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"
31 #include "except.h" /* for USING_SJLJ_EXCEPTIONS */
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)))
44 # define INO_T_COPY(DEST, SRC) memcpy(&(DEST), &(SRC), sizeof (SRC))
46 # if (defined _WIN32 && ! defined (_UWIN)) || defined __MSDOS__
47 # define INO_T_EQ(A, B) 0
49 # define INO_T_EQ(A, B) ((A) == (B))
51 # define INO_T_COPY(DEST, SRC) (DEST) = (SRC)
54 /* Internal structures and prototypes. */
56 /* A `struct pending_option' remembers one -D, -A, -U, -include, or
58 typedef void (* cl_directive_handler) PARAMS ((cpp_reader *, const char *));
61 struct pending_option *next;
63 cl_directive_handler handler;
66 /* The `pending' structure accumulates all the options that are not
67 actually processed until we hit cpp_read_main_file. It consists of
68 several lists, one for each type of option. We keep both head and
69 tail pointers for quick insertion. */
72 struct pending_option *directive_head, *directive_tail;
74 struct search_path *quote_head, *quote_tail;
75 struct search_path *brack_head, *brack_tail;
76 struct search_path *systm_head, *systm_tail;
77 struct search_path *after_head, *after_tail;
79 struct pending_option *imacros_head, *imacros_tail;
80 struct pending_option *include_head, *include_tail;
84 #define APPEND(pend, list, elt) \
85 do { if (!(pend)->list##_head) (pend)->list##_head = (elt); \
86 else (pend)->list##_tail->next = (elt); \
87 (pend)->list##_tail = (elt); \
90 #define APPEND(pend, list, elt) \
91 do { if (!(pend)->list/**/_head) (pend)->list/**/_head = (elt); \
92 else (pend)->list/**/_tail->next = (elt); \
93 (pend)->list/**/_tail = (elt); \
97 static void print_help PARAMS ((void));
98 static void path_include PARAMS ((cpp_reader *,
100 static void init_library PARAMS ((void));
101 static void init_builtins PARAMS ((cpp_reader *));
102 static void append_include_chain PARAMS ((cpp_reader *,
104 static struct search_path * remove_dup_dir PARAMS ((cpp_reader *,
105 struct search_path *));
106 static struct search_path * remove_dup_dirs PARAMS ((cpp_reader *,
107 struct search_path *));
108 static void merge_include_chains PARAMS ((cpp_reader *));
109 static bool push_include PARAMS ((cpp_reader *,
110 struct pending_option *));
111 static void free_chain PARAMS ((struct pending_option *));
112 static void set_lang PARAMS ((cpp_reader *, enum c_lang));
113 static void init_dependency_output PARAMS ((cpp_reader *));
114 static void init_standard_includes PARAMS ((cpp_reader *));
115 static void read_original_filename PARAMS ((cpp_reader *));
116 static void new_pending_directive PARAMS ((struct cpp_pending *,
118 cl_directive_handler));
119 static void output_deps PARAMS ((cpp_reader *));
120 static int parse_option PARAMS ((const char *));
122 /* Fourth argument to append_include_chain: chain to use.
123 Note it's never asked to append to the quote chain. */
124 enum { BRACKET = 0, SYSTEM, AFTER };
126 /* If we have designated initializers (GCC >2.7) these tables can be
127 initialized, constant data. Otherwise, they have to be filled in at
129 #if HAVE_DESIGNATED_INITIALIZERS
131 #define init_trigraph_map() /* Nothing. */
132 #define TRIGRAPH_MAP \
133 __extension__ const U_CHAR _cpp_trigraph_map[UCHAR_MAX + 1] = {
136 #define s(p, v) [p] = v,
140 #define TRIGRAPH_MAP U_CHAR _cpp_trigraph_map[UCHAR_MAX + 1] = { 0 }; \
141 static void init_trigraph_map PARAMS ((void)) { \
142 unsigned char *x = _cpp_trigraph_map;
145 #define s(p, v) x[p] = v;
150 s('=', '#') s(')', ']') s('!', '|')
151 s('(', '[') s('\'', '^') s('>', '}')
152 s('/', '\\') s('<', '{') s('-', '~')
159 /* Given a colon-separated list of file names PATH,
160 add all the names to the search path for include files. */
162 path_include (pfile, list, path)
173 /* Find the end of this name. */
175 while (*q != 0 && *q != PATH_SEPARATOR) q++;
178 /* An empty name in the path stands for the current directory. */
179 name = (char *) xmalloc (2);
185 /* Otherwise use the directory that is named. */
186 name = (char *) xmalloc (q - p + 1);
187 memcpy (name, p, q - p);
191 append_include_chain (pfile, name, path, 0);
193 /* Advance past this name. */
201 /* Append DIR to include path PATH. DIR must be allocated on the
202 heap; this routine takes responsibility for freeing it. CXX_AWARE
203 is non-zero if the header contains extern "C" guards for C++,
204 otherwise it is zero. */
206 append_include_chain (pfile, dir, path, cxx_aware)
210 int cxx_aware ATTRIBUTE_UNUSED;
212 struct cpp_pending *pend = CPP_OPTION (pfile, pending);
213 struct search_path *new;
222 _cpp_simplify_pathname (dir);
226 /* Dirs that don't exist are silently ignored. */
228 cpp_notice_from_errno (pfile, dir);
229 else if (CPP_OPTION (pfile, verbose))
230 fprintf (stderr, _("ignoring nonexistent directory \"%s\"\n"), dir);
235 if (!S_ISDIR (st.st_mode))
237 cpp_notice (pfile, "%s: Not a directory", dir);
243 if (len > pfile->max_include_len)
244 pfile->max_include_len = len;
246 new = (struct search_path *) xmalloc (sizeof (struct search_path));
249 INO_T_COPY (new->ino, st.st_ino);
250 new->dev = st.st_dev;
251 /* Both systm and after include file lists should be treated as system
252 include files since these two lists are really just a concatenation
253 of one "system" list. */
254 if (path == SYSTEM || path == AFTER)
255 #ifdef NO_IMPLICIT_EXTERN_C
258 new->sysp = cxx_aware ? 1 : 2;
262 new->name_map = NULL;
267 case BRACKET: APPEND (pend, brack, new); break;
268 case SYSTEM: APPEND (pend, systm, new); break;
269 case AFTER: APPEND (pend, after, new); break;
273 /* Handle a duplicated include path. PREV is the link in the chain
274 before the duplicate. The duplicate is removed from the chain and
275 freed. Returns PREV. */
276 static struct search_path *
277 remove_dup_dir (pfile, prev)
279 struct search_path *prev;
281 struct search_path *cur = prev->next;
283 if (CPP_OPTION (pfile, verbose))
284 fprintf (stderr, _("ignoring duplicate directory \"%s\"\n"), cur->name);
286 prev->next = cur->next;
287 free ((PTR) cur->name);
293 /* Remove duplicate directories from a chain. Returns the tail of the
294 chain, or NULL if the chain is empty. This algorithm is quadratic
295 in the number of -I switches, which is acceptable since there
296 aren't usually that many of them. */
297 static struct search_path *
298 remove_dup_dirs (pfile, head)
300 struct search_path *head;
302 struct search_path *prev = NULL, *cur, *other;
304 for (cur = head; cur; cur = cur->next)
306 for (other = head; other != cur; other = other->next)
307 if (INO_T_EQ (cur->ino, other->ino) && cur->dev == other->dev)
309 if (cur->sysp && !other->sysp)
312 "changing search order for system directory \"%s\"",
314 if (strcmp (cur->name, other->name))
316 " as it is the same as non-system directory \"%s\"",
320 " as it has already been specified as a non-system directory");
322 cur = remove_dup_dir (pfile, prev);
331 /* Merge the four include chains together in the order quote, bracket,
332 system, after. Remove duplicate dirs (as determined by
333 INO_T_EQ()). The system_include and after_include chains are never
334 referred to again after this function; all access is through the
335 bracket_include path. */
337 merge_include_chains (pfile)
340 struct search_path *quote, *brack, *systm, *qtail;
342 struct cpp_pending *pend = CPP_OPTION (pfile, pending);
344 quote = pend->quote_head;
345 brack = pend->brack_head;
346 systm = pend->systm_head;
347 qtail = pend->quote_tail;
349 /* Paste together bracket, system, and after include chains. */
351 pend->systm_tail->next = pend->after_head;
353 systm = pend->after_head;
356 pend->brack_tail->next = systm;
360 /* This is a bit tricky. First we drop dupes from the quote-include
361 list. Then we drop dupes from the bracket-include list.
