2 Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
4 Contributed by Per Bothner, 1994-95.
5 Based on CCCP program by Paul Rubin, June 1986
6 Adapted to ANSI C, Richard Stallman, Jan 1987
8 This program is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by the
10 Free Software Foundation; either version 2, or (at your option) any
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
30 #include "cppdefault.h"
31 #include "except.h" /* for USING_SJLJ_EXCEPTIONS */
33 /* Predefined symbols, built-in macros, and the default include path. */
35 #ifndef GET_ENV_PATH_LIST
36 #define GET_ENV_PATH_LIST(VAR,NAME) do { (VAR) = getenv (NAME); } while (0)
39 /* Windows does not natively support inodes, and neither does MSDOS.
40 Cygwin's emulation can generate non-unique inodes, so don't use it.
41 VMS has non-numeric inodes. */
43 # define INO_T_EQ(A, B) (!memcmp (&(A), &(B), sizeof (A)))
44 # define INO_T_COPY(DEST, SRC) memcpy(&(DEST), &(SRC), sizeof (SRC))
46 # if (defined _WIN32 && ! defined (_UWIN)) || defined __MSDOS__
47 # define INO_T_EQ(A, B) 0
49 # define INO_T_EQ(A, B) ((A) == (B))
51 # define INO_T_COPY(DEST, SRC) (DEST) = (SRC)
54 /* Internal structures and prototypes. */
56 /* A `struct pending_option' remembers one -D, -A, -U, -include, or
58 typedef void (* cl_directive_handler) PARAMS ((cpp_reader *, const char *));
61 struct pending_option *next;
63 cl_directive_handler handler;
66 /* The `pending' structure accumulates all the options that are not
67 actually processed until we hit cpp_read_main_file. It consists of
68 several lists, one for each type of option. We keep both head and
69 tail pointers for quick insertion. */
72 struct pending_option *directive_head, *directive_tail;
74 struct search_path *quote_head, *quote_tail;
75 struct search_path *brack_head, *brack_tail;
76 struct search_path *systm_head, *systm_tail;
77 struct search_path *after_head, *after_tail;
79 struct pending_option *imacros_head, *imacros_tail;
80 struct pending_option *include_head, *include_tail;
84 #define APPEND(pend, list, elt) \
85 do { if (!(pend)->list##_head) (pend)->list##_head = (elt); \
86 else (pend)->list##_tail->next = (elt); \
87 (pend)->list##_tail = (elt); \
90 #define APPEND(pend, list, elt) \
91 do { if (!(pend)->list/**/_head) (pend)->list/**/_head = (elt); \
92 else (pend)->list/**/_tail->next = (elt); \
93 (pend)->list/**/_tail = (elt); \
97 static void print_help PARAMS ((void));
98 static void path_include PARAMS ((cpp_reader *,
100 static void init_library PARAMS ((void));
101 static void init_builtins PARAMS ((cpp_reader *));
102 static void append_include_chain PARAMS ((cpp_reader *,
104 static struct search_path * remove_dup_dir PARAMS ((cpp_reader *,
105 struct search_path *));
106 static struct search_path * remove_dup_dirs PARAMS ((cpp_reader *,
107 struct search_path *));
108 static void merge_include_chains PARAMS ((cpp_reader *));
109 static bool push_include PARAMS ((cpp_reader *,
110 struct pending_option *));
111 static void free_chain PARAMS ((struct pending_option *));
112 static void set_lang PARAMS ((cpp_reader *, enum c_lang));
113 static void init_dependency_output PARAMS ((cpp_reader *));
114 static void init_standard_includes PARAMS ((cpp_reader *));
115 static void read_original_filename PARAMS ((cpp_reader *));
116 static void new_pending_directive PARAMS ((struct cpp_pending *,
118 cl_directive_handler));
119 static void output_deps PARAMS ((cpp_reader *));
120 static int parse_option PARAMS ((const char *));
122 /* Fourth argument to append_include_chain: chain to use.
123 Note it's never asked to append to the quote chain. */
124 enum { BRACKET = 0, SYSTEM, AFTER };
126 /* If we have designated initializers (GCC >2.7) these tables can be
127 initialized, constant data. Otherwise, they have to be filled in at
129 #if HAVE_DESIGNATED_INITIALIZERS
131 #define init_trigraph_map() /* Nothing. */
132 #define TRIGRAPH_MAP \
133 __extension__ const U_CHAR _cpp_trigraph_map[UCHAR_MAX + 1] = {
136 #define s(p, v) [p] = v,
140 #define TRIGRAPH_MAP U_CHAR _cpp_trigraph_map[UCHAR_MAX + 1] = { 0 }; \
141 static void init_trigraph_map PARAMS ((void)) { \
142 unsigned char *x = _cpp_trigraph_map;
145 #define s(p, v) x[p] = v;
150 s('=', '#') s(')', ']') s('!', '|')
151 s('(', '[') s('\'', '^') s('>', '}')
152 s('/', '\\') s('<', '{') s('-', '~')
159 /* Given a colon-separated list of file names PATH,
160 add all the names to the search path for include files. */
162 path_include (pfile, list, path)
173 /* Find the end of this name. */
175 while (*q != 0 && *q != PATH_SEPARATOR) q++;
178 /* An empty name in the path stands for the current directory. */
179 name = (char *) xmalloc (2);
185 /* Otherwise use the directory that is named. */
186 name = (char *) xmalloc (q - p + 1);
187 memcpy (name, p, q - p);
191 append_include_chain (pfile, name, path, 0);
193 /* Advance past this name. */
201 /* Append DIR to include path PATH. DIR must be allocated on the
202 heap; this routine takes responsibility for freeing it. CXX_AWARE
203 is non-zero if the header contains extern "C" guards for C++,
204 otherwise it is zero. */
206 append_include_chain (pfile, dir, path, cxx_aware)
210 int cxx_aware ATTRIBUTE_UNUSED;
212 struct cpp_pending *pend = CPP_OPTION (pfile, pending);
213 struct search_path *new;
222 _cpp_simplify_pathname (dir);
226 /* Dirs that don't exist are silently ignored. */
228 cpp_notice_from_errno (pfile, dir);
229 else if (CPP_OPTION (pfile, verbose))
230 fprintf (stderr, _("ignoring nonexistent directory \"%s\"\n"), dir);
235 if (!S_ISDIR (st.st_mode))
237 cpp_notice (pfile, "%s: Not a directory", dir);
243 if (len > pfile->max_include_len)
244 pfile->max_include_len = len;
246 new = (struct search_path *) xmalloc (sizeof (struct search_path));
249 INO_T_COPY (new->ino, st.st_ino);
250 new->dev = st.st_dev;
251 /* Both systm and after include file lists should be treated as system
252 include files since these two lists are really just a concatenation
253 of one "system" list. */
254 if (path == SYSTEM || path == AFTER)
255 #ifdef NO_IMPLICIT_EXTERN_C
258 new->sysp = cxx_aware ? 1 : 2;
262 new->name_map = NULL;
267 case BRACKET: APPEND (pend, brack, new); break;
268 case SYSTEM: APPEND (pend, systm, new); break;
269 case AFTER: APPEND (pend, after, new); break;
273 /* Handle a duplicated include path. PREV is the link in the chain
274 before the duplicate. The duplicate is removed from the chain and
275 freed. Returns PREV. */
276 static struct search_path *
277 remove_dup_dir (pfile, prev)
279 struct search_path *prev;
281 struct search_path *cur = prev->next;
283 if (CPP_OPTION (pfile, verbose))
284 fprintf (stderr, _("ignoring duplicate directory \"%s\"\n"), cur->name);
286 prev->next = cur->next;
287 free ((PTR) cur->name);
293 /* Remove duplicate directories from a chain. Returns the tail of the
294 chain, or NULL if the chain is empty. This algorithm is quadratic
295 in the number of -I switches, which is acceptable since there
296 aren't usually that many of them. */
297 static struct search_path *
298 remove_dup_dirs (pfile, head)
300 struct search_path *head;
302 struct search_path *prev = NULL, *cur, *other;
304 for (cur = head; cur; cur = cur->next)
306 for (other = head; other != cur; other = other->next)
307 if (INO_T_EQ (cur->ino, other->ino) && cur->dev == other->dev)
309 if (cur->sysp && !other->sysp)
312 "changing search order for system directory \"%s\"",
314 if (strcmp (cur->name, other->name))
316 " as it is the same as non-system directory \"%s\"",
320 " as it has already been specified as a non-system directory");
322 cur = remove_dup_dir (pfile, prev);
331 /* Merge the four include chains together in the order quote, bracket,
332 system, after. Remove duplicate dirs (as determined by
333 INO_T_EQ()). The system_include and after_include chains are never
334 referred to again after this function; all access is through the
335 bracket_include path. */
337 merge_include_chains (pfile)
340 struct search_path *quote, *brack, *systm, *qtail;
342 struct cpp_pending *pend = CPP_OPTION (pfile, pending);
344 quote = pend->quote_head;
345 brack = pend->brack_head;
346 systm = pend->systm_head;
347 qtail = pend->quote_tail;
349 /* Paste together bracket, system, and after include chains. */
351 pend->systm_tail->next = pend->after_head;
353 systm = pend->after_head;
356 pend->brack_tail->next = systm;
360 /* This is a bit tricky. First we drop dupes from the quote-include
361 list. Then we drop dupes from the bracket-include list.
