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 uchar _cpp_trigraph_map[UCHAR_MAX + 1] = {
136 #define s(p, v) [p] = v,
140 #define TRIGRAPH_MAP uchar _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_errno (pfile, DL_ERROR, 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_error_with_line (pfile, DL_ERROR, 0, 0, "%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)
311 cpp_error (pfile, DL_WARNING,
312 "changing search order for system directory \"%s\"",
314 if (strcmp (cur->name, other->name))
315 cpp_error (pfile, DL_WARNING,
316 " as it is the same as non-system directory \"%s\"",
319 cpp_error (pfile, DL_WARNING,
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, warn_multichar) = 1;
491 CPP_OPTION (pfile, discard_comments) = 1;
492 CPP_OPTION (pfile, discard_comments_in_macro_exp) = 1;
493 CPP_OPTION (pfile, show_column) = 1;
494 CPP_OPTION (pfile, tabstop) = 8;
495 CPP_OPTION (pfile, operator_names) = 1;
496 CPP_OPTION (pfile, warn_endif_labels) = 1;
497 #if DEFAULT_SIGNED_CHAR
498 CPP_OPTION (pfile, signed_char) = 1;
500 CPP_OPTION (pfile, signed_char) = 0;
503 CPP_OPTION (pfile, pending) =
504 (struct cpp_pending *) xcalloc (1, sizeof (struct cpp_pending));
506 /* Default CPP arithmetic to something sensible for the host for the
507 benefit of dumb users like fix-header. */
508 #define BITS_PER_HOST_WIDEST_INT (CHAR_BIT * sizeof (HOST_WIDEST_INT))
509 CPP_OPTION (pfile, precision) = BITS_PER_HOST_WIDEST_INT;
510 CPP_OPTION (pfile, char_precision) = CHAR_BIT;
511 CPP_OPTION (pfile, wchar_precision) = CHAR_BIT * sizeof (int);
512 CPP_OPTION (pfile, int_precision) = CHAR_BIT * sizeof (int);
514 /* It's simplest to just create this struct whether or not it will
516 pfile->deps = deps_init ();
518 /* Initialise the line map. Start at logical line 1, so we can use
519 a line number of zero for special states. */
520 init_line_maps (&pfile->line_maps);
523 /* Initialize lexer state. */
524 pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments);
526 /* Set up static tokens. */
527 pfile->date.type = CPP_EOF;
528 pfile->avoid_paste.type = CPP_PADDING;
529 pfile->avoid_paste.val.source = NULL;
530 pfile->eof.type = CPP_EOF;
531 pfile->eof.flags = 0;
533 /* Create a token buffer for the lexer. */
534 _cpp_init_tokenrun (&pfile->base_run, 250);
535 pfile->cur_run = &pfile->base_run;
536 pfile->cur_token = pfile->base_run.base;
538 /* Initialise the base context. */
539 pfile->context = &pfile->base_context;
540 pfile->base_context.macro = 0;
541 pfile->base_context.prev = pfile->base_context.next = 0;
543 /* Aligned and unaligned storage. */
544 pfile->a_buff = _cpp_get_buff (pfile, 0);
545 pfile->u_buff = _cpp_get_buff (pfile, 0);
547 /* The expression parser stack. */
548 _cpp_expand_op_stack (pfile);
550 /* Initialise the buffer obstack. */
551 gcc_obstack_init (&pfile->buffer_ob);
553 _cpp_init_includes (pfile);
558 /* Free resources used by PFILE. Accessing PFILE after this function
559 returns leads to undefined behaviour. Returns the error count. */
565 struct search_path *dir, *dirn;
566 cpp_context *context, *contextn;
567 tokenrun *run, *runn;
569 free_chain (CPP_OPTION (pfile, pending)->include_head);
570 free (CPP_OPTION (pfile, pending));
571 free (pfile->op_stack);
573 while (CPP_BUFFER (pfile) != NULL)
574 _cpp_pop_buffer (pfile);
576 if (pfile->macro_buffer)
578 free ((PTR) pfile->macro_buffer);
579 pfile->macro_buffer = NULL;
580 pfile->macro_buffer_len = 0;
583 deps_free (pfile->deps);
584 obstack_free (&pfile->buffer_ob, 0);
586 _cpp_destroy_hashtable (pfile);
587 _cpp_cleanup_includes (pfile);
589 _cpp_free_buff (pfile->a_buff);
590 _cpp_free_buff (pfile->u_buff);
591 _cpp_free_buff (pfile->free_buffs);
593 for (run = &pfile->base_run; run; run = runn)
597 if (run != &pfile->base_run)
601 for (dir = CPP_OPTION (pfile, quote_include); dir; dir = dirn)
604 free ((PTR) dir->name);
608 for (context = pfile->base_context.next; context; context = contextn)
610 contextn = context->next;
614 free_line_maps (&pfile->line_maps);
616 result = pfile->errors;
623 /* This structure defines one built-in identifier. A node will be
624 entered in the hash table under the name NAME, with value VALUE (if
625 any). If flags has OPERATOR, the node's operator field is used; if
626 flags has BUILTIN the node's builtin field is used. Macros that are
627 known at build time should not be flagged BUILTIN, as then they do
628 not appear in macro dumps with e.g. -dM or -dD.