362 Finally, if qtail and brack are the same directory, we cut out
363 brack and move brack up to point to qtail.
365 We can't just merge the lists and then uniquify them because
366 then we may lose directories from the <> search path that should
367 be there; consider -Ifoo -Ibar -I- -Ifoo -Iquux. It is however
368 safe to treat -Ibar -Ifoo -I- -Ifoo -Iquux as if written
369 -Ibar -I- -Ifoo -Iquux. */
371 remove_dup_dirs (pfile, brack);
372 qtail = remove_dup_dirs (pfile, quote);
378 /* If brack == qtail, remove brack as it's simpler. */
379 if (brack && INO_T_EQ (qtail->ino, brack->ino)
380 && 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 /* A set of booleans indicating what CPP features each source language
397 char extended_numbers;
399 char dollars_in_ident;
400 char cplusplus_comments;
404 /* ??? Enable $ in identifiers in assembly? */
405 static const struct lang_flags lang_defaults[] =
406 { /* c99 objc c++ xnum trig dollar c++comm digr */
407 /* GNUC89 */ { 0, 0, 0, 1, 0, 1, 1, 1 },
408 /* GNUC99 */ { 1, 0, 0, 1, 0, 1, 1, 1 },
409 /* STDC89 */ { 0, 0, 0, 0, 1, 0, 0, 0 },
410 /* STDC94 */ { 0, 0, 0, 0, 1, 0, 0, 1 },
411 /* STDC99 */ { 1, 0, 0, 1, 1, 0, 1, 1 },
412 /* GNUCXX */ { 0, 0, 1, 1, 0, 1, 1, 1 },
413 /* CXX98 */ { 0, 0, 1, 1, 1, 0, 1, 1 },
414 /* OBJC */ { 0, 1, 0, 1, 0, 1, 1, 1 },
415 /* OBJCXX */ { 0, 1, 1, 1, 0, 1, 1, 1 },
416 /* ASM */ { 0, 0, 0, 1, 0, 0, 1, 0 }
419 /* Sets internal flags correctly for a given language. */
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. */
457 static int initialized = 0;
464 /* For non-ASCII hosts, the cl_options array needs to be sorted at
466 qsort (cl_options, N_OPTS, sizeof (struct cl_option), opt_comp);
469 /* Set up the trigraph map. This doesn't need to do anything if
470 we were compiled with a compiler that supports C99 designated
472 init_trigraph_map ();
476 /* Initialize a cpp_reader structure. */
478 cpp_create_reader (lang)
483 /* Initialise this instance of the library if it hasn't been already. */
486 pfile = (cpp_reader *) xcalloc (1, sizeof (cpp_reader));
488 set_lang (pfile, lang);
489 CPP_OPTION (pfile, warn_import) = 1;
490 CPP_OPTION (pfile, discard_comments) = 1;
491 CPP_OPTION (pfile, show_column) = 1;
492 CPP_OPTION (pfile, tabstop) = 8;
493 CPP_OPTION (pfile, operator_names) = 1;
494 CPP_OPTION (pfile, warn_endif_labels) = 1;
495 #if DEFAULT_SIGNED_CHAR
496 CPP_OPTION (pfile, signed_char) = 1;
498 CPP_OPTION (pfile, signed_char) = 0;
501 CPP_OPTION (pfile, pending) =
502 (struct cpp_pending *) xcalloc (1, sizeof (struct cpp_pending));
504 /* It's simplest to just create this struct whether or not it will
506 pfile->deps = deps_init ();
508 /* Initialise the line map. Start at logical line 1, so we can use
509 a line number of zero for special states. */
510 init_line_maps (&pfile->line_maps);
513 /* Initialize lexer state. */
514 pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments);
516 /* Set up static tokens. */
517 pfile->date.type = CPP_EOF;
518 pfile->avoid_paste.type = CPP_PADDING;
519 pfile->avoid_paste.val.source = NULL;
520 pfile->eof.type = CPP_EOF;
521 pfile->eof.flags = 0;
523 /* Create a token buffer for the lexer. */
524 _cpp_init_tokenrun (&pfile->base_run, 250);
525 pfile->cur_run = &pfile->base_run;
526 pfile->cur_token = pfile->base_run.base;
528 /* Initialise the base context. */
529 pfile->context = &pfile->base_context;
530 pfile->base_context.macro = 0;
531 pfile->base_context.prev = pfile->base_context.next = 0;
533 /* Aligned and unaligned storage. */
534 pfile->a_buff = _cpp_get_buff (pfile, 0);
535 pfile->u_buff = _cpp_get_buff (pfile, 0);
537 /* Initialise the buffer obstack. */
538 gcc_obstack_init (&pfile->buffer_ob);
540 _cpp_init_includes (pfile);
545 /* Free resources used by PFILE. Accessing PFILE after this function
546 returns leads to undefined behaviour. Returns the error count. */
552 struct search_path *dir, *dirn;
553 cpp_context *context, *contextn;
554 tokenrun *run, *runn;
556 while (CPP_BUFFER (pfile) != NULL)
557 _cpp_pop_buffer (pfile);
559 if (pfile->macro_buffer)
561 free ((PTR) pfile->macro_buffer);
562 pfile->macro_buffer = NULL;
563 pfile->macro_buffer_len = 0;
566 deps_free (pfile->deps);
567 obstack_free (&pfile->buffer_ob, 0);
569 _cpp_destroy_hashtable (pfile);
570 _cpp_cleanup_includes (pfile);
572 _cpp_free_buff (pfile->a_buff);
573 _cpp_free_buff (pfile->u_buff);
574 _cpp_free_buff (pfile->free_buffs);
576 for (run = &pfile->base_run; run; run = runn)
580 if (run != &pfile->base_run)
584 for (dir = CPP_OPTION (pfile, quote_include); dir; dir = dirn)
587 free ((PTR) dir->name);
591 for (context = pfile->base_context.next; context; context = contextn)
593 contextn = context->next;
597 free_line_maps (&pfile->line_maps);
599 result = pfile->errors;
606 /* This structure defines one built-in identifier. A node will be
607 entered in the hash table under the name NAME, with value VALUE (if
608 any). If flags has OPERATOR, the node's operator field is used; if
609 flags has BUILTIN the node's builtin field is used. Macros that are
610 known at build time should not be flagged BUILTIN, as then they do
611 not appear in macro dumps with e.g. -dM or -dD.