362 Finally, if qtail and brack are the same directory, we cut out
363 brack and move brack up to point to qtail.
365 We can't just merge the lists and then uniquify them because
366 then we may lose directories from the <> search path that should
367 be there; consider -Ifoo -Ibar -I- -Ifoo -Iquux. It is however
368 safe to treat -Ibar -Ifoo -I- -Ifoo -Iquux as if written
369 -Ibar -I- -Ifoo -Iquux. */
371 remove_dup_dirs (pfile, brack);
372 qtail = remove_dup_dirs (pfile, quote);
378 /* If brack == qtail, remove brack as it's simpler. */
379 if (INO_T_EQ (qtail->ino, brack->ino) && qtail->dev == brack->dev)
380 brack = remove_dup_dir (pfile, qtail);
385 CPP_OPTION (pfile, quote_include) = quote;
386 CPP_OPTION (pfile, bracket_include) = brack;
389 /* A set of booleans indicating what CPP features each source language
396 char extended_numbers;
398 char dollars_in_ident;
399 char cplusplus_comments;
403 /* ??? Enable $ in identifiers in assembly? */
404 static const struct lang_flags lang_defaults[] =
405 { /* c99 objc c++ xnum trig dollar c++comm digr */
406 /* GNUC89 */ { 0, 0, 0, 1, 0, 1, 1, 1 },
407 /* GNUC99 */ { 1, 0, 0, 1, 0, 1, 1, 1 },
408 /* STDC89 */ { 0, 0, 0, 0, 1, 0, 0, 0 },
409 /* STDC94 */ { 0, 0, 0, 0, 1, 0, 0, 1 },
410 /* STDC99 */ { 1, 0, 0, 1, 1, 0, 1, 1 },
411 /* GNUCXX */ { 0, 0, 1, 1, 0, 1, 1, 1 },
412 /* CXX98 */ { 0, 0, 1, 1, 1, 0, 1, 1 },
413 /* OBJC */ { 0, 1, 0, 1, 0, 1, 1, 1 },
414 /* OBJCXX */ { 0, 1, 1, 1, 0, 1, 1, 1 },
415 /* ASM */ { 0, 0, 0, 1, 0, 0, 1, 0 }
418 /* Sets internal flags correctly for a given language. */
420 set_lang (pfile, lang)
424 const struct lang_flags *l = &lang_defaults[(int) lang];
426 CPP_OPTION (pfile, lang) = lang;
428 CPP_OPTION (pfile, c99) = l->c99;
429 CPP_OPTION (pfile, objc) = l->objc;
430 CPP_OPTION (pfile, cplusplus) = l->cplusplus;
431 CPP_OPTION (pfile, extended_numbers) = l->extended_numbers;
432 CPP_OPTION (pfile, trigraphs) = l->trigraphs;
433 CPP_OPTION (pfile, dollars_in_ident) = l->dollars_in_ident;
434 CPP_OPTION (pfile, cplusplus_comments) = l->cplusplus_comments;
435 CPP_OPTION (pfile, digraphs) = l->digraphs;
439 static int opt_comp PARAMS ((const void *, const void *));
441 /* Run-time sorting of options array. */
446 return strcmp (((struct cl_option *) p1)->opt_text,
447 ((struct cl_option *) p2)->opt_text);
451 /* init initializes library global state. It might not need to
452 do anything depending on the platform and compiler. */
456 static int initialized = 0;
463 /* For non-ASCII hosts, the cl_options array needs to be sorted at
465 qsort (cl_options, N_OPTS, sizeof (struct cl_option), opt_comp);
468 /* Set up the trigraph map. This doesn't need to do anything if
469 we were compiled with a compiler that supports C99 designated
471 init_trigraph_map ();
475 /* Initialize a cpp_reader structure. */
477 cpp_create_reader (lang)
482 /* Initialise this instance of the library if it hasn't been already. */
485 pfile = (cpp_reader *) xcalloc (1, sizeof (cpp_reader));
487 set_lang (pfile, lang);
488 CPP_OPTION (pfile, warn_import) = 1;
489 CPP_OPTION (pfile, discard_comments) = 1;
490 CPP_OPTION (pfile, show_column) = 1;
491 CPP_OPTION (pfile, tabstop) = 8;
492 CPP_OPTION (pfile, operator_names) = 1;
494 CPP_OPTION (pfile, pending) =
495 (struct cpp_pending *) xcalloc (1, sizeof (struct cpp_pending));
497 /* It's simplest to just create this struct whether or not it will
499 pfile->deps = deps_init ();
501 /* Initialise the line map. Start at logical line 1, so we can use
502 a line number of zero for special states. */
503 init_line_maps (&pfile->line_maps);
506 /* Initialize lexer state. */
507 pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments);
509 /* Set up static tokens. */
510 pfile->date.type = CPP_EOF;
511 pfile->avoid_paste.type = CPP_PADDING;
512 pfile->avoid_paste.val.source = NULL;
513 pfile->eof.type = CPP_EOF;
514 pfile->eof.flags = 0;
516 /* Create a token buffer for the lexer. */
517 _cpp_init_tokenrun (&pfile->base_run, 250);
518 pfile->cur_run = &pfile->base_run;
519 pfile->cur_token = pfile->base_run.base;
521 /* Initialise the base context. */
522 pfile->context = &pfile->base_context;
523 pfile->base_context.macro = 0;
524 pfile->base_context.prev = pfile->base_context.next = 0;
526 /* Aligned and unaligned storage. */
527 pfile->a_buff = _cpp_get_buff (pfile, 0);
528 pfile->u_buff = _cpp_get_buff (pfile, 0);
530 /* Initialise the buffer obstack. */
531 gcc_obstack_init (&pfile->buffer_ob);
533 _cpp_init_includes (pfile);
538 /* Free resources used by PFILE. Accessing PFILE after this function
539 returns leads to undefined behaviour. Returns the error count. */
545 struct search_path *dir, *dirn;
546 cpp_context *context, *contextn;
547 tokenrun *run, *runn;
549 while (CPP_BUFFER (pfile) != NULL)
550 _cpp_pop_buffer (pfile);
552 if (pfile->macro_buffer)
554 free ((PTR) pfile->macro_buffer);
555 pfile->macro_buffer = NULL;
556 pfile->macro_buffer_len = 0;
559 deps_free (pfile->deps);
560 obstack_free (&pfile->buffer_ob, 0);
562 _cpp_destroy_hashtable (pfile);
563 _cpp_cleanup_includes (pfile);
565 _cpp_free_buff (pfile->a_buff);
566 _cpp_free_buff (pfile->u_buff);
567 _cpp_free_buff (pfile->free_buffs);
569 for (run = &pfile->base_run; run; run = runn)
573 if (run != &pfile->base_run)
577 for (dir = CPP_OPTION (pfile, quote_include); dir; dir = dirn)
580 free ((PTR) dir->name);
584 for (context = pfile->base_context.next; context; context = contextn)
586 contextn = context->next;
590 free_line_maps (&pfile->line_maps);
592 result = pfile->errors;
599 /* This structure defines one built-in identifier. A node will be
600 entered in the hash table under the name NAME, with value VALUE (if
601 any). If flags has OPERATOR, the node's operator field is used; if
602 flags has BUILTIN the node's builtin field is used. Macros that are
603 known at build time should not be flagged BUILTIN, as then they do
604 not appear in macro dumps with e.g. -dM or -dD.
