2 Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001 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. */
31 #include "cppdefault.h"
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)))
45 # if (defined _WIN32 && ! defined (_UWIN)) || defined __MSDOS__
46 # define INO_T_EQ(a, b) 0
48 # define INO_T_EQ(a, b) ((a) == (b))
52 /* Internal structures and prototypes. */
54 /* A `struct pending_option' remembers one -D, -A, -U, -include, or
57 typedef void (* cl_directive_handler
) PARAMS ((cpp_reader
*, const char *));
60 struct pending_option
*next
;
62 cl_directive_handler handler
;
65 /* The `pending' structure accumulates all the options that are not
66 actually processed until we hit cpp_start_read. It consists of
67 several lists, one for each type of option. We keep both head and
68 tail pointers for quick insertion. */
71 struct pending_option
*directive_head
, *directive_tail
;
73 struct search_path
*quote_head
, *quote_tail
;
74 struct search_path
*brack_head
, *brack_tail
;
75 struct search_path
*systm_head
, *systm_tail
;
76 struct search_path
*after_head
, *after_tail
;
78 struct pending_option
*imacros_head
, *imacros_tail
;
79 struct pending_option
*include_head
, *include_tail
;
83 #define APPEND(pend, list, elt) \
84 do { if (!(pend)->list##_head) (pend)->list##_head = (elt); \
85 else (pend)->list##_tail->next = (elt); \
86 (pend)->list##_tail = (elt); \
89 #define APPEND(pend, list, elt) \
90 do { if (!(pend)->list/**/_head) (pend)->list/**/_head = (elt); \
91 else (pend)->list/**/_tail->next = (elt); \
92 (pend)->list/**/_tail = (elt); \
96 static void print_help
PARAMS ((void));
97 static void path_include
PARAMS ((cpp_reader
*,
99 static void init_library
PARAMS ((void));
100 static void init_builtins
PARAMS ((cpp_reader
*));
101 static void append_include_chain
PARAMS ((cpp_reader
*,
103 static struct search_path
* remove_dup_dir
PARAMS ((cpp_reader
*,
104 struct search_path
*));
105 static struct search_path
* remove_dup_dirs
PARAMS ((cpp_reader
*,
106 struct search_path
*));
107 static void merge_include_chains
PARAMS ((cpp_reader
*));
108 static bool push_include
PARAMS ((cpp_reader
*,
109 struct pending_option
*));
110 static void free_chain
PARAMS ((struct pending_option
*));
111 static void set_lang
PARAMS ((cpp_reader
*, enum c_lang
));
112 static void init_dependency_output
PARAMS ((cpp_reader
*));
113 static void init_standard_includes
PARAMS ((cpp_reader
*));
114 static void new_pending_directive
PARAMS ((struct cpp_pending
*,
116 cl_directive_handler
));
117 static void output_deps
PARAMS ((cpp_reader
*));
118 static int parse_option
PARAMS ((const char *));
120 /* Fourth argument to append_include_chain: chain to use.
121 Note it's never asked to append to the quote chain. */
122 enum { BRACKET
= 0, SYSTEM
, AFTER
};
124 /* If we have designated initializers (GCC >2.7) these tables can be
125 initialized, constant data. Otherwise, they have to be filled in at
127 #if HAVE_DESIGNATED_INITIALIZERS
129 #define init_trigraph_map() /* Nothing. */
130 #define TRIGRAPH_MAP \
131 __extension__ const U_CHAR _cpp_trigraph_map[UCHAR_MAX + 1] = {
134 #define s(p, v) [p] = v,
138 #define TRIGRAPH_MAP U_CHAR _cpp_trigraph_map[UCHAR_MAX + 1] = { 0 }; \
139 static void init_trigraph_map PARAMS ((void)) { \
140 unsigned char *x = _cpp_trigraph_map;
143 #define s(p, v) x[p] = v;
148 s('=', '#') s(')', ']') s('!', '|')
149 s('(', '[') s('\'', '^') s('>', '}')
150 s('/', '\\') s('<', '{') s('-', '~')
157 /* Given a colon-separated list of file names PATH,
158 add all the names to the search path for include files. */
161 path_include (pfile
, list
, path
)
172 /* Find the end of this name. */
174 while (*q
!= 0 && *q
!= PATH_SEPARATOR
) q
++;
177 /* An empty name in the path stands for the current directory. */
178 name
= (char *) xmalloc (2);
184 /* Otherwise use the directory that is named. */
185 name
= (char *) xmalloc (q
- p
+ 1);
186 memcpy (name
, p
, q
- p
);
190 append_include_chain (pfile
, name
, path
, 0);
192 /* Advance past this name. */
200 /* Append DIR to include path PATH. DIR must be allocated on the
201 heap; this routine takes responsibility for freeing it. */
203 append_include_chain (pfile
, dir
, path
, cxx_aware
)
207 int cxx_aware ATTRIBUTE_UNUSED
;
209 struct cpp_pending
*pend
= CPP_OPTION (pfile
, pending
);
210 struct search_path
*new;
219 _cpp_simplify_pathname (dir
);
223 /* Dirs that don't exist are silently ignored. */
225 cpp_notice_from_errno (pfile
, dir
);
226 else if (CPP_OPTION (pfile
, verbose
))
227 fprintf (stderr
, _("ignoring nonexistent directory \"%s\"\n"), dir
);
232 if (!S_ISDIR (st
.st_mode
))
234 cpp_notice (pfile
, "%s: Not a directory", dir
);
240 if (len
> pfile
->max_include_len
)
241 pfile
->max_include_len
= len
;
243 new = (struct search_path
*) xmalloc (sizeof (struct search_path
));
246 new->ino
= st
.st_ino
;
247 new->dev
= st
.st_dev
;
248 /* Both systm and after include file lists should be treated as system
249 include files since these two lists are really just a concatenation
250 of one "system" list. */
251 if (path
== SYSTEM
|| path
== AFTER
)
252 #ifdef NO_IMPLICIT_EXTERN_C
255 new->sysp
= cxx_aware
? 1 : 2;
259 new->name_map
= NULL
;
264 case BRACKET
: APPEND (pend
, brack
, new); break;
265 case SYSTEM
: APPEND (pend
, systm
, new); break;
266 case AFTER
: APPEND (pend
, after
, new); break;
270 /* Handle a duplicated include path. PREV is the link in the chain
271 before the duplicate. The duplicate is removed from the chain and
272 freed. Returns PREV. */
273 static struct search_path
*
274 remove_dup_dir (pfile
, prev
)
276 struct search_path
*prev
;
278 struct search_path
*cur
= prev
->next
;
280 if (CPP_OPTION (pfile
, verbose
))
281 fprintf (stderr
, _("ignoring duplicate directory \"%s\"\n"), cur
->name
);
283 prev
->next
= cur
->next
;
284 free ((PTR
) cur
->name
);
290 /* Remove duplicate directories from a chain. Returns the tail of the
291 chain, or NULL if the chain is empty. This algorithm is quadratic
292 in the number of -I switches, which is acceptable since there
293 aren't usually that many of them. */
294 static struct search_path
*
295 remove_dup_dirs (pfile
, head
)
297 struct search_path
*head
;
299 struct search_path
*prev
= NULL
, *cur
, *other
;
301 for (cur
= head
; cur
; cur
= cur
->next
)
303 for (other
= head
; other
!= cur
; other
= other
->next
)
304 if (INO_T_EQ (cur
->ino
, other
->ino
) && cur
->dev
== other
->dev
)
306 if (cur
->sysp
&& !other
->sysp
)
309 "changing search order for system directory \"%s\"",
311 if (strcmp (cur
->name
, other
->name
))
313 " as it is the same as non-system directory \"%s\"",
317 " as it has already been specified as a non-system directory");
319 cur
= remove_dup_dir (pfile
, prev
);
328 /* Merge the four include chains together in the order quote, bracket,
329 system, after. Remove duplicate dirs (as determined by
330 INO_T_EQ()). The system_include and after_include chains are never
331 referred to again after this function; all access is through the
332 bracket_include path.