630 Two values are not compile time constants, so we tag
631 them in the FLAGS field instead:
632 VERS value is the global version_string, quoted
633 ULP value is the global user_label_prefix
635 Also, macros with CPLUS set in the flags field are entered only for C++. */
640 unsigned char builtin;
641 unsigned char operator;
642 unsigned short flags;
649 #define OPERATOR 0x10
651 #define B(n, t) { U n, 0, t, 0, BUILTIN, sizeof n - 1 }
652 #define C(n, v) { U n, v, 0, 0, 0, sizeof n - 1 }
653 #define X(n, f) { U n, 0, 0, 0, f, sizeof n - 1 }
654 #define O(n, c, f) { U n, 0, 0, c, OPERATOR | f, sizeof n - 1 }
655 static const struct builtin builtin_array[] =
657 B("__TIME__", BT_TIME),
658 B("__DATE__", BT_DATE),
659 B("__FILE__", BT_FILE),
660 B("__BASE_FILE__", BT_BASE_FILE),
661 B("__LINE__", BT_SPECLINE),
662 B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL),
663 B("_Pragma", BT_PRAGMA),
665 X("__VERSION__", VERS),
666 X("__USER_LABEL_PREFIX__", ULP),
667 C("__REGISTER_PREFIX__", REGISTER_PREFIX),
668 C("__HAVE_BUILTIN_SETJMP__", "1"),
669 #if USING_SJLJ_EXCEPTIONS
670 /* libgcc needs to know this. */
671 C("__USING_SJLJ_EXCEPTIONS__","1"),
673 #ifndef NO_BUILTIN_SIZE_TYPE
674 C("__SIZE_TYPE__", SIZE_TYPE),
676 #ifndef NO_BUILTIN_PTRDIFF_TYPE
677 C("__PTRDIFF_TYPE__", PTRDIFF_TYPE),
679 #ifndef NO_BUILTIN_WCHAR_TYPE
680 C("__WCHAR_TYPE__", WCHAR_TYPE),
682 #ifndef NO_BUILTIN_WINT_TYPE
683 C("__WINT_TYPE__", WINT_TYPE),
685 #ifdef STDC_0_IN_SYSTEM_HEADERS
686 B("__STDC__", BT_STDC),
691 /* Named operators known to the preprocessor. These cannot be #defined
692 and always have their stated meaning. They are treated like normal
693 identifiers except for the type code and the meaning. Most of them
694 are only for C++ (but see iso646.h). */
695 O("and", CPP_AND_AND, CPLUS),
696 O("and_eq", CPP_AND_EQ, CPLUS),
697 O("bitand", CPP_AND, CPLUS),
698 O("bitor", CPP_OR, CPLUS),
699 O("compl", CPP_COMPL, CPLUS),
700 O("not", CPP_NOT, CPLUS),
701 O("not_eq", CPP_NOT_EQ, CPLUS),
702 O("or", CPP_OR_OR, CPLUS),
703 O("or_eq", CPP_OR_EQ, CPLUS),
704 O("xor", CPP_XOR, CPLUS),
705 O("xor_eq", CPP_XOR_EQ, CPLUS)
711 #define builtin_array_end (builtin_array + ARRAY_SIZE (builtin_array))
713 /* Subroutine of cpp_read_main_file; reads the builtins table above and
714 enters them, and language-specific macros, into the hash table. */
716 init_builtins (pfile)
719 const struct builtin *b;
721 for(b = builtin_array; b < builtin_array_end; b++)
723 if ((b->flags & CPLUS) && ! CPP_OPTION (pfile, cplusplus))
726 if ((b->flags & OPERATOR) && ! CPP_OPTION (pfile, operator_names))
729 if (b->flags & (OPERATOR | BUILTIN))
731 cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len);
732 if (b->flags & OPERATOR)
734 hp->flags |= NODE_OPERATOR;
735 hp->value.operator = b->operator;
740 hp->flags |= NODE_BUILTIN | NODE_WARN;
741 hp->value.builtin = b->builtin;
744 else /* A standard macro of some kind. */
751 /* Allocate enough space for 'name "value"\n\0'. */
752 str = alloca (b->len + strlen (version_string) + 5);
753 sprintf (str, "%s \"%s\"\n", b->name, version_string);
758 val = CPP_OPTION (pfile, user_label_prefix);
762 /* Allocate enough space for "name value\n\0". */
763 str = alloca (b->len + strlen (val) + 3);
764 sprintf(str, "%s %s\n", b->name, val);
767 _cpp_define_builtin (pfile, str);
771 if (CPP_OPTION (pfile, cplusplus))
772 _cpp_define_builtin (pfile, "__cplusplus 1");
774 if (CPP_OPTION (pfile, objc))
775 _cpp_define_builtin (pfile, "__OBJC__ 1");
777 if (CPP_OPTION (pfile, lang) == CLK_STDC94)
778 _cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L");
779 else if (CPP_OPTION (pfile, c99))
780 _cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L");
782 if (CPP_OPTION (pfile, signed_char) == 0)
783 _cpp_define_builtin (pfile, "__CHAR_UNSIGNED__ 1");
785 if (CPP_OPTION (pfile, lang) == CLK_STDC89
786 || CPP_OPTION (pfile, lang) == CLK_STDC94
787 || CPP_OPTION (pfile, lang) == CLK_STDC99)
788 _cpp_define_builtin (pfile, "__STRICT_ANSI__ 1");
789 else if (CPP_OPTION (pfile, lang) == CLK_ASM)
790 _cpp_define_builtin (pfile, "__ASSEMBLER__ 1");
792 if (pfile->cb.register_builtins)
793 (*pfile->cb.register_builtins) (pfile);
800 #undef builtin_array_end
802 /* And another subroutine. This one sets up the standard include path. */
804 init_standard_includes (pfile)
808 const struct default_include *p;
809 const char *specd_prefix = CPP_OPTION (pfile, include_prefix);
811 /* Several environment variables may add to the include search path.
812 CPATH specifies an additional list of directories to be searched
813 as if specified with -I, while C_INCLUDE_PATH, CPLUS_INCLUDE_PATH,
814 etc. specify an additional list of directories to be searched as
815 if specified with -isystem, for the language indicated. */
817 GET_ENV_PATH_LIST (path, "CPATH");
818 if (path != 0 && *path != 0)
819 path_include (pfile, path, BRACKET);
821 switch ((CPP_OPTION (pfile, objc) << 1) + CPP_OPTION (pfile, cplusplus))
824 GET_ENV_PATH_LIST (path, "C_INCLUDE_PATH");
827 GET_ENV_PATH_LIST (path, "CPLUS_INCLUDE_PATH");
830 GET_ENV_PATH_LIST (path, "OBJC_INCLUDE_PATH");
833 GET_ENV_PATH_LIST (path, "OBJCPLUS_INCLUDE_PATH");
836 if (path != 0 && *path != 0)
837 path_include (pfile, path, SYSTEM);
839 /* Search "translated" versions of GNU directories.
840 These have /usr/local/lib/gcc... replaced by specd_prefix. */
841 if (specd_prefix != 0 && cpp_GCC_INCLUDE_DIR_len)
843 /* Remove the `include' from /usr/local/lib/gcc.../include.