606 Two values are not compile time constants, so we tag
607 them in the FLAGS field instead:
608 VERS value is the global version_string, quoted
609 ULP value is the global user_label_prefix
611 Also, macros with CPLUS set in the flags field are entered only for C++. */
616 unsigned char builtin;
617 unsigned char operator;
618 unsigned short flags;
625 #define OPERATOR 0x10
627 #define B(n, t) { U n, 0, t, 0, BUILTIN, sizeof n - 1 }
628 #define C(n, v) { U n, v, 0, 0, 0, sizeof n - 1 }
629 #define X(n, f) { U n, 0, 0, 0, f, sizeof n - 1 }
630 #define O(n, c, f) { U n, 0, 0, c, OPERATOR | f, sizeof n - 1 }
631 static const struct builtin builtin_array[] =
633 B("__TIME__", BT_TIME),
634 B("__DATE__", BT_DATE),
635 B("__FILE__", BT_FILE),
636 B("__BASE_FILE__", BT_BASE_FILE),
637 B("__LINE__", BT_SPECLINE),
638 B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL),
639 B("_Pragma", BT_PRAGMA),
641 X("__VERSION__", VERS),
642 X("__USER_LABEL_PREFIX__", ULP),
643 C("__REGISTER_PREFIX__", REGISTER_PREFIX),
644 C("__HAVE_BUILTIN_SETJMP__", "1"),
645 #if USING_SJLJ_EXCEPTIONS
646 /* libgcc needs to know this. */
647 C("__USING_SJLJ_EXCEPTIONS__","1"),
649 #ifndef NO_BUILTIN_SIZE_TYPE
650 C("__SIZE_TYPE__", SIZE_TYPE),
652 #ifndef NO_BUILTIN_PTRDIFF_TYPE
653 C("__PTRDIFF_TYPE__", PTRDIFF_TYPE),
655 #ifndef NO_BUILTIN_WCHAR_TYPE
656 C("__WCHAR_TYPE__", WCHAR_TYPE),
658 #ifndef NO_BUILTIN_WINT_TYPE
659 C("__WINT_TYPE__", WINT_TYPE),
661 #ifdef STDC_0_IN_SYSTEM_HEADERS
662 B("__STDC__", BT_STDC),
667 /* Named operators known to the preprocessor. These cannot be #defined
668 and always have their stated meaning. They are treated like normal
669 identifiers except for the type code and the meaning. Most of them
670 are only for C++ (but see iso646.h). */
671 O("and", CPP_AND_AND, CPLUS),
672 O("and_eq", CPP_AND_EQ, CPLUS),
673 O("bitand", CPP_AND, CPLUS),
674 O("bitor", CPP_OR, CPLUS),
675 O("compl", CPP_COMPL, CPLUS),
676 O("not", CPP_NOT, CPLUS),
677 O("not_eq", CPP_NOT_EQ, CPLUS),
678 O("or", CPP_OR_OR, CPLUS),
679 O("or_eq", CPP_OR_EQ, CPLUS),
680 O("xor", CPP_XOR, CPLUS),
681 O("xor_eq", CPP_XOR_EQ, CPLUS)
687 #define builtin_array_end \
688 builtin_array + sizeof(builtin_array)/sizeof(struct builtin)
690 /* Subroutine of cpp_read_main_file; reads the builtins table above and
691 enters them, and language-specific macros, into the hash table. */
693 init_builtins (pfile)
696 const struct builtin *b;
698 for(b = builtin_array; b < builtin_array_end; b++)
700 if ((b->flags & CPLUS) && ! CPP_OPTION (pfile, cplusplus))
703 if ((b->flags & OPERATOR) && ! CPP_OPTION (pfile, operator_names))
706 if (b->flags & (OPERATOR | BUILTIN))
708 cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len);
709 if (b->flags & OPERATOR)
711 hp->flags |= NODE_OPERATOR;
712 hp->value.operator = b->operator;
717 hp->flags |= NODE_BUILTIN | NODE_WARN;
718 hp->value.builtin = b->builtin;
721 else /* A standard macro of some kind. */
728 /* Allocate enough space for 'name "value"\n\0'. */
729 str = alloca (b->len + strlen (version_string) + 5);
730 sprintf (str, "%s \"%s\"\n", b->name, version_string);
735 val = CPP_OPTION (pfile, user_label_prefix);
739 /* Allocate enough space for "name value\n\0". */
740 str = alloca (b->len + strlen (val) + 3);
741 sprintf(str, "%s %s\n", b->name, val);
744 _cpp_define_builtin (pfile, str);
748 if (CPP_OPTION (pfile, cplusplus))
750 _cpp_define_builtin (pfile, "__cplusplus 1");
751 if (SUPPORTS_ONE_ONLY)
752 _cpp_define_builtin (pfile, "__GXX_WEAK__ 1");
754 _cpp_define_builtin (pfile, "__GXX_WEAK__ 0");
756 if (CPP_OPTION (pfile, objc))
757 _cpp_define_builtin (pfile, "__OBJC__ 1");
759 if (CPP_OPTION (pfile, lang) == CLK_STDC94)
760 _cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L");
761 else if (CPP_OPTION (pfile, c99))
762 _cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L");
764 if (CPP_OPTION (pfile, lang) == CLK_STDC89
765 || CPP_OPTION (pfile, lang) == CLK_STDC94
766 || CPP_OPTION (pfile, lang) == CLK_STDC99)
767 _cpp_define_builtin (pfile, "__STRICT_ANSI__ 1");
768 else if (CPP_OPTION (pfile, lang) == CLK_ASM)
769 _cpp_define_builtin (pfile, "__ASSEMBLER__ 1");
776 #undef builtin_array_end
778 /* And another subroutine. This one sets up the standard include path. */
780 init_standard_includes (pfile)
784 const struct default_include *p;
785 const char *specd_prefix = CPP_OPTION (pfile, include_prefix);
787 /* Several environment variables may add to the include search path.
788 CPATH specifies an additional list of directories to be searched
789 as if specified with -I, while C_INCLUDE_PATH, CPLUS_INCLUDE_PATH,
790 etc. specify an additional list of directories to be searched as
791 if specified with -isystem, for the language indicated. */
793 GET_ENV_PATH_LIST (path, "CPATH");
794 if (path != 0 && *path != 0)
795 path_include (pfile, path, BRACKET);
797 switch ((CPP_OPTION (pfile, objc) << 1) + CPP_OPTION (pfile, cplusplus))
800 GET_ENV_PATH_LIST (path, "C_INCLUDE_PATH");
803 GET_ENV_PATH_LIST (path, "CPLUS_INCLUDE_PATH");
806 GET_ENV_PATH_LIST (path, "OBJC_INCLUDE_PATH");
809 GET_ENV_PATH_LIST (path, "OBJCPLUS_INCLUDE_PATH");
812 if (path != 0 && *path != 0)
813 path_include (pfile, path, SYSTEM);
815 /* Search "translated" versions of GNU directories.