334 For the future: Check if the directory is empty (but
335 how?) and possibly preload the include hash. */
338 merge_include_chains (pfile
)
341 struct search_path
*quote
, *brack
, *systm
, *qtail
;
343 struct cpp_pending
*pend
= CPP_OPTION (pfile
, pending
);
345 quote
= pend
->quote_head
;
346 brack
= pend
->brack_head
;
347 systm
= pend
->systm_head
;
348 qtail
= pend
->quote_tail
;
350 /* Paste together bracket, system, and after include chains. */
352 pend
->systm_tail
->next
= pend
->after_head
;
354 systm
= pend
->after_head
;
357 pend
->brack_tail
->next
= systm
;
361 /* This is a bit tricky. First we drop dupes from the quote-include
362 list. Then we drop dupes from the bracket-include list.
363 Finally, if qtail and brack are the same directory, we cut out
364 brack and move brack up to point to qtail.
366 We can't just merge the lists and then uniquify them because
367 then we may lose directories from the <> search path that should
368 be there; consider -Ifoo -Ibar -I- -Ifoo -Iquux. It is however
369 safe to treat -Ibar -Ifoo -I- -Ifoo -Iquux as if written
370 -Ibar -I- -Ifoo -Iquux. */
372 remove_dup_dirs (pfile
, brack
);
373 qtail
= remove_dup_dirs (pfile
, quote
);
379 /* If brack == qtail, remove brack as it's simpler. */
380 if (INO_T_EQ (qtail
->ino
, brack
->ino
) && 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 /* Sets internal flags correctly for a given language, and defines
391 macros if necessary. */
398 char extended_numbers
;
400 char dollars_in_ident
;
401 char cplusplus_comments
;
405 /* ??? Enable $ in identifiers in assembly? */
406 static const struct lang_flags lang_defaults
[] =
407 { /* c99 objc c++ xnum trig dollar c++comm digr */
408 /* GNUC89 */ { 0, 0, 0, 1, 0, 1, 1, 1 },
409 /* GNUC99 */ { 1, 0, 0, 1, 0, 1, 1, 1 },
410 /* STDC89 */ { 0, 0, 0, 0, 1, 0, 0, 0 },
411 /* STDC94 */ { 0, 0, 0, 0, 1, 0, 0, 1 },
412 /* STDC99 */ { 1, 0, 0, 1, 1, 0, 1, 1 },
413 /* GNUCXX */ { 0, 0, 1, 1, 0, 1, 1, 1 },
414 /* CXX98 */ { 0, 0, 1, 1, 1, 0, 1, 1 },
415 /* OBJC */ { 0, 1, 0, 1, 0, 1, 1, 1 },
416 /* OBJCXX */ { 0, 1, 1, 1, 0, 1, 1, 1 },
417 /* ASM */ { 0, 0, 0, 1, 0, 0, 1, 0 }
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. */
458 static int initialized
= 0;
465 /* For non-ASCII hosts, the cl_options array needs to be sorted at
467 qsort (cl_options
, N_OPTS
, sizeof (struct cl_option
), opt_comp
);
470 /* Set up the trigraph map. This doesn't need to do anything if
471 we were compiled with a compiler that supports C99 designated
473 init_trigraph_map ();
477 /* Initialize a cpp_reader structure. */
479 cpp_create_reader (table
, lang
)
483 struct spec_nodes
*s
;
486 /* Initialise this instance of the library if it hasn't been already. */
489 pfile
= (cpp_reader
*) xcalloc (1, sizeof (cpp_reader
));
491 set_lang (pfile
, lang
);
492 CPP_OPTION (pfile
, warn_import
) = 1;
493 CPP_OPTION (pfile
, discard_comments
) = 1;
494 CPP_OPTION (pfile
, show_column
) = 1;
495 CPP_OPTION (pfile
, tabstop
) = 8;
496 CPP_OPTION (pfile
, operator_names
) = 1;
498 CPP_OPTION (pfile
, pending
) =
499 (struct cpp_pending
*) xcalloc (1, sizeof (struct cpp_pending
));
501 /* It's simplest to just create this struct whether or not it will
503 pfile
->deps
= deps_init ();
505 /* Initialise the line map. */
506 init_line_maps (&pfile
->line_maps
);
508 /* Initialize lexer state. */
509 pfile
->state
.save_comments
= ! CPP_OPTION (pfile
, discard_comments
);
511 /* Indicate date and time not yet calculated. */
512 pfile
->date
.type
= CPP_EOF
;
514 /* Initialise the base context. */
515 pfile
->context
= &pfile
->base_context
;
516 pfile
->base_context
.macro
= 0;
517 pfile
->base_context
.prev
= pfile
->base_context
.next
= 0;
519 /* Identifier pool initially 8K. Unaligned, permanent pool. */
520 _cpp_init_pool (&pfile
->ident_pool
, 8 * 1024, 1, 0);
522 /* Argument pool initially 8K. Aligned, temporary pool. */
523 _cpp_init_pool (&pfile
->argument_pool
, 8 * 1024, 0, 1);
525 /* Macro pool initially 8K. Aligned, permanent pool. */
526 _cpp_init_pool (&pfile
->macro_pool
, 8 * 1024, 0, 0);
528 /* Initialise the buffer obstack. */
529 gcc_obstack_init (&pfile
->buffer_ob
);
531 /* Initialise the hashtable. */
532 _cpp_init_hashtable (pfile
, table
);
534 _cpp_init_directives (pfile
);
535 _cpp_init_includes (pfile
);
536 _cpp_init_internal_pragmas (pfile
);
538 /* Initialize the special nodes. */
539 s
= &pfile
->spec_nodes
;
540 s
->n_L
= cpp_lookup (pfile
, DSC("L"));
541 s
->n_defined
= cpp_lookup (pfile
, DSC("defined"));
542 s
->n_true
= cpp_lookup (pfile
, DSC("true"));
543 s
->n_false
= cpp_lookup (pfile
, DSC("false"));
544 s
->n__Pragma
= cpp_lookup (pfile
, DSC("_Pragma"));
545 s
->n__STRICT_ANSI__
= cpp_lookup (pfile
, DSC("__STRICT_ANSI__"));
546 s
->n__CHAR_UNSIGNED__
= cpp_lookup (pfile
, DSC("__CHAR_UNSIGNED__"));
547 s
->n__VA_ARGS__
= cpp_lookup (pfile
, DSC("__VA_ARGS__"));
548 s
->n__VA_ARGS__
->flags
|= NODE_DIAGNOSTIC
;
553 /* Free resources used by PFILE. Accessing PFILE after this function
554 returns leads to undefined behaviour. */
560 struct search_path
*dir
, *dirn
;
561 cpp_context
*context
, *contextn
;
563 while (CPP_BUFFER (pfile
) != NULL
)
564 _cpp_pop_buffer (pfile
);
566 if (pfile
->macro_buffer
)
568 free ((PTR
) pfile
->macro_buffer
);
569 pfile
->macro_buffer
= NULL
;
570 pfile
->macro_buffer_len
= 0;
573 deps_free (pfile
->deps
);
574 obstack_free (&pfile
->buffer_ob
, 0);
576 _cpp_destroy_hashtable (pfile
);
577 _cpp_cleanup_includes (pfile
);
578 _cpp_free_lookaheads (pfile
);
580 _cpp_free_pool (&pfile
->ident_pool
);
581 _cpp_free_pool (&pfile
->macro_pool
);
582 _cpp_free_pool (&pfile
->argument_pool
);
584 for (dir
= CPP_OPTION (pfile
, quote_include
); dir
; dir
= dirn
)
587 free ((PTR
) dir
->name
);
591 for (context
= pfile
->base_context
.next
; context
; context
= contextn
)
593 contextn
= context
->next
;
597 free_line_maps (&pfile
->line_maps
);
599 result
= pfile
->errors
;
606 /* This structure defines one built-in identifier. A node will be
607 entered in the hash table under the name NAME, with value VALUE (if
608 any). If flags has OPERATOR, the node's operator field is used; if
609 flags has BUILTIN the node's builtin field is used. Macros that are
610 known at build time should not be flagged BUILTIN, as then they do
611 not appear in macro dumps with e.g. -dM or -dD.
