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, discard_comments) = 1;
491 CPP_OPTION (pfile, discard_comments_in_macro_exp) = 1;
492 CPP_OPTION (pfile, show_column) = 1;
493 CPP_OPTION (pfile, tabstop) = 8;
494 CPP_OPTION (pfile, operator_names) = 1;
495 CPP_OPTION (pfile, warn_endif_labels) = 1;
496 #if DEFAULT_SIGNED_CHAR
497 CPP_OPTION (pfile, signed_char) = 1;
499 CPP_OPTION (pfile, signed_char) = 0;
502 CPP_OPTION (pfile, pending) =
503 (struct cpp_pending *) xcalloc (1, sizeof (struct cpp_pending));
505 /* Default CPP arithmetic to something sensible for the host for the
506 benefit of dumb users like fix-header. */
507 #define BITS_PER_HOST_WIDEST_INT (CHAR_BIT * sizeof (HOST_WIDEST_INT))
508 CPP_OPTION (pfile, precision) = BITS_PER_HOST_WIDEST_INT;
509 CPP_OPTION (pfile, char_precision) = CHAR_BIT;
510 CPP_OPTION (pfile, wchar_precision) = CHAR_BIT * sizeof (int);
511 CPP_OPTION (pfile, int_precision) = CHAR_BIT * sizeof (int);
513 /* It's simplest to just create this struct whether or not it will
515 pfile->deps = deps_init ();
517 /* Initialise the line map. Start at logical line 1, so we can use
518 a line number of zero for special states. */
519 init_line_maps (&pfile->line_maps);
522 /* Initialize lexer state. */
523 pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments);
525 /* Set up static tokens. */
526 pfile->date.type = CPP_EOF;
527 pfile->avoid_paste.type = CPP_PADDING;
528 pfile->avoid_paste.val.source = NULL;
529 pfile->eof.type = CPP_EOF;
530 pfile->eof.flags = 0;
532 /* Create a token buffer for the lexer. */
533 _cpp_init_tokenrun (&pfile->base_run, 250);
534 pfile->cur_run = &pfile->base_run;
535 pfile->cur_token = pfile->base_run.base;
537 /* Initialise the base context. */
538 pfile->context = &pfile->base_context;
539 pfile->base_context.macro = 0;
540 pfile->base_context.prev = pfile->base_context.next = 0;
542 /* Aligned and unaligned storage. */
543 pfile->a_buff = _cpp_get_buff (pfile, 0);
544 pfile->u_buff = _cpp_get_buff (pfile, 0);
546 /* The expression parser stack. */
547 _cpp_expand_op_stack (pfile);
549 /* Initialise the buffer obstack. */
550 gcc_obstack_init (&pfile->buffer_ob);
552 _cpp_init_includes (pfile);
557 /* Free resources used by PFILE. Accessing PFILE after this function
558 returns leads to undefined behaviour. Returns the error count. */
564 struct search_path *dir, *dirn;
565 cpp_context *context, *contextn;
566 tokenrun *run, *runn;
568 free_chain (CPP_OPTION (pfile, pending)->include_head);
569 free (CPP_OPTION (pfile, pending));
570 free (pfile->op_stack);
572 while (CPP_BUFFER (pfile) != NULL)
573 _cpp_pop_buffer (pfile);
575 if (pfile->macro_buffer)
577 free ((PTR) pfile->macro_buffer);
578 pfile->macro_buffer = NULL;
579 pfile->macro_buffer_len = 0;
582 deps_free (pfile->deps);
583 obstack_free (&pfile->buffer_ob, 0);
585 _cpp_destroy_hashtable (pfile);
586 _cpp_cleanup_includes (pfile);
588 _cpp_free_buff (pfile->a_buff);
589 _cpp_free_buff (pfile->u_buff);
590 _cpp_free_buff (pfile->free_buffs);
592 for (run = &pfile->base_run; run; run = runn)
596 if (run != &pfile->base_run)
600 for (dir = CPP_OPTION (pfile, quote_include); dir; dir = dirn)
603 free ((PTR) dir->name);
607 for (context = pfile->base_context.next; context; context = contextn)
609 contextn = context->next;
613 free_line_maps (&pfile->line_maps);
615 result = pfile->errors;
622 /* This structure defines one built-in identifier. A node will be
623 entered in the hash table under the name NAME, with value VALUE (if
624 any). If flags has OPERATOR, the node's operator field is used; if
625 flags has BUILTIN the node's builtin field is used. Macros that are
626 known at build time should not be flagged BUILTIN, as then they do
627 not appear in macro dumps with e.g. -dM or -dD.
629 Two values are not compile time constants, so we tag
630 them in the FLAGS field instead:
631 VERS value is the global version_string, quoted
632 ULP value is the global user_label_prefix
634 Also, macros with CPLUS set in the flags field are entered only for C++. */
639 unsigned char builtin;
640 unsigned char operator;
641 unsigned short flags;
648 #define OPERATOR 0x10
650 #define B(n, t) { U n, 0, t, 0, BUILTIN, sizeof n - 1 }
651 #define C(n, v) { U n, v, 0, 0, 0, sizeof n - 1 }
652 #define X(n, f) { U n, 0, 0, 0, f, sizeof n - 1 }
653 #define O(n, c, f) { U n, 0, 0, c, OPERATOR | f, sizeof n - 1 }
654 static const struct builtin builtin_array[] =
656 B("__TIME__", BT_TIME),
657 B("__DATE__", BT_DATE),
658 B("__FILE__", BT_FILE),
659 B("__BASE_FILE__", BT_BASE_FILE),
660 B("__LINE__", BT_SPECLINE),
661 B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL),