816 These have /usr/local/lib/gcc... replaced by specd_prefix. */
817 if (specd_prefix != 0 && cpp_GCC_INCLUDE_DIR_len)
819 /* Remove the `include' from /usr/local/lib/gcc.../include.
820 GCC_INCLUDE_DIR will always end in /include. */
821 int default_len = cpp_GCC_INCLUDE_DIR_len;
822 char *default_prefix = (char *) alloca (default_len + 1);
823 int specd_len = strlen (specd_prefix);
825 memcpy (default_prefix, cpp_GCC_INCLUDE_DIR, default_len);
826 default_prefix[default_len] = '\0';
828 for (p = cpp_include_defaults; p->fname; p++)
830 /* Some standard dirs are only for C++. */
832 || (CPP_OPTION (pfile, cplusplus)
833 && !CPP_OPTION (pfile, no_standard_cplusplus_includes)))
835 /* Does this dir start with the prefix? */
836 if (!memcmp (p->fname, default_prefix, default_len))
838 /* Yes; change prefix and add to search list. */
839 int flen = strlen (p->fname);
840 int this_len = specd_len + flen - default_len;
841 char *str = (char *) xmalloc (this_len + 1);
842 memcpy (str, specd_prefix, specd_len);
843 memcpy (str + specd_len,
844 p->fname + default_len,
845 flen - default_len + 1);
847 append_include_chain (pfile, str, SYSTEM, p->cxx_aware);
853 /* Search ordinary names for GNU include directories. */
854 for (p = cpp_include_defaults; p->fname; p++)
856 /* Some standard dirs are only for C++. */
858 || (CPP_OPTION (pfile, cplusplus)
859 && !CPP_OPTION (pfile, no_standard_cplusplus_includes)))
861 char *str = update_path (p->fname, p->component);
862 append_include_chain (pfile, str, SYSTEM, p->cxx_aware);
867 /* Pushes a command line -imacro and -include file indicated by P onto
868 the buffer stack. Returns non-zero if successful. */
870 push_include (pfile, p)
872 struct pending_option *p;
876 /* Later: maybe update this to use the #include "" search path
877 if cpp_read_file fails. */
878 header.type = CPP_STRING;
879 header.val.str.text = (const unsigned char *) p->arg;
880 header.val.str.len = strlen (p->arg);
881 /* Make the command line directive take up a line. */
884 return _cpp_execute_include (pfile, &header, IT_CMDLINE);
887 /* Frees a pending_option chain. */
890 struct pending_option *head;
892 struct pending_option *next;
902 /* This is called after options have been parsed, and partially
903 processed. Setup for processing input from the file named FNAME,
904 or stdin if it is the empty string. Return the original filename
905 on success (e.g. foo.i->foo.c), or NULL on failure. */
907 cpp_read_main_file (pfile, fname, table)
912 /* The front ends don't set up the hash table until they have
913 finished processing the command line options, so initializing the
914 hashtable is deferred until now. */
915 _cpp_init_hashtable (pfile, table);
917 /* Set up the include search path now. */
918 if (! CPP_OPTION (pfile, no_standard_includes))
919 init_standard_includes (pfile);
921 merge_include_chains (pfile);
923 /* With -v, print the list of dirs to search. */
924 if (CPP_OPTION (pfile, verbose))
926 struct search_path *l;
927 fprintf (stderr, _("#include \"...\" search starts here:\n"));
928 for (l = CPP_OPTION (pfile, quote_include); l; l = l->next)
930 if (l == CPP_OPTION (pfile, bracket_include))
931 fprintf (stderr, _("#include <...> search starts here:\n"));
932 fprintf (stderr, " %s\n", l->name);
934 fprintf (stderr, _("End of search list.\n"));
937 if (CPP_OPTION (pfile, print_deps))
938 /* Set the default target (if there is none already). */
939 deps_add_default_target (pfile->deps, fname);
941 /* Open the main input file. */
942 if (!_cpp_read_file (pfile, fname))
945 /* Set this after cpp_post_options so the client can change the
946 option if it wishes, and after stacking the main file so we don't
947 trace the main file. */
948 pfile->line_maps.trace_includes = CPP_OPTION (pfile, print_include_names);
950 /* For foo.i, read the original filename foo.c now, for the benefit
951 of the front ends. */
952 if (CPP_OPTION (pfile, preprocessed))
953 read_original_filename (pfile);
955 return pfile->map->to_file;
958 /* For preprocessed files, if the first tokens are of the form # NUM.
959 handle the directive so we know the original file name. This will
960 generate file_change callbacks, which the front ends must handle
961 appropriately given their state of initialization. */
963 read_original_filename (pfile)
966 const cpp_token *token, *token1;
968 /* Lex ahead; if the first tokens are of the form # NUM, then
969 process the directive, otherwise back up. */
970 token = _cpp_lex_direct (pfile);
971 if (token->type == CPP_HASH)
973 token1 = _cpp_lex_direct (pfile);
974 _cpp_backup_tokens (pfile, 1);
976 /* If it's a #line directive, handle it. */
977 if (token1->type == CPP_NUMBER)
979 _cpp_handle_directive (pfile, token->flags & PREV_WHITE);
984 /* Backup as if nothing happened. */
985 _cpp_backup_tokens (pfile, 1);
988 /* Handle pending command line options: -D, -U, -A, -imacros and
989 -include. This should be called after debugging has been properly
990 set up in the front ends. */
992 cpp_finish_options (pfile)
995 /* Install builtins and process command line macros etc. in the order
996 they appeared, but only if not already preprocessed. */
997 if (! CPP_OPTION (pfile, preprocessed))
999 struct pending_option *p;
1001 _cpp_do_file_change (pfile, LC_RENAME, _("<built-in>"), 1, 0);
1002 init_builtins (pfile);
1003 _cpp_do_file_change (pfile, LC_RENAME, _("<command line>"), 1, 0);
1004 for (p = CPP_OPTION (pfile, pending)->directive_head; p; p = p->next)
1005 (*p->handler) (pfile, p->arg);
1007 /* Scan -imacros files after command line defines, but before
1008 files given with -include. */
1009 while ((p = CPP_OPTION (pfile, pending)->imacros_head) != NULL)
1011 if (push_include (pfile, p))
1013 pfile->buffer->return_at_eof = true;
1014 cpp_scan_nooutput (pfile);
1016 CPP_OPTION (pfile, pending)->imacros_head = p->next;
1021 free_chain (CPP_OPTION (pfile, pending)->directive_head);
1022 _cpp_push_next_buffer (pfile);
1025 /* Called to push the next buffer on the stack given by -include. If
1026 there are none, free the pending structure and restore the line map
1027 for the main file. */
1029 _cpp_push_next_buffer (pfile)
1032 bool pushed = false;
1034 /* This is't pretty; we'd rather not be relying on this as a boolean
1035 for reverting the line map. Further, we only free the chains in
1036 this conditional, so an early call to cpp_finish / cpp_destroy
1037 will leak that memory. */
1038 if (CPP_OPTION (pfile, pending)
1039 && CPP_OPTION (pfile, pending)->imacros_head == NULL)
1043 struct pending_option *p = CPP_OPTION (pfile, pending)->include_head;
1047 if (! CPP_OPTION (pfile, preprocessed))
1048 pushed = push_include (pfile, p);
1049 CPP_OPTION (pfile, pending)->include_head = p->next;
1055 free (CPP_OPTION (pfile, pending));
1056 CPP_OPTION (pfile, pending) = NULL;
1058 /* Restore the line map for the main file. */
1059 if (! CPP_OPTION (pfile, preprocessed))
1060 _cpp_do_file_change (pfile, LC_RENAME,
1061 pfile->line_maps.maps[0].to_file, 1, 0);
1068 /* Use mkdeps.c to output dependency information. */