613 Two values are not compile time constants, so we tag
614 them in the FLAGS field instead:
615 VERS value is the global version_string, quoted
616 ULP value is the global user_label_prefix
618 Also, macros with CPLUS set in the flags field are entered only for C++. */
623 unsigned char builtin;
624 unsigned char operator;
625 unsigned short flags;
632 #define OPERATOR 0x10
634 #define B(n, t) { U n, 0, t, 0, BUILTIN, sizeof n - 1 }
635 #define C(n, v) { U n, v, 0, 0, 0, sizeof n - 1 }
636 #define X(n, f) { U n, 0, 0, 0, f, sizeof n - 1 }
637 #define O(n, c, f) { U n, 0, 0, c, OPERATOR | f, sizeof n - 1 }
638 static const struct builtin builtin_array[] =
640 B("__TIME__", BT_TIME),
641 B("__DATE__", BT_DATE),
642 B("__FILE__", BT_FILE),
643 B("__BASE_FILE__", BT_BASE_FILE),
644 B("__LINE__", BT_SPECLINE),
645 B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL),
646 B("_Pragma", BT_PRAGMA),
648 X("__VERSION__", VERS),
649 X("__USER_LABEL_PREFIX__", ULP),
650 C("__REGISTER_PREFIX__", REGISTER_PREFIX),
651 C("__HAVE_BUILTIN_SETJMP__", "1"),
652 #if USING_SJLJ_EXCEPTIONS
653 /* libgcc needs to know this. */
654 C("__USING_SJLJ_EXCEPTIONS__","1"),
656 #ifndef NO_BUILTIN_SIZE_TYPE
657 C("__SIZE_TYPE__", SIZE_TYPE),
659 #ifndef NO_BUILTIN_PTRDIFF_TYPE
660 C("__PTRDIFF_TYPE__", PTRDIFF_TYPE),
662 #ifndef NO_BUILTIN_WCHAR_TYPE
663 C("__WCHAR_TYPE__", WCHAR_TYPE),
665 #ifndef NO_BUILTIN_WINT_TYPE
666 C("__WINT_TYPE__", WINT_TYPE),
668 #ifdef STDC_0_IN_SYSTEM_HEADERS
669 B("__STDC__", BT_STDC),
674 /* Named operators known to the preprocessor. These cannot be #defined
675 and always have their stated meaning. They are treated like normal
676 identifiers except for the type code and the meaning. Most of them
677 are only for C++ (but see iso646.h). */
678 O("and", CPP_AND_AND, CPLUS),
679 O("and_eq", CPP_AND_EQ, CPLUS),
680 O("bitand", CPP_AND, CPLUS),
681 O("bitor", CPP_OR, CPLUS),
682 O("compl", CPP_COMPL, CPLUS),
683 O("not", CPP_NOT, CPLUS),
684 O("not_eq", CPP_NOT_EQ, CPLUS),
685 O("or", CPP_OR_OR, CPLUS),
686 O("or_eq", CPP_OR_EQ, CPLUS),
687 O("xor", CPP_XOR, CPLUS),
688 O("xor_eq", CPP_XOR_EQ, CPLUS)
694 #define builtin_array_end (builtin_array + ARRAY_SIZE (builtin_array))
696 /* Subroutine of cpp_read_main_file; reads the builtins table above and
697 enters them, and language-specific macros, into the hash table. */
699 init_builtins (pfile)
702 const struct builtin *b;
704 for(b = builtin_array; b < builtin_array_end; b++)
706 if ((b->flags & CPLUS) && ! CPP_OPTION (pfile, cplusplus))
709 if ((b->flags & OPERATOR) && ! CPP_OPTION (pfile, operator_names))
712 if (b->flags & (OPERATOR | BUILTIN))
714 cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len);
715 if (b->flags & OPERATOR)
717 hp->flags |= NODE_OPERATOR;
718 hp->value.operator = b->operator;
723 hp->flags |= NODE_BUILTIN | NODE_WARN;
724 hp->value.builtin = b->builtin;
727 else /* A standard macro of some kind. */
734 /* Allocate enough space for 'name "value"\n\0'. */
735 str = alloca (b->len + strlen (version_string) + 5);
736 sprintf (str, "%s \"%s\"\n", b->name, version_string);
741 val = CPP_OPTION (pfile, user_label_prefix);
745 /* Allocate enough space for "name value\n\0". */
746 str = alloca (b->len + strlen (val) + 3);
747 sprintf(str, "%s %s\n", b->name, val);
750 _cpp_define_builtin (pfile, str);
754 if (CPP_OPTION (pfile, cplusplus))
756 _cpp_define_builtin (pfile, "__cplusplus 1");
757 if (SUPPORTS_ONE_ONLY)
758 _cpp_define_builtin (pfile, "__GXX_WEAK__ 1");
760 _cpp_define_builtin (pfile, "__GXX_WEAK__ 0");
762 if (CPP_OPTION (pfile, objc))
763 _cpp_define_builtin (pfile, "__OBJC__ 1");
765 if (CPP_OPTION (pfile, lang) == CLK_STDC94)
766 _cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L");
767 else if (CPP_OPTION (pfile, c99))
768 _cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L");
770 if (CPP_OPTION (pfile, signed_char) == 0)
771 _cpp_define_builtin (pfile, "__CHAR_UNSIGNED__ 1");
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 command line -imacro and -include file indicated by P 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. */
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 parsed, and partially
912 processed. Setup for processing input from the file named FNAME,
913 or stdin if it is the empty string. Return the original filename
914 on success (e.g. foo.i->foo.c), or NULL on failure. */
916 cpp_read_main_file (pfile, fname, table)
921 /* The front ends don't set up the hash table until they have
922 finished processing the command line options, so initializing the
923 hashtable is deferred until now. */
924 _cpp_init_hashtable (pfile, table);
926 /* Set up the include search path now. */
927 if (! CPP_OPTION (pfile, no_standard_includes))
928 init_standard_includes (pfile);
930 merge_include_chains (pfile);
932 /* With -v, print the list of dirs to search. */
933 if (CPP_OPTION (pfile, verbose))
935 struct search_path *l;
936 fprintf (stderr, _("#include \"...\" search starts here:\n"));
937 for (l = CPP_OPTION (pfile, quote_include); l; l = l->next)
939 if (l == CPP_OPTION (pfile, bracket_include))
940 fprintf (stderr, _("#include <...> search starts here:\n"));
941 fprintf (stderr, " %s\n", l->name);
943 fprintf (stderr, _("End of search list.\n"));
946 if (CPP_OPTION (pfile, print_deps))
947 /* Set the default target (if there is none already). */
948 deps_add_default_target (pfile->deps, fname);
950 /* Open the main input file. */
951 if (!_cpp_read_file (pfile, fname))
954 /* Set this after cpp_post_options so the client can change the
955 option if it wishes, and after stacking the main file so we don't
956 trace the main file. */
957 pfile->line_maps.trace_includes = CPP_OPTION (pfile, print_include_names);
959 /* For foo.i, read the original filename foo.c now, for the benefit
960 of the front ends. */
961 if (CPP_OPTION (pfile, preprocessed))
962 read_original_filename (pfile);
964 return pfile->map->to_file;
967 /* For preprocessed files, if the first tokens are of the form # NUM.