844 GCC_INCLUDE_DIR will always end in /include. */
845 int default_len = cpp_GCC_INCLUDE_DIR_len;
846 char *default_prefix = (char *) alloca (default_len + 1);
847 int specd_len = strlen (specd_prefix);
849 memcpy (default_prefix, cpp_GCC_INCLUDE_DIR, default_len);
850 default_prefix[default_len] = '\0';
852 for (p = cpp_include_defaults; p->fname; p++)
854 /* Some standard dirs are only for C++. */
856 || (CPP_OPTION (pfile, cplusplus)
857 && !CPP_OPTION (pfile, no_standard_cplusplus_includes)))
859 /* Does this dir start with the prefix? */
860 if (!memcmp (p->fname, default_prefix, default_len))
862 /* Yes; change prefix and add to search list. */
863 int flen = strlen (p->fname);
864 int this_len = specd_len + flen - default_len;
865 char *str = (char *) xmalloc (this_len + 1);
866 memcpy (str, specd_prefix, specd_len);
867 memcpy (str + specd_len,
868 p->fname + default_len,
869 flen - default_len + 1);
871 append_include_chain (pfile, str, SYSTEM, p->cxx_aware);
877 /* Search ordinary names for GNU include directories. */
878 for (p = cpp_include_defaults; p->fname; p++)
880 /* Some standard dirs are only for C++. */
882 || (CPP_OPTION (pfile, cplusplus)
883 && !CPP_OPTION (pfile, no_standard_cplusplus_includes)))
885 char *str = update_path (p->fname, p->component);
886 append_include_chain (pfile, str, SYSTEM, p->cxx_aware);
891 /* Pushes a command line -imacro and -include file indicated by P onto
892 the buffer stack. Returns non-zero if successful. */
894 push_include (pfile, p)
896 struct pending_option *p;
900 /* Later: maybe update this to use the #include "" search path
901 if cpp_read_file fails. */
902 header.type = CPP_STRING;
903 header.val.str.text = (const unsigned char *) p->arg;
904 header.val.str.len = strlen (p->arg);
905 /* Make the command line directive take up a line. */
908 return _cpp_execute_include (pfile, &header, IT_CMDLINE);
911 /* Frees a pending_option chain. */
914 struct pending_option *head;
916 struct pending_option *next;
926 /* Sanity-checks are dependent on command-line options, so it is
927 called as a subroutine of cpp_read_main_file (). */
929 static void sanity_checks PARAMS ((cpp_reader *));
930 static void sanity_checks (pfile)
935 /* Sanity checks for assumptions about CPP arithmetic and target
936 type precisions made by cpplib. */
939 cpp_error (pfile, DL_FATAL, "cppchar_t must be an unsigned type");
941 if (CPP_OPTION (pfile, precision) > BITS_PER_HOST_WIDEST_INT)
942 cpp_error (pfile, DL_FATAL,
943 "preprocessor arithmetic has maximum precision of %u bits; target requires %u bits",
944 BITS_PER_HOST_WIDEST_INT, CPP_OPTION (pfile, precision));
946 if (CPP_OPTION (pfile, precision) < CPP_OPTION (pfile, int_precision))
947 cpp_error (pfile, DL_FATAL,
948 "CPP arithmetic must be at least as precise as a target int");
950 if (CPP_OPTION (pfile, char_precision) < 8)
951 cpp_error (pfile, DL_FATAL, "target char is less than 8 bits wide");
953 if (CPP_OPTION (pfile, wchar_precision) < CPP_OPTION (pfile, char_precision))
954 cpp_error (pfile, DL_FATAL,
955 "target wchar_t is narrower than target char");
957 if (CPP_OPTION (pfile, int_precision) < CPP_OPTION (pfile, char_precision))
958 cpp_error (pfile, DL_FATAL,
959 "target int is narrower than target char");
961 if (CPP_OPTION (pfile, wchar_precision) > BITS_PER_CPPCHAR_T)
962 cpp_error (pfile, DL_FATAL,
963 "CPP on this host cannot handle wide character constants over %u bits, but the target requires %u bits",
964 BITS_PER_CPPCHAR_T, CPP_OPTION (pfile, wchar_precision));
967 # define sanity_checks(PFILE)
970 /* This is called after options have been parsed, and partially
971 processed. Setup for processing input from the file named FNAME,
972 or stdin if it is the empty string. Return the original filename
973 on success (e.g. foo.i->foo.c), or NULL on failure. */
975 cpp_read_main_file (pfile, fname, table)
980 sanity_checks (pfile);
982 /* The front ends don't set up the hash table until they have
983 finished processing the command line options, so initializing the
984 hashtable is deferred until now. */
985 _cpp_init_hashtable (pfile, table);
987 /* Set up the include search path now. */
988 if (! CPP_OPTION (pfile, no_standard_includes))
989 init_standard_includes (pfile);
991 merge_include_chains (pfile);
993 /* With -v, print the list of dirs to search. */
994 if (CPP_OPTION (pfile, verbose))
996 struct search_path *l;
997 fprintf (stderr, _("#include \"...\" search starts here:\n"));
998 for (l = CPP_OPTION (pfile, quote_include); l; l = l->next)
1000 if (l == CPP_OPTION (pfile, bracket_include))
1001 fprintf (stderr, _("#include <...> search starts here:\n"));
1002 fprintf (stderr, " %s\n", l->name);
1004 fprintf (stderr, _("End of search list.\n"));
1007 if (CPP_OPTION (pfile, print_deps))
1008 /* Set the default target (if there is none already). */
1009 deps_add_default_target (pfile->deps, fname);
1011 /* Open the main input file. */
1012 if (!_cpp_read_file (pfile, fname))
1015 /* Set this after cpp_post_options so the client can change the
1016 option if it wishes, and after stacking the main file so we don't
1017 trace the main file. */
1018 pfile->line_maps.trace_includes = CPP_OPTION (pfile, print_include_names);
1020 /* For foo.i, read the original filename foo.c now, for the benefit
1021 of the front ends. */
1022 if (CPP_OPTION (pfile, preprocessed))
1023 read_original_filename (pfile);
1025 return pfile->map->to_file;
1028 /* For preprocessed files, if the first tokens are of the form # NUM.
1029 handle the directive so we know the original file name. This will
1030 generate file_change callbacks, which the front ends must handle
1031 appropriately given their state of initialization. */
1033 read_original_filename (pfile)
1036 const cpp_token *token, *token1;
1038 /* Lex ahead; if the first tokens are of the form # NUM, then
1039 process the directive, otherwise back up. */
1040 token = _cpp_lex_direct (pfile);
1041 if (token->type == CPP_HASH)
1043 token1 = _cpp_lex_direct (pfile);
1044 _cpp_backup_tokens (pfile, 1);
1046 /* If it's a #line directive, handle it. */
1047 if (token1->type == CPP_NUMBER)
1049 _cpp_handle_directive (pfile, token->flags & PREV_WHITE);
1054 /* Backup as if nothing happened. */
1055 _cpp_backup_tokens (pfile, 1);
1058 /* Handle pending command line options: -D, -U, -A, -imacros and
1059 -include. This should be called after debugging has been properly
1060 set up in the front ends. */
1062 cpp_finish_options (pfile)
1065 /* Install builtins and process command line macros etc. in the order
1066 they appeared, but only if not already preprocessed. */
1067 if (! CPP_OPTION (pfile, preprocessed))
1069 struct pending_option *p;
1071 _cpp_do_file_change (pfile, LC_RENAME, _("<built-in>"), 1, 0);
1072 init_builtins (pfile);
1073 _cpp_do_file_change (pfile, LC_RENAME, _("<command line>"), 1, 0);
1074 for (p = CPP_OPTION (pfile, pending)->directive_head; p; p = p->next)
1075 (*p->handler) (pfile, p->arg);
1077 /* Scan -imacros files after -D, -U, but before -include.
