "-Wsystem-headers"))
1714 CPP_OPTION (pfile, warn_system_headers) = 1;
1715 else if (!strcmp (argv[i], "-Wno-traditional"))
1716 CPP_OPTION (pfile, warn_traditional) = 0;
1717 else if (!strcmp (argv[i], "-Wno-trigraphs"))
1718 CPP_OPTION (pfile, warn_trigraphs) = 0;
1719 else if (!strcmp (argv[i], "-Wno-comment"))
1720 CPP_OPTION (pfile, warn_comments) = 0;
1721 else if (!strcmp (argv[i], "-Wno-comments"))
1722 CPP_OPTION (pfile, warn_comments) = 0;
1723 else if (!strcmp (argv[i], "-Wno-undef"))
1724 CPP_OPTION (pfile, warn_undef) = 0;
1725 else if (!strcmp (argv[i], "-Wno-import"))
1726 CPP_OPTION (pfile, warn_import) = 0;
1727 else if (!strcmp (argv[i], "-Wno-error"))
1728 CPP_OPTION (pfile, warnings_are_errors) = 0;
1729 else if (!strcmp (argv[i], "-Wno-system-headers"))
1730 CPP_OPTION (pfile, warn_system_headers) = 0;
1737 /* Handle command-line options in (argc, argv).
1738 Can be called multiple times, to handle multiple sets of options.
1739 Returns if an unrecognized option is seen.
1740 Returns number of strings consumed. */
1742 cpp_handle_options (pfile, argc, argv)
1748 int strings_processed;
1750 for (i = 0; i < argc; i += strings_processed)
1752 strings_processed = cpp_handle_option (pfile, argc - i, argv + i);
1753 if (strings_processed == 0)
1760 /* Extra processing when all options are parsed, after all calls to
1761 cpp_handle_option[s]. Consistency checks etc. */
1763 cpp_post_options (pfile)
1766 if (pfile->print_version)
1768 fprintf (stderr, _("GNU CPP version %s (cpplib)"), version_string);
1769 #ifdef TARGET_VERSION
1772 fputc ('\n', stderr);
1775 /* Canonicalize in_fname and out_fname. We guarantee they are not
1776 NULL, and that the empty string represents stdin / stdout. */
1777 if (CPP_OPTION (pfile, in_fname) == NULL
1778 || !strcmp (CPP_OPTION (pfile, in_fname), "-"))
1779 CPP_OPTION (pfile, in_fname) = "";
1781 if (CPP_OPTION (pfile, out_fname) == NULL
1782 || !strcmp (CPP_OPTION (pfile, out_fname), "-"))
1783 CPP_OPTION (pfile, out_fname) = "";
1785 /* -Wtraditional is not useful in C++ mode. */
1786 if (CPP_OPTION (pfile, cplusplus))
1787 CPP_OPTION (pfile, warn_traditional) = 0;
1789 /* Set this if it hasn't been set already. */
1790 if (CPP_OPTION (pfile, user_label_prefix) == NULL)
1791 CPP_OPTION (pfile, user_label_prefix) = USER_LABEL_PREFIX;
1793 /* Permanently disable macro expansion if we are rescanning
1794 preprocessed text. */
1795 if (CPP_OPTION (pfile, preprocessed))
1796 pfile->state.prevent_expansion = 1;
1798 /* We need to do this after option processing and before
1799 cpp_start_read, as cppmain.c relies on the options->no_output to
1800 set its callbacks correctly before calling cpp_start_read. */
1801 init_dependency_output (pfile);
1803 /* After checking the environment variables, check if -M or -MM has
1804 not been specified, but other -M options have. */
1805 if (CPP_OPTION (pfile, print_deps) == 0 &&
1806 (CPP_OPTION (pfile, print_deps_missing_files)
1807 || CPP_OPTION (pfile, deps_file)
1808 || CPP_OPTION (pfile, deps_phony_targets)))
1809 cpp_fatal (pfile, "you must additionally specify either -M or -MM");
1812 /* Set up dependency-file output. */
1814 init_dependency_output (pfile)
1817 char *spec, *s, *output_file;
1819 /* Either of two environment variables can specify output of deps.