613 Two values are not compile time constants, so we tag
614 them in the FLAGS field instead:
615 VERS value is the global version_string, quoted
616 ULP value is the global user_label_prefix
618 Also, macros with CPLUS set in the flags field are entered only for C++. */
624 unsigned char builtin
;
625 unsigned char operator;
626 unsigned short flags
;
633 #define OPERATOR 0x10
635 #define B(n, t) { U n, 0, t, 0, BUILTIN, sizeof n - 1 }
636 #define C(n, v) { U n, v, 0, 0, 0, sizeof n - 1 }
637 #define X(n, f) { U n, 0, 0, 0, f, sizeof n - 1 }
638 #define O(n, c, f) { U n, 0, 0, c, OPERATOR | f, sizeof n - 1 }
639 static const struct builtin builtin_array
[] =
641 B("__TIME__", BT_TIME
),
642 B("__DATE__", BT_DATE
),
643 B("__FILE__", BT_FILE
),
644 B("__BASE_FILE__", BT_BASE_FILE
),
645 B("__LINE__", BT_SPECLINE
),
646 B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL
),
648 X("__VERSION__", VERS
),
649 X("__USER_LABEL_PREFIX__", ULP
),
650 C("__REGISTER_PREFIX__", REGISTER_PREFIX
),
651 C("__HAVE_BUILTIN_SETJMP__", "1"),
652 #ifndef NO_BUILTIN_SIZE_TYPE
653 C("__SIZE_TYPE__", SIZE_TYPE
),
655 #ifndef NO_BUILTIN_PTRDIFF_TYPE
656 C("__PTRDIFF_TYPE__", PTRDIFF_TYPE
),
658 #ifndef NO_BUILTIN_WCHAR_TYPE
659 C("__WCHAR_TYPE__", WCHAR_TYPE
),
661 #ifndef NO_BUILTIN_WINT_TYPE
662 C("__WINT_TYPE__", WINT_TYPE
),
664 #ifdef STDC_0_IN_SYSTEM_HEADERS
665 B("__STDC__", BT_STDC
),
670 /* Named operators known to the preprocessor. These cannot be #defined
671 and always have their stated meaning. They are treated like normal
672 identifiers except for the type code and the meaning. Most of them
673 are only for C++ (but see iso646.h). */
674 O("and", CPP_AND_AND
, CPLUS
),
675 O("and_eq", CPP_AND_EQ
, CPLUS
),
676 O("bitand", CPP_AND
, CPLUS
),
677 O("bitor", CPP_OR
, CPLUS
),
678 O("compl", CPP_COMPL
, CPLUS
),
679 O("not", CPP_NOT
, CPLUS
),
680 O("not_eq", CPP_NOT_EQ
, CPLUS
),
681 O("or", CPP_OR_OR
, CPLUS
),
682 O("or_eq", CPP_OR_EQ
, CPLUS
),
683 O("xor", CPP_XOR
, CPLUS
),
684 O("xor_eq", CPP_XOR_EQ
, CPLUS
)
690 #define builtin_array_end \
691 builtin_array + sizeof(builtin_array)/sizeof(struct builtin)
693 /* Subroutine of cpp_start_read; reads the builtins table above and
694 enters the macros into the hash table. */
696 init_builtins (pfile
)
699 const struct builtin
*b
;
701 for(b
= builtin_array
; b
< builtin_array_end
; b
++)
703 if ((b
->flags
& CPLUS
) && ! CPP_OPTION (pfile
, cplusplus
))
706 if ((b
->flags
& OPERATOR
) && ! CPP_OPTION (pfile
, operator_names
))
709 if (b
->flags
& (OPERATOR
| BUILTIN
))
711 cpp_hashnode
*hp
= cpp_lookup (pfile
, b
->name
, b
->len
);
712 if (b
->flags
& OPERATOR
)
714 hp
->flags
|= NODE_OPERATOR
;
715 hp
->value
.operator = b
->operator;
720 hp
->flags
|= NODE_BUILTIN
| NODE_WARN
;
721 hp
->value
.builtin
= b
->builtin
;
724 else /* A standard macro of some kind. */
731 /* Allocate enough space for 'name "value"\n\0'. */
732 str
= alloca (b
->len
+ strlen (version_string
) + 5);
733 sprintf (str
, "%s \"%s\"\n", b
->name
, version_string
);
738 val
= CPP_OPTION (pfile
, user_label_prefix
);
742 /* Allocate enough space for "name value\n\0". */
743 str
= alloca (b
->len
+ strlen (val
) + 3);
744 sprintf(str
, "%s %s\n", b
->name
, val
);
747 _cpp_define_builtin (pfile
, str
);
751 if (CPP_OPTION (pfile
, cplusplus
))
753 _cpp_define_builtin (pfile
, "__cplusplus 1");
754 if (SUPPORTS_ONE_ONLY
)
755 _cpp_define_builtin (pfile
, "__GXX_WEAK__ 1");
757 _cpp_define_builtin (pfile
, "__GXX_WEAK__ 0");
759 if (CPP_OPTION (pfile
, objc
))
760 _cpp_define_builtin (pfile
, "__OBJC__ 1");
762 if (CPP_OPTION (pfile
, lang
) == CLK_STDC94
)
763 _cpp_define_builtin (pfile
, "__STDC_VERSION__ 199409L");
764 else if (CPP_OPTION (pfile
, c99
))
765 _cpp_define_builtin (pfile
, "__STDC_VERSION__ 199901L");
767 if (CPP_OPTION (pfile
, lang
) == CLK_STDC89
768 || CPP_OPTION (pfile
, lang
) == CLK_STDC94
769 || CPP_OPTION (pfile
, lang
) == CLK_STDC99
)
770 _cpp_define_builtin (pfile
, "__STRICT_ANSI__ 1");
771 else if (CPP_OPTION (pfile
, lang
) == CLK_ASM
)
772 _cpp_define_builtin (pfile
, "__ASSEMBLER__ 1");
779 #undef builtin_array_end
781 /* And another subroutine. This one sets up the standard include path. */
783 init_standard_includes (pfile
)
787 const struct default_include
*p
;
788 const char *specd_prefix
= CPP_OPTION (pfile
, include_prefix
);
790 /* Several environment variables may add to the include search path.
791 CPATH specifies an additional list of directories to be searched
792 as if specified with -I, while C_INCLUDE_PATH, CPLUS_INCLUDE_PATH,
793 etc. specify an additional list of directories to be searched as
794 if specified with -isystem, for the language indicated. */
796 GET_ENV_PATH_LIST (path
, "CPATH");
797 if (path
!= 0 && *path
!= 0)
798 path_include (pfile
, path
, BRACKET
);
800 switch ((CPP_OPTION (pfile
, objc
) << 1) + CPP_OPTION (pfile
, cplusplus
))
803 GET_ENV_PATH_LIST (path
, "C_INCLUDE_PATH");
806 GET_ENV_PATH_LIST (path
, "CPLUS_INCLUDE_PATH");
809 GET_ENV_PATH_LIST (path
, "OBJC_INCLUDE_PATH");
812 GET_ENV_PATH_LIST (path
, "OBJCPLUS_INCLUDE_PATH");
815 if (path
!= 0 && *path
!= 0)
816 path_include (pfile
, path
, SYSTEM
);
818 /* Search "translated" versions of GNU directories.
819 These have /usr/local/lib/gcc... replaced by specd_prefix. */
820 if (specd_prefix
!= 0 && cpp_GCC_INCLUDE_DIR_len
)
822 /* Remove the `include' from /usr/local/lib/gcc.../include.