1078 pfile->next_include_file is NULL, so _cpp_pop_buffer does not
1079 push -include files. */
1080 for (p = CPP_OPTION (pfile, pending)->imacros_head; p; p = p->next)
1081 if (push_include (pfile, p))
1082 cpp_scan_nooutput (pfile);
1084 pfile->next_include_file = &CPP_OPTION (pfile, pending)->include_head;
1085 _cpp_maybe_push_include_file (pfile);
1088 free_chain (CPP_OPTION (pfile, pending)->imacros_head);
1089 free_chain (CPP_OPTION (pfile, pending)->directive_head);
1092 /* Push the next buffer on the stack given by -include, if any. */
1094 _cpp_maybe_push_include_file (pfile)
1097 if (pfile->next_include_file)
1099 struct pending_option *head = *pfile->next_include_file;
1101 while (head && !push_include (pfile, head))
1105 pfile->next_include_file = &head->next;
1108 /* All done; restore the line map from <command line>. */
1109 _cpp_do_file_change (pfile, LC_RENAME,
1110 pfile->line_maps.maps[0].to_file, 1, 0);
1111 /* Don't come back here again. */
1112 pfile->next_include_file = NULL;
1117 /* Use mkdeps.c to output dependency information. */
1122 /* Stream on which to print the dependency information. */
1123 FILE *deps_stream = 0;
1124 const char *const deps_mode =
1125 CPP_OPTION (pfile, print_deps_append) ? "a" : "w";
1127 if (CPP_OPTION (pfile, deps_file)[0] == '\0')
1128 deps_stream = stdout;
1131 deps_stream = fopen (CPP_OPTION (pfile, deps_file), deps_mode);
1132 if (deps_stream == 0)
1134 cpp_errno (pfile, DL_ERROR, CPP_OPTION (pfile, deps_file));
1139 deps_write (pfile->deps, deps_stream, 72);
1141 if (CPP_OPTION (pfile, deps_phony_targets))
1142 deps_phony_targets (pfile->deps, deps_stream);
1144 /* Don't close stdout. */
1145 if (deps_stream != stdout)
1147 if (ferror (deps_stream) || fclose (deps_stream) != 0)
1148 cpp_error (pfile, DL_FATAL, "I/O error on output");
1152 /* This is called at the end of preprocessing. It pops the
1153 last buffer and writes dependency output. It should also
1154 clear macro definitions, such that you could call cpp_start_read
1155 with a new filename to restart processing. */
1160 /* cpplex.c leaves the final buffer on the stack. This it so that
1161 it returns an unending stream of CPP_EOFs to the client. If we
1162 popped the buffer, we'd dereference a NULL buffer pointer and
1163 segfault. It's nice to allow the client to do worry-free excess
1164 cpp_get_token calls. */
1165 while (pfile->buffer)
1166 _cpp_pop_buffer (pfile);
1168 /* Don't write the deps file if preprocessing has failed. */
1169 if (CPP_OPTION (pfile, print_deps) && pfile->errors == 0)
1170 output_deps (pfile);
1172 /* Report on headers that could use multiple include guards. */
1173 if (CPP_OPTION (pfile, print_include_names))
1174 _cpp_report_missing_guards (pfile);
1177 /* Add a directive to be handled later in the initialization phase. */
1179 new_pending_directive (pend, text, handler)
1180 struct cpp_pending *pend;
1182 cl_directive_handler handler;
1184 struct pending_option *o = (struct pending_option *)
1185 xmalloc (sizeof (struct pending_option));
1189 o->handler = handler;
1190 APPEND (pend, directive, o);
1193 /* Irix6 "cc -n32" and OSF4 cc have problems with char foo[] = ("string");
1194 I.e. a const string initializer with parens around it. That is
1195 what N_("string") resolves to, so we make no_* be macros instead. */
1196 #define no_arg N_("argument missing after %s")
1197 #define no_ass N_("assertion missing after %s")
1198 #define no_dir N_("directory name missing after %s")
1199 #define no_fil N_("file name missing after %s")
1200 #define no_mac N_("macro name missing after %s")
1201 #define no_pth N_("path name missing after %s")
1202 #define no_num N_("number missing after %s")
1203 #define no_tgt N_("target missing after %s")
1205 /* This is the list of all command line options, with the leading
1206 "-" removed. It must be sorted in ASCII collating order. */
1207 #define COMMAND_LINE_OPTIONS \
1208 DEF_OPT("$", 0, OPT_dollar) \
1209 DEF_OPT("+", 0, OPT_plus) \
1210 DEF_OPT("-help", 0, OPT__help) \
1211 DEF_OPT("-target-help", 0, OPT_target__help) \
1212 DEF_OPT("-version", 0, OPT__version) \
1213 DEF_OPT("A", no_ass, OPT_A) \
1214 DEF_OPT("C", 0, OPT_C) \
1215 DEF_OPT("CC", 0, OPT_CC) \
1216 DEF_OPT("D", no_mac, OPT_D) \
1217 DEF_OPT("H", 0, OPT_H) \
1218 DEF_OPT("I", no_dir, OPT_I) \
1219 DEF_OPT("M", 0, OPT_M) \
1220 DEF_OPT("MD", no_fil, OPT_MD) \
1221 DEF_OPT("MF", no_fil, OPT_MF) \
1222 DEF_OPT("MG", 0, OPT_MG) \
1223 DEF_OPT("MM", 0, OPT_MM) \
1224 DEF_OPT("MMD", no_fil, OPT_MMD) \
1225 DEF_OPT("MP", 0, OPT_MP) \
1226 DEF_OPT("MQ", no_tgt, OPT_MQ) \
1227 DEF_OPT("MT", no_tgt, OPT_MT) \
1228 DEF_OPT("P", 0, OPT_P) \
1229 DEF_OPT("U", no_mac, OPT_U) \
1230 DEF_OPT("W", no_arg, OPT_W) /* arg optional */ \
1231 DEF_OPT("d", no_arg, OPT_d) \
1232 DEF_OPT("fleading-underscore", 0, OPT_fleading_underscore) \
1233 DEF_OPT("fno-leading-underscore", 0, OPT_fno_leading_underscore) \
1234 DEF_OPT("fno-operator-names", 0, OPT_fno_operator_names) \
1235 DEF_OPT("fno-preprocessed", 0, OPT_fno_preprocessed) \
1236 DEF_OPT("fno-show-column", 0, OPT_fno_show_column) \
1237 DEF_OPT("fpreprocessed", 0, OPT_fpreprocessed) \
1238 DEF_OPT("fshow-column", 0, OPT_fshow_column) \