1073 /* Stream on which to print the dependency information. */
1074 FILE *deps_stream = 0;
1075 const char *const deps_mode =
1076 CPP_OPTION (pfile, print_deps_append) ? "a" : "w";
1078 if (CPP_OPTION (pfile, deps_file) == 0)
1079 deps_stream = stdout;
1082 deps_stream = fopen (CPP_OPTION (pfile, deps_file), deps_mode);
1083 if (deps_stream == 0)
1085 cpp_notice_from_errno (pfile, CPP_OPTION (pfile, deps_file));
1090 deps_write (pfile->deps, deps_stream, 72);
1092 if (CPP_OPTION (pfile, deps_phony_targets))
1093 deps_phony_targets (pfile->deps, deps_stream);
1095 /* Don't close stdout. */
1096 if (CPP_OPTION (pfile, deps_file))
1098 if (ferror (deps_stream) || fclose (deps_stream) != 0)
1099 cpp_fatal (pfile, "I/O error on output");
1103 /* This is called at the end of preprocessing. It pops the
1104 last buffer and writes dependency output. It should also
1105 clear macro definitions, such that you could call cpp_start_read
1106 with a new filename to restart processing. */
1111 /* cpplex.c leaves the final buffer on the stack. This it so that
1112 it returns an unending stream of CPP_EOFs to the client. If we
1113 popped the buffer, we'd dereference a NULL buffer pointer and
1114 segfault. It's nice to allow the client to do worry-free excess
1115 cpp_get_token calls. */
1116 while (pfile->buffer)
1117 _cpp_pop_buffer (pfile);
1119 /* Don't write the deps file if preprocessing has failed. */
1120 if (CPP_OPTION (pfile, print_deps) && pfile->errors == 0)
1121 output_deps (pfile);
1123 /* Report on headers that could use multiple include guards. */
1124 if (CPP_OPTION (pfile, print_include_names))
1125 _cpp_report_missing_guards (pfile);
1128 /* Add a directive to be handled later in the initialization phase. */
1130 new_pending_directive (pend, text, handler)
1131 struct cpp_pending *pend;
1133 cl_directive_handler handler;
1135 struct pending_option *o = (struct pending_option *)
1136 xmalloc (sizeof (struct pending_option));
1140 o->handler = handler;
1141 APPEND (pend, directive, o);
1144 /* Irix6 "cc -n32" and OSF4 cc have problems with char foo[] = ("string");
1145 I.e. a const string initializer with parens around it. That is
1146 what N_("string") resolves to, so we make no_* be macros instead. */
1147 #define no_arg N_("argument missing after %s")
1148 #define no_ass N_("assertion missing after %s")
1149 #define no_dir N_("directory name missing after %s")
1150 #define no_fil N_("file name missing after %s")
1151 #define no_mac N_("macro name missing after %s")
1152 #define no_pth N_("path name missing after %s")
1153 #define no_num N_("number missing after %s")
1154 #define no_tgt N_("target missing after %s")
1156 /* This is the list of all command line options, with the leading
1157 "-" removed. It must be sorted in ASCII collating order. */
1158 #define COMMAND_LINE_OPTIONS \
1159 DEF_OPT("$", 0, OPT_dollar) \
1160 DEF_OPT("+", 0, OPT_plus) \
1161 DEF_OPT("-help", 0, OPT__help) \
1162 DEF_OPT("-target-help", 0, OPT_target__help) \
1163 DEF_OPT("-version", 0, OPT__version) \
1164 DEF_OPT("A", no_ass, OPT_A) \
1165 DEF_OPT("C", 0, OPT_C) \
1166 DEF_OPT("D", no_mac, OPT_D) \
1167 DEF_OPT("H", 0, OPT_H) \
1168 DEF_OPT("I", no_dir, OPT_I) \
1169 DEF_OPT("M", 0, OPT_M) \
1170 DEF_OPT("MD", no_fil, OPT_MD) \
1171 DEF_OPT("MF", no_fil, OPT_MF) \
1172 DEF_OPT("MG", 0, OPT_MG) \
1173 DEF_OPT("MM", 0, OPT_MM) \
1174 DEF_OPT("MMD", no_fil, OPT_MMD) \
1175 DEF_OPT("MP", 0, OPT_MP) \
1176 DEF_OPT("MQ", no_tgt, OPT_MQ) \
1177 DEF_OPT("MT", no_tgt, OPT_MT) \
1178 DEF_OPT("P", 0, OPT_P) \
1179 DEF_OPT("U", no_mac, OPT_U) \
1180 DEF_OPT("W", no_arg, OPT_W) /* arg optional */ \
1181 DEF_OPT("d", no_arg, OPT_d) \
1182 DEF_OPT("fleading-underscore", 0, OPT_fleading_underscore) \
1183 DEF_OPT("fno-leading-underscore", 0, OPT_fno_leading_underscore) \
1184 DEF_OPT("fno-operator-names", 0, OPT_fno_operator_names) \
1185 DEF_OPT("fno-preprocessed", 0, OPT_fno_preprocessed) \
1186 DEF_OPT("fno-show-column", 0, OPT_fno_show_column) \
1187 DEF_OPT("fpreprocessed", 0, OPT_fpreprocessed) \
1188 DEF_OPT("fshow-column", 0, OPT_fshow_column) \
1189 DEF_OPT("ftabstop=", no_num, OPT_ftabstop) \
1190 DEF_OPT("h", 0, OPT_h) \
1191 DEF_OPT("idirafter", no_dir, OPT_idirafter) \
1192 DEF_OPT("imacros", no_fil, OPT_imacros) \
1193 DEF_OPT("include", no_fil, OPT_include) \
1194 DEF_OPT("iprefix", no_pth, OPT_iprefix) \
1195 DEF_OPT("isystem", no_dir, OPT_isystem) \
1196 DEF_OPT("iwithprefix", no_dir, OPT_iwithprefix) \
1197 DEF_OPT("iwithprefixbefore", no_dir, OPT_iwithprefixbefore) \
1198 DEF_OPT("lang-asm", 0, OPT_lang_asm) \
1199 DEF_OPT("lang-c", 0, OPT_lang_c) \
1200 DEF_OPT("lang-c++", 0, OPT_lang_cplusplus) \
1201 DEF_OPT("lang-c89", 0, OPT_lang_c89) \
1202 DEF_OPT("lang-objc", 0, OPT_lang_objc) \
1203 DEF_OPT("lang-objc++", 0, OPT_lang_objcplusplus) \
1204 DEF_OPT("nostdinc", 0, OPT_nostdinc) \
1205 DEF_OPT("nostdinc++", 0, OPT_nostdincplusplus) \
1206 DEF_OPT("o", no_fil, OPT_o) \
1207 DEF_OPT("pedantic", 0, OPT_pedantic) \
1208 DEF_OPT("pedantic-errors", 0, OPT_pedantic_errors) \
1209 DEF_OPT("remap", 0, OPT_remap) \
1210 DEF_OPT("std=c++98", 0, OPT_std_cplusplus98) \
1211 DEF_OPT("std=c89", 0, OPT_std_c89) \
1212 DEF_OPT("std=c99", 0, OPT_std_c99) \
1213 DEF_OPT("std=c9x", 0, OPT_std_c9x) \
1214 DEF_OPT("std=gnu89", 0, OPT_std_gnu89) \
1215 DEF_OPT("std=gnu99", 0, OPT_std_gnu99) \
1216 DEF_OPT("std=gnu9x", 0, OPT_std_gnu9x) \
1217 DEF_OPT("std=iso9899:1990", 0, OPT_std_iso9899_1990) \
1218 DEF_OPT("std=iso9899:199409", 0, OPT_std_iso9899_199409) \
1219 DEF_OPT("std=iso9899:1999", 0, OPT_std_iso9899_1999) \
1220 DEF_OPT("std=iso9899:199x", 0, OPT_std_iso9899_199x) \
1221 DEF_OPT("trigraphs", 0, OPT_trigraphs) \
1222 DEF_OPT("v", 0, OPT_v) \
1223 DEF_OPT("version", 0, OPT_version) \
1224 DEF_OPT("w", 0, OPT_w)
1226 #define DEF_OPT(text, msg, code) code,
1229 COMMAND_LINE_OPTIONS
1236 const char *opt_text;
1239 enum opt_code opt_code;
1242 #define DEF_OPT(text, msg, code) { text, msg, sizeof(text) - 1, code },
1244 static struct cl_option cl_options[] =
1246 static const struct cl_option cl_options[] =
1249 COMMAND_LINE_OPTIONS
1252 #undef COMMAND_LINE_OPTIONS
1254 /* Perform a binary search to find which, if any, option the given
1255 command-line matches. Returns its index in the option array,
1256 negative on failure. Complications arise since some options can be
1257 suffixed with an argument, and multiple complete matches can occur,
1258 e.g. -iwithprefix and -iwithprefixbefore. Moreover, we need to
1259 accept options beginning with -W that we do not recognise, but not
1260 to swallow any subsequent command line argument; this is handled as
1261 special cases in cpp_handle_option. */
1263 parse_option (input)
1266 unsigned int md, mn, mx;
1277 opt_len = cl_options[md].opt_len;
1278 comp = memcmp (input, cl_options[md].opt_text, opt_len);
1286 if (input[opt_len] == '\0')
1288 /* We were passed more text. If the option takes an argument,
1289 we may match a later option or we may have been passed the
1290 argument. The longest possible option match succeeds.