662 B("_Pragma", BT_PRAGMA),
664 X("__VERSION__", VERS),
665 X("__USER_LABEL_PREFIX__", ULP),
666 C("__REGISTER_PREFIX__", REGISTER_PREFIX),
667 C("__HAVE_BUILTIN_SETJMP__", "1"),
668 #if USING_SJLJ_EXCEPTIONS
669 /* libgcc needs to know this. */
670 C("__USING_SJLJ_EXCEPTIONS__","1"),
672 #ifndef NO_BUILTIN_SIZE_TYPE
673 C("__SIZE_TYPE__", SIZE_TYPE),
675 #ifndef NO_BUILTIN_PTRDIFF_TYPE
676 C("__PTRDIFF_TYPE__", PTRDIFF_TYPE),
678 #ifndef NO_BUILTIN_WCHAR_TYPE
679 C("__WCHAR_TYPE__", WCHAR_TYPE),
681 #ifndef NO_BUILTIN_WINT_TYPE
682 C("__WINT_TYPE__", WINT_TYPE),
684 #ifdef STDC_0_IN_SYSTEM_HEADERS
685 B("__STDC__", BT_STDC),
690 /* Named operators known to the preprocessor. These cannot be #defined
691 and always have their stated meaning. They are treated like normal
692 identifiers except for the type code and the meaning. Most of them
693 are only for C++ (but see iso646.h). */
694 O("and", CPP_AND_AND, CPLUS),
695 O("and_eq", CPP_AND_EQ, CPLUS),
696 O("bitand", CPP_AND, CPLUS),
697 O("bitor", CPP_OR, CPLUS),
698 O("compl", CPP_COMPL, CPLUS),
699 O("not", CPP_NOT, CPLUS),
700 O("not_eq", CPP_NOT_EQ, CPLUS),
701 O("or", CPP_OR_OR, CPLUS),
702 O("or_eq", CPP_OR_EQ, CPLUS),
703 O("xor", CPP_XOR, CPLUS),
704 O("xor_eq", CPP_XOR_EQ, CPLUS)
710 #define builtin_array_end (builtin_array + ARRAY_SIZE (builtin_array))
712 /* Subroutine of cpp_read_main_file; reads the builtins table above and
713 enters them, and language-specific macros, into the hash table. */
715 init_builtins (pfile)
718 const struct builtin *b;
720 for(b = builtin_array; b < builtin_array_end; b++)
722 if ((b->flags & CPLUS) && ! CPP_OPTION (pfile, cplusplus))
725 if ((b->flags & OPERATOR) && ! CPP_OPTION (pfile, operator_names))
728 if (b->flags & (OPERATOR | BUILTIN))
730 cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len);
731 if (b->flags & OPERATOR)
733 hp->flags |= NODE_OPERATOR;
734 hp->value.operator = b->operator;
739 hp->flags |= NODE_BUILTIN | NODE_WARN;
740 hp->value.builtin = b->builtin;
743 else /* A standard macro of some kind. */
750 /* Allocate enough space for 'name "value"\n\0'. */
751 str = alloca (b->len + strlen (version_string) + 5);
752 sprintf (str, "%s \"%s\"\n", b->name, version_string);
757 val = CPP_OPTION (pfile, user_label_prefix);
761 /* Allocate enough space for "name value\n\0". */
762 str = alloca (b->len + strlen (val) + 3);
763 sprintf(str, "%s %s\n", b->name, val);
766 _cpp_define_builtin (pfile, str);
770 if (CPP_OPTION (pfile, cplusplus))
771 _cpp_define_builtin (pfile, "__cplusplus 1");
773 if (CPP_OPTION (pfile, objc))
774 _cpp_define_builtin (pfile, "__OBJC__ 1");
776 if (CPP_OPTION (pfile, lang) == CLK_STDC94)
777 _cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L");
778 else if (CPP_OPTION (pfile, c99))
779 _cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L");
781 if (CPP_OPTION (pfile, signed_char) == 0)
782 _cpp_define_builtin (pfile, "__CHAR_UNSIGNED__ 1");
784 if (CPP_OPTION (pfile, lang) == CLK_STDC89
785 || CPP_OPTION (pfile, lang) == CLK_STDC94
786 || CPP_OPTION (pfile, lang) == CLK_STDC99)
787 _cpp_define_builtin (pfile, "__STRICT_ANSI__ 1");
788 else if (CPP_OPTION (pfile, lang) == CLK_ASM)
789 _cpp_define_builtin (pfile, "__ASSEMBLER__ 1");
791 if (pfile->cb.register_builtins)
792 (*pfile->cb.register_builtins) (pfile);
799 #undef builtin_array_end
801 /* And another subroutine. This one sets up the standard include path. */
803 init_standard_includes (pfile)
807 const struct default_include *p;
808 const char *specd_prefix = CPP_OPTION (pfile, include_prefix);
810 /* Several environment variables may add to the include search path.
811 CPATH specifies an additional list of directories to be searched
812 as if specified with -I, while C_INCLUDE_PATH, CPLUS_INCLUDE_PATH,
813 etc. specify an additional list of directories to be searched as
814 if specified with -isystem, for the language indicated. */
816 GET_ENV_PATH_LIST (path, "CPATH");
817 if (path != 0 && *path != 0)
818 path_include (pfile, path, BRACKET);
820 switch ((CPP_OPTION (pfile, objc) << 1) + CPP_OPTION (pfile, cplusplus))
823 GET_ENV_PATH_LIST (path, "C_INCLUDE_PATH");
826 GET_ENV_PATH_LIST (path, "CPLUS_INCLUDE_PATH");
829 GET_ENV_PATH_LIST (path, "OBJC_INCLUDE_PATH");
832 GET_ENV_PATH_LIST (path, "OBJCPLUS_INCLUDE_PATH");
835 if (path != 0 && *path != 0)
836 path_include (pfile, path, SYSTEM);
838 /* Search "translated" versions of GNU directories.
839 These have /usr/local/lib/gcc... replaced by specd_prefix. */
840 if (specd_prefix != 0 && cpp_GCC_INCLUDE_DIR_len)
842 /* Remove the `include' from /usr/local/lib/gcc.../include.
