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"
32 /* Windows does not natively support inodes, and neither does MSDOS.
33 Cygwin's emulation can generate non-unique inodes, so don't use it.
34 VMS has non-numeric inodes. */
36 # define INO_T_EQ(A, B) (!memcmp (&(A), &(B), sizeof (A)))
37 # define INO_T_COPY(DEST, SRC) memcpy(&(DEST), &(SRC), sizeof (SRC))
39 # if (defined _WIN32 && ! defined (_UWIN)) || defined __MSDOS__
40 # define INO_T_EQ(A, B) 0
42 # define INO_T_EQ(A, B) ((A) == (B))
44 # define INO_T_COPY(DEST, SRC) (DEST) = (SRC)
47 /* Internal structures and prototypes. */
49 /* A `struct pending_option' remembers one -D, -A, -U, -include, or
51 typedef void (* cl_directive_handler) PARAMS ((cpp_reader *, const char *));
54 struct pending_option *next;
56 cl_directive_handler handler;
59 /* The `pending' structure accumulates all the options that are not
60 actually processed until we hit cpp_read_main_file. It consists of
61 several lists, one for each type of option. We keep both head and
62 tail pointers for quick insertion. */
65 struct pending_option *directive_head, *directive_tail;
67 struct search_path *quote_head, *quote_tail;
68 struct search_path *brack_head, *brack_tail;
69 struct search_path *systm_head, *systm_tail;
70 struct search_path *after_head, *after_tail;
72 struct pending_option *imacros_head, *imacros_tail;
73 struct pending_option *include_head, *include_tail;
77 #define APPEND(pend, list, elt) \
78 do { if (!(pend)->list##_head) (pend)->list##_head = (elt); \
79 else (pend)->list##_tail->next = (elt); \
80 (pend)->list##_tail = (elt); \
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); \
90 static void path_include PARAMS ((cpp_reader *,
92 static void init_library PARAMS ((void));
93 static void init_builtins PARAMS ((cpp_reader *));
94 static void mark_named_operators PARAMS ((cpp_reader *));
95 static void append_include_chain PARAMS ((cpp_reader *,
97 static struct search_path * remove_dup_dir PARAMS ((cpp_reader *,
98 struct search_path *));
99 static struct search_path * remove_dup_dirs PARAMS ((cpp_reader *,
100 struct search_path *));
101 static void merge_include_chains PARAMS ((cpp_reader *));
102 static bool push_include PARAMS ((cpp_reader *,
103 struct pending_option *));
104 static void free_chain PARAMS ((struct pending_option *));
105 static void set_lang PARAMS ((cpp_reader *, enum c_lang));
106 static void init_dependency_output PARAMS ((cpp_reader *));
107 static void init_standard_includes PARAMS ((cpp_reader *));
108 static void read_original_filename PARAMS ((cpp_reader *));
109 static void new_pending_directive PARAMS ((struct cpp_pending *,
111 cl_directive_handler));
112 static void output_deps PARAMS ((cpp_reader *));
113 static int parse_option PARAMS ((const char *));
115 /* Fourth argument to append_include_chain: chain to use.