1291 If the option takes no arguments we have not matched and
1292 continue the search (e.g. input="stdc++" match was "stdc"). */
1294 if (cl_options[md].msg)
1296 /* Scan forwards. If we get an exact match, return it.
1297 Otherwise, return the longest option-accepting match.
1298 This loops no more than twice with current options. */
1300 for (; mn < (unsigned int) N_OPTS; mn++)
1302 opt_len = cl_options[mn].opt_len;
1303 if (memcmp (input, cl_options[mn].opt_text, opt_len))
1305 if (input[opt_len] == '\0')
1307 if (cl_options[mn].msg)
1318 /* Handle one command-line option in (argc, argv).
1319 Can be called multiple times, to handle multiple sets of options.
1320 If ignore is non-zero, this will ignore unrecognized -W* options.
1321 Returns number of strings consumed. */
1323 cpp_handle_option (pfile, argc, argv, ignore)
1330 struct cpp_pending *pend = CPP_OPTION (pfile, pending);
1332 /* Interpret "-" or a non-option as a file name. */
1333 if (argv[i][0] != '-' || argv[i][1] == '\0')
1335 if (CPP_OPTION (pfile, in_fname) == NULL)
1336 CPP_OPTION (pfile, in_fname) = argv[i];
1337 else if (CPP_OPTION (pfile, out_fname) == NULL)
1338 CPP_OPTION (pfile, out_fname) = argv[i];
1340 cpp_fatal (pfile, "too many filenames. Type %s --help for usage info",
1345 enum opt_code opt_code;
1347 const char *arg = 0;
1349 /* Skip over '-'. */
1350 opt_index = parse_option (&argv[i][1]);
1354 opt_code = cl_options[opt_index].opt_code;
1355 if (cl_options[opt_index].msg)
1357 arg = &argv[i][cl_options[opt_index].opt_len + 1];
1359 /* Yuk. Special case for -W as it must not swallow
1360 up any following argument. If this becomes common, add
1361 another field to the cl_options table. */
1362 if (arg[0] == '\0' && opt_code != OPT_W)
1367 cpp_fatal (pfile, cl_options[opt_index].msg, argv[i - 1]);
1375 case N_OPTS: /* Shut GCC up. */
1377 case OPT_fleading_underscore:
1378 CPP_OPTION (pfile, user_label_prefix) = "_";
1380 case OPT_fno_leading_underscore:
1381 CPP_OPTION (pfile, user_label_prefix) = "";
1383 case OPT_fno_operator_names:
1384 CPP_OPTION (pfile, operator_names) = 0;
1386 case OPT_fpreprocessed:
1387 CPP_OPTION (pfile, preprocessed) = 1;
1389 case OPT_fno_preprocessed:
1390 CPP_OPTION (pfile, preprocessed) = 0;
1392 case OPT_fshow_column:
1393 CPP_OPTION (pfile, show_column) = 1;
1395 case OPT_fno_show_column:
1396 CPP_OPTION (pfile, show_column) = 0;
1399 /* Silently ignore empty string, non-longs and silly values. */
1403 long tabstop = strtol (arg, &endptr, 10);
1404 if (*endptr == '\0' && tabstop >= 1 && tabstop <= 100)
1405 CPP_OPTION (pfile, tabstop) = tabstop;
1409 CPP_OPTION (pfile, inhibit_warnings) = 1;
1414 CPP_OPTION (pfile, help_only) = 1;
1416 case OPT_target__help:
1417 /* Print if any target specific options. cpplib has none, but
1418 make sure help_only gets set. */
1419 CPP_OPTION (pfile, help_only) = 1;
1422 /* --version inhibits compilation, -version doesn't. -v means
1423 verbose and -version. Historical reasons, don't ask. */
1425 CPP_OPTION (pfile, help_only) = 1;
1426 pfile->print_version = 1;
1429 CPP_OPTION (pfile, verbose) = 1;
1430 pfile->print_version = 1;
1433 pfile->print_version = 1;
1437 CPP_OPTION (pfile, discard_comments) = 0;
1440 CPP_OPTION (pfile, no_line_commands) = 1;
1442 case OPT_dollar: /* Don't include $ in identifiers. */
1443 CPP_OPTION (pfile, dollars_in_ident) = 0;
1446 CPP_OPTION (pfile, print_include_names) = 1;
1449 new_pending_directive (pend, arg, cpp_define);
1451 case OPT_pedantic_errors:
1452 CPP_OPTION (pfile, pedantic_errors) = 1;
1455 CPP_OPTION (pfile, pedantic) = 1;
1458 CPP_OPTION (pfile, trigraphs) = 1;
1461 CPP_OPTION (pfile, cplusplus) = 1;
1462 CPP_OPTION (pfile, cplusplus_comments) = 1;
1465 CPP_OPTION (pfile, remap) = 1;
1468 CPP_OPTION (pfile, include_prefix) = arg;
1469 CPP_OPTION (pfile, include_prefix_len) = strlen (arg);
1472 set_lang (pfile, CLK_GNUC89);
1474 case OPT_lang_cplusplus:
1475 set_lang (pfile, CLK_GNUCXX);
1478 set_lang (pfile, CLK_OBJC);
1480 case OPT_lang_objcplusplus:
1481 set_lang (pfile, CLK_OBJCXX);
1484 set_lang (pfile, CLK_ASM);
1486 case OPT_std_cplusplus98:
1487 set_lang (pfile, CLK_CXX98);
1490 set_lang (pfile, CLK_GNUC89);
1494 set_lang (pfile, CLK_GNUC99);
1496 case OPT_std_iso9899_199409:
1497 set_lang (pfile, CLK_STDC94);
1499 case OPT_std_iso9899_1990:
1502 set_lang (pfile, CLK_STDC89);
1504 case OPT_std_iso9899_199x:
1505 case OPT_std_iso9899_1999:
1508 set_lang (pfile, CLK_STDC99);
1511 /* -nostdinc causes no default include directories.
1512 You must specify all include-file directories with -I. */
1513 CPP_OPTION (pfile, no_standard_includes) = 1;
1515 case OPT_nostdincplusplus:
1516 /* -nostdinc++ causes no default C++-specific include directories. */
1517 CPP_OPTION (pfile, no_standard_cplusplus_includes) = 1;
1520 if (CPP_OPTION (pfile, out_fname) == NULL)
1521 CPP_OPTION (pfile, out_fname) = arg;
1524 cpp_fatal (pfile, "output filename specified twice");
1529 /* Args to -d specify what parts of macros to dump.