968 handle the directive so we know the original file name. This will
969 generate file_change callbacks, which the front ends must handle
970 appropriately given their state of initialization. */
972 read_original_filename (pfile)
975 const cpp_token *token, *token1;
977 /* Lex ahead; if the first tokens are of the form # NUM, then
978 process the directive, otherwise back up. */
979 token = _cpp_lex_direct (pfile);
980 if (token->type == CPP_HASH)
982 token1 = _cpp_lex_direct (pfile);
983 _cpp_backup_tokens (pfile, 1);
985 /* If it's a #line directive, handle it. */
986 if (token1->type == CPP_NUMBER)
988 _cpp_handle_directive (pfile, token->flags & PREV_WHITE);
993 /* Backup as if nothing happened. */
994 _cpp_backup_tokens (pfile, 1);
997 /* Handle pending command line options: -D, -U, -A, -imacros and
998 -include. This should be called after debugging has been properly
999 set up in the front ends. */
1001 cpp_finish_options (pfile)
1004 /* Install builtins and process command line macros etc. in the order
1005 they appeared, but only if not already preprocessed. */
1006 if (! CPP_OPTION (pfile, preprocessed))
1008 struct pending_option *p;
1010 _cpp_do_file_change (pfile, LC_RENAME, _("<built-in>"), 1, 0);
1011 init_builtins (pfile);
1012 _cpp_do_file_change (pfile, LC_RENAME, _("<command line>"), 1, 0);
1013 for (p = CPP_OPTION (pfile, pending)->directive_head; p; p = p->next)
1014 (*p->handler) (pfile, p->arg);
1016 /* Scan -imacros files after command line defines, but before
1017 files given with -include. */
1018 while ((p = CPP_OPTION (pfile, pending)->imacros_head) != NULL)
1020 if (push_include (pfile, p))
1022 pfile->buffer->return_at_eof = true;
1023 cpp_scan_nooutput (pfile);
1025 CPP_OPTION (pfile, pending)->imacros_head = p->next;
1030 free_chain (CPP_OPTION (pfile, pending)->directive_head);
1031 _cpp_push_next_buffer (pfile);
1034 /* Called to push the next buffer on the stack given by -include. If
1035 there are none, free the pending structure and restore the line map
1036 for the main file. */
1038 _cpp_push_next_buffer (pfile)
1041 bool pushed = false;
1043 /* This is't pretty; we'd rather not be relying on this as a boolean
1044 for reverting the line map. Further, we only free the chains in
1045 this conditional, so an early call to cpp_finish / cpp_destroy
1046 will leak that memory. */
1047 if (CPP_OPTION (pfile, pending)
1048 && CPP_OPTION (pfile, pending)->imacros_head == NULL)
1052 struct pending_option *p = CPP_OPTION (pfile, pending)->include_head;
1056 if (! CPP_OPTION (pfile, preprocessed))
1057 pushed = push_include (pfile, p);
1058 CPP_OPTION (pfile, pending)->include_head = p->next;
1064 free (CPP_OPTION (pfile, pending));
1065 CPP_OPTION (pfile, pending) = NULL;
1067 /* Restore the line map for the main file. */
1068 if (! CPP_OPTION (pfile, preprocessed))
1069 _cpp_do_file_change (pfile, LC_RENAME,
1070 pfile->line_maps.maps[0].to_file, 1, 0);
1077 /* Use mkdeps.c to output dependency information. */
1082 /* Stream on which to print the dependency information. */
1083 FILE *deps_stream = 0;
1084 const char *const deps_mode =
1085 CPP_OPTION (pfile, print_deps_append) ? "a" : "w";
1087 if (CPP_OPTION (pfile, deps_file)[0] == '\0')
1088 deps_stream = stdout;
1091 deps_stream = fopen (CPP_OPTION (pfile, deps_file), deps_mode);
1092 if (deps_stream == 0)
1094 cpp_notice_from_errno (pfile, CPP_OPTION (pfile, deps_file));
1099 deps_write (pfile->deps, deps_stream, 72);
1101 if (CPP_OPTION (pfile, deps_phony_targets))
1102 deps_phony_targets (pfile->deps, deps_stream);
1104 /* Don't close stdout. */
1105 if (deps_stream != stdout)
1107 if (ferror (deps_stream) || fclose (deps_stream) != 0)
1108 cpp_fatal (pfile, "I/O error on output");
1112 /* This is called at the end of preprocessing. It pops the
1113 last buffer and writes dependency output. It should also
1114 clear macro definitions, such that you could call cpp_start_read
1115 with a new filename to restart processing. */
1120 /* cpplex.c leaves the final buffer on the stack. This it so that
1121 it returns an unending stream of CPP_EOFs to the client. If we
1122 popped the buffer, we'd dereference a NULL buffer pointer and
1123 segfault. It's nice to allow the client to do worry-free excess
1124 cpp_get_token calls. */
1125 while (pfile->buffer)
1126 _cpp_pop_buffer (pfile);
1128 /* Don't write the deps file if preprocessing has failed. */
1129 if (CPP_OPTION (pfile, print_deps) && pfile->errors == 0)
1130 output_deps (pfile);
1132 /* Report on headers that could use multiple include guards. */
1133 if (CPP_OPTION (pfile, print_include_names))
1134 _cpp_report_missing_guards (pfile);
1137 /* Add a directive to be handled later in the initialization phase. */
1139 new_pending_directive (pend, text, handler)
1140 struct cpp_pending *pend;
1142 cl_directive_handler handler;
1144 struct pending_option *o = (struct pending_option *)
1145 xmalloc (sizeof (struct pending_option));
1149 o->handler = handler;
1150 APPEND (pend, directive, o);
1153 /* Irix6 "cc -n32" and OSF4 cc have problems with char foo[] = ("string");
1154 I.e. a const string initializer with parens around it. That is
1155 what N_("string") resolves to, so we make no_* be macros instead. */
1156 #define no_arg N_("argument missing after %s")
1157 #define no_ass N_("assertion missing after %s")
1158 #define no_dir N_("directory name missing after %s")