1820 Its value is either "OUTPUT_FILE" or "OUTPUT_FILE DEPS_TARGET",
1821 where OUTPUT_FILE is the file to write deps info to
1822 and DEPS_TARGET is the target to mention in the deps. */
1824 if (CPP_OPTION (pfile, print_deps) == 0)
1826 spec = getenv ("DEPENDENCIES_OUTPUT");
1828 CPP_OPTION (pfile, print_deps) = 1;
1831 spec = getenv ("SUNPRO_DEPENDENCIES");
1833 CPP_OPTION (pfile, print_deps) = 2;
1838 /* Find the space before the DEPS_TARGET, if there is one. */
1839 s = strchr (spec, ' ');
1842 /* Let the caller perform MAKE quoting. */
1843 deps_add_target (pfile->deps, s + 1, 0);
1844 output_file = (char *) xmalloc (s - spec + 1);
1845 memcpy (output_file, spec, s - spec);
1846 output_file[s - spec] = 0;
1851 /* Command line overrides environment variables. */
1852 if (CPP_OPTION (pfile, deps_file) == 0)
1853 CPP_OPTION (pfile, deps_file) = output_file;
1854 CPP_OPTION (pfile, print_deps_append) = 1;
1857 /* If dependencies go to standard output, or -MG is used, we should
1858 suppress output, including -dM, -dI etc. */
1859 if (CPP_OPTION (pfile, deps_file) == 0
1860 || CPP_OPTION (pfile, print_deps_missing_files))
1862 CPP_OPTION (pfile, no_output) = 1;
1863 CPP_OPTION (pfile, dump_macros) = 0;
1864 CPP_OPTION (pfile, dump_includes) = 0;
1868 /* Handle --help output. */
1872 fprintf (stderr, _("Usage: %s [switches] input output\n"), progname);
1873 /* To keep the lines from getting too long for some compilers, limit
1874 to about 500 characters (6 lines) per chunk. */
1877 -include <file> Include the contents of <file> before other files\n\
1878 -imacros <file> Accept definition of macros in <file>\n\
1879 -iprefix <path> Specify <path> as a prefix for next two options\n\
1880 -iwithprefix <dir> Add <dir> to the end of the system include path\n\
1881 -iwithprefixbefore <dir> Add <dir> to the end of the main include path\n\
1882 -isystem <dir> Add <dir> to the start of the system include path\n\
1885 -idirafter <dir> Add <dir> to the end of the system include path\n\
1886 -I <dir> Add <dir> to the end of the main include path\n\
1887 -I- Fine-grained include path control; see info docs\n\
1888 -nostdinc Do not search system include directories\n\
1889 (dirs specified with -isystem will still be used)\n\
1890 -nostdinc++ Do not search system include directories for C++\n\
1891 -o <file> Put output into <file>\n\
1894 -pedantic Issue all warnings demanded by strict ISO C\n\
1895 -pedantic-errors Issue -pedantic warnings as errors instead\n\
1896 -trigraphs Support ISO C trigraphs\n\
1897 -lang-c Assume that the input sources are in C\n\
1898 -lang-c89 Assume that the input sources are in C89\n\
1901 -lang-c++ Assume that the input sources are in C++\n\
1902 -lang-objc Assume that the input sources are in ObjectiveC\n\
1903 -lang-objc++ Assume that the input sources are in ObjectiveC++\n\
1904 -lang-asm Assume that the input sources are in assembler\n\
1907 -std=<std name> Specify the conformance standard; one of:\n\
1908 gnu89, gnu99, c89, c99, iso9899:1990,\n\
1909 iso9899:199409, iso9899:1999\n\
1910 -+ Allow parsing of C++ style features\n\
1911 -w Inhibit warning messages\n\
1912 -Wtrigraphs Warn if trigraphs are encountered\n\
1913 -Wno-trigraphs Do not warn about trigraphs\n\
1914 -Wcomment{s} Warn if one comment starts inside another\n\
1917 -Wno-comment{s} Do not warn about comments\n\
1918 -Wtraditional Warn about features not present in traditional C\n\
1919 -Wno-traditional Do not warn about traditional C\n\
1920 -Wundef Warn if an undefined macro is used by #if\n\
1921 -Wno-undef Do not warn about testing undefined macros\n\
1922 -Wimport Warn about the use of the #import directive\n\
1925 -Wno-import Do not warn about the use of #import\n\
1926 -Werror Treat all warnings as errors\n\
1927 -Wno-error Do not treat warnings as errors\n\
1928 -Wsystem-headers Do not suppress warnings from system headers\n\
1929 -Wno-system-headers Suppress warnings from system headers\n\
1930 -Wall Enable all preprocessor warnings\n\
1933 -M Generate make dependencies\n\
1934 -MM As -M, but ignore system header files\n\
1935 -MF <file> Write dependency output to the given file\n\
1936 -MG Treat missing header file as generated files\n\
1939 -MP Generate phony targets for all headers\n\
1940 -MQ <target> Add a MAKE-quoted target\n\
1941 -MT <target> Add an unquoted target\n\
1944 -D<macro> Define a <macro> with string '1' as its value\n\
1945 -D<macro>=<val> Define a <macro> with <val> as its value\n\
1946 -A<question> (<answer>) Assert the <answer> to <question>\n\
1947 -A-<question> (<answer>) Disable the <answer> to <question>\n\
1948 -U<macro> Undefine <macro> \n\
1949 -v Display the version number\n\
1952 -H Print the name of header files as they are used\n\
1953 -C Do not discard comments\n\
1954 -dM Display a list of macro definitions active at end\n\
1955 -dD Preserve macro definitions in output\n\
1956 -dN As -dD except that only the names are preserved\n\
1957 -dI Include #include directives in the output\n\
1960 -fpreprocessed Treat the input file as already preprocessed\n\
1961 -ftabstop=<number> Distance between tab stops for column reporting\n\
1962 -P Do not generate #line directives\n\
1963 -$ Do not allow '$' in identifiers\n\
1964 -remap Remap file names when including files.\n\
1965 --version Display version information\n\
1966 -h or --help Display this information\n\