1239 DEF_OPT("fsigned-char", 0, OPT_fsigned_char) \
1240 DEF_OPT("ftabstop=", no_num, OPT_ftabstop) \
1241 DEF_OPT("funsigned-char", 0, OPT_funsigned_char) \
1242 DEF_OPT("h", 0, OPT_h) \
1243 DEF_OPT("idirafter", no_dir, OPT_idirafter) \
1244 DEF_OPT("imacros", no_fil, OPT_imacros) \
1245 DEF_OPT("include", no_fil, OPT_include) \
1246 DEF_OPT("iprefix", no_pth, OPT_iprefix) \
1247 DEF_OPT("isystem", no_dir, OPT_isystem) \
1248 DEF_OPT("iwithprefix", no_dir, OPT_iwithprefix) \
1249 DEF_OPT("iwithprefixbefore", no_dir, OPT_iwithprefixbefore) \
1250 DEF_OPT("lang-asm", 0, OPT_lang_asm) \
1251 DEF_OPT("lang-c", 0, OPT_lang_c) \
1252 DEF_OPT("lang-c++", 0, OPT_lang_cplusplus) \
1253 DEF_OPT("lang-c89", 0, OPT_lang_c89) \
1254 DEF_OPT("lang-objc", 0, OPT_lang_objc) \
1255 DEF_OPT("lang-objc++", 0, OPT_lang_objcplusplus) \
1256 DEF_OPT("nostdinc", 0, OPT_nostdinc) \
1257 DEF_OPT("nostdinc++", 0, OPT_nostdincplusplus) \
1258 DEF_OPT("o", no_fil, OPT_o) \
1259 DEF_OPT("pedantic", 0, OPT_pedantic) \
1260 DEF_OPT("pedantic-errors", 0, OPT_pedantic_errors) \
1261 DEF_OPT("remap", 0, OPT_remap) \
1262 DEF_OPT("std=c++98", 0, OPT_std_cplusplus98) \
1263 DEF_OPT("std=c89", 0, OPT_std_c89) \
1264 DEF_OPT("std=c99", 0, OPT_std_c99) \
1265 DEF_OPT("std=c9x", 0, OPT_std_c9x) \
1266 DEF_OPT("std=gnu89", 0, OPT_std_gnu89) \
1267 DEF_OPT("std=gnu99", 0, OPT_std_gnu99) \
1268 DEF_OPT("std=gnu9x", 0, OPT_std_gnu9x) \
1269 DEF_OPT("std=iso9899:1990", 0, OPT_std_iso9899_1990) \
1270 DEF_OPT("std=iso9899:199409", 0, OPT_std_iso9899_199409) \
1271 DEF_OPT("std=iso9899:1999", 0, OPT_std_iso9899_1999) \
1272 DEF_OPT("std=iso9899:199x", 0, OPT_std_iso9899_199x) \
1273 DEF_OPT("trigraphs", 0, OPT_trigraphs) \
1274 DEF_OPT("v", 0, OPT_v) \
1275 DEF_OPT("version", 0, OPT_version) \
1276 DEF_OPT("w", 0, OPT_w)
1278 #define DEF_OPT(text, msg, code) code,
1281 COMMAND_LINE_OPTIONS
1288 const char *opt_text;
1291 enum opt_code opt_code;
1294 #define DEF_OPT(text, msg, code) { text, msg, sizeof(text) - 1, code },
1296 static struct cl_option cl_options[] =
1298 static const struct cl_option cl_options[] =
1301 COMMAND_LINE_OPTIONS
1304 #undef COMMAND_LINE_OPTIONS
1306 /* Perform a binary search to find which, if any, option the given
1307 command-line matches. Returns its index in the option array,
1308 negative on failure. Complications arise since some options can be
1309 suffixed with an argument, and multiple complete matches can occur,
1310 e.g. -iwithprefix and -iwithprefixbefore. Moreover, we need to
1311 accept options beginning with -W that we do not recognise, but not
1312 to swallow any subsequent command line argument; this is handled as
1313 special cases in cpp_handle_option. */
1315 parse_option (input)
1318 unsigned int md, mn, mx;
1329 opt_len = cl_options[md].opt_len;
1330 comp = memcmp (input, cl_options[md].opt_text, opt_len);
1338 if (input[opt_len] == '\0')
1340 /* We were passed more text. If the option takes an argument,
1341 we may match a later option or we may have been passed the
1342 argument. The longest possible option match succeeds.
1343 If the option takes no arguments we have not matched and
1344 continue the search (e.g. input="stdc++" match was "stdc"). */
1346 if (cl_options[md].msg)
1348 /* Scan forwards. If we get an exact match, return it.
1349 Otherwise, return the longest option-accepting match.
1350 This loops no more than twice with current options. */
1352 for (; mn < (unsigned int) N_OPTS; mn++)
1354 opt_len = cl_options[mn].opt_len;
1355 if (memcmp (input, cl_options[mn].opt_text, opt_len))
1357 if (input[opt_len] == '\0')
1359 if (cl_options[mn].msg)
1370 /* Handle one command-line option in (argc, argv).
1371 Can be called multiple times, to handle multiple sets of options.
1372 If ignore is non-zero, this will ignore unrecognized -W* options.
1373 Returns number of strings consumed. */
1375 cpp_handle_option (pfile, argc, argv, ignore)
1382 struct cpp_pending *pend = CPP_OPTION (pfile, pending);
1384 /* Interpret "-" or a non-option as a file name. */
1385 if (argv[i][0] != '-' || argv[i][1] == '\0')
1387 if (CPP_OPTION (pfile, in_fname) == NULL)
1388 CPP_OPTION (pfile, in_fname) = argv[i];
1389 else if (CPP_OPTION (pfile, out_fname) == NULL)
1390 CPP_OPTION (pfile, out_fname) = argv[i];
1392 cpp_error (pfile, DL_FATAL,
1393 "too many filenames. Type %s --help for usage info",
1398 enum opt_code opt_code;
1400 const char *arg = 0;
1402 /* Skip over '-'. */
1403 opt_index = parse_option (&argv[i][1]);
1407 opt_code = cl_options[opt_index].opt_code;
1408 if (cl_options[opt_index].msg)
1410 arg = &argv[i][cl_options[opt_index].opt_len + 1];
1412 /* Yuk. Special case for -W as it must not swallow
1413 up any following argument. If this becomes common, add
1414 another field to the cl_options table. */
1415 if (arg[0] == '\0' && opt_code != OPT_W)
1420 cpp_error (pfile, DL_FATAL,
1421 cl_options[opt_index].msg, argv[i - 1]);
1429 case N_OPTS: /* Shut GCC up. */
1431 case OPT_fleading_underscore:
1432 CPP_OPTION (pfile, user_label_prefix) = "_";
1434 case OPT_fno_leading_underscore:
1435 CPP_OPTION (pfile, user_label_prefix) = "";
1437 case OPT_fno_operator_names:
1438 CPP_OPTION (pfile, operator_names) = 0;
1440 case OPT_fpreprocessed:
1441 CPP_OPTION (pfile, preprocessed) = 1;
1443 case OPT_fno_preprocessed:
1444 CPP_OPTION (pfile, preprocessed) = 0;
1446 case OPT_fshow_column:
1447 CPP_OPTION (pfile, show_column) = 1;
1449 case OPT_fno_show_column:
1450 CPP_OPTION (pfile, show_column) = 0;
1452 case OPT_fsigned_char:
1453 CPP_OPTION (pfile, signed_char) = 1;
1455 case OPT_funsigned_char:
1456 CPP_OPTION (pfile, signed_char) = 0;
1459 /* Silently ignore empty string, non-longs and silly values. */
1463 long tabstop = strtol (arg, &endptr, 10);
1464 if (*endptr == '\0' && tabstop >= 1 && tabstop <= 100)
1465 CPP_OPTION (pfile, tabstop) = tabstop;
1469 CPP_OPTION (pfile, inhibit_warnings) = 1;
1474 CPP_OPTION (pfile, help_only) = 1;
1476 case OPT_target__help:
1477 /* Print if any target specific options. cpplib has none, but
1478 make sure help_only gets set. */
1479 CPP_OPTION (pfile, help_only) = 1;
1482 /* --version inhibits compilation, -version doesn't. -v means
1483 verbose and -version. Historical reasons, don't ask. */
1485 CPP_OPTION (pfile, help_only) = 1;
1486 pfile->print_version = 1;
1489 CPP_OPTION (pfile, verbose) = 1;
1490 pfile->print_version = 1;
1493 pfile->print_version = 1;
1497 CPP_OPTION (pfile, discard_comments) = 0;
1500 CPP_OPTION (pfile, discard_comments) = 0;
1501 CPP_OPTION (pfile, discard_comments_in_macro_exp) = 0;
1504 CPP_OPTION (pfile, no_line_commands) = 1;
1506 case OPT_dollar: /* Don't include $ in identifiers. */
1507 CPP_OPTION (pfile, dollars_in_ident) = 0;
1510 CPP_OPTION (pfile, print_include_names) = 1;
1513 new_pending_directive (pend, arg, cpp_define);
1515 case OPT_pedantic_errors:
1516 CPP_OPTION (pfile, pedantic_errors) = 1;
1519 CPP_OPTION (pfile, pedantic) = 1;
1520 CPP_OPTION (pfile, warn_endif_labels) = 1;
1523 CPP_OPTION (pfile, trigraphs) = 1;
1526 CPP_OPTION (pfile, cplusplus) = 1;
1527 CPP_OPTION (pfile, cplusplus_comments) = 1;
1530 CPP_OPTION (pfile, remap) = 1;
1533 CPP_OPTION (pfile, include_prefix) = arg;
1534 CPP_OPTION (pfile, include_prefix_len) = strlen (arg);
1537 set_lang (pfile, CLK_GNUC89);
1539 case OPT_lang_cplusplus:
1540 set_lang (pfile, CLK_GNUCXX);
1543 set_lang (pfile, CLK_OBJC);
1545 case OPT_lang_objcplusplus:
1546 set_lang (pfile, CLK_OBJCXX);
1549 set_lang (pfile, CLK_ASM);
1551 case OPT_std_cplusplus98:
1552 set_lang (pfile, CLK_CXX98);
1555 set_lang (pfile, CLK_GNUC89);
1559 set_lang (pfile, CLK_GNUC99);
1561 case OPT_std_iso9899_199409:
1562 set_lang (pfile, CLK_STDC94);
1564 case OPT_std_iso9899_1990:
1567 set_lang (pfile, CLK_STDC89);
1569 case OPT_std_iso9899_199x:
1570 case OPT_std_iso9899_1999:
1573 set_lang (pfile, CLK_STDC99);
1576 /* -nostdinc causes no default include directories.
1577 You must specify all include-file directories with -I. */
1578 CPP_OPTION (pfile, no_standard_includes) = 1;
1580 case OPT_nostdincplusplus:
1581 /* -nostdinc++ causes no default C++-specific include directories. */
1582 CPP_OPTION (pfile, no_standard_cplusplus_includes) = 1;
1585 if (CPP_OPTION (pfile, out_fname) == NULL)
1586 CPP_OPTION (pfile, out_fname) = arg;
1589 cpp_error (pfile, DL_FATAL, "output filename specified twice");
1594 /* Args to -d specify what parts of macros to dump.
1595 Silently ignore unrecognised options; they may
1596 be aimed at the compiler proper. */
1600 while ((c = *arg++) != '\0')
1604 CPP_OPTION (pfile, dump_macros) = dump_only;
1607 CPP_OPTION (pfile, dump_macros) = dump_names;
1610 CPP_OPTION (pfile, dump_macros) = dump_definitions;
1613 CPP_OPTION (pfile, dump_includes) = 1;
1620 CPP_OPTION (pfile, print_deps_missing_files) = 1;
1623 /* When doing dependencies with -M or -MM, suppress normal
1624 preprocessed output, but still do -dM etc. as software
1625 depends on this. Preprocessed output occurs if -MD, -MMD
1626 or environment var dependency generation is used. */
1627 CPP_OPTION (pfile, print_deps) = 2;
1628 CPP_OPTION (pfile, no_output) = 1;
1631 CPP_OPTION (pfile, print_deps) = 1;
1632 CPP_OPTION (pfile, no_output) = 1;
1635 CPP_OPTION (pfile, deps_file) = arg;
1638 CPP_OPTION (pfile, deps_phony_targets) = 1;
1642 /* Add a target. -MQ quotes for Make. */
1643 deps_add_target (pfile->deps, arg, opt_code == OPT_MQ);
1647 CPP_OPTION (pfile, print_deps) = 2;
1648 CPP_OPTION (pfile, deps_file) = arg;
1651 CPP_OPTION (pfile, print_deps) = 1;
1652 CPP_OPTION (pfile, deps_file) = arg;
1658 /* -A with an argument beginning with '-' acts as
1659 #unassert on whatever immediately follows the '-'.
1660 If "-" is the whole argument, we eliminate all
1661 predefined macros and assertions, including those
1662 that were specified earlier on the command line.
1663 That way we can get rid of any that were passed
1664 automatically in from GCC. */
1668 free_chain (pend->directive_head);
1669 pend->directive_head = NULL;
1670 pend->directive_tail = NULL;
1673 new_pending_directive (pend, arg + 1, cpp_unassert);
1676 new_pending_directive (pend, arg, cpp_assert);
1679 new_pending_directive (pend, arg, cpp_undef);
1681 case OPT_I: /* Add directory to path for includes. */
1682 if (!strcmp (arg, "-"))
1685 Use the preceding -I directories for #include "..."
1686 but not #include <...>.