843 GCC_INCLUDE_DIR will always end in /include. */
844 int default_len = cpp_GCC_INCLUDE_DIR_len;
845 char *default_prefix = (char *) alloca (default_len + 1);
846 int specd_len = strlen (specd_prefix);
848 memcpy (default_prefix, cpp_GCC_INCLUDE_DIR, default_len);
849 default_prefix[default_len] = '\0';
851 for (p = cpp_include_defaults; p->fname; p++)
853 /* Some standard dirs are only for C++. */
855 || (CPP_OPTION (pfile, cplusplus)
856 && !CPP_OPTION (pfile, no_standard_cplusplus_includes)))
858 /* Does this dir start with the prefix? */
859 if (!memcmp (p->fname, default_prefix, default_len))
861 /* Yes; change prefix and add to search list. */
862 int flen = strlen (p->fname);
863 int this_len = specd_len + flen - default_len;
864 char *str = (char *) xmalloc (this_len + 1);
865 memcpy (str, specd_prefix, specd_len);
866 memcpy (str + specd_len,
867 p->fname + default_len,
868 flen - default_len + 1);
870 append_include_chain (pfile, str, SYSTEM, p->cxx_aware);
876 /* Search ordinary names for GNU include directories. */
877 for (p = cpp_include_defaults; p->fname; p++)
879 /* Some standard dirs are only for C++. */
881 || (CPP_OPTION (pfile, cplusplus)
882 && !CPP_OPTION (pfile, no_standard_cplusplus_includes)))
884 char *str = update_path (p->fname, p->component);
885 append_include_chain (pfile, str, SYSTEM, p->cxx_aware);
890 /* Pushes a command line -imacro and -include file indicated by P onto
891 the buffer stack. Returns non-zero if successful. */
893 push_include (pfile, p)
895 struct pending_option *p;
899 /* Later: maybe update this to use the #include "" search path
900 if cpp_read_file fails. */
901 header.type = CPP_STRING;
902 header.val.str.text = (const unsigned char *) p->arg;
903 header.val.str.len = strlen (p->arg);
904 /* Make the command line directive take up a line. */
907 return _cpp_execute_include (pfile, &header, IT_CMDLINE);
910 /* Frees a pending_option chain. */
913 struct pending_option *head;
915 struct pending_option *next;
925 /* Sanity-checks are dependent on command-line options, so it is
926 called as a subroutine of cpp_read_main_file (). */
928 static void sanity_checks PARAMS ((cpp_reader *));
929 static void sanity_checks (pfile)
934 /* Sanity checks for assumptions about CPP arithmetic and target
935 type precisions made by cpplib. */
938 cpp_error (pfile, DL_FATAL, "cppchar_t must be an unsigned type");
940 if (CPP_OPTION (pfile, precision) > BITS_PER_HOST_WIDEST_INT)
941 cpp_error (pfile, DL_FATAL,
942 "preprocessor arithmetic has maximum precision of %u bits; target requires %u bits",
943 BITS_PER_HOST_WIDEST_INT, CPP_OPTION (pfile, precision));
945 if (CPP_OPTION (pfile, precision) < CPP_OPTION (pfile, int_precision))
946 cpp_error (pfile, DL_FATAL,
947 "CPP arithmetic must be at least as precise as a target int");
949 if (CPP_OPTION (pfile, char_precision) < 8)
950 cpp_error (pfile, DL_FATAL, "target char is less than 8 bits wide");
952 if (CPP_OPTION (pfile, wchar_precision) < CPP_OPTION (pfile, char_precision))
953 cpp_error (pfile, DL_FATAL,
954 "target wchar_t is narrower than target char");
956 if (CPP_OPTION (pfile, int_precision) < CPP_OPTION (pfile, char_precision))
957 cpp_error (pfile, DL_FATAL,
958 "target int is narrower than target char");
960 if (CPP_OPTION (pfile, wchar_precision) > BITS_PER_CPPCHAR_T)
961 cpp_error (pfile, DL_FATAL,
962 "CPP on this host cannot handle wide character constants over %u bits, but the target requires %u bits",
963 BITS_PER_CPPCHAR_T, CPP_OPTION (pfile, wchar_precision));
966 # define sanity_checks(PFILE)
969 /* This is called after options have been parsed, and partially
970 processed. Setup for processing input from the file named FNAME,
971 or stdin if it is the empty string. Return the original filename
972 on success (e.g. foo.i->foo.c), or NULL on failure. */
974 cpp_read_main_file (pfile, fname, table)
979 sanity_checks (pfile);
981 /* The front ends don't set up the hash table until they have
982 finished processing the command line options, so initializing the
983 hashtable is deferred until now. */
984 _cpp_init_hashtable (pfile, table);
986 /* Set up the include search path now. */
987 if (! CPP_OPTION (pfile, no_standard_includes))
988 init_standard_includes (pfile);
990 merge_include_chains (pfile);
992 /* With -v, print the list of dirs to search. */
993 if (CPP_OPTION (pfile, verbose))
995 struct search_path *l;
996 fprintf (stderr, _("#include \"...\" search starts here:\n"));
997 for (l = CPP_OPTION (pfile, quote_include); l; l = l->next)
999 if (l == CPP_OPTION (pfile, bracket_include))
1000 fprintf (stderr, _("#include <...> search starts here:\n"));
1001 fprintf (stderr, " %s\n", l->name);
1003 fprintf (stderr, _("End of search list.\n"));
1006 if (CPP_OPTION (pfile, print_deps))
1007 /* Set the default target (if there is none already). */
1008 deps_add_default_target (pfile->deps, fname);
1010 /* Open the main input file. */
1011 if (!_cpp_read_file (pfile, fname))
1014 /* Set this after cpp_post_options so the client can change the
1015 option if it wishes, and after stacking the main file so we don't
1016 trace the main file. */
1017 pfile->line_maps.trace_includes = CPP_OPTION (pfile, print_include_names);
1019 /* For foo.i, read the original filename foo.c now, for the benefit
1020 of the front ends. */
1021 if (CPP_OPTION (pfile, preprocessed))
1022 read_original_filename (pfile);
1024 return pfile->map->to_file;
1027 /* For preprocessed files, if the first tokens are of the form # NUM.
1028 handle the directive so we know the original file name. This will
1029 generate file_change callbacks, which the front ends must handle
1030 appropriately given their state of initialization. */
1032 read_original_filename (pfile)
1035 const cpp_token *token, *token1;
1037 /* Lex ahead; if the first tokens are of the form # NUM, then
1038 process the directive, otherwise back up. */
1039 token = _cpp_lex_direct (pfile);
1040 if (token->type == CPP_HASH)
1042 token1 = _cpp_lex_direct (pfile);
1043 _cpp_backup_tokens (pfile, 1);
1045 /* If it's a #line directive, handle it. */
1046 if (token1->type == CPP_NUMBER)
1048 _cpp_handle_directive (pfile, token->flags & PREV_WHITE);
1053 /* Backup as if nothing happened. */
1054 _cpp_backup_tokens (pfile, 1);
1057 /* Handle pending command line options: -D, -U, -A, -imacros and
1058 -include. This should be called after debugging has been properly
1059 set up in the front ends. */
1061 cpp_finish_options (pfile)
1064 /* Install builtins and process command line macros etc. in the order
1065 they appeared, but only if not already preprocessed. */
1066 if (! CPP_OPTION (pfile, preprocessed))
1068 struct pending_option *p;
1070 _cpp_do_file_change (pfile, LC_RENAME, _("<built-in>"), 1, 0);
1071 init_builtins (pfile);
1072 _cpp_do_file_change (pfile, LC_RENAME, _("<command line>"), 1, 0);
1073 for (p = CPP_OPTION (pfile, pending)->directive_head; p; p = p->next)
1074 (*p->handler) (pfile, p->arg);
1076 /* Scan -imacros files after -D, -U, but before -include.