823 GCC_INCLUDE_DIR will always end in /include. */
824 int default_len
= cpp_GCC_INCLUDE_DIR_len
;
825 char *default_prefix
= (char *) alloca (default_len
+ 1);
826 int specd_len
= strlen (specd_prefix
);
828 memcpy (default_prefix
, cpp_GCC_INCLUDE_DIR
, default_len
);
829 default_prefix
[default_len
] = '\0';
831 for (p
= cpp_include_defaults
; p
->fname
; p
++)
833 /* Some standard dirs are only for C++. */
835 || (CPP_OPTION (pfile
, cplusplus
)
836 && !CPP_OPTION (pfile
, no_standard_cplusplus_includes
)))
838 /* Does this dir start with the prefix? */
839 if (!memcmp (p
->fname
, default_prefix
, default_len
))
841 /* Yes; change prefix and add to search list. */
842 int flen
= strlen (p
->fname
);
843 int this_len
= specd_len
+ flen
- default_len
;
844 char *str
= (char *) xmalloc (this_len
+ 1);
845 memcpy (str
, specd_prefix
, specd_len
);
846 memcpy (str
+ specd_len
,
847 p
->fname
+ default_len
,
848 flen
- default_len
+ 1);
850 append_include_chain (pfile
, str
, SYSTEM
, p
->cxx_aware
);
856 /* Search ordinary names for GNU include directories. */
857 for (p
= cpp_include_defaults
; p
->fname
; p
++)
859 /* Some standard dirs are only for C++. */
861 || (CPP_OPTION (pfile
, cplusplus
)
862 && !CPP_OPTION (pfile
, no_standard_cplusplus_includes
)))
864 char *str
= update_path (p
->fname
, p
->component
);
865 append_include_chain (pfile
, str
, SYSTEM
, p
->cxx_aware
);
870 /* Pushes a -imacro and -include file given on the command line onto
871 the buffer stack. Returns non-zero if successful. */
873 push_include (pfile
, p
)
875 struct pending_option
*p
;
879 /* Later: maybe update this to use the #include "" search path
880 if cpp_read_file fails. */
881 header
.type
= CPP_STRING
;
882 header
.val
.str
.text
= (const unsigned char *) p
->arg
;
883 header
.val
.str
.len
= strlen (p
->arg
);
884 /* Make the command line directive take up a line. */
885 pfile
->lexer_pos
.line
= pfile
->lexer_pos
.output_line
= ++pfile
->line
;
887 return _cpp_execute_include (pfile
, &header
, IT_CMDLINE
);
890 /* Frees a pending_option chain. */
893 struct pending_option
*head
;
895 struct pending_option
*next
;
905 /* This is called after options have been processed. Setup for
906 processing input from the file named FNAME, or stdin if it is the
907 empty string. Return 1 on success, 0 on failure. */
909 cpp_start_read (pfile
, fname
)
913 /* Set up the include search path now. */
914 if (! CPP_OPTION (pfile
, no_standard_includes
))
915 init_standard_includes (pfile
);
917 merge_include_chains (pfile
);
919 /* With -v, print the list of dirs to search. */
920 if (CPP_OPTION (pfile
, verbose
))
922 struct search_path
*l
;
923 fprintf (stderr
, _("#include \"...\" search starts here:\n"));
924 for (l
= CPP_OPTION (pfile
, quote_include
); l
; l
= l
->next
)
926 if (l
== CPP_OPTION (pfile
, bracket_include
))
927 fprintf (stderr
, _("#include <...> search starts here:\n"));
928 fprintf (stderr
, " %s\n", l
->name
);
930 fprintf (stderr
, _("End of search list.\n"));
933 if (CPP_OPTION (pfile
, print_deps
))
934 /* Set the default target (if there is none already). */
935 deps_add_default_target (pfile
->deps
, fname
);
937 /* Open the main input file. This must be done early, so we have a
938 buffer to stand on. */
939 if (!_cpp_read_file (pfile
, fname
))
942 /* Set this after cpp_post_options so the client can change the
943 option if it wishes, and after stacking the main file so we don't
944 trace the main file. */
945 pfile
->line_maps
.trace_includes
= CPP_OPTION (pfile
, print_include_names
);
947 /* Install builtins and process command line macros etc. in the order
948 they appeared, but only if not already preprocessed. */
949 if (! CPP_OPTION (pfile
, preprocessed
))
951 struct pending_option
*p
;
953 _cpp_do_file_change (pfile
, LC_RENAME
, _("<builtin>"), 1, 0);
954 init_builtins (pfile
);
955 _cpp_do_file_change (pfile
, LC_RENAME
, _("<command line>"), 1, 0);
956 for (p
= CPP_OPTION (pfile
, pending
)->directive_head
; p
; p
= p
->next
)
957 (*p
->handler
) (pfile
, p
->arg
);
959 /* Scan -imacros files after command line defines, but before
960 files given with -include. */
961 for (p
= CPP_OPTION (pfile
, pending
)->imacros_head
; p
; p
= p
->next
)
963 if (push_include (pfile
, p
))
965 pfile
->buffer
->return_at_eof
= true;
966 cpp_scan_nooutput (pfile
);
971 free_chain (CPP_OPTION (pfile
, pending
)->directive_head
);
972 free_chain (CPP_OPTION (pfile
, pending
)->imacros_head
);
973 _cpp_push_next_buffer (pfile
);
978 /* Called to push the next buffer on the stack given by -include. If
979 there are none, free the pending structure and restore the line map
980 for the main file. */
982 _cpp_push_next_buffer (pfile
)
987 if (CPP_OPTION (pfile
, pending
))
991 struct pending_option
*p
= CPP_OPTION (pfile
, pending
)->include_head
;
995 if (! CPP_OPTION (pfile
, preprocessed
))
996 pushed
= push_include (pfile
, p
);
997 CPP_OPTION (pfile
, pending
)->include_head
= p
->next
;
1003 free (CPP_OPTION (pfile
, pending
));
1004 CPP_OPTION (pfile
, pending
) = NULL
;
1006 /* Restore the line map for the main file. */
1007 if (! CPP_OPTION (pfile
, preprocessed
))
1008 _cpp_do_file_change (pfile
, LC_RENAME
,
1009 pfile
->line_maps
.maps
[0].to_file
, 1, 0);
1016 /* Use mkdeps.c to output dependency information. */
1021 /* Stream on which to print the dependency information. */
1022 FILE *deps_stream
= 0;
1023 const char *deps_mode
= CPP_OPTION (pfile
, print_deps_append
) ? "a" : "w";
1025 if (CPP_OPTION (pfile
, deps_file
) == 0)
1026 deps_stream
= stdout
;
1029 deps_stream
= fopen (CPP_OPTION (pfile
, deps_file
), deps_mode
);
1030 if (deps_stream
== 0)
1032 cpp_notice_from_errno (pfile
, CPP_OPTION (pfile
, deps_file
));
1037 deps_write (pfile
->deps
, deps_stream
, 72);
1039 if (CPP_OPTION (pfile
, deps_phony_targets
))
1040 deps_phony_targets (pfile
->deps
, deps_stream
);
1042 /* Don't close stdout. */
1043 if (CPP_OPTION (pfile
, deps_file
))
1045 if (ferror (deps_stream
) || fclose (deps_stream
) != 0)
1046 cpp_fatal (pfile
, "I/O error on output");
1050 /* This is called at the end of preprocessing. It pops the
1051 last buffer and writes dependency output. It should also