1530 Silently ignore unrecognised options; they may
1531 be aimed at the compiler proper. */
1535 while ((c = *arg++) != '\0')
1539 CPP_OPTION (pfile, dump_macros) = dump_only;
1540 CPP_OPTION (pfile, no_output) = 1;
1543 CPP_OPTION (pfile, dump_macros) = dump_names;
1546 CPP_OPTION (pfile, dump_macros) = dump_definitions;
1549 CPP_OPTION (pfile, dump_includes) = 1;
1556 CPP_OPTION (pfile, print_deps_missing_files) = 1;
1559 CPP_OPTION (pfile, print_deps) = 2;
1562 CPP_OPTION (pfile, print_deps) = 1;
1565 CPP_OPTION (pfile, deps_file) = arg;
1568 CPP_OPTION (pfile, deps_phony_targets) = 1;
1572 /* Add a target. -MQ quotes for Make. */
1573 deps_add_target (pfile->deps, arg, opt_code == OPT_MQ);
1576 /* -MD and -MMD for cpp0 are deprecated and undocumented
1577 (use -M or -MM with -MF instead), and probably should be
1578 removed with the next major GCC version. For the moment
1579 we allow these for the benefit of Automake 1.4, which
1580 uses these when dependency tracking is enabled. Automake
1581 1.5 will fix this. */
1583 CPP_OPTION (pfile, print_deps) = 2;
1584 CPP_OPTION (pfile, deps_file) = arg;
1587 CPP_OPTION (pfile, print_deps) = 1;
1588 CPP_OPTION (pfile, deps_file) = arg;
1594 /* -A with an argument beginning with '-' acts as
1595 #unassert on whatever immediately follows the '-'.
1596 If "-" is the whole argument, we eliminate all
1597 predefined macros and assertions, including those
1598 that were specified earlier on the command line.
1599 That way we can get rid of any that were passed
1600 automatically in from GCC. */
1604 free_chain (pend->directive_head);
1605 pend->directive_head = NULL;
1606 pend->directive_tail = NULL;
1609 new_pending_directive (pend, arg + 1, cpp_unassert);
1612 new_pending_directive (pend, arg, cpp_assert);
1615 new_pending_directive (pend, arg, cpp_undef);
1617 case OPT_I: /* Add directory to path for includes. */
1618 if (!strcmp (arg, "-"))
1621 Use the preceding -I directories for #include "..."
1622 but not #include <...>.
1623 Don't search the directory of the present file
1624 for #include "...". (Note that -I. -I- is not the same as
1625 the default setup; -I. uses the compiler's working dir.) */
1626 if (! CPP_OPTION (pfile, ignore_srcdir))
1628 pend->quote_head = pend->brack_head;
1629 pend->quote_tail = pend->brack_tail;
1630 pend->brack_head = 0;
1631 pend->brack_tail = 0;
1632 CPP_OPTION (pfile, ignore_srcdir) = 1;
1636 cpp_fatal (pfile, "-I- specified twice");
1641 append_include_chain (pfile, xstrdup (arg), BRACKET, 0);
1644 /* Add directory to beginning of system include path, as a system
1645 include directory. */
1646 append_include_chain (pfile, xstrdup (arg), SYSTEM, 0);
1651 struct pending_option *o = (struct pending_option *)
1652 xmalloc (sizeof (struct pending_option));
1656 if (opt_code == OPT_include)
1657 APPEND (pend, include, o);
1659 APPEND (pend, imacros, o);
1662 case OPT_iwithprefix:
1663 /* Add directory to end of path for includes,
1664 with the default prefix at the front of its name. */
1666 case OPT_iwithprefixbefore:
1667 /* Add directory to main path for includes,
1668 with the default prefix at the front of its name. */
1675 if (CPP_OPTION (pfile, include_prefix) != 0)
1677 size_t ipl = CPP_OPTION (pfile, include_prefix_len);
1678 fname = xmalloc (ipl + len + 1);
1679 memcpy (fname, CPP_OPTION (pfile, include_prefix), ipl);
1680 memcpy (fname + ipl, arg, len + 1);
1682 else if (cpp_GCC_INCLUDE_DIR_len)
1684 fname = xmalloc (cpp_GCC_INCLUDE_DIR_len + len + 1);
1685 memcpy (fname, cpp_GCC_INCLUDE_DIR, cpp_GCC_INCLUDE_DIR_len);
1686 memcpy (fname + cpp_GCC_INCLUDE_DIR_len, arg, len + 1);
1689 fname = xstrdup (arg);
1691 append_include_chain (pfile, fname,
1692 opt_code == OPT_iwithprefix ? SYSTEM: BRACKET, 0);
1696 /* Add directory to end of path for includes. */
1697 append_include_chain (pfile, xstrdup (arg), AFTER, 0);
1700 /* Silently ignore unrecognised options. */
1701 if (!strcmp (argv[i], "-Wall"))
1703 CPP_OPTION (pfile, warn_trigraphs) = 1;
1704 CPP_OPTION (pfile, warn_comments) = 1;
1706 else if (!strcmp (argv[i], "-Wtraditional"))
1707 CPP_OPTION (pfile, warn_traditional) = 1;
1708 else if (!strcmp (argv[i], "-Wtrigraphs"))
1709 CPP_OPTION (pfile, warn_trigraphs) = 1;
1710 else if (!strcmp (argv[i], "-Wcomment"))
1711 CPP_OPTION (pfile, warn_comments) = 1;
1712 else if (!strcmp (argv[i], "-Wcomments"))
1713 CPP_OPTION (pfile, warn_comments) = 1;
1714 else if (!strcmp (argv[i], "-Wundef"))
1715 CPP_OPTION (pfile, warn_undef) = 1;
1716 else if (!strcmp (argv[i], "-Wimport"))
1717 CPP_OPTION (pfile, warn_import) = 1;
1718 else if (!strcmp (argv[i], "-Werror"))
1719 CPP_OPTION (pfile, warnings_are_errors) = 1;
1720 else if (!strcmp (argv[i], "-Wsystem-headers"))
1721 CPP_OPTION (pfile, warn_system_headers) = 1;
1722 else if (!strcmp (argv[i], "-Wno-traditional"))
1723 CPP_OPTION (pfile, warn_traditional) = 0;
1724 else if (!strcmp (argv[i], "-Wno-trigraphs"))
1725 CPP_OPTION (pfile, warn_trigraphs) = 0;
1726 else if (!strcmp (argv[i], "-Wno-comment"))
1727 CPP_OPTION (pfile, warn_comments) = 0;
1728 else if (!strcmp (argv[i], "-Wno-comments"))
1729 CPP_OPTION (pfile, warn_comments) = 0;
1730 else if (!strcmp (argv[i], "-Wno-undef"))
1731 CPP_OPTION (pfile, warn_undef) = 0;
1732 else if (!strcmp (argv[i], "-Wno-import"))
1733 CPP_OPTION (pfile, warn_import) = 0;
1734 else if (!strcmp (argv[i], "-Wno-error"))
1735 CPP_OPTION (pfile, warnings_are_errors) = 0;
1736 else if (!strcmp (argv[i], "-Wno-system-headers"))
1737 CPP_OPTION (pfile, warn_system_headers) = 0;
1746 /* Handle command-line options in (argc, argv).