1077 pfile->next_include_file is NULL, so _cpp_pop_buffer does not
1078 push -include files. */
1079 for (p = CPP_OPTION (pfile, pending)->imacros_head; p; p = p->next)
1080 if (push_include (pfile, p))
1081 cpp_scan_nooutput (pfile);
1083 pfile->next_include_file = &CPP_OPTION (pfile, pending)->include_head;
1084 _cpp_maybe_push_include_file (pfile);
1087 free_chain (CPP_OPTION (pfile, pending)->imacros_head);
1088 free_chain (CPP_OPTION (pfile, pending)->directive_head);
1091 /* Push the next buffer on the stack given by -include, if any. */
1093 _cpp_maybe_push_include_file (pfile)
1096 if (pfile->next_include_file)
1098 struct pending_option *head = *pfile->next_include_file;
1100 while (head && !push_include (pfile, head))
1104 pfile->next_include_file = &head->next;
1107 /* All done; restore the line map from <command line>. */
1108 _cpp_do_file_change (pfile, LC_RENAME,
1109 pfile->line_maps.maps[0].to_file, 1, 0);
1110 /* Don't come back here again. */
1111 pfile->next_include_file = NULL;
1116 /* Use mkdeps.c to output dependency information. */
1121 /* Stream on which to print the dependency information. */
1122 FILE *deps_stream = 0;
1123 const char *const deps_mode =
1124 CPP_OPTION (pfile, print_deps_append) ? "a" : "w";
1126 if (CPP_OPTION (pfile, deps_file)[0] == '\0')
1127 deps_stream = stdout;
1130 deps_stream = fopen (CPP_OPTION (pfile, deps_file), deps_mode);
1131 if (deps_stream == 0)
1133 cpp_errno (pfile, DL_ERROR, CPP_OPTION (pfile, deps_file));
1138 deps_write (pfile->deps, deps_stream, 72);
1140 if (CPP_OPTION (pfile, deps_phony_targets))
1141 deps_phony_targets (pfile->deps, deps_stream);
1143 /* Don't close stdout. */
1144 if (deps_stream != stdout)
1146 if (ferror (deps_stream) || fclose (deps_stream) != 0)
1147 cpp_error (pfile, DL_FATAL, "I/O error on output");
1151 /* This is called at the end of preprocessing. It pops the
1152 last buffer and writes dependency output. It should also
1153 clear macro definitions, such that you could call cpp_start_read
1154 with a new filename to restart processing. */
1159 /* cpplex.c leaves the final buffer on the stack. This it so that
1160 it returns an unending stream of CPP_EOFs to the client. If we
1161 popped the buffer, we'd dereference a NULL buffer pointer and
1162 segfault. It's nice to allow the client to do worry-free excess
1163 cpp_get_token calls. */
1164 while (pfile->buffer)
1165 _cpp_pop_buffer (pfile);
1167 /* Don't write the deps file if preprocessing has failed. */
1168 if (CPP_OPTION (pfile, print_deps) && pfile->errors == 0)
1169 output_deps (pfile);
1171 /* Report on headers that could use multiple include guards. */
1172 if (CPP_OPTION (pfile, print_include_names))
1173 _cpp_report_missing_guards (pfile);
1176 /* Add a directive to be handled later in the initialization phase. */
1178 new_pending_directive (pend, text, handler)
1179 struct cpp_pending *pend;
1181 cl_directive_handler handler;
1183 struct pending_option *o = (struct pending_option *)
1184 xmalloc (sizeof (struct pending_option));
1188 o->handler = handler;
1189 APPEND (pend, directive, o);
1192 /* Irix6 "cc -n32" and OSF4 cc have problems with char foo[] = ("string");
1193 I.e. a const string initializer with parens around it. That is
1194 what N_("string") resolves to, so we make no_* be macros instead. */
1195 #define no_arg N_("argument missing after %s")
1196 #define no_ass N_("assertion missing after %s")
1197 #define no_dir N_("directory name missing after %s")
1198 #define no_fil N_("file name missing after %s")
1199 #define no_mac N_("macro name missing after %s")
1200 #define no_pth N_("path name missing after %s")
1201 #define no_num N_("number missing after %s")
1202 #define no_tgt N_("target missing after %s")
1204 /* This is the list of all command line options, with the leading
1205 "-" removed. It must be sorted in ASCII collating order. */
1206 #define COMMAND_LINE_OPTIONS \
1207 DEF_OPT("$", 0, OPT_dollar) \
1208 DEF_OPT("+", 0, OPT_plus) \
1209 DEF_OPT("-help", 0, OPT__help) \
1210 DEF_OPT("-target-help", 0, OPT_target__help) \
1211 DEF_OPT("-version", 0, OPT__version) \
1212 DEF_OPT("A", no_ass, OPT_A) \
1213 DEF_OPT("C", 0, OPT_C) \
1214 DEF_OPT("CC", 0, OPT_CC) \
1215 DEF_OPT("D", no_mac, OPT_D) \
1216 DEF_OPT("H", 0, OPT_H) \
1217 DEF_OPT("I", no_dir, OPT_I) \
1218 DEF_OPT("M", 0, OPT_M) \
1219 DEF_OPT("MD", no_fil, OPT_MD) \
1220 DEF_OPT("MF", no_fil, OPT_MF) \
1221 DEF_OPT("MG", 0, OPT_MG) \
1222 DEF_OPT("MM", 0, OPT_MM) \
1223 DEF_OPT("MMD", no_fil, OPT_MMD) \
1224 DEF_OPT("MP", 0, OPT_MP) \
1225 DEF_OPT("MQ", no_tgt, OPT_MQ) \
1226 DEF_OPT("MT", no_tgt, OPT_MT) \
1227 DEF_OPT("P", 0, OPT_P) \
1228 DEF_OPT("U", no_mac, OPT_U) \
1229 DEF_OPT("W", no_arg, OPT_W) /* arg optional */ \
1230 DEF_OPT("d", no_arg, OPT_d) \
1231 DEF_OPT("fleading-underscore", 0, OPT_fleading_underscore) \
1232 DEF_OPT("fno-leading-underscore", 0, OPT_fno_leading_underscore) \
1233 DEF_OPT("fno-operator-names", 0, OPT_fno_operator_names) \
1234 DEF_OPT("fno-preprocessed", 0, OPT_fno_preprocessed) \
1235 DEF_OPT("fno-show-column", 0, OPT_fno_show_column) \
1236 DEF_OPT("fpreprocessed", 0, OPT_fpreprocessed) \
1237 DEF_OPT("fshow-column", 0, OPT_fshow_column) \