1159 #define no_fil N_("file name missing after %s")
1160 #define no_mac N_("macro name missing after %s")
1161 #define no_pth N_("path name missing after %s")
1162 #define no_num N_("number missing after %s")
1163 #define no_tgt N_("target missing after %s")
1165 /* This is the list of all command line options, with the leading
1166 "-" removed. It must be sorted in ASCII collating order. */
1167 #define COMMAND_LINE_OPTIONS \
1168 DEF_OPT("$", 0, OPT_dollar) \
1169 DEF_OPT("+", 0, OPT_plus) \
1170 DEF_OPT("-help", 0, OPT__help) \
1171 DEF_OPT("-target-help", 0, OPT_target__help) \
1172 DEF_OPT("-version", 0, OPT__version) \
1173 DEF_OPT("A", no_ass, OPT_A) \
1174 DEF_OPT("C", 0, OPT_C) \
1175 DEF_OPT("D", no_mac, OPT_D) \
1176 DEF_OPT("H", 0, OPT_H) \
1177 DEF_OPT("I", no_dir, OPT_I) \
1178 DEF_OPT("M", 0, OPT_M) \
1179 DEF_OPT("MD", no_fil, OPT_MD) \
1180 DEF_OPT("MF", no_fil, OPT_MF) \
1181 DEF_OPT("MG", 0, OPT_MG) \
1182 DEF_OPT("MM", 0, OPT_MM) \
1183 DEF_OPT("MMD", no_fil, OPT_MMD) \
1184 DEF_OPT("MP", 0, OPT_MP) \
1185 DEF_OPT("MQ", no_tgt, OPT_MQ) \
1186 DEF_OPT("MT", no_tgt, OPT_MT) \
1187 DEF_OPT("P", 0, OPT_P) \
1188 DEF_OPT("U", no_mac, OPT_U) \
1189 DEF_OPT("W", no_arg, OPT_W) /* arg optional */ \
1190 DEF_OPT("d", no_arg, OPT_d) \
1191 DEF_OPT("fleading-underscore", 0, OPT_fleading_underscore) \
1192 DEF_OPT("fno-leading-underscore", 0, OPT_fno_leading_underscore) \
1193 DEF_OPT("fno-operator-names", 0, OPT_fno_operator_names) \
1194 DEF_OPT("fno-preprocessed", 0, OPT_fno_preprocessed) \
1195 DEF_OPT("fno-show-column", 0, OPT_fno_show_column) \
1196 DEF_OPT("fpreprocessed", 0, OPT_fpreprocessed) \
1197 DEF_OPT("fshow-column", 0, OPT_fshow_column) \
1198 DEF_OPT("fsigned-char", 0, OPT_fsigned_char) \
1199 DEF_OPT("ftabstop=", no_num, OPT_ftabstop) \
1200 DEF_OPT("funsigned-char", 0, OPT_funsigned_char) \
1201 DEF_OPT("h", 0, OPT_h) \
1202 DEF_OPT("idirafter", no_dir, OPT_idirafter) \
1203 DEF_OPT("imacros", no_fil, OPT_imacros) \
1204 DEF_OPT("include", no_fil, OPT_include) \
1205 DEF_OPT("iprefix", no_pth, OPT_iprefix) \
1206 DEF_OPT("isystem", no_dir, OPT_isystem) \
1207 DEF_OPT("iwithprefix", no_dir, OPT_iwithprefix) \
1208 DEF_OPT("iwithprefixbefore", no_dir, OPT_iwithprefixbefore) \
1209 DEF_OPT("lang-asm", 0, OPT_lang_asm) \
1210 DEF_OPT("lang-c", 0, OPT_lang_c) \
1211 DEF_OPT("lang-c++", 0, OPT_lang_cplusplus) \
1212 DEF_OPT("lang-c89", 0, OPT_lang_c89) \
1213 DEF_OPT("lang-objc", 0, OPT_lang_objc) \
1214 DEF_OPT("lang-objc++", 0, OPT_lang_objcplusplus) \
1215 DEF_OPT("nostdinc", 0, OPT_nostdinc) \
1216 DEF_OPT("nostdinc++", 0, OPT_nostdincplusplus) \
1217 DEF_OPT("o", no_fil, OPT_o) \
1218 DEF_OPT("pedantic", 0, OPT_pedantic) \
1219 DEF_OPT("pedantic-errors", 0, OPT_pedantic_errors) \
1220 DEF_OPT("remap", 0, OPT_remap) \
1221 DEF_OPT("std=c++98", 0, OPT_std_cplusplus98) \
1222 DEF_OPT("std=c89", 0, OPT_std_c89) \
1223 DEF_OPT("std=c99", 0, OPT_std_c99) \
1224 DEF_OPT("std=c9x", 0, OPT_std_c9x) \
1225 DEF_OPT("std=gnu89", 0, OPT_std_gnu89) \
1226 DEF_OPT("std=gnu99", 0, OPT_std_gnu99) \
1227 DEF_OPT("std=gnu9x", 0, OPT_std_gnu9x) \
1228 DEF_OPT("std=iso9899:1990", 0, OPT_std_iso9899_1990) \
1229 DEF_OPT("std=iso9899:199409", 0, OPT_std_iso9899_199409) \
1230 DEF_OPT("std=iso9899:1999", 0, OPT_std_iso9899_1999) \
1231 DEF_OPT("std=iso9899:199x", 0, OPT_std_iso9899_199x) \
1232 DEF_OPT("trigraphs", 0, OPT_trigraphs) \
1233 DEF_OPT("v", 0, OPT_v) \
1234 DEF_OPT("version", 0, OPT_version) \
1235 DEF_OPT("w", 0, OPT_w)
1237 #define DEF_OPT(text, msg, code) code,
1240 COMMAND_LINE_OPTIONS
1247 const char *opt_text;
1250 enum opt_code opt_code;
1253 #define DEF_OPT(text, msg, code) { text, msg, sizeof(text) - 1, code },
1255 static struct cl_option cl_options[] =
1257 static const struct cl_option cl_options[] =
1260 COMMAND_LINE_OPTIONS
1263 #undef COMMAND_LINE_OPTIONS
1265 /* Perform a binary search to find which, if any, option the given
1266 command-line matches. Returns its index in the option array,
1267 negative on failure. Complications arise since some options can be
1268 suffixed with an argument, and multiple complete matches can occur,
1269 e.g. -iwithprefix and -iwithprefixbefore. Moreover, we need to
1270 accept options beginning with -W that we do not recognise, but not
1271 to swallow any subsequent command line argument; this is handled as
1272 special cases in cpp_handle_option. */
1274 parse_option (input)
1277 unsigned int md, mn, mx;
1288 opt_len = cl_options[md].opt_len;
1289 comp = memcmp (input, cl_options[md].opt_text, opt_len);
1297 if (input[opt_len] == '\0')
1299 /* We were passed more text. If the option takes an argument,
1300 we may match a later option or we may have been passed the
1301 argument. The longest possible option match succeeds.
1302 If the option takes no arguments we have not matched and
1303 continue the search (e.g. input="stdc++" match was "stdc"). */
1305 if (cl_options[md].msg)
1307 /* Scan forwards. If we get an exact match, return it.
1308 Otherwise, return the longest option-accepting match.
1309 This loops no more than twice with current options. */
1311 for (; mn < (unsigned int) N_OPTS; mn++)
1313 opt_len = cl_options[mn].opt_len;
1314 if (memcmp (input, cl_options[mn].opt_text, opt_len))
1316 if (input[opt_len] == '\0')
1318 if (cl_options[mn].msg)
1329 /* Handle one command-line option in (argc, argv).