116 Note it's never asked to append to the quote chain. */
117 enum { BRACKET = 0, SYSTEM, AFTER };
119 /* If we have designated initializers (GCC >2.7) these tables can be
120 initialized, constant data. Otherwise, they have to be filled in at
122 #if HAVE_DESIGNATED_INITIALIZERS
124 #define init_trigraph_map() /* Nothing. */
125 #define TRIGRAPH_MAP \
126 __extension__ const uchar _cpp_trigraph_map[UCHAR_MAX + 1] = {
129 #define s(p, v) [p] = v,
133 #define TRIGRAPH_MAP uchar _cpp_trigraph_map[UCHAR_MAX + 1] = { 0 }; \
134 static void init_trigraph_map PARAMS ((void)) { \
135 unsigned char *x = _cpp_trigraph_map;
138 #define s(p, v) x[p] = v;
143 s('=', '#') s(')', ']') s('!', '|')
144 s('(', '[') s('\'', '^') s('>', '}')
145 s('/', '\\') s('<', '{') s('-', '~')
152 /* Given a colon-separated list of file names PATH,
153 add all the names to the search path for include files. */
155 path_include (pfile, list, path)
166 /* Find the end of this name. */
168 while (*q != 0 && *q != PATH_SEPARATOR) q++;
171 /* An empty name in the path stands for the current directory. */
172 name = (char *) xmalloc (2);
178 /* Otherwise use the directory that is named. */
179 name = (char *) xmalloc (q - p + 1);
180 memcpy (name, p, q - p);
184 append_include_chain (pfile, name, path, 0);
186 /* Advance past this name. */
194 /* Append DIR to include path PATH. DIR must be allocated on the
195 heap; this routine takes responsibility for freeing it. CXX_AWARE
196 is non-zero if the header contains extern "C" guards for C++,
197 otherwise it is zero. */
199 append_include_chain (pfile, dir, path, cxx_aware)
205 struct cpp_pending *pend = CPP_OPTION (pfile, pending);
206 struct search_path *new;
215 _cpp_simplify_pathname (dir);
219 /* Dirs that don't exist are silently ignored. */
221 cpp_errno (pfile, DL_ERROR, dir);
222 else if (CPP_OPTION (pfile, verbose))
223 fprintf (stderr, _("ignoring nonexistent directory \"%s\"\n"), dir);
228 if (!S_ISDIR (st.st_mode))
230 cpp_error_with_line (pfile, DL_ERROR, 0, 0, "%s: Not a directory", dir);
236 if (len > pfile->max_include_len)
237 pfile->max_include_len = len;
239 new = (struct search_path *) xmalloc (sizeof (struct search_path));
242 INO_T_COPY (new->ino, st.st_ino);
243 new->dev = st.st_dev;
244 /* Both systm and after include file lists should be treated as system
245 include files since these two lists are really just a concatenation
246 of one "system" list. */
247 if (path == SYSTEM || path == AFTER)
248 new->sysp = cxx_aware ? 1 : 2;
251 new->name_map = NULL;
256 case BRACKET: APPEND (pend, brack, new); break;
257 case SYSTEM: APPEND (pend, systm, new); break;
258 case AFTER: APPEND (pend, after, new); break;
262 /* Handle a duplicated include path. PREV is the link in the chain
263 before the duplicate. The duplicate is removed from the chain and
264 freed. Returns PREV. */
265 static struct search_path *
266 remove_dup_dir (pfile, prev)
268 struct search_path *prev;
270 struct search_path *cur = prev->next;
272 if (CPP_OPTION (pfile, verbose))
273 fprintf (stderr, _("ignoring duplicate directory \"%s\"\n"), cur->name);
275 prev->next = cur->next;
276 free ((PTR) cur->name);
282 /* Remove duplicate directories from a chain. Returns the tail of the
283 chain, or NULL if the chain is empty. This algorithm is quadratic
284 in the number of -I switches, which is acceptable since there
285 aren't usually that many of them. */
286 static struct search_path *
287 remove_dup_dirs (pfile, head)
289 struct search_path *head;
291 struct search_path *prev = NULL, *cur, *other;
293 for (cur = head; cur; cur = cur->next)
295 for (other = head; other != cur; other = other->next)
296 if (INO_T_EQ (cur->ino, other->ino) && cur->dev == other->dev)
298 if (cur->sysp && !other->sysp)
300 cpp_error (pfile, DL_WARNING,
301 "changing search order for system directory \"%s\"",
303 if (strcmp (cur->name, other->name))
304 cpp_error (pfile, DL_WARNING,
305 " as it is the same as non-system directory \"%s\"",
308 cpp_error (pfile, DL_WARNING,
309 " as it has already been specified as a non-system directory");
311 cur = remove_dup_dir (pfile, prev);
320 /* Merge the four include chains together in the order quote, bracket,
321 system, after. Remove duplicate dirs (as determined by
322 INO_T_EQ()). The system_include and after_include chains are never
323 referred to again after this function; all access is through the
324 bracket_include path. */
326 merge_include_chains (pfile)
329 struct search_path *quote, *brack, *systm, *qtail;
331 struct cpp_pending *pend = CPP_OPTION (pfile, pending);
333 quote = pend->quote_head;
334 brack = pend->brack_head;
335 systm = pend->systm_head;
336 qtail = pend->quote_tail;
338 /* Paste together bracket, system, and after include chains. */
340 pend->systm_tail->next = pend->after_head;
342 systm = pend->after_head;
345 pend->brack_tail->next = systm;
349 /* This is a bit tricky. First we drop dupes from the quote-include
350 list. Then we drop dupes from the bracket-include list.