1747 Can be called multiple times, to handle multiple sets of options.
1748 Returns if an unrecognized option is seen.
1749 Returns number of strings consumed. */
1751 cpp_handle_options (pfile, argc, argv)
1757 int strings_processed;
1759 for (i = 0; i < argc; i += strings_processed)
1761 strings_processed = cpp_handle_option (pfile, argc - i, argv + i, 1);
1762 if (strings_processed == 0)
1769 /* Extra processing when all options are parsed, after all calls to
1770 cpp_handle_option[s]. Consistency checks etc. */
1772 cpp_post_options (pfile)
1775 if (pfile->print_version)
1777 fprintf (stderr, _("GNU CPP version %s (cpplib)"), version_string);
1778 #ifdef TARGET_VERSION
1781 fputc ('\n', stderr);
1784 /* Canonicalize in_fname and out_fname. We guarantee they are not
1785 NULL, and that the empty string represents stdin / stdout. */
1786 if (CPP_OPTION (pfile, in_fname) == NULL
1787 || !strcmp (CPP_OPTION (pfile, in_fname), "-"))
1788 CPP_OPTION (pfile, in_fname) = "";
1790 if (CPP_OPTION (pfile, out_fname) == NULL
1791 || !strcmp (CPP_OPTION (pfile, out_fname), "-"))
1792 CPP_OPTION (pfile, out_fname) = "";
1794 /* -Wtraditional is not useful in C++ mode. */
1795 if (CPP_OPTION (pfile, cplusplus))
1796 CPP_OPTION (pfile, warn_traditional) = 0;
1798 /* Set this if it hasn't been set already. */
1799 if (CPP_OPTION (pfile, user_label_prefix) == NULL)
1800 CPP_OPTION (pfile, user_label_prefix) = USER_LABEL_PREFIX;
1802 /* Permanently disable macro expansion if we are rescanning
1803 preprocessed text. */
1804 if (CPP_OPTION (pfile, preprocessed))
1805 pfile->state.prevent_expansion = 1;
1807 /* We need to do this after option processing and before
1808 cpp_start_read, as cppmain.c relies on the options->no_output to
1809 set its callbacks correctly before calling cpp_start_read. */
1810 init_dependency_output (pfile);
1812 /* After checking the environment variables, check if -M or -MM has
1813 not been specified, but other -M options have. */
1814 if (CPP_OPTION (pfile, print_deps) == 0 &&
1815 (CPP_OPTION (pfile, print_deps_missing_files)
1816 || CPP_OPTION (pfile, deps_file)
1817 || CPP_OPTION (pfile, deps_phony_targets)))
1818 cpp_fatal (pfile, "you must additionally specify either -M or -MM");
1821 /* Set up dependency-file output. */
1823 init_dependency_output (pfile)
1826 char *spec, *s, *output_file;
1828 /* Either of two environment variables can specify output of deps.
1829 Its value is either "OUTPUT_FILE" or "OUTPUT_FILE DEPS_TARGET",
1830 where OUTPUT_FILE is the file to write deps info to
1831 and DEPS_TARGET is the target to mention in the deps. */
1833 if (CPP_OPTION (pfile, print_deps) == 0)
1835 spec = getenv ("DEPENDENCIES_OUTPUT");
1837 CPP_OPTION (pfile, print_deps) = 1;
1840 spec = getenv ("SUNPRO_DEPENDENCIES");
1842 CPP_OPTION (pfile, print_deps) = 2;
1847 /* Find the space before the DEPS_TARGET, if there is one. */
1848 s = strchr (spec, ' ');
1851 /* Let the caller perform MAKE quoting. */
1852 deps_add_target (pfile->deps, s + 1, 0);
1853 output_file = (char *) xmalloc (s - spec + 1);
1854 memcpy (output_file, spec, s - spec);
1855 output_file[s - spec] = 0;
1860 /* Command line overrides environment variables. */
1861 if (CPP_OPTION (pfile, deps_file) == 0)
1862 CPP_OPTION (pfile, deps_file) = output_file;
1863 CPP_OPTION (pfile, print_deps_append) = 1;
1866 /* If dependencies go to standard output, or -MG is used, we should
1867 suppress output, including -dM, -dI etc. */
1868 if (CPP_OPTION (pfile, deps_file) == 0
1869 || CPP_OPTION (pfile, print_deps_missing_files))
1871 CPP_OPTION (pfile, no_output) = 1;
1872 CPP_OPTION (pfile, dump_macros) = 0;
1873 CPP_OPTION (pfile, dump_includes) = 0;
1877 /* Handle --help output. */
1881 fprintf (stderr, _("Usage: %s [switches] input output\n"), progname);
1882 /* To keep the lines from getting too long for some compilers, limit
1883 to about 500 characters (6 lines) per chunk. */
1886 -include <file> Include the contents of <file> before other files\n\
1887 -imacros <file> Accept definition of macros in <file>\n\
1888 -iprefix <path> Specify <path> as a prefix for next two options\n\
1889 -iwithprefix <dir> Add <dir> to the end of the system include path\n\
1890 -iwithprefixbefore <dir> Add <dir> to the end of the main include path\n\
1891 -isystem <dir> Add <dir> to the start of the system include path\n\
1894 -idirafter <dir> Add <dir> to the end of the system include path\n\
1895 -I <dir> Add <dir> to the end of the main include path\n\
1896 -I- Fine-grained include path control; see info docs\n\
1897 -nostdinc Do not search system include directories\n\
1898 (dirs specified with -isystem will still be used)\n\
1899 -nostdinc++ Do not search system include directories for C++\n\
1900 -o <file> Put output into <file>\n\
1903 -pedantic Issue all warnings demanded by strict ISO C\n\
1904 -pedantic-errors Issue -pedantic warnings as errors instead\n\
1905 -trigraphs Support ISO C trigraphs\n\
1906 -lang-c Assume that the input sources are in C\n\
1907 -lang-c89 Assume that the input sources are in C89\n\
1910 -lang-c++ Assume that the input sources are in C++\n\
1911 -lang-objc Assume that the input sources are in ObjectiveC\n\
1912 -lang-objc++ Assume that the input sources are in ObjectiveC++\n\
1913 -lang-asm Assume that the input sources are in assembler\n\
1916 -std=<std name> Specify the conformance standard; one of:\n\
1917 gnu89, gnu99, c89, c99, iso9899:1990,\n\
1918 iso9899:199409, iso9899:1999\n\
1919 -+ Allow parsing of C++ style features\n\
1920 -w Inhibit warning messages\n\
1921 -Wtrigraphs Warn if trigraphs are encountered\n\
1922 -Wno-trigraphs Do not warn about trigraphs\n\
1923 -Wcomment{s} Warn if one comment starts inside another\n\
1926 -Wno-comment{s} Do not warn about comments\n\
1927 -Wtraditional Warn about features not present in traditional C\n\
1928 -Wno-traditional Do not warn about traditional C\n\
1929 -Wundef Warn if an undefined macro is used by #if\n\
1930 -Wno-undef Do not warn about testing undefined macros\n\
1931 -Wimport Warn about the use of the #import directive\n\
1934 -Wno-import Do not warn about the use of #import\n\
1935 -Werror Treat all warnings as errors\n\
1936 -Wno-error Do not treat warnings as errors\n\
1937 -Wsystem-headers Do not suppress warnings from system headers\n\
1938 -Wno-system-headers Suppress warnings from system headers\n\
1939 -Wall Enable all preprocessor warnings\n\
1942 -M Generate make dependencies\n\
1943 -MM As -M, but ignore system header files\n\
1944 -MF <file> Write dependency output to the given file\n\
1945 -MG Treat missing header file as generated files\n\
1948 -MP Generate phony targets for all headers\n\
1949 -MQ <target> Add a MAKE-quoted target\n\
1950 -MT <target> Add an unquoted target\n\
1953 -D<macro> Define a <macro> with string '1' as its value\n\
1954 -D<macro>=<val> Define a <macro> with <val> as its value\n\
1955 -A<question> (<answer>) Assert the <answer> to <question>\n\
1956 -A-<question> (<answer>) Disable the <answer> to <question>\n\
1957 -U<macro> Undefine <macro> \n\
1958 -v Display the version number\n\
1961 -H Print the name of header files as they are used\n\
1962 -C Do not discard comments\n\
1963 -dM Display a list of macro definitions active at end\n\
1964 -dD Preserve macro definitions in output\n\
1965 -dN As -dD except that only the names are preserved\n\
1966 -dI Include #include directives in the output\n\
1969 -fpreprocessed Treat the input file as already preprocessed\n\
1970 -ftabstop=<number> Distance between tab stops for column reporting\n\
1971 -P Do not generate #line directives\n\
1972 -$ Do not allow '$' in identifiers\n\
1973 -remap Remap file names when including files.\n\
1974 --version Display version information\n\
1975 -h or --help Display this information\n\