1687 Don't search the directory of the present file
1688 for #include "...". (Note that -I. -I- is not the same as
1689 the default setup; -I. uses the compiler's working dir.) */
1690 if (! CPP_OPTION (pfile, ignore_srcdir))
1692 pend->quote_head = pend->brack_head;
1693 pend->quote_tail = pend->brack_tail;
1694 pend->brack_head = 0;
1695 pend->brack_tail = 0;
1696 CPP_OPTION (pfile, ignore_srcdir) = 1;
1700 cpp_error (pfile, DL_FATAL, "-I- specified twice");
1705 append_include_chain (pfile, xstrdup (arg), BRACKET, 0);
1708 /* Add directory to beginning of system include path, as a system
1709 include directory. */
1710 append_include_chain (pfile, xstrdup (arg), SYSTEM, 0);
1715 struct pending_option *o = (struct pending_option *)
1716 xmalloc (sizeof (struct pending_option));
1720 if (opt_code == OPT_include)
1721 APPEND (pend, include, o);
1723 APPEND (pend, imacros, o);
1726 case OPT_iwithprefix:
1727 /* Add directory to end of path for includes,
1728 with the default prefix at the front of its name. */
1730 case OPT_iwithprefixbefore:
1731 /* Add directory to main path for includes,
1732 with the default prefix at the front of its name. */
1739 if (CPP_OPTION (pfile, include_prefix) != 0)
1741 size_t ipl = CPP_OPTION (pfile, include_prefix_len);
1742 fname = xmalloc (ipl + len + 1);
1743 memcpy (fname, CPP_OPTION (pfile, include_prefix), ipl);
1744 memcpy (fname + ipl, arg, len + 1);
1746 else if (cpp_GCC_INCLUDE_DIR_len)
1748 fname = xmalloc (cpp_GCC_INCLUDE_DIR_len + len + 1);
1749 memcpy (fname, cpp_GCC_INCLUDE_DIR, cpp_GCC_INCLUDE_DIR_len);
1750 memcpy (fname + cpp_GCC_INCLUDE_DIR_len, arg, len + 1);
1753 fname = xstrdup (arg);
1755 append_include_chain (pfile, fname,
1756 opt_code == OPT_iwithprefix ? SYSTEM: BRACKET, 0);
1760 /* Add directory to end of path for includes. */
1761 append_include_chain (pfile, xstrdup (arg), AFTER, 0);
1764 /* Silently ignore unrecognised options. */
1765 if (!strcmp (argv[i], "-Wall"))
1767 CPP_OPTION (pfile, warn_trigraphs) = 1;
1768 CPP_OPTION (pfile, warn_comments) = 1;
1770 else if (!strcmp (argv[i], "-Wtraditional"))
1771 CPP_OPTION (pfile, warn_traditional) = 1;
1772 else if (!strcmp (argv[i], "-Wtrigraphs"))
1773 CPP_OPTION (pfile, warn_trigraphs) = 1;
1774 else if (!strcmp (argv[i], "-Wcomment"))
1775 CPP_OPTION (pfile, warn_comments) = 1;
1776 else if (!strcmp (argv[i], "-Wcomments"))
1777 CPP_OPTION (pfile, warn_comments) = 1;
1778 else if (!strcmp (argv[i], "-Wundef"))
1779 CPP_OPTION (pfile, warn_undef) = 1;
1780 else if (!strcmp (argv[i], "-Wimport"))
1781 CPP_OPTION (pfile, warn_import) = 1;
1782 else if (!strcmp (argv[i], "-Werror"))
1783 CPP_OPTION (pfile, warnings_are_errors) = 1;
1784 else if (!strcmp (argv[i], "-Wsystem-headers"))
1785 CPP_OPTION (pfile, warn_system_headers) = 1;
1786 else if (!strcmp (argv[i], "-Wendif-labels"))
1787 CPP_OPTION (pfile, warn_endif_labels) = 1;
1788 else if (!strcmp (argv[i], "-Wno-traditional"))
1789 CPP_OPTION (pfile, warn_traditional) = 0;
1790 else if (!strcmp (argv[i], "-Wno-trigraphs"))
1791 CPP_OPTION (pfile, warn_trigraphs) = 0;
1792 else if (!strcmp (argv[i], "-Wno-comment"))
1793 CPP_OPTION (pfile, warn_comments) = 0;
1794 else if (!strcmp (argv[i], "-Wno-comments"))
1795 CPP_OPTION (pfile, warn_comments) = 0;
1796 else if (!strcmp (argv[i], "-Wno-undef"))
1797 CPP_OPTION (pfile, warn_undef) = 0;
1798 else if (!strcmp (argv[i], "-Wno-import"))
1799 CPP_OPTION (pfile, warn_import) = 0;
1800 else if (!strcmp (argv[i], "-Wno-error"))
1801 CPP_OPTION (pfile, warnings_are_errors) = 0;
1802 else if (!strcmp (argv[i], "-Wno-system-headers"))
1803 CPP_OPTION (pfile, warn_system_headers) = 0;
1804 else if (!strcmp (argv[i], "-Wno-endif-labels"))
1805 CPP_OPTION (pfile, warn_endif_labels) = 0;
1814 /* Handle command-line options in (argc, argv).
1815 Can be called multiple times, to handle multiple sets of options.
1816 Returns if an unrecognized option is seen.
1817 Returns number of strings consumed. */
1819 cpp_handle_options (pfile, argc, argv)
1825 int strings_processed;
1827 for (i = 0; i < argc; i += strings_processed)
1829 strings_processed = cpp_handle_option (pfile, argc - i, argv + i, 1);
1830 if (strings_processed == 0)
1837 /* Extra processing when all options are parsed, after all calls to
1838 cpp_handle_option[s]. Consistency checks etc. */
1840 cpp_post_options (pfile)
1843 if (pfile->print_version)
1845 fprintf (stderr, _("GNU CPP version %s (cpplib)"), version_string);
1846 #ifdef TARGET_VERSION
1849 fputc ('\n', stderr);
1852 /* Canonicalize in_fname and out_fname. We guarantee they are not
1853 NULL, and that the empty string represents stdin / stdout. */
1854 if (CPP_OPTION (pfile, in_fname) == NULL
1855 || !strcmp (CPP_OPTION (pfile, in_fname), "-"))
1856 CPP_OPTION (pfile, in_fname) = "";
1858 if (CPP_OPTION (pfile, out_fname) == NULL
1859 || !strcmp (CPP_OPTION (pfile, out_fname), "-"))
1860 CPP_OPTION (pfile, out_fname) = "";
1862 /* -Wtraditional is not useful in C++ mode. */
1863 if (CPP_OPTION (pfile, cplusplus))
1864 CPP_OPTION (pfile, warn_traditional) = 0;
1866 /* Set this if it hasn't been set already. */
1867 if (CPP_OPTION (pfile, user_label_prefix) == NULL)
1868 CPP_OPTION (pfile, user_label_prefix) = USER_LABEL_PREFIX;
1870 /* Permanently disable macro expansion if we are rescanning
1871 preprocessed text. */
1872 if (CPP_OPTION (pfile, preprocessed))
1873 pfile->state.prevent_expansion = 1;
1875 /* -dM makes no normal output. This is set here so that -dM -dD
1876 works as expected. */
1877 if (CPP_OPTION (pfile, dump_macros) == dump_only)
1878 CPP_OPTION (pfile, no_output) = 1;
1880 /* Disable -dD, -dN and -dI if we should make no normal output
1881 (such as with -M). Allow -M -dM since some software relies on
1883 if (CPP_OPTION (pfile, no_output))
1885 if (CPP_OPTION (pfile, dump_macros) != dump_only)
1886 CPP_OPTION (pfile, dump_macros) = dump_none;
1887 CPP_OPTION (pfile, dump_includes) = 0;
1890 /* We need to do this after option processing and before
1891 cpp_start_read, as cppmain.c relies on the options->no_output to
1892 set its callbacks correctly before calling cpp_start_read. */
1893 init_dependency_output (pfile);
1895 /* After checking the environment variables, check if -M or -MM has
1896 not been specified, but other -M options have. */
1897 if (CPP_OPTION (pfile, print_deps) == 0 &&
1898 (CPP_OPTION (pfile, print_deps_missing_files)
1899 || CPP_OPTION (pfile, deps_file)
1900 || CPP_OPTION (pfile, deps_phony_targets)))
1901 cpp_error (pfile, DL_FATAL,
1902 "you must additionally specify either -M or -MM");
1905 /* Set up dependency-file output. On exit, if print_deps is non-zero
1906 then deps_file is not NULL; stdout is the empty string. */
1908 init_dependency_output (pfile)
1911 char *spec, *s, *output_file;
1913 /* Either of two environment variables can specify output of deps.