351 Finally, if qtail and brack are the same directory, we cut out
352 brack and move brack up to point to qtail.
354 We can't just merge the lists and then uniquify them because
355 then we may lose directories from the <> search path that should
356 be there; consider -Ifoo -Ibar -I- -Ifoo -Iquux. It is however
357 safe to treat -Ibar -Ifoo -I- -Ifoo -Iquux as if written
358 -Ibar -I- -Ifoo -Iquux. */
360 remove_dup_dirs (pfile, brack);
361 qtail = remove_dup_dirs (pfile, quote);
367 /* If brack == qtail, remove brack as it's simpler. */
368 if (brack && INO_T_EQ (qtail->ino, brack->ino)
369 && qtail->dev == brack->dev)
370 brack = remove_dup_dir (pfile, qtail);
375 CPP_OPTION (pfile, quote_include) = quote;
376 CPP_OPTION (pfile, bracket_include) = brack;
379 /* A set of booleans indicating what CPP features each source language
385 char extended_numbers;
387 char dollars_in_ident;
388 char cplusplus_comments;
392 /* ??? Enable $ in identifiers in assembly? */
393 static const struct lang_flags lang_defaults[] =
394 { /* c99 c++ xnum std dollar c++comm digr */
395 /* GNUC89 */ { 0, 0, 1, 0, 1, 1, 1 },
396 /* GNUC99 */ { 1, 0, 1, 0, 1, 1, 1 },
397 /* STDC89 */ { 0, 0, 0, 1, 0, 0, 0 },
398 /* STDC94 */ { 0, 0, 0, 1, 0, 0, 1 },
399 /* STDC99 */ { 1, 0, 1, 1, 0, 1, 1 },
400 /* GNUCXX */ { 0, 1, 1, 0, 1, 1, 1 },
401 /* CXX98 */ { 0, 1, 1, 1, 0, 1, 1 },
402 /* ASM */ { 0, 0, 1, 0, 0, 1, 0 }
405 /* Sets internal flags correctly for a given language. */
407 set_lang (pfile, lang)
411 const struct lang_flags *l = &lang_defaults[(int) lang];
413 CPP_OPTION (pfile, lang) = lang;
415 CPP_OPTION (pfile, c99) = l->c99;
416 CPP_OPTION (pfile, cplusplus) = l->cplusplus;
417 CPP_OPTION (pfile, extended_numbers) = l->extended_numbers;
418 CPP_OPTION (pfile, std) = l->std;
419 CPP_OPTION (pfile, trigraphs) = l->std;
420 CPP_OPTION (pfile, dollars_in_ident) = l->dollars_in_ident;
421 CPP_OPTION (pfile, cplusplus_comments) = l->cplusplus_comments;
422 CPP_OPTION (pfile, digraphs) = l->digraphs;
426 static int opt_comp PARAMS ((const void *, const void *));
428 /* Run-time sorting of options array. */
433 return strcmp (((struct cl_option *) p1)->opt_text,
434 ((struct cl_option *) p2)->opt_text);
438 /* init initializes library global state. It might not need to
439 do anything depending on the platform and compiler. */
443 static int initialized = 0;
450 /* For non-ASCII hosts, the cl_options array needs to be sorted at
452 qsort (cl_options, N_OPTS, sizeof (struct cl_option), opt_comp);
455 /* Set up the trigraph map. This doesn't need to do anything if
456 we were compiled with a compiler that supports C99 designated
458 init_trigraph_map ();
462 /* Initialize a cpp_reader structure. */
464 cpp_create_reader (lang)
469 /* Initialise this instance of the library if it hasn't been already. */
472 pfile = (cpp_reader *) xcalloc (1, sizeof (cpp_reader));
474 set_lang (pfile, lang);
475 CPP_OPTION (pfile, warn_import) = 1;
476 CPP_OPTION (pfile, warn_multichar) = 1;
477 CPP_OPTION (pfile, discard_comments) = 1;
478 CPP_OPTION (pfile, discard_comments_in_macro_exp) = 1;
479 CPP_OPTION (pfile, show_column) = 1;