1238 DEF_OPT("fsigned-char", 0, OPT_fsigned_char) \
1239 DEF_OPT("ftabstop=", no_num, OPT_ftabstop) \
1240 DEF_OPT("funsigned-char", 0, OPT_funsigned_char) \
1241 DEF_OPT("h", 0, OPT_h) \
1242 DEF_OPT("idirafter", no_dir, OPT_idirafter) \
1243 DEF_OPT("imacros", no_fil, OPT_imacros) \
1244 DEF_OPT("include", no_fil, OPT_include) \
1245 DEF_OPT("iprefix", no_pth, OPT_iprefix) \
1246 DEF_OPT("isystem", no_dir, OPT_isystem) \
1247 DEF_OPT("iwithprefix", no_dir, OPT_iwithprefix) \
1248 DEF_OPT("iwithprefixbefore", no_dir, OPT_iwithprefixbefore) \
1249 DEF_OPT("lang-asm", 0, OPT_lang_asm) \
1250 DEF_OPT("lang-c", 0, OPT_lang_c) \
1251 DEF_OPT("lang-c++", 0, OPT_lang_cplusplus) \
1252 DEF_OPT("lang-c89", 0, OPT_lang_c89) \
1253 DEF_OPT("lang-objc", 0, OPT_lang_objc) \
1254 DEF_OPT("lang-objc++", 0, OPT_lang_objcplusplus) \
1255 DEF_OPT("nostdinc", 0, OPT_nostdinc) \
1256 DEF_OPT("nostdinc++", 0, OPT_nostdincplusplus) \
1257 DEF_OPT("o", no_fil, OPT_o) \
1258 DEF_OPT("pedantic", 0, OPT_pedantic) \
1259 DEF_OPT("pedantic-errors", 0, OPT_pedantic_errors) \
1260 DEF_OPT("remap", 0, OPT_remap) \
1261 DEF_OPT("std=c++98", 0, OPT_std_cplusplus98) \
1262 DEF_OPT("std=c89", 0, OPT_std_c89) \
1263 DEF_OPT("std=c99", 0, OPT_std_c99) \
1264 DEF_OPT("std=c9x", 0, OPT_std_c9x) \
1265 DEF_OPT("std=gnu89", 0, OPT_std_gnu89) \
1266 DEF_OPT("std=gnu99", 0, OPT_std_gnu99) \
1267 DEF_OPT("std=gnu9x", 0, OPT_std_gnu9x) \
1268 DEF_OPT("std=iso9899:1990", 0, OPT_std_iso9899_1990) \
1269 DEF_OPT("std=iso9899:199409", 0, OPT_std_iso9899_199409) \
1270 DEF_OPT("std=iso9899:1999", 0, OPT_std_iso9899_1999) \
1271 DEF_OPT("std=iso9899:199x", 0, OPT_std_iso9899_199x) \
1272 DEF_OPT("trigraphs", 0, OPT_trigraphs) \
1273 DEF_OPT("v", 0, OPT_v) \
1274 DEF_OPT("version", 0, OPT_version) \
1275 DEF_OPT("w", 0, OPT_w)
1277 #define DEF_OPT(text, msg, code) code,
1280 COMMAND_LINE_OPTIONS
1287 const char *opt_text;
1290 enum opt_code opt_code;
1293 #define DEF_OPT(text, msg, code) { text, msg, sizeof(text) - 1, code },
1295 static struct cl_option cl_options[] =
1297 static const struct cl_option cl_options[] =
1300 COMMAND_LINE_OPTIONS
1303 #undef COMMAND_LINE_OPTIONS
1305 /* Perform a binary search to find which, if any, option the given
1306 command-line matches. Returns its index in the option array,
1307 negative on failure. Complications arise since some options can be
1308 suffixed with an argument, and multiple complete matches can occur,
1309 e.g. -iwithprefix and -iwithprefixbefore. Moreover, we need to
1310 accept options beginning with -W that we do not recognise, but not
1311 to swallow any subsequent command line argument; this is handled as
1312 special cases in cpp_handle_option. */
1314 parse_option (input)
1317 unsigned int md, mn, mx;
1328 opt_len = cl_options[md].opt_len;
1329 comp = memcmp (input, cl_options[md].opt_text, opt_len);
1337 if (input[opt_len] == '\0')
1339 /* We were passed more text. If the option takes an argument,
1340 we may match a later option or we may have been passed the
1341 argument. The longest possible option match succeeds.
1342 If the option takes no arguments we have not matched and
1343 continue the search (e.g. input="stdc++" match was "stdc"). */
1345 if (cl_options[md].msg)
1347 /* Scan forwards. If we get an exact match, return it.
1348 Otherwise, return the longest option-accepting match.
1349 This loops no more than twice with current options. */
1351 for (; mn < (unsigned int) N_OPTS; mn++)
1353 opt_len = cl_options[mn].opt_len;
1354 if (memcmp (input, cl_options[mn].opt_text, opt_len))
1356 if (input[opt_len] == '\0')
1358 if (cl_options[mn].msg)
1369 /* Handle one command-line option in (argc, argv).
1370 Can be called multiple times, to handle multiple sets of options.
1371 If ignore is non-zero, this will ignore unrecognized -W* options.
1372 Returns number of strings consumed. */
1374 cpp_handle_option (pfile, argc, argv, ignore)
1381 struct cpp_pending *pend = CPP_OPTION (pfile, pending);
1383 /* Interpret "-" or a non-option as a file name. */
1384 if (argv[i][0] != '-' || argv[i][1] == '\0')
1386 if (CPP_OPTION (pfile, in_fname) == NULL)
1387 CPP_OPTION (pfile, in_fname) = argv[i];
1388 else if (CPP_OPTION (pfile, out_fname) == NULL)
1389 CPP_OPTION (pfile, out_fname) = argv[i];
1391 cpp_error (pfile, DL_FATAL,
1392 "too many filenames. Type %s --help for usage info",
1397 enum opt_code opt_code;
1399 const char *arg = 0;
1401 /* Skip over '-'. */
1402 opt_index = parse_option (&argv[i][1]);
1406 opt_code = cl_options[opt_index].opt_code;
1407 if (cl_options[opt_index].msg)
1409 arg = &argv[i][cl_options[opt_index].opt_len + 1];
1411 /* Yuk. Special case for -W as it must not swallow
1412 up any following argument. If this becomes common, add
1413 another field to the cl_options table. */
1414 if (arg[0] == '\0' && opt_code != OPT_W)
1419 cpp_error (pfile, DL_FATAL,
1420 cl_options[opt_index].msg, argv[i - 1]);
1428 case N_OPTS: /* Shut GCC up. */
1430 case OPT_fleading_underscore:
1431 CPP_OPTION (pfile, user_label_prefix) = "_";
1433 case OPT_fno_leading_underscore:
1434 CPP_OPTION (pfile, user_label_prefix) = "";
1436 case OPT_fno_operator_names:
1437 CPP_OPTION (pfile, operator_names) = 0;
1439 case OPT_fpreprocessed:
1440 CPP_OPTION (pfile, preprocessed) = 1;
1442 case OPT_fno_preprocessed:
1443 CPP_OPTION (pfile, preprocessed) = 0;
1445 case OPT_fshow_column:
1446 CPP_OPTION (pfile, show_column) = 1;
1448 case OPT_fno_show_column:
1449 CPP_OPTION (pfile, show_column) = 0;
1451 case OPT_fsigned_char:
1452 CPP_OPTION (pfile, signed_char) = 1;
1454 case OPT_funsigned_char:
1455 CPP_OPTION (pfile, signed_char) = 0;
1458 /* Silently ignore empty string, non-longs and silly values. */
1462 long tabstop = strtol (arg, &endptr, 10);
1463 if (*endptr == '\0' && tabstop >= 1 && tabstop <= 100)
1464 CPP_OPTION (pfile, tabstop) = tabstop;
1468 CPP_OPTION (pfile, inhibit_warnings) = 1;
1473 CPP_OPTION (pfile, help_only) = 1;
1475 case OPT_target__help:
1476 /* Print if any target specific options. cpplib has none, but
1477 make sure help_only gets set. */
1478 CPP_OPTION (pfile, help_only) = 1;
1481 /* --version inhibits compilation, -version doesn't. -v means
1482 verbose and -version. Historical reasons, don't ask. */
1484 CPP_OPTION (pfile, help_only) = 1;
1485 pfile->print_version = 1;
1488 CPP_OPTION (pfile, verbose) = 1;
1489 pfile->print_version = 1;
1492 pfile->print_version = 1;
1496 CPP_OPTION (pfile, discard_comments) = 0;
1499 CPP_OPTION (pfile, discard_comments) = 0;
1500 CPP_OPTION (pfile, discard_comments_in_macro_exp) = 0;
1503 CPP_OPTION (pfile, no_line_commands) = 1;
1505 case OPT_dollar: /* Don't include $ in identifiers. */
1506 CPP_OPTION (pfile, dollars_in_ident) = 0;
1509 CPP_OPTION (pfile, print_include_names) = 1;
1512 new_pending_directive (pend, arg, cpp_define);
1514 case OPT_pedantic_errors:
1515 CPP_OPTION (pfile, pedantic_errors) = 1;
1518 CPP_OPTION (pfile, pedantic) = 1;
1519 CPP_OPTION (pfile, warn_endif_labels) = 1;
1522 CPP_OPTION (pfile, trigraphs) = 1;
1525 CPP_OPTION (pfile, cplusplus) = 1;
1526 CPP_OPTION (pfile, cplusplus_comments) = 1;
1529 CPP_OPTION (pfile, remap) = 1;
1532 CPP_OPTION (pfile, include_prefix) = arg;
1533 CPP_OPTION (pfile, include_prefix_len) = strlen (arg);
1536 set_lang (pfile, CLK_GNUC89);
1538 case OPT_lang_cplusplus:
1539 set_lang (pfile, CLK_GNUCXX);
1542 set_lang (pfile, CLK_OBJC);
1544 case OPT_lang_objcplusplus:
1545 set_lang (pfile, CLK_OBJCXX);
1548 set_lang (pfile, CLK_ASM);
1550 case OPT_std_cplusplus98:
1551 set_lang (pfile, CLK_CXX98);
1554 set_lang (pfile, CLK_GNUC89);
1558 set_lang (pfile, CLK_GNUC99);
1560 case OPT_std_iso9899_199409:
1561 set_lang (pfile, CLK_STDC94);
1563 case OPT_std_iso9899_1990:
1566 set_lang (pfile, CLK_STDC89);
1568 case OPT_std_iso9899_199x:
1569 case OPT_std_iso9899_1999:
1572 set_lang (pfile, CLK_STDC99);
1575 /* -nostdinc causes no default include directories.
1576 You must specify all include-file directories with -I. */
1577 CPP_OPTION (pfile, no_standard_includes) = 1;
1579 case OPT_nostdincplusplus:
1580 /* -nostdinc++ causes no default C++-specific include directories. */
1581 CPP_OPTION (pfile, no_standard_cplusplus_includes) = 1;
1584 if (CPP_OPTION (pfile, out_fname) == NULL)
1585 CPP_OPTION (pfile, out_fname) = arg;
1588 cpp_error (pfile, DL_FATAL, "output filename specified twice");
1593 /* Args to -d specify what parts of macros to dump.
1594 Silently ignore unrecognised options; they may
1595 be aimed at the compiler proper. */
1599 while ((c = *arg++) != '\0')
1603 CPP_OPTION (pfile, dump_macros) = dump_only;
1606 CPP_OPTION (pfile, dump_macros) = dump_names;
1609 CPP_OPTION (pfile, dump_macros) = dump_definitions;
1612 CPP_OPTION (pfile, dump_includes) = 1;
1619 CPP_OPTION (pfile, print_deps_missing_files) = 1;
1622 /* When doing dependencies with -M or -MM, suppress normal
1623 preprocessed output, but still do -dM etc. as software
1624 depends on this. Preprocessed output occurs if -MD, -MMD
1625 or environment var dependency generation is used. */
1626 CPP_OPTION (pfile, print_deps) = 2;
1627 CPP_OPTION (pfile, no_output) = 1;
1630 CPP_OPTION (pfile, print_deps) = 1;
1631 CPP_OPTION (pfile, no_output) = 1;
1634 CPP_OPTION (pfile, deps_file) = arg;
1637 CPP_OPTION (pfile, deps_phony_targets) = 1;
1641 /* Add a target. -MQ quotes for Make. */
1642 deps_add_target (pfile->deps, arg, opt_code == OPT_MQ);
1646 CPP_OPTION (pfile, print_deps) = 2;
1647 CPP_OPTION (pfile, deps_file) = arg;
1650 CPP_OPTION (pfile, print_deps) = 1;
1651 CPP_OPTION (pfile, deps_file) = arg;
1657 /* -A with an argument beginning with '-' acts as
1658 #unassert on whatever immediately follows the '-'.
1659 If "-" is the whole argument, we eliminate all
1660 predefined macros and assertions, including those
1661 that were specified earlier on the command line.
1662 That way we can get rid of any that were passed
1663 automatically in from GCC. */
1667 free_chain (pend->directive_head);
1668 pend->directive_head = NULL;
1669 pend->directive_tail = NULL;
1672 new_pending_directive (pend, arg + 1, cpp_unassert);
1675 new_pending_directive (pend, arg, cpp_assert);
1678 new_pending_directive (pend, arg, cpp_undef);
1680 case OPT_I: /* Add directory to path for includes. */
1681 if (!strcmp (arg, "-"))
1684 Use the preceding -I directories for #include "..."
1685 but not #include <...>.