1914 Its value is either "OUTPUT_FILE" or "OUTPUT_FILE DEPS_TARGET",
1915 where OUTPUT_FILE is the file to write deps info to
1916 and DEPS_TARGET is the target to mention in the deps. */
1918 if (CPP_OPTION (pfile, print_deps) == 0)
1920 spec = getenv ("DEPENDENCIES_OUTPUT");
1922 CPP_OPTION (pfile, print_deps) = 1;
1925 spec = getenv ("SUNPRO_DEPENDENCIES");
1927 CPP_OPTION (pfile, print_deps) = 2;
1932 /* Find the space before the DEPS_TARGET, if there is one. */
1933 s = strchr (spec, ' ');
1936 /* Let the caller perform MAKE quoting. */
1937 deps_add_target (pfile->deps, s + 1, 0);
1938 output_file = (char *) xmalloc (s - spec + 1);
1939 memcpy (output_file, spec, s - spec);
1940 output_file[s - spec] = 0;
1945 /* Command line -MF overrides environment variables and default. */
1946 if (CPP_OPTION (pfile, deps_file) == 0)
1947 CPP_OPTION (pfile, deps_file) = output_file;
1949 CPP_OPTION (pfile, print_deps_append) = 1;
1951 else if (CPP_OPTION (pfile, deps_file) == 0)
1952 /* If -M or -MM was seen without -MF, default output to wherever
1953 was specified with -o. out_fname is non-NULL here. */
1954 CPP_OPTION (pfile, deps_file) = CPP_OPTION (pfile, out_fname);
1957 /* Handle --help output. */
1961 /* To keep the lines from getting too long for some compilers, limit
1962 to about 500 characters (6 lines) per chunk. */
1965 -include <file> Include the contents of <file> before other files\n\
1966 -imacros <file> Accept definition of macros in <file>\n\
1967 -iprefix <path> Specify <path> as a prefix for next two options\n\
1968 -iwithprefix <dir> Add <dir> to the end of the system include path\n\
1969 -iwithprefixbefore <dir> Add <dir> to the end of the main include path\n\
1970 -isystem <dir> Add <dir> to the start of the system include path\n\
1973 -idirafter <dir> Add <dir> to the end of the system include path\n\
1974 -I <dir> Add <dir> to the end of the main include path\n\
1975 -I- Fine-grained include path control; see info docs\n\
1976 -nostdinc Do not search system include directories\n\
1977 (dirs specified with -isystem will still be used)\n\
1978 -nostdinc++ Do not search system include directories for C++\n\
1979 -o <file> Put output into <file>\n\
1982 -pedantic Issue all warnings demanded by strict ISO C\n\
1983 -pedantic-errors Issue -pedantic warnings as errors instead\n\
1984 -trigraphs Support ISO C trigraphs\n\
1985 -lang-c Assume that the input sources are in C\n\
1986 -lang-c89 Assume that the input sources are in C89\n\
1989 -lang-c++ Assume that the input sources are in C++\n\
1990 -lang-objc Assume that the input sources are in ObjectiveC\n\
1991 -lang-objc++ Assume that the input sources are in ObjectiveC++\n\
1992 -lang-asm Assume that the input sources are in assembler\n\
1995 -std=<std name> Specify the conformance standard; one of:\n\
1996 gnu89, gnu99, c89, c99, iso9899:1990,\n\
1997 iso9899:199409, iso9899:1999\n\
1998 -+ Allow parsing of C++ style features\n\
1999 -w Inhibit warning messages\n\
2000 -Wtrigraphs Warn if trigraphs are encountered\n\
2001 -Wno-trigraphs Do not warn about trigraphs\n\
2002 -Wcomment{s} Warn if one comment starts inside another\n\
2005 -Wno-comment{s} Do not warn about comments\n\
2006 -Wtraditional Warn about features not present in traditional C\n\
2007 -Wno-traditional Do not warn about traditional C\n\
2008 -Wundef Warn if an undefined macro is used by #if\n\
2009 -Wno-undef Do not warn about testing undefined macros\n\
2010 -Wimport Warn about the use of the #import directive\n\
2013 -Wno-import Do not warn about the use of #import\n\
2014 -Werror Treat all warnings as errors\n\
2015 -Wno-error Do not treat warnings as errors\n\
2016 -Wsystem-headers Do not suppress warnings from system headers\n\
2017 -Wno-system-headers Suppress warnings from system headers\n\
2018 -Wall Enable all preprocessor warnings\n\
2021 -M Generate make dependencies\n\
2022 -MM As -M, but ignore system header files\n\
2023 -MD Generate make dependencies and compile\n\
2024 -MMD As -MD, but ignore system header files\n\
2025 -MF <file> Write dependency output to the given file\n\
2026 -MG Treat missing header file as generated files\n\
2029 -MP Generate phony targets for all headers\n\
2030 -MQ <target> Add a MAKE-quoted target\n\
2031 -MT <target> Add an unquoted target\n\
2034 -D<macro> Define a <macro> with string '1' as its value\n\
2035 -D<macro>=<val> Define a <macro> with <val> as its value\n\
2036 -A<question>=<answer> Assert the <answer> to <question>\n\
2037 -A-<question>=<answer> Disable the <answer> to <question>\n\
2038 -U<macro> Undefine <macro> \n\
2039 -v Display the version number\n\
2042 -H Print the name of header files as they are used\n\
2043 -C Do not discard comments\n\
2044 -dM Display a list of macro definitions active at end\n\
2045 -dD Preserve macro definitions in output\n\
2046 -dN As -dD except that only the names are preserved\n\
2047 -dI Include #include directives in the output\n\
2050 -fpreprocessed Treat the input file as already preprocessed\n\
2051 -ftabstop=<number> Distance between tab stops for column reporting\n\
2052 -P Do not generate #line directives\n\
2053 -$ Do not allow '$' in identifiers\n\
2054 -remap Remap file names when including files\n\
2055 --version Display version information\n\
2056 -h or --help Display this information\n\