480 CPP_OPTION (pfile, tabstop) = 8;
481 CPP_OPTION (pfile, operator_names) = 1;
482 CPP_OPTION (pfile, warn_endif_labels) = 1;
484 CPP_OPTION (pfile, pending) =
485 (struct cpp_pending *) xcalloc (1, sizeof (struct cpp_pending));
487 /* Default CPP arithmetic to something sensible for the host for the
488 benefit of dumb users like fix-header. */
489 CPP_OPTION (pfile, precision) = CHAR_BIT * sizeof (long);
490 CPP_OPTION (pfile, char_precision) = CHAR_BIT;
491 CPP_OPTION (pfile, wchar_precision) = CHAR_BIT * sizeof (int);
492 CPP_OPTION (pfile, int_precision) = CHAR_BIT * sizeof (int);
493 CPP_OPTION (pfile, unsigned_char) = 0;
494 CPP_OPTION (pfile, unsigned_wchar) = 1;
496 /* It's simplest to just create this struct whether or not it will
498 pfile->deps = deps_init ();
500 /* Initialise the line map. Start at logical line 1, so we can use
501 a line number of zero for special states. */
502 init_line_maps (&pfile->line_maps);
505 /* Initialize lexer state. */
506 pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments);
508 /* Set up static tokens. */
509 pfile->avoid_paste.type = CPP_PADDING;
510 pfile->avoid_paste.val.source = NULL;
511 pfile->eof.type = CPP_EOF;
512 pfile->eof.flags = 0;
514 /* Create a token buffer for the lexer. */
515 _cpp_init_tokenrun (&pfile->base_run, 250);
516 pfile->cur_run = &pfile->base_run;
517 pfile->cur_token = pfile->base_run.base;
519 /* Initialise the base context. */
520 pfile->context = &pfile->base_context;
521 pfile->base_context.macro = 0;
522 pfile->base_context.prev = pfile->base_context.next = 0;
524 /* Aligned and unaligned storage. */
525 pfile->a_buff = _cpp_get_buff (pfile, 0);
526 pfile->u_buff = _cpp_get_buff (pfile, 0);
528 /* The expression parser stack. */
529 _cpp_expand_op_stack (pfile);
531 /* Initialise the buffer obstack. */
532 gcc_obstack_init (&pfile->buffer_ob);
534 _cpp_init_includes (pfile);
539 /* Free resources used by PFILE. Accessing PFILE after this function
540 returns leads to undefined behaviour. Returns the error count. */
546 struct search_path *dir, *dirn;
547 cpp_context *context, *contextn;
548 tokenrun *run, *runn;
550 free_chain (CPP_OPTION (pfile, pending)->include_head);
551 free (CPP_OPTION (pfile, pending));
552 free (pfile->op_stack);
554 while (CPP_BUFFER (pfile) != NULL)
555 _cpp_pop_buffer (pfile);
558 free (pfile->out.base);
560 if (pfile->macro_buffer)
562 free ((PTR) pfile->macro_buffer);
563 pfile->macro_buffer = NULL;
564 pfile->macro_buffer_len = 0;
567 deps_free (pfile->deps);
568 obstack_free (&pfile->buffer_ob, 0);
570 _cpp_destroy_hashtable (pfile);
571 _cpp_cleanup_includes (pfile);
573 _cpp_free_buff (pfile->a_buff);
574 _cpp_free_buff (pfile->u_buff);
575 _cpp_free_buff (pfile->free_buffs);
577 for (run = &pfile->base_run; run; run = runn)
581 if (run != &pfile->base_run)
585 for (dir = CPP_OPTION (pfile, quote_include); dir; dir = dirn)
588 free ((PTR) dir->name);
592 for (context = pfile->base_context.next; context; context = contextn)
594 contextn = context->next;
598 free_line_maps (&pfile->line_maps);
600 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.