1686 Don't search the directory of the present file
1687 for #include "...". (Note that -I. -I- is not the same as
1688 the default setup; -I. uses the compiler's working dir.) */
1689 if (! CPP_OPTION (pfile, ignore_srcdir))
1691 pend->quote_head = pend->brack_head;
1692 pend->quote_tail = pend->brack_tail;
1693 pend->brack_head = 0;
1694 pend->brack_tail = 0;
1695 CPP_OPTION (pfile, ignore_srcdir) = 1;
1699 cpp_error (pfile, DL_FATAL, "-I- specified twice");
1704 append_include_chain (pfile, xstrdup (arg), BRACKET, 0);
1707 /* Add directory to beginning of system include path, as a system
1708 include directory. */
1709 append_include_chain (pfile, xstrdup (arg), SYSTEM, 0);
1714 struct pending_option *o = (struct pending_option *)
1715 xmalloc (sizeof (struct pending_option));
1719 if (opt_code == OPT_include)
1720 APPEND (pend, include, o);
1722 APPEND (pend, imacros, o);
1725 case OPT_iwithprefix:
1726 /* Add directory to end of path for includes,
1727 with the default prefix at the front of its name. */
1729 case OPT_iwithprefixbefore:
1730 /* Add directory to main path for includes,
1731 with the default prefix at the front of its name. */
1738 if (CPP_OPTION (pfile, include_prefix) != 0)
1740 size_t ipl = CPP_OPTION (pfile, include_prefix_len);
1741 fname = xmalloc (ipl + len + 1);
1742 memcpy (fname, CPP_OPTION (pfile, include_prefix), ipl);
1743 memcpy (fname + ipl, arg, len + 1);
1745 else if (cpp_GCC_INCLUDE_DIR_len)
1747 fname = xmalloc (cpp_GCC_INCLUDE_DIR_len + len + 1);
1748 memcpy (fname, cpp_GCC_INCLUDE_DIR, cpp_GCC_INCLUDE_DIR_len);
1749 memcpy (fname + cpp_GCC_INCLUDE_DIR_len, arg, len + 1);
1752 fname = xstrdup (arg);
1754 append_include_chain (pfile, fname,
1755 opt_code == OPT_iwithprefix ? SYSTEM: BRACKET, 0);
1759 /* Add directory to end of path for includes. */
1760 append_include_chain (pfile, xstrdup (arg), AFTER, 0);
1763 /* Silently ignore unrecognised options. */
1764 if (!strcmp (argv[i], "-Wall"))
1766 CPP_OPTION (pfile, warn_trigraphs) = 1;
1767 CPP_OPTION (pfile, warn_comments) = 1;
1769 else if (!strcmp (argv[i], "-Wtraditional"))
1770 CPP_OPTION (pfile, warn_traditional) = 1;
1771 else if (!strcmp (argv[i], "-Wtrigraphs"))
1772 CPP_OPTION (pfile, warn_trigraphs) = 1;
1773 else if (!strcmp (argv[i], "-Wcomment"))
1774 CPP_OPTION (pfile, warn_comments) = 1;
1775 else if (!strcmp (argv[i], "-Wcomments"))
1776 CPP_OPTION (pfile, warn_comments) = 1;
1777 else if (!strcmp (argv[i], "-Wundef"))
1778 CPP_OPTION (pfile, warn_undef) = 1;
1779 else if (!strcmp (argv[i], "-Wimport"))
1780 CPP_OPTION (pfile, warn_import) = 1;
1781 else if (!strcmp (argv[i], "-Werror"))
1782 CPP_OPTION (pfile, warnings_are_errors) = 1;
1783 else if (!strcmp (argv[i], "-Wsystem-headers"))
1784 CPP_OPTION (pfile, warn_system_headers) = 1;
1785 else if (!strcmp (argv[i], "-Wendif-labels"))
1786 CPP_OPTION (pfile, warn_endif_labels) = 1;
1787 else if (!strcmp (argv[i], "-Wno-traditional"))
1788 CPP_OPTION (pfile, warn_traditional) = 0;
1789 else if (!strcmp (argv[i], "-Wno-trigraphs"))
1790 CPP_OPTION (pfile, warn_trigraphs) = 0;
1791 else if (!strcmp (argv[i], "-Wno-comment"))
1792 CPP_OPTION (pfile, warn_comments) = 0;
1793 else if (!strcmp (argv[i], "-Wno-comments"))
1794 CPP_OPTION (pfile, warn_comments) = 0;
1795 else if (!strcmp (argv[i], "-Wno-undef"))
1796 CPP_OPTION (pfile, warn_undef) = 0;
1797 else if (!strcmp (argv[i], "-Wno-import"))
1798 CPP_OPTION (pfile, warn_import) = 0;
1799 else if (!strcmp (argv[i], "-Wno-error"))
1800 CPP_OPTION (pfile, warnings_are_errors) = 0;
1801 else if (!strcmp (argv[i], "-Wno-system-headers"))
1802 CPP_OPTION (pfile, warn_system_headers) = 0;
1803 else if (!strcmp (argv[i], "-Wno-endif-labels"))
1804 CPP_OPTION (pfile, warn_endif_labels) = 0;
1813 /* Handle command-line options in (argc, argv).
1814 Can be called multiple times, to handle multiple sets of options.
1815 Returns if an unrecognized option is seen.
1816 Returns number of strings consumed. */
1818 cpp_handle_options (pfile, argc, argv)
1824 int strings_processed;
1826 for (i = 0; i < argc; i += strings_processed)
1828 strings_processed = cpp_handle_option (pfile, argc - i, argv + i, 1);
1829 if (strings_processed == 0)
1836 /* Extra processing when all options are parsed, after all calls to
1837 cpp_handle_option[s]. Consistency checks etc. */
1839 cpp_post_options (pfile)
1842 if (pfile->print_version)
1844 fprintf (stderr, _("GNU CPP version %s (cpplib)"), version_string);
1845 #ifdef TARGET_VERSION
1848 fputc ('\n', stderr);
1851 /* Canonicalize in_fname and out_fname. We guarantee they are not
1852 NULL, and that the empty string represents stdin / stdout. */
1853 if (CPP_OPTION (pfile, in_fname) == NULL
1854 || !strcmp (CPP_OPTION (pfile, in_fname), "-"))
1855 CPP_OPTION (pfile, in_fname) = "";
1857 if (CPP_OPTION (pfile, out_fname) == NULL
1858 || !strcmp (CPP_OPTION (pfile, out_fname), "-"))
1859 CPP_OPTION (pfile, out_fname) = "";
1861 /* -Wtraditional is not useful in C++ mode. */
1862 if (CPP_OPTION (pfile, cplusplus))
1863 CPP_OPTION (pfile, warn_traditional) = 0;
1865 /* Set this if it hasn't been set already. */
1866 if (CPP_OPTION (pfile, user_label_prefix) == NULL)
1867 CPP_OPTION (pfile, user_label_prefix) = USER_LABEL_PREFIX;
1869 /* Permanently disable macro expansion if we are rescanning
1870 preprocessed text. */
1871 if (CPP_OPTION (pfile, preprocessed))
1872 pfile->state.prevent_expansion = 1;
1874 /* -dM makes no normal output. This is set here so that -dM -dD
1875 works as expected. */
1876 if (CPP_OPTION (pfile, dump_macros) == dump_only)
1877 CPP_OPTION (pfile, no_output) = 1;
1879 /* Disable -dD, -dN and -dI if we should make no normal output
1880 (such as with -M). Allow -M -dM since some software relies on
1882 if (CPP_OPTION (pfile, no_output))
1884 if (CPP_OPTION (pfile, dump_macros) != dump_only)
1885 CPP_OPTION (pfile, dump_macros) = dump_none;
1886 CPP_OPTION (pfile, dump_includes) = 0;
1889 /* We need to do this after option processing and before
1890 cpp_start_read, as cppmain.c relies on the options->no_output to
1891 set its callbacks correctly before calling cpp_start_read. */
1892 init_dependency_output (pfile);
1894 /* After checking the environment variables, check if -M or -MM has
1895 not been specified, but other -M options have. */
1896 if (CPP_OPTION (pfile, print_deps) == 0 &&
1897 (CPP_OPTION (pfile, print_deps_missing_files)
1898 || CPP_OPTION (pfile, deps_file)
1899 || CPP_OPTION (pfile, deps_phony_targets)))
1900 cpp_error (pfile, DL_FATAL,
1901 "you must additionally specify either -M or -MM");
1904 /* Set up dependency-file output. On exit, if print_deps is non-zero
1905 then deps_file is not NULL; stdout is the empty string. */
1907 init_dependency_output (pfile)
1910 char *spec, *s, *output_file;
1912 /* Either of two environment variables can specify output of deps.