1052 clear macro definitions, such that you could call cpp_start_read
1053 with a new filename to restart processing. */
1058 /* cpplex.c leaves the final buffer on the stack. This it so that
1059 it returns an unending stream of CPP_EOFs to the client. If we
1060 popped the buffer, we'd derefence a NULL buffer pointer and
1061 segfault. It's nice to allow the client to do worry-free excess
1062 cpp_get_token calls. */
1063 while (pfile
->buffer
)
1064 _cpp_pop_buffer (pfile
);
1066 /* Don't write the deps file if preprocessing has failed. */
1067 if (CPP_OPTION (pfile
, print_deps
) && pfile
->errors
== 0)
1068 output_deps (pfile
);
1070 /* Report on headers that could use multiple include guards. */
1071 if (CPP_OPTION (pfile
, print_include_names
))
1072 _cpp_report_missing_guards (pfile
);
1076 new_pending_directive (pend
, text
, handler
)
1077 struct cpp_pending
*pend
;
1079 cl_directive_handler handler
;
1081 struct pending_option
*o
= (struct pending_option
*)
1082 xmalloc (sizeof (struct pending_option
));
1086 o
->handler
= handler
;
1087 APPEND (pend
, directive
, o
);
1090 /* Irix6 "cc -n32" and OSF4 cc have problems with char foo[] = ("string");
1091 I.e. a const string initializer with parens around it. That is
1092 what N_("string") resolves to, so we make no_* be macros instead. */
1093 #define no_arg N_("Argument missing after %s")
1094 #define no_ass N_("Assertion missing after %s")
1095 #define no_dir N_("Directory name missing after %s")
1096 #define no_fil N_("File name missing after %s")
1097 #define no_mac N_("Macro name missing after %s")
1098 #define no_pth N_("Path name missing after %s")
1099 #define no_num N_("Number missing after %s")
1100 #define no_tgt N_("Target missing after %s")
1102 /* This is the list of all command line options, with the leading
1103 "-" removed. It must be sorted in ASCII collating order. */
1104 #define COMMAND_LINE_OPTIONS \
1105 DEF_OPT("$", 0, OPT_dollar) \
1106 DEF_OPT("+", 0, OPT_plus) \
1107 DEF_OPT("-help", 0, OPT__help) \
1108 DEF_OPT("-target-help", 0, OPT_target__help) \
1109 DEF_OPT("-version", 0, OPT__version) \
1110 DEF_OPT("A", no_ass, OPT_A) \
1111 DEF_OPT("C", 0, OPT_C) \
1112 DEF_OPT("D", no_mac, OPT_D) \
1113 DEF_OPT("H", 0, OPT_H) \
1114 DEF_OPT("I", no_dir, OPT_I) \
1115 DEF_OPT("M", 0, OPT_M) \
1116 DEF_OPT("MD", no_fil, OPT_MD) \
1117 DEF_OPT("MF", no_fil, OPT_MF) \
1118 DEF_OPT("MG", 0, OPT_MG) \
1119 DEF_OPT("MM", 0, OPT_MM) \
1120 DEF_OPT("MMD", no_fil, OPT_MMD) \
1121 DEF_OPT("MP", 0, OPT_MP) \
1122 DEF_OPT("MQ", no_tgt, OPT_MQ) \
1123 DEF_OPT("MT", no_tgt, OPT_MT) \
1124 DEF_OPT("P", 0, OPT_P) \
1125 DEF_OPT("U", no_mac, OPT_U) \
1126 DEF_OPT("W", no_arg, OPT_W) /* arg optional */ \
1127 DEF_OPT("d", no_arg, OPT_d) \
1128 DEF_OPT("fleading-underscore", 0, OPT_fleading_underscore) \
1129 DEF_OPT("fno-leading-underscore", 0, OPT_fno_leading_underscore) \
1130 DEF_OPT("fno-operator-names", 0, OPT_fno_operator_names) \
1131 DEF_OPT("fno-preprocessed", 0, OPT_fno_preprocessed) \
1132 DEF_OPT("fno-show-column", 0, OPT_fno_show_column) \
1133 DEF_OPT("fpreprocessed", 0, OPT_fpreprocessed) \
1134 DEF_OPT("fshow-column", 0, OPT_fshow_column) \
1135 DEF_OPT("ftabstop=", no_num, OPT_ftabstop) \
1136 DEF_OPT("h", 0, OPT_h) \
1137 DEF_OPT("idirafter", no_dir, OPT_idirafter) \
1138 DEF_OPT("imacros", no_fil, OPT_imacros) \
1139 DEF_OPT("include", no_fil, OPT_include) \
1140 DEF_OPT("iprefix", no_pth, OPT_iprefix) \
1141 DEF_OPT("isystem", no_dir, OPT_isystem) \
1142 DEF_OPT("iwithprefix", no_dir, OPT_iwithprefix) \
1143 DEF_OPT("iwithprefixbefore", no_dir, OPT_iwithprefixbefore) \
1144 DEF_OPT("lang-asm", 0, OPT_lang_asm) \
1145 DEF_OPT("lang-c", 0, OPT_lang_c) \
1146 DEF_OPT("lang-c++", 0, OPT_lang_cplusplus) \
1147 DEF_OPT("lang-c89", 0, OPT_lang_c89) \
1148 DEF_OPT("lang-objc", 0, OPT_lang_objc) \
1149 DEF_OPT("lang-objc++", 0, OPT_lang_objcplusplus) \
1150 DEF_OPT("nostdinc", 0, OPT_nostdinc) \
1151 DEF_OPT("nostdinc++", 0, OPT_nostdincplusplus) \
1152 DEF_OPT("o", no_fil, OPT_o) \
1153 DEF_OPT("pedantic", 0, OPT_pedantic) \
1154 DEF_OPT("pedantic-errors", 0, OPT_pedantic_errors) \
1155 DEF_OPT("remap", 0, OPT_remap) \
1156 DEF_OPT("std=c++98", 0, OPT_std_cplusplus98) \
1157 DEF_OPT("std=c89", 0, OPT_std_c89) \
1158 DEF_OPT("std=c99", 0, OPT_std_c99) \
1159 DEF_OPT("std=c9x", 0, OPT_std_c9x) \
1160 DEF_OPT("std=gnu89", 0, OPT_std_gnu89) \
1161 DEF_OPT("std=gnu99", 0, OPT_std_gnu99) \
1162 DEF_OPT("std=gnu9x", 0, OPT_std_gnu9x) \
1163 DEF_OPT("std=iso9899:1990", 0, OPT_std_iso9899_1990) \
1164 DEF_OPT("std=iso9899:199409", 0, OPT_std_iso9899_199409) \
1165 DEF_OPT("std=iso9899:1999", 0, OPT_std_iso9899_1999) \
1166 DEF_OPT("std=iso9899:199x", 0, OPT_std_iso9899_199x) \
1167 DEF_OPT("trigraphs", 0, OPT_trigraphs) \
1168 DEF_OPT("v", 0, OPT_v) \
1169 DEF_OPT("version", 0, OPT_version) \
1170 DEF_OPT("w", 0, OPT_w)
1172 #define DEF_OPT(text, msg, code) code,
1175 COMMAND_LINE_OPTIONS
1182 const char *opt_text
;
1185 enum opt_code opt_code
;
1188 #define DEF_OPT(text, msg, code) { text, msg, sizeof(text) - 1, code },
1190 static struct cl_option cl_options
[] =
1192 static const struct cl_option cl_options
[] =
1195 COMMAND_LINE_OPTIONS
1198 #undef COMMAND_LINE_OPTIONS
1200 /* Perform a binary search to find which, if any, option the given
1201 command-line matches. Returns its index in the option array,
1202 negative on failure. Complications arise since some options can be
1203 suffixed with an argument, and multiple complete matches can occur,
1204 e.g. -iwithprefix and -iwithprefixbefore. Moreover, we need to
1205 accept options beginning with -W that we do not recognise, but not
1206 to swallow any subsequent command line argument; this is handled as
1207 special cases in cpp_handle_option. */
1209 parse_option (input
)
1212 unsigned int md
, mn
, mx
;
1223 opt_len
= cl_options
[md
].opt_len
;
1224 comp
= memcmp (input
, cl_options
[md
].opt_text
, opt_len
);
1232 if (input
[opt_len
] == '\0')
1234 /* We were passed more text. If the option takes an argument,
1235 we may match a later option or we may have been passed the
1236 argument. The longest possible option match succeeds.