1330 Can be called multiple times, to handle multiple sets of options.
1331 If ignore is non-zero, this will ignore unrecognized -W* options.
1332 Returns number of strings consumed. */
1334 cpp_handle_option (pfile, argc, argv, ignore)
1341 struct cpp_pending *pend = CPP_OPTION (pfile, pending);
1343 /* Interpret "-" or a non-option as a file name. */
1344 if (argv[i][0] != '-' || argv[i][1] == '\0')
1346 if (CPP_OPTION (pfile, in_fname) == NULL)
1347 CPP_OPTION (pfile, in_fname) = argv[i];
1348 else if (CPP_OPTION (pfile, out_fname) == NULL)
1349 CPP_OPTION (pfile, out_fname) = argv[i];
1351 cpp_fatal (pfile, "too many filenames. Type %s --help for usage info",
1356 enum opt_code opt_code;
1358 const char *arg = 0;
1360 /* Skip over '-'. */
1361 opt_index = parse_option (&argv[i][1]);
1365 opt_code = cl_options[opt_index].opt_code;
1366 if (cl_options[opt_index].msg)
1368 arg = &argv[i][cl_options[opt_index].opt_len + 1];
1370 /* Yuk. Special case for -W as it must not swallow
1371 up any following argument. If this becomes common, add
1372 another field to the cl_options table. */
1373 if (arg[0] == '\0' && opt_code != OPT_W)
1378 cpp_fatal (pfile, cl_options[opt_index].msg, argv[i - 1]);
1386 case N_OPTS: /* Shut GCC up. */
1388 case OPT_fleading_underscore:
1389 CPP_OPTION (pfile, user_label_prefix) = "_";
1391 case OPT_fno_leading_underscore:
1392 CPP_OPTION (pfile, user_label_prefix) = "";
1394 case OPT_fno_operator_names:
1395 CPP_OPTION (pfile, operator_names) = 0;
1397 case OPT_fpreprocessed:
1398 CPP_OPTION (pfile, preprocessed) = 1;
1400 case OPT_fno_preprocessed:
1401 CPP_OPTION (pfile, preprocessed) = 0;
1403 case OPT_fshow_column:
1404 CPP_OPTION (pfile, show_column) = 1;
1406 case OPT_fno_show_column:
1407 CPP_OPTION (pfile, show_column) = 0;
1409 case OPT_fsigned_char:
1410 CPP_OPTION (pfile, signed_char) = 1;
1412 case OPT_funsigned_char:
1413 CPP_OPTION (pfile, signed_char) = 0;
1416 /* Silently ignore empty string, non-longs and silly values. */
1420 long tabstop = strtol (arg, &endptr, 10);
1421 if (*endptr == '\0' && tabstop >= 1 && tabstop <= 100)
1422 CPP_OPTION (pfile, tabstop) = tabstop;
1426 CPP_OPTION (pfile, inhibit_warnings) = 1;
1431 CPP_OPTION (pfile, help_only) = 1;
1433 case OPT_target__help:
1434 /* Print if any target specific options. cpplib has none, but
1435 make sure help_only gets set. */
1436 CPP_OPTION (pfile, help_only) = 1;
1439 /* --version inhibits compilation, -version doesn't. -v means
1440 verbose and -version. Historical reasons, don't ask. */
1442 CPP_OPTION (pfile, help_only) = 1;
1443 pfile->print_version = 1;
1446 CPP_OPTION (pfile, verbose) = 1;
1447 pfile->print_version = 1;
1450 pfile->print_version = 1;
1454 CPP_OPTION (pfile, discard_comments) = 0;
1457 CPP_OPTION (pfile, no_line_commands) = 1;
1459 case OPT_dollar: /* Don't include $ in identifiers. */
1460 CPP_OPTION (pfile, dollars_in_ident) = 0;
1463 CPP_OPTION (pfile, print_include_names) = 1;
1466 new_pending_directive (pend, arg, cpp_define);
1468 case OPT_pedantic_errors:
1469 CPP_OPTION (pfile, pedantic_errors) = 1;
1472 CPP_OPTION (pfile, pedantic) = 1;
1475 CPP_OPTION (pfile, trigraphs) = 1;
1478 CPP_OPTION (pfile, cplusplus) = 1;
1479 CPP_OPTION (pfile, cplusplus_comments) = 1;
1482 CPP_OPTION (pfile, remap) = 1;
1485 CPP_OPTION (pfile, include_prefix) = arg;
1486 CPP_OPTION (pfile, include_prefix_len) = strlen (arg);
1489 set_lang (pfile, CLK_GNUC89);
1491 case OPT_lang_cplusplus:
1492 set_lang (pfile, CLK_GNUCXX);
1495 set_lang (pfile, CLK_OBJC);
1497 case OPT_lang_objcplusplus:
1498 set_lang (pfile, CLK_OBJCXX);
1501 set_lang (pfile, CLK_ASM);
1503 case OPT_std_cplusplus98:
1504 set_lang (pfile, CLK_CXX98);
1507 set_lang (pfile, CLK_GNUC89);
1511 set_lang (pfile, CLK_GNUC99);
1513 case OPT_std_iso9899_199409:
1514 set_lang (pfile, CLK_STDC94);
1516 case OPT_std_iso9899_1990:
1519 set_lang (pfile, CLK_STDC89);
1521 case OPT_std_iso9899_199x:
1522 case OPT_std_iso9899_1999:
1525 set_lang (pfile, CLK_STDC99);
1528 /* -nostdinc causes no default include directories.
1529 You must specify all include-file directories with -I. */
1530 CPP_OPTION (pfile, no_standard_includes) = 1;
1532 case OPT_nostdincplusplus:
1533 /* -nostdinc++ causes no default C++-specific include directories. */
1534 CPP_OPTION (pfile, no_standard_cplusplus_includes) = 1;
1537 if (CPP_OPTION (pfile, out_fname) == NULL)
1538 CPP_OPTION (pfile, out_fname) = arg;
1541 cpp_fatal (pfile, "output filename specified twice");
1546 /* Args to -d specify what parts of macros to dump.
1547 Silently ignore unrecognised options; they may
1548 be aimed at the compiler proper. */
1552 while ((c = *arg++) != '\0')
1556 CPP_OPTION (pfile, dump_macros) = dump_only;
1557 CPP_OPTION (pfile, no_output) = 1;
1560 CPP_OPTION (pfile, dump_macros) = dump_names;
1563 CPP_OPTION (pfile, dump_macros) = dump_definitions;
1566 CPP_OPTION (pfile, dump_includes) = 1;
1573 CPP_OPTION (pfile, print_deps_missing_files) = 1;
1576 CPP_OPTION (pfile, print_deps) = 2;
1579 CPP_OPTION (pfile, print_deps) = 1;
1582 CPP_OPTION (pfile, deps_file) = arg;
1585 CPP_OPTION (pfile, deps_phony_targets) = 1;
1589 /* Add a target. -MQ quotes for Make. */
1590 deps_add_target (pfile->deps, arg, opt_code == OPT_MQ);
1593 /* -MD and -MMD for cpp0 are deprecated and undocumented
1594 (use -M or -MM with -MF instead), and probably should be
1595 removed with the next major GCC version. For the moment
1596 we allow these for the benefit of Automake 1.4, which
1597 uses these when dependency tracking is enabled. Automake
1598 1.5 will fix this. */
1600 CPP_OPTION (pfile, print_deps) = 2;
1601 CPP_OPTION (pfile, deps_file) = arg;
1604 CPP_OPTION (pfile, print_deps) = 1;
1605 CPP_OPTION (pfile, deps_file) = arg;
1611 /* -A with an argument beginning with '-' acts as
1612 #unassert on whatever immediately follows the '-'.
1613 If "-" is the whole argument, we eliminate all
1614 predefined macros and assertions, including those
1615 that were specified earlier on the command line.
1616 That way we can get rid of any that were passed
1617 automatically in from GCC. */
1621 free_chain (pend->directive_head);
1622 pend->directive_head = NULL;
1623 pend->directive_tail = NULL;
1626 new_pending_directive (pend, arg + 1, cpp_unassert);
1629 new_pending_directive (pend, arg, cpp_assert);
1632 new_pending_directive (pend, arg, cpp_undef);
1634 case OPT_I: /* Add directory to path for includes. */
1635 if (!strcmp (arg, "-"))
1638 Use the preceding -I directories for #include "..."
1639 but not #include <...>.