1913 Its value is either "OUTPUT_FILE" or "OUTPUT_FILE DEPS_TARGET",
1914 where OUTPUT_FILE is the file to write deps info to
1915 and DEPS_TARGET is the target to mention in the deps. */
1917 if (CPP_OPTION (pfile, print_deps) == 0)
1919 spec = getenv ("DEPENDENCIES_OUTPUT");
1921 CPP_OPTION (pfile, print_deps) = 1;
1924 spec = getenv ("SUNPRO_DEPENDENCIES");
1926 CPP_OPTION (pfile, print_deps) = 2;
1931 /* Find the space before the DEPS_TARGET, if there is one. */
1932 s = strchr (spec, ' ');
1935 /* Let the caller perform MAKE quoting. */
1936 deps_add_target (pfile->deps, s + 1, 0);
1937 output_file = (char *) xmalloc (s - spec + 1);
1938 memcpy (output_file, spec, s - spec);
1939 output_file[s - spec] = 0;
1944 /* Command line -MF overrides environment variables and default. */
1945 if (CPP_OPTION (pfile, deps_file) == 0)
1946 CPP_OPTION (pfile, deps_file) = output_file;
1948 CPP_OPTION (pfile, print_deps_append) = 1;
1950 else if (CPP_OPTION (pfile, deps_file) == 0)
1951 /* If -M or -MM was seen without -MF, default output to wherever
1952 was specified with -o. out_fname is non-NULL here. */
1953 CPP_OPTION (pfile, deps_file) = CPP_OPTION (pfile, out_fname);
1956 /* Handle --help output. */
1960 /* To keep the lines from getting too long for some compilers, limit
1961 to about 500 characters (6 lines) per chunk. */
1964 -include <file> Include the contents of <file> before other files\n\
1965 -imacros <file> Accept definition of macros in <file>\n\
1966 -iprefix <path> Specify <path> as a prefix for next two options\n\
1967 -iwithprefix <dir> Add <dir> to the end of the system include path\n\
1968 -iwithprefixbefore <dir> Add <dir> to the end of the main include path\n\
1969 -isystem <dir> Add <dir> to the start of the system include path\n\
1972 -idirafter <dir> Add <dir> to the end of the system include path\n\
1973 -I <dir> Add <dir> to the end of the main include path\n\
1974 -I- Fine-grained include path control; see info docs\n\
1975 -nostdinc Do not search system include directories\n\
1976 (dirs specified with -isystem will still be used)\n\
1977 -nostdinc++ Do not search system include directories for C++\n\
1978 -o <file> Put output into <file>\n\
1981 -pedantic Issue all warnings demanded by strict ISO C\n\
1982 -pedantic-errors Issue -pedantic warnings as errors instead\n\
1983 -trigraphs Support ISO C trigraphs\n\
1984 -lang-c Assume that the input sources are in C\n\
1985 -lang-c89 Assume that the input sources are in C89\n\
1988 -lang-c++ Assume that the input sources are in C++\n\
1989 -lang-objc Assume that the input sources are in ObjectiveC\n\
1990 -lang-objc++ Assume that the input sources are in ObjectiveC++\n\
1991 -lang-asm Assume that the input sources are in assembler\n\
1994 -std=<std name> Specify the conformance standard; one of:\n\
1995 gnu89, gnu99, c89, c99, iso9899:1990,\n\
1996 iso9899:199409, iso9899:1999\n\
1997 -+ Allow parsing of C++ style features\n\
1998 -w Inhibit warning messages\n\
1999 -Wtrigraphs Warn if trigraphs are encountered\n\
2000 -Wno-trigraphs Do not warn about trigraphs\n\
2001 -Wcomment{s} Warn if one comment starts inside another\n\
2004 -Wno-comment{s} Do not warn about comments\n\
2005 -Wtraditional Warn about features not present in traditional C\n\
2006 -Wno-traditional Do not warn about traditional C\n\
2007 -Wundef Warn if an undefined macro is used by #if\n\
2008 -Wno-undef Do not warn about testing undefined macros\n\
2009 -Wimport Warn about the use of the #import directive\n\
2012 -Wno-import Do not warn about the use of #import\n\
2013 -Werror Treat all warnings as errors\n\
2014 -Wno-error Do not treat warnings as errors\n\
2015 -Wsystem-headers Do not suppress warnings from system headers\n\
2016 -Wno-system-headers Suppress warnings from system headers\n\
2017 -Wall Enable all preprocessor warnings\n\
2020 -M Generate make dependencies\n\
2021 -MM As -M, but ignore system header files\n\
2022 -MD Generate make dependencies and compile\n\
2023 -MMD As -MD, but ignore system header files\n\
2024 -MF <file> Write dependency output to the given file\n\
2025 -MG Treat missing header file as generated files\n\
2028 -MP Generate phony targets for all headers\n\
2029 -MQ <target> Add a MAKE-quoted target\n\
2030 -MT <target> Add an unquoted target\n\
2033 -D<macro> Define a <macro> with string '1' as its value\n\
2034 -D<macro>=<val> Define a <macro> with <val> as its value\n\
2035 -A<question>=<answer> Assert the <answer> to <question>\n\
2036 -A-<question>=<answer> Disable the <answer> to <question>\n\
2037 -U<macro> Undefine <macro> \n\
2038 -v Display the version number\n\
2041 -H Print the name of header files as they are used\n\
2042 -C Do not discard comments\n\
2043 -dM Display a list of macro definitions active at end\n\
2044 -dD Preserve macro definitions in output\n\
2045 -dN As -dD except that only the names are preserved\n\
2046 -dI Include #include directives in the output\n\
2049 -fpreprocessed Treat the input file as already preprocessed\n\
2050 -ftabstop=<number> Distance between tab stops for column reporting\n\
2051 -P Do not generate #line directives\n\
2052 -$ Do not allow '$' in identifiers\n\
2053 -remap Remap file names when including files\n\
2054 --version Display version information\n\
2055 -h or --help Display this information\n\