1237 If the option takes no arguments we have not matched and
1238 continue the search (e.g. input="stdc++" match was "stdc"). */
1240 if (cl_options
[md
].msg
)
1242 /* Scan forwards. If we get an exact match, return it.
1243 Otherwise, return the longest option-accepting match.
1244 This loops no more than twice with current options. */
1246 for (; mn
< (unsigned int) N_OPTS
; mn
++)
1248 opt_len
= cl_options
[mn
].opt_len
;
1249 if (memcmp (input
, cl_options
[mn
].opt_text
, opt_len
))
1251 if (input
[opt_len
] == '\0')
1253 if (cl_options
[mn
].msg
)
1264 /* Handle one command-line option in (argc, argv).
1265 Can be called multiple times, to handle multiple sets of options.
1266 Returns number of strings consumed. */
1269 cpp_handle_option (pfile
, argc
, argv
)
1275 struct cpp_pending
*pend
= CPP_OPTION (pfile
, pending
);
1277 /* Interpret "-" or a non-option as a file name. */
1278 if (argv
[i
][0] != '-' || argv
[i
][1] == '\0')
1280 if (CPP_OPTION (pfile
, in_fname
) == NULL
)
1281 CPP_OPTION (pfile
, in_fname
) = argv
[i
];
1282 else if (CPP_OPTION (pfile
, out_fname
) == NULL
)
1283 CPP_OPTION (pfile
, out_fname
) = argv
[i
];
1285 cpp_fatal (pfile
, "Too many filenames. Type %s --help for usage info",
1290 enum opt_code opt_code
;
1292 const char *arg
= 0;
1294 /* Skip over '-'. */
1295 opt_index
= parse_option (&argv
[i
][1]);
1299 opt_code
= cl_options
[opt_index
].opt_code
;
1300 if (cl_options
[opt_index
].msg
)
1302 arg
= &argv
[i
][cl_options
[opt_index
].opt_len
+ 1];
1304 /* Yuk. Special case for -W as it must not swallow
1305 up any following argument. If this becomes common, add
1306 another field to the cl_options table. */
1307 if (arg
[0] == '\0' && opt_code
!= OPT_W
)
1312 cpp_fatal (pfile
, cl_options
[opt_index
].msg
, argv
[i
- 1]);
1320 case N_OPTS
: /* Shut GCC up. */
1322 case OPT_fleading_underscore
:
1323 CPP_OPTION (pfile
, user_label_prefix
) = "_";
1325 case OPT_fno_leading_underscore
:
1326 CPP_OPTION (pfile
, user_label_prefix
) = "";
1328 case OPT_fno_operator_names
:
1329 CPP_OPTION (pfile
, operator_names
) = 0;
1331 case OPT_fpreprocessed
:
1332 CPP_OPTION (pfile
, preprocessed
) = 1;
1334 case OPT_fno_preprocessed
:
1335 CPP_OPTION (pfile
, preprocessed
) = 0;
1337 case OPT_fshow_column
:
1338 CPP_OPTION (pfile
, show_column
) = 1;
1340 case OPT_fno_show_column
:
1341 CPP_OPTION (pfile
, show_column
) = 0;
1344 /* Silently ignore empty string, non-longs and silly values. */
1348 long tabstop
= strtol (arg
, &endptr
, 10);
1349 if (*endptr
== '\0' && tabstop
>= 1 && tabstop
<= 100)
1350 CPP_OPTION (pfile
, tabstop
) = tabstop
;
1354 CPP_OPTION (pfile
, inhibit_warnings
) = 1;
1359 CPP_OPTION (pfile
, help_only
) = 1;
1361 case OPT_target__help
:
1362 /* Print if any target specific options. cpplib has none, but
1363 make sure help_only gets set. */
1364 CPP_OPTION (pfile
, help_only
) = 1;
1367 /* --version inhibits compilation, -version doesn't. -v means
1368 verbose and -version. Historical reasons, don't ask. */
1370 CPP_OPTION (pfile
, help_only
) = 1;
1371 pfile
->print_version
= 1;
1374 CPP_OPTION (pfile
, verbose
) = 1;
1375 pfile
->print_version
= 1;
1378 pfile
->print_version
= 1;
1382 CPP_OPTION (pfile
, discard_comments
) = 0;
1385 CPP_OPTION (pfile
, no_line_commands
) = 1;
1387 case OPT_dollar
: /* Don't include $ in identifiers. */
1388 CPP_OPTION (pfile
, dollars_in_ident
) = 0;
1391 CPP_OPTION (pfile
, print_include_names
) = 1;
1394 new_pending_directive (pend
, arg
, cpp_define
);
1396 case OPT_pedantic_errors
:
1397 CPP_OPTION (pfile
, pedantic_errors
) = 1;
1400 CPP_OPTION (pfile
, pedantic
) = 1;
1403 CPP_OPTION (pfile
, trigraphs
) = 1;
1406 CPP_OPTION (pfile
, cplusplus
) = 1;
1407 CPP_OPTION (pfile
, cplusplus_comments
) = 1;
1410 CPP_OPTION (pfile
, remap
) = 1;
1413 CPP_OPTION (pfile
, include_prefix
) = arg
;
1414 CPP_OPTION (pfile
, include_prefix_len
) = strlen (arg
);
1417 set_lang (pfile
, CLK_GNUC89
);
1419 case OPT_lang_cplusplus
:
1420 set_lang (pfile
, CLK_GNUCXX
);
1423 set_lang (pfile
, CLK_OBJC
);
1425 case OPT_lang_objcplusplus
:
1426 set_lang (pfile
, CLK_OBJCXX
);
1429 set_lang (pfile
, CLK_ASM
);
1431 case OPT_std_cplusplus98
:
1432 set_lang (pfile
, CLK_CXX98
);
1435 set_lang (pfile
, CLK_GNUC89
);
1439 set_lang (pfile
, CLK_GNUC99
);
1441 case OPT_std_iso9899_199409
:
1442 set_lang (pfile
, CLK_STDC94
);
1444 case OPT_std_iso9899_1990
:
1447 set_lang (pfile
, CLK_STDC89
);
1449 case OPT_std_iso9899_199x
:
1450 case OPT_std_iso9899_1999
:
1453 set_lang (pfile
, CLK_STDC99
);
1456 /* -nostdinc causes no default include directories.
1457 You must specify all include-file directories with -I. */
1458 CPP_OPTION (pfile
, no_standard_includes
) = 1;
1460 case OPT_nostdincplusplus
:
1461 /* -nostdinc++ causes no default C++-specific include directories. */
1462 CPP_OPTION (pfile
, no_standard_cplusplus_includes
) = 1;
1465 if (CPP_OPTION (pfile
, out_fname
) == NULL
)
1466 CPP_OPTION (pfile
, out_fname
) = arg
;
1469 cpp_fatal (pfile
, "Output filename specified twice");
1474 /* Args to -d specify what parts of macros to dump.
1475 Silently ignore unrecognised options; they may
1476 be aimed at the compiler proper. */
1480 while ((c
= *arg
++) != '\0')
1484 CPP_OPTION (pfile
, dump_macros
) = dump_only
;
1485 CPP_OPTION (pfile
, no_output
) = 1;
1488 CPP_OPTION (pfile
, dump_macros
) = dump_names
;
1491 CPP_OPTION (pfile
, dump_macros
) = dump_definitions
;
1494 CPP_OPTION (pfile
, dump_includes
) = 1;
1501 CPP_OPTION (pfile
, print_deps_missing_files
) = 1;
1504 CPP_OPTION (pfile
, print_deps
) = 2;
1507 CPP_OPTION (pfile
, print_deps
) = 1;
1510 CPP_OPTION (pfile
, deps_file
) = arg
;
1513 CPP_OPTION (pfile
, deps_phony_targets
) = 1;
1517 /* Add a target. -MQ quotes for Make. */
1518 deps_add_target (pfile
->deps
, arg
, opt_code
== OPT_MQ
);
1521 /* -MD and -MMD for cpp0 are deprecated and undocumented
1522 (use -M or -MM with -MF instead), and probably should be
1523 removed with the next major GCC version. For the moment
1524 we allow these for the benefit of Automake 1.4, which
1525 uses these when dependency tracking is enabled. Automake
1526 1.5 will fix this. */
1528 CPP_OPTION (pfile
, print_deps
) = 2;
1529 CPP_OPTION (pfile
, deps_file
) = arg
;
1532 CPP_OPTION (pfile
, print_deps
) = 1;
1533 CPP_OPTION (pfile
, deps_file
) = arg
;
1539 /* -A with an argument beginning with '-' acts as
1540 #unassert on whatever immediately follows the '-'.