1640 Don't search the directory of the present file
1641 for #include "...". (Note that -I. -I- is not the same as
1642 the default setup; -I. uses the compiler's working dir.) */
1643 if (! CPP_OPTION (pfile, ignore_srcdir))
1645 pend->quote_head = pend->brack_head;
1646 pend->quote_tail = pend->brack_tail;
1647 pend->brack_head = 0;
1648 pend->brack_tail = 0;
1649 CPP_OPTION (pfile, ignore_srcdir) = 1;
1653 cpp_fatal (pfile, "-I- specified twice");
1658 append_include_chain (pfile, xstrdup (arg), BRACKET, 0);
1661 /* Add directory to beginning of system include path, as a system
1662 include directory. */
1663 append_include_chain (pfile, xstrdup (arg), SYSTEM, 0);
1668 struct pending_option *o = (struct pending_option *)
1669 xmalloc (sizeof (struct pending_option));
1673 if (opt_code == OPT_include)
1674 APPEND (pend, include, o);
1676 APPEND (pend, imacros, o);
1679 case OPT_iwithprefix:
1680 /* Add directory to end of path for includes,
1681 with the default prefix at the front of its name. */
1683 case OPT_iwithprefixbefore:
1684 /* Add directory to main path for includes,
1685 with the default prefix at the front of its name. */
1692 if (CPP_OPTION (pfile, include_prefix) != 0)
1694 size_t ipl = CPP_OPTION (pfile, include_prefix_len);
1695 fname = xmalloc (ipl + len + 1);
1696 memcpy (fname, CPP_OPTION (pfile, include_prefix), ipl);
1697 memcpy (fname + ipl, arg, len + 1);
1699 else if (cpp_GCC_INCLUDE_DIR_len)
1701 fname = xmalloc (cpp_GCC_INCLUDE_DIR_len + len + 1);
1702 memcpy (fname, cpp_GCC_INCLUDE_DIR, cpp_GCC_INCLUDE_DIR_len);
1703 memcpy (fname + cpp_GCC_INCLUDE_DIR_len, arg, len + 1);
1706 fname = xstrdup (arg);
1708 append_include_chain (pfile, fname,
1709 opt_code == OPT_iwithprefix ? SYSTEM: BRACKET, 0);
1713 /* Add directory to end of path for includes. */
1714 append_include_chain (pfile, xstrdup (arg), AFTER, 0);
1717 /* Silently ignore unrecognised options. */
1718 if (!strcmp (argv[i], "-Wall"))
1720 CPP_OPTION (pfile, warn_trigraphs) = 1;
1721 CPP_OPTION (pfile, warn_comments) = 1;
1723 else if (!strcmp (argv[i], "-Wtraditional"))
1724 CPP_OPTION (pfile, warn_traditional) = 1;
1725 else if (!strcmp (argv[i], "-Wtrigraphs"))
1726 CPP_OPTION (pfile, warn_trigraphs) = 1;
1727 else if (!strcmp (argv[i], "-Wcomment"))
1728 CPP_OPTION (pfile, warn_comments) = 1;
1729 else if (!strcmp (argv[i], "-Wcomments"))
1730 CPP_OPTION (pfile, warn_comments) = 1;
1731 else if (!strcmp (argv[i], "-Wundef"))
1732 CPP_OPTION (pfile, warn_undef) = 1;
1733 else if (!strcmp (argv[i], "-Wimport"))
1734 CPP_OPTION (pfile, warn_import) = 1;
1735 else if (!strcmp (argv[i], "-Werror"))
1736 CPP_OPTION (pfile, warnings_are_errors) = 1;
1737 else if (!strcmp (argv[i], "-Wsystem-headers"))
1738 CPP_OPTION (pfile, warn_system_headers) = 1;
1739 else if (!strcmp (argv[i], "-Wendif-labels"))
1740 CPP_OPTION (pfile, warn_endif_labels) = 1;
1741 else if (!strcmp (argv[i], "-Wno-traditional"))
1742 CPP_OPTION (pfile, warn_traditional) = 0;
1743 else if (!strcmp (argv[i], "-Wno-trigraphs"))
1744 CPP_OPTION (pfile, warn_trigraphs) = 0;
1745 else if (!strcmp (argv[i], "-Wno-comment"))
1746 CPP_OPTION (pfile, warn_comments) = 0;
1747 else if (!strcmp (argv[i], "-Wno-comments"))
1748 CPP_OPTION (pfile, warn_comments) = 0;
1749 else if (!strcmp (argv[i], "-Wno-undef"))
1750 CPP_OPTION (pfile, warn_undef) = 0;
1751 else if (!strcmp (argv[i], "-Wno-import"))
1752 CPP_OPTION (pfile, warn_import) = 0;
1753 else if (!strcmp (argv[i], "-Wno-error"))
1754 CPP_OPTION (pfile, warnings_are_errors) = 0;
1755 else if (!strcmp (argv[i], "-Wno-system-headers"))
1756 CPP_OPTION (pfile, warn_system_headers) = 0;
1757 else if (!strcmp (argv[i], "-Wno-endif-labels"))
1758 CPP_OPTION (pfile, warn_endif_labels) = 0;
1767 /* Handle command-line options in (argc, argv).
1768 Can be called multiple times, to handle multiple sets of options.
1769 Returns if an unrecognized option is seen.
1770 Returns number of strings consumed. */
1772 cpp_handle_options (pfile, argc, argv)
1778 int strings_processed;
1780 for (i = 0; i < argc; i += strings_processed)
1782 strings_processed = cpp_handle_option (pfile, argc - i, argv + i, 1);
1783 if (strings_processed == 0)
1790 /* Extra processing when all options are parsed, after all calls to
1791 cpp_handle_option[s]. Consistency checks etc. */
1793 cpp_post_options (pfile)
1796 if (pfile->print_version)
1798 fprintf (stderr, _("GNU CPP version %s (cpplib)"), version_string);
1799 #ifdef TARGET_VERSION
1802 fputc ('\n', stderr);
1805 /* Canonicalize in_fname and out_fname. We guarantee they are not
1806 NULL, and that the empty string represents stdin / stdout. */
1807 if (CPP_OPTION (pfile, in_fname) == NULL
1808 || !strcmp (CPP_OPTION (pfile, in_fname), "-"))
1809 CPP_OPTION (pfile, in_fname) = "";
1811 if (CPP_OPTION (pfile, out_fname) == NULL
1812 || !strcmp (CPP_OPTION (pfile, out_fname), "-"))
1813 CPP_OPTION (pfile, out_fname) = "";
1815 /* -Wtraditional is not useful in C++ mode. */
1816 if (CPP_OPTION (pfile, cplusplus))
1817 CPP_OPTION (pfile, warn_traditional) = 0;
1819 /* Set this if it hasn't been set already. */
1820 if (CPP_OPTION (pfile, user_label_prefix) == NULL)
1821 CPP_OPTION (pfile, user_label_prefix) = USER_LABEL_PREFIX;
1823 /* Permanently disable macro expansion if we are rescanning
1824 preprocessed text. */
1825 if (CPP_OPTION (pfile, preprocessed))
1826 pfile->state.prevent_expansion = 1;
1828 /* We need to do this after option processing and before
1829 cpp_start_read, as cppmain.c relies on the options->no_output to
1830 set its callbacks correctly before calling cpp_start_read. */
1831 init_dependency_output (pfile);
1833 /* After checking the environment variables, check if -M or -MM has
1834 not been specified, but other -M options have. */
1835 if (CPP_OPTION (pfile, print_deps) == 0 &&
1836 (CPP_OPTION (pfile, print_deps_missing_files)
1837 || CPP_OPTION (pfile, deps_file)
1838 || CPP_OPTION (pfile, deps_phony_targets)))
1839 cpp_fatal (pfile, "you must additionally specify either -M or -MM");
1841 /* Some things should always be on in pedantic mode. */
1842 if (CPP_OPTION (pfile, pedantic) == 1)
1843 CPP_OPTION (pfile, warn_endif_labels) = 1;
1846 /* Set up dependency-file output. On exit, if print_deps is non-zero
1847 then deps_file is not NULL; stdout is the empty string. */
1849 init_dependency_output (pfile)
1852 char *spec, *s, *output_file;
1854 /* Either of two environment variables can specify output of deps.