1541 If "-" is the whole argument, we eliminate all
1542 predefined macros and assertions, including those
1543 that were specified earlier on the command line.
1544 That way we can get rid of any that were passed
1545 automatically in from GCC. */
1549 struct pending_option
*o1
, *o2
;
1551 o1
= pend
->directive_head
;
1558 pend
->directive_head
= NULL
;
1559 pend
->directive_tail
= NULL
;
1562 new_pending_directive (pend
, arg
+ 1, cpp_unassert
);
1565 new_pending_directive (pend
, arg
, cpp_assert
);
1568 new_pending_directive (pend
, arg
, cpp_undef
);
1570 case OPT_I
: /* Add directory to path for includes. */
1571 if (!strcmp (arg
, "-"))
1574 Use the preceding -I directories for #include "..."
1575 but not #include <...>.
1576 Don't search the directory of the present file
1577 for #include "...". (Note that -I. -I- is not the same as
1578 the default setup; -I. uses the compiler's working dir.) */
1579 if (! CPP_OPTION (pfile
, ignore_srcdir
))
1581 pend
->quote_head
= pend
->brack_head
;
1582 pend
->quote_tail
= pend
->brack_tail
;
1583 pend
->brack_head
= 0;
1584 pend
->brack_tail
= 0;
1585 CPP_OPTION (pfile
, ignore_srcdir
) = 1;
1589 cpp_fatal (pfile
, "-I- specified twice");
1594 append_include_chain (pfile
, xstrdup (arg
), BRACKET
, 0);
1597 /* Add directory to beginning of system include path, as a system
1598 include directory. */
1599 append_include_chain (pfile
, xstrdup (arg
), SYSTEM
, 0);
1604 struct pending_option
*o
= (struct pending_option
*)
1605 xmalloc (sizeof (struct pending_option
));
1609 if (opt_code
== OPT_include
)
1610 APPEND (pend
, include
, o
);
1612 APPEND (pend
, imacros
, o
);
1615 case OPT_iwithprefix
:
1616 /* Add directory to end of path for includes,
1617 with the default prefix at the front of its name. */
1619 case OPT_iwithprefixbefore
:
1620 /* Add directory to main path for includes,
1621 with the default prefix at the front of its name. */
1628 if (CPP_OPTION (pfile
, include_prefix
) != 0)
1630 size_t ipl
= CPP_OPTION (pfile
, include_prefix_len
);
1631 fname
= xmalloc (ipl
+ len
+ 1);
1632 memcpy (fname
, CPP_OPTION (pfile
, include_prefix
), ipl
);
1633 memcpy (fname
+ ipl
, arg
, len
+ 1);
1635 else if (cpp_GCC_INCLUDE_DIR_len
)
1637 fname
= xmalloc (cpp_GCC_INCLUDE_DIR_len
+ len
+ 1);
1638 memcpy (fname
, cpp_GCC_INCLUDE_DIR
, cpp_GCC_INCLUDE_DIR_len
);
1639 memcpy (fname
+ cpp_GCC_INCLUDE_DIR_len
, arg
, len
+ 1);
1642 fname
= xstrdup (arg
);
1644 append_include_chain (pfile
, fname
,
1645 opt_code
== OPT_iwithprefix
? SYSTEM
: BRACKET
, 0);
1649 /* Add directory to end of path for includes. */
1650 append_include_chain (pfile
, xstrdup (arg
), AFTER
, 0);
1653 /* Silently ignore unrecognised options. */
1654 if (!strcmp (argv
[i
], "-Wall"))
1656 CPP_OPTION (pfile
, warn_trigraphs
) = 1;
1657 CPP_OPTION (pfile
, warn_comments
) = 1;
1659 else if (!strcmp (argv
[i
], "-Wtraditional"))
1660 CPP_OPTION (pfile
, warn_traditional
) = 1;
1661 else if (!strcmp (argv
[i
], "-Wtrigraphs"))
1662 CPP_OPTION (pfile
, warn_trigraphs
) = 1;
1663 else if (!strcmp (argv
[i
], "-Wcomment"))
1664 CPP_OPTION (pfile
, warn_comments
) = 1;
1665 else if (!strcmp (argv
[i
], "-Wcomments"))
1666 CPP_OPTION (pfile
, warn_comments
) = 1;
1667 else if (!strcmp (argv
[i
], "-Wundef"))
1668 CPP_OPTION (pfile
, warn_undef
) = 1;
1669 else if (!strcmp (argv
[i
], "-Wimport"))
1670 CPP_OPTION (pfile
, warn_import
) = 1;
1671 else if (!strcmp (argv
[i
], "-Werror"))
1672 CPP_OPTION (pfile
, warnings_are_errors
) = 1;
1673 else if (!strcmp (argv
[i
], "-Wsystem-headers"))
1674 CPP_OPTION (pfile
, warn_system_headers
) = 1;
1675 else if (!strcmp (argv
[i
], "-Wno-traditional"))
1676 CPP_OPTION (pfile
, warn_traditional
) = 0;
1677 else if (!strcmp (argv
[i
], "-Wno-trigraphs"))
1678 CPP_OPTION (pfile
, warn_trigraphs
) = 0;
1679 else if (!strcmp (argv
[i
], "-Wno-comment"))
1680 CPP_OPTION (pfile
, warn_comments
) = 0;
1681 else if (!strcmp (argv
[i
], "-Wno-comments"))
1682 CPP_OPTION (pfile
, warn_comments
) = 0;
1683 else if (!strcmp (argv
[i
], "-Wno-undef"))
1684 CPP_OPTION (pfile
, warn_undef
) = 0;
1685 else if (!strcmp (argv
[i
], "-Wno-import"))
1686 CPP_OPTION (pfile
, warn_import
) = 0;
1687 else if (!strcmp (argv
[i
], "-Wno-error"))
1688 CPP_OPTION (pfile
, warnings_are_errors
) = 0;
1689 else if (!strcmp (argv
[i
], "-Wno-system-headers"))
1690 CPP_OPTION (pfile
, warn_system_headers
) = 0;
1697 /* Handle command-line options in (argc, argv).
1698 Can be called multiple times, to handle multiple sets of options.
1699 Returns if an unrecognized option is seen.
1700 Returns number of strings consumed. */
1702 cpp_handle_options (pfile
, argc
, argv
)
1708 int strings_processed
;
1710 for (i
= 0; i
< argc
; i
+= strings_processed
)
1712 strings_processed
= cpp_handle_option (pfile
, argc
- i
, argv
+ i
);
1713 if (strings_processed
== 0)
1720 /* Extra processing when all options are parsed, after all calls to
1721 cpp_handle_option[s]. Consistency checks etc. */
1723 cpp_post_options (pfile
)
1726 if (pfile
->print_version
)
1728 fprintf (stderr
, _("GNU CPP version %s (cpplib)"), version_string
);
1729 #ifdef TARGET_VERSION
1732 fputc ('\n', stderr
);
1735 /* Canonicalize in_fname and out_fname. We guarantee they are not
1736 NULL, and that the empty string represents stdin / stdout. */
1737 if (CPP_OPTION (pfile
, in_fname
) == NULL
1738 || !strcmp (CPP_OPTION (pfile
, in_fname
), "-"))
1739 CPP_OPTION (pfile
, in_fname
) = "";
1741 if (CPP_OPTION (pfile
, out_fname
) == NULL
1742 || !strcmp (CPP_OPTION (pfile
, out_fname
), "-"))
1743 CPP_OPTION (pfile
, out_fname
) = "";
1745 /* -Wtraditional is not useful in C++ mode. */
1746 if (CPP_OPTION (pfile
, cplusplus
))
1747 CPP_OPTION (pfile
, warn_traditional
) = 0;
1749 /* Set this if it hasn't been set already. */
1750 if (CPP_OPTION (pfile
, user_label_prefix
) == NULL
)
1751 CPP_OPTION (pfile
, user_label_prefix
) = USER_LABEL_PREFIX
;
1753 /* Permanently disable macro expansion if we are rescanning
1754 preprocessed text. */
1755 if (CPP_OPTION (pfile
, preprocessed
))
1756 pfile
->state
.prevent_expansion
= 1;
1758 /* We need to do this after option processing and before
1759 cpp_start_read, as cppmain.c relies on the options->no_output to
1760 set its callbacks correctly before calling cpp_start_read. */
1761 init_dependency_output (pfile
);
1763 /* After checking the environment variables, check if -M or -MM has
1764 not been specified, but other -M options have. */
1765 if (CPP_OPTION (pfile
, print_deps
) == 0 &&
1766 (CPP_OPTION (pfile
, print_deps_missing_files
)
1767 || CPP_OPTION (pfile
, deps_file
)
1768 || CPP_OPTION (pfile
, deps_phony_targets
)))
1769 cpp_fatal (pfile
, "you must additionally specify either -M or -MM");
1772 /* Set up dependency-file output. */
1774 init_dependency_output (pfile
)
1777 char *spec
, *s
, *output_file
;
1779 /* Either of two environment variables can specify output of deps.
1780 Its value is either "OUTPUT_FILE" or "OUTPUT_FILE DEPS_TARGET",
1781 where OUTPUT_FILE is the file to write deps info to
1782 and DEPS_TARGET is the target to mention in the deps. */
1784 if (CPP_OPTION (pfile
, print_deps
) == 0)
1786 spec
= getenv ("DEPENDENCIES_OUTPUT");
1788 CPP_OPTION (pfile
, print_deps
) = 1;
1791 spec
= getenv ("SUNPRO_DEPENDENCIES");
1793 CPP_OPTION (pfile
, print_deps
) = 2;
1798 /* Find the space before the DEPS_TARGET, if there is one. */
1799 s
= strchr (spec
, ' ');
1802 /* Let the caller perform MAKE quoting. */
1803 deps_add_target (pfile
->deps
, s
+ 1, 0);
1804 output_file
= (char *) xmalloc (s
- spec
+ 1);
1805 memcpy (output_file
, spec
, s
- spec
);
1806 output_file
[s
- spec
] = 0;
1811 /* Command line overrides environment variables. */
1812 if (CPP_OPTION (pfile
, deps_file
) == 0)
1813 CPP_OPTION (pfile
, deps_file
) = output_file
;
1814 CPP_OPTION (pfile
, print_deps_append
) = 1;
1817 /* If dependencies go to standard output, or -MG is used, we should
1818 suppress output, including -dM, -dI etc. */
1819 if (CPP_OPTION (pfile
, deps_file
) == 0
1820 || CPP_OPTION (pfile
, print_deps_missing_files
))
1822 CPP_OPTION (pfile
, no_output
) = 1;
1823 CPP_OPTION (pfile
, dump_macros
) = 0;
1824 CPP_OPTION (pfile
, dump_includes
) = 0;
1831 fprintf (stderr
, _("Usage: %s [switches] input output\n"), progname
);
1832 /* To keep the lines from getting too long for some compilers, limit
1833 to about 500 characters (6 lines) per chunk. */
1836 -include <file> Include the contents of <file> before other files\n\
1837 -imacros <file> Accept definition of macros in <file>\n\
1838 -iprefix <path> Specify <path> as a prefix for next two options\n\
1839 -iwithprefix <dir> Add <dir> to the end of the system include path\n\
1840 -iwithprefixbefore <dir> Add <dir> to the end of the main include path\n\
1841 -isystem <dir> Add <dir> to the start of the system include path\n\
1844 -idirafter <dir> Add <dir> to the end of the system include path\n\
1845 -I <dir> Add <dir> to the end of the main include path\n\
1846 -I- Fine-grained include path control; see info docs\n\
1847 -nostdinc Do not search system include directories\n\
1848 (dirs specified with -isystem will still be used)\n\
1849 -nostdinc++ Do not search system include directories for C++\n\
1850 -o <file> Put output into <file>\n\
1853 -pedantic Issue all warnings demanded by strict ISO C\n\
1854 -pedantic-errors Issue -pedantic warnings as errors instead\n\
1855 -trigraphs Support ISO C trigraphs\n\
1856 -lang-c Assume that the input sources are in C\n\
1857 -lang-c89 Assume that the input sources are in C89\n\
1860 -lang-c++ Assume that the input sources are in C++\n\
1861 -lang-objc Assume that the input sources are in ObjectiveC\n\
1862 -lang-objc++ Assume that the input sources are in ObjectiveC++\n\
1863 -lang-asm Assume that the input sources are in assembler\n\
1866 -std=<std name> Specify the conformance standard; one of:\n\
1867 gnu89, gnu99, c89, c99, iso9899:1990,\n\
1868 iso9899:199409, iso9899:1999\n\
1869 -+ Allow parsing of C++ style features\n\
1870 -w Inhibit warning messages\n\
1871 -Wtrigraphs Warn if trigraphs are encountered\n\
1872 -Wno-trigraphs Do not warn about trigraphs\n\
1873 -Wcomment{s} Warn if one comment starts inside another\n\
1876 -Wno-comment{s} Do not warn about comments\n\
1877 -Wtraditional Warn about features not present in traditional C\n\
1878 -Wno-traditional Do not warn about traditional C\n\
1879 -Wundef Warn if an undefined macro is used by #if\n\
1880 -Wno-undef Do not warn about testing undefined macros\n\
1881 -Wimport Warn about the use of the #import directive\n\
1884 -Wno-import Do not warn about the use of #import\n\
1885 -Werror Treat all warnings as errors\n\
1886 -Wno-error Do not treat warnings as errors\n\
1887 -Wsystem-headers Do not suppress warnings from system headers\n\
1888 -Wno-system-headers Suppress warnings from system headers\n\
1889 -Wall Enable all preprocessor warnings\n\
1892 -M Generate make dependencies\n\
1893 -MM As -M, but ignore system header files\n\
1894 -MF <file> Write dependency output to the given file\n\
1895 -MG Treat missing header file as generated files\n\
1898 -MP Generate phony targets for all headers\n\
1899 -MQ <target> Add a MAKE-quoted target\n\
1900 -MT <target> Add an unquoted target\n\
1903 -D<macro> Define a <macro> with string '1' as its value\n\
1904 -D<macro>=<val> Define a <macro> with <val> as its value\n\
1905 -A<question> (<answer>) Assert the <answer> to <question>\n\
1906 -A-<question> (<answer>) Disable the <answer> to <question>\n\
1907 -U<macro> Undefine <macro> \n\
1908 -v Display the version number\n\
1911 -H Print the name of header files as they are used\n\
1912 -C Do not discard comments\n\
1913 -dM Display a list of macro definitions active at end\n\
1914 -dD Preserve macro definitions in output\n\
1915 -dN As -dD except that only the names are preserved\n\
1916 -dI Include #include directives in the output\n\
1919 -fpreprocessed Treat the input file as already preprocessed\n\
1920 -ftabstop=<number> Distance between tab stops for column reporting\n\
1921 -P Do not generate #line directives\n\
1922 -$ Do not allow '$' in identifiers\n\
1923 -remap Remap file names when including files.\n\
1924 --version Display version information\n\
1925 -h or --help Display this information\n\