1855 Its value is either "OUTPUT_FILE" or "OUTPUT_FILE DEPS_TARGET",
1856 where OUTPUT_FILE is the file to write deps info to
1857 and DEPS_TARGET is the target to mention in the deps. */
1859 if (CPP_OPTION (pfile, print_deps) == 0)
1861 spec = getenv ("DEPENDENCIES_OUTPUT");
1863 CPP_OPTION (pfile, print_deps) = 1;
1866 spec = getenv ("SUNPRO_DEPENDENCIES");
1868 CPP_OPTION (pfile, print_deps) = 2;
1873 /* Find the space before the DEPS_TARGET, if there is one. */
1874 s = strchr (spec, ' ');
1877 /* Let the caller perform MAKE quoting. */
1878 deps_add_target (pfile->deps, s + 1, 0);
1879 output_file = (char *) xmalloc (s - spec + 1);
1880 memcpy (output_file, spec, s - spec);
1881 output_file[s - spec] = 0;
1886 /* Command line -MF overrides environment variables and default. */
1887 if (CPP_OPTION (pfile, deps_file) == 0)
1888 CPP_OPTION (pfile, deps_file) = output_file;
1890 CPP_OPTION (pfile, print_deps_append) = 1;
1892 else if (CPP_OPTION (pfile, deps_file) == 0)
1893 /* If -M or -MM was seen without -MF, default output to wherever
1894 was specified with -o. out_fname is non-NULL here. */
1895 CPP_OPTION (pfile, deps_file) = CPP_OPTION (pfile, out_fname);
1897 /* When doing dependencies, suppress normal preprocessed output.
1898 Still do -dM, -dI etc. as e.g. glibc depends on this. */
1899 CPP_OPTION (pfile, no_output) = 1;
1902 /* Handle --help output. */
1906 /* To keep the lines from getting too long for some compilers, limit
1907 to about 500 characters (6 lines) per chunk. */
1910 -include <file> Include the contents of <file> before other files\n\
1911 -imacros <file> Accept definition of macros in <file>\n\
1912 -iprefix <path> Specify <path> as a prefix for next two options\n\
1913 -iwithprefix <dir> Add <dir> to the end of the system include path\n\
1914 -iwithprefixbefore <dir> Add <dir> to the end of the main include path\n\
1915 -isystem <dir> Add <dir> to the start of the system include path\n\
1918 -idirafter <dir> Add <dir> to the end of the system include path\n\
1919 -I <dir> Add <dir> to the end of the main include path\n\
1920 -I- Fine-grained include path control; see info docs\n\
1921 -nostdinc Do not search system include directories\n\
1922 (dirs specified with -isystem will still be used)\n\
1923 -nostdinc++ Do not search system include directories for C++\n\
1924 -o <file> Put output into <file>\n\
1927 -pedantic Issue all warnings demanded by strict ISO C\n\
1928 -pedantic-errors Issue -pedantic warnings as errors instead\n\
1929 -trigraphs Support ISO C trigraphs\n\
1930 -lang-c Assume that the input sources are in C\n\
1931 -lang-c89 Assume that the input sources are in C89\n\
1934 -lang-c++ Assume that the input sources are in C++\n\
1935 -lang-objc Assume that the input sources are in ObjectiveC\n\
1936 -lang-objc++ Assume that the input sources are in ObjectiveC++\n\
1937 -lang-asm Assume that the input sources are in assembler\n\
1940 -std=<std name> Specify the conformance standard; one of:\n\
1941 gnu89, gnu99, c89, c99, iso9899:1990,\n\
1942 iso9899:199409, iso9899:1999\n\
1943 -+ Allow parsing of C++ style features\n\
1944 -w Inhibit warning messages\n\
1945 -Wtrigraphs Warn if trigraphs are encountered\n\
1946 -Wno-trigraphs Do not warn about trigraphs\n\
1947 -Wcomment{s} Warn if one comment starts inside another\n\
1950 -Wno-comment{s} Do not warn about comments\n\
1951 -Wtraditional Warn about features not present in traditional C\n\
1952 -Wno-traditional Do not warn about traditional C\n\
1953 -Wundef Warn if an undefined macro is used by #if\n\
1954 -Wno-undef Do not warn about testing undefined macros\n\
1955 -Wimport Warn about the use of the #import directive\n\
1958 -Wno-import Do not warn about the use of #import\n\
1959 -Werror Treat all warnings as errors\n\
1960 -Wno-error Do not treat warnings as errors\n\
1961 -Wsystem-headers Do not suppress warnings from system headers\n\
1962 -Wno-system-headers Suppress warnings from system headers\n\
1963 -Wall Enable all preprocessor warnings\n\
1966 -M Generate make dependencies\n\
1967 -MM As -M, but ignore system header files\n\
1968 -MD Generate make dependencies and compile\n\
1969 -MMD As -MD, but ignore system header files\n\
1970 -MF <file> Write dependency output to the given file\n\
1971 -MG Treat missing header file as generated files\n\
1974 -MP Generate phony targets for all headers\n\
1975 -MQ <target> Add a MAKE-quoted target\n\
1976 -MT <target> Add an unquoted target\n\
1979 -D<macro> Define a <macro> with string '1' as its value\n\
1980 -D<macro>=<val> Define a <macro> with <val> as its value\n\
1981 -A<question>=<answer> Assert the <answer> to <question>\n\
1982 -A-<question>=<answer> Disable the <answer> to <question>\n\
1983 -U<macro> Undefine <macro> \n\
1984 -v Display the version number\n\
1987 -H Print the name of header files as they are used\n\
1988 -C Do not discard comments\n\
1989 -dM Display a list of macro definitions active at end\n\
1990 -dD Preserve macro definitions in output\n\
1991 -dN As -dD except that only the names are preserved\n\
1992 -dI Include #include directives in the output\n\
1995 -fpreprocessed Treat the input file as already preprocessed\n\
1996 -ftabstop=<number> Distance between tab stops for column reporting\n\
1997 -P Do not generate #line directives\n\
1998 -$ Do not allow '$' in identifiers\n\
1999 -remap Remap file names when including files\n\
2000 --version Display version information\n\
2001 -h or --help Display this information\n\