609 There are two tables of these. builtin_array holds all the
610 "builtin" macros: these are handled by builtin_macro() in
611 cppmacro.c. Builtin is somewhat of a misnomer -- the property of
612 interest is that these macros require special code to compute their
613 expansions. The value is a "builtin_type" enumerator.
615 operator_array holds the C++ named operators. These are keywords
616 which act as aliases for punctuators. In C++, they cannot be
617 altered through #define, and #if recognizes them as operators. In
618 C, these are not entered into the hash table at all (but see
619 <iso646.h>). The value is a token-type enumerator. */
624 unsigned short value;
627 #define B(n, t) { DSC(n), t }
628 static const struct builtin builtin_array[] =
630 B("__TIME__", BT_TIME),
631 B("__DATE__", BT_DATE),
632 B("__FILE__", BT_FILE),
633 B("__BASE_FILE__", BT_BASE_FILE),
634 B("__LINE__", BT_SPECLINE),
635 B("__INCLUDE_LEVEL__", BT_INCLUDE_LEVEL),
636 /* Keep builtins not used for -traditional-cpp at the end, and
637 update init_builtins() if any more are added. */
638 B("_Pragma", BT_PRAGMA),
639 B("__STDC__", BT_STDC),
642 static const struct builtin operator_array[] =
644 B("and", CPP_AND_AND),
645 B("and_eq", CPP_AND_EQ),
646 B("bitand", CPP_AND),
648 B("compl", CPP_COMPL),
650 B("not_eq", CPP_NOT_EQ),
652 B("or_eq", CPP_OR_EQ),
654 B("xor_eq", CPP_XOR_EQ)
658 /* Mark the C++ named operators in the hash table. */
660 mark_named_operators (pfile)
663 const struct builtin *b;
665 for (b = operator_array;
666 b < (operator_array + ARRAY_SIZE (operator_array));
669 cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len);
670 hp->flags |= NODE_OPERATOR;
671 hp->value.operator = b->value;
675 /* Subroutine of cpp_read_main_file; reads the builtins table above and
676 enters them, and language-specific macros, into the hash table. */
678 init_builtins (pfile)
681 const struct builtin *b;
682 size_t n = ARRAY_SIZE (builtin_array);
684 if (CPP_OPTION (pfile, traditional))
687 for(b = builtin_array; b < builtin_array + n; b++)
689 cpp_hashnode *hp = cpp_lookup (pfile, b->name, b->len);
691 hp->flags |= NODE_BUILTIN | NODE_WARN;
692 hp->value.builtin = b->value;
695 if (CPP_OPTION (pfile, cplusplus))
696 _cpp_define_builtin (pfile, "__cplusplus 1");
697 else if (CPP_OPTION (pfile, lang) == CLK_ASM)
698 _cpp_define_builtin (pfile, "__ASSEMBLER__ 1");
699 else if (CPP_OPTION (pfile, lang) == CLK_STDC94)
700 _cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L");
701 else if (CPP_OPTION (pfile, c99))
702 _cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L");
704 if (CPP_OPTION (pfile, objc))
705 _cpp_define_builtin (pfile, "__OBJC__ 1");
707 if (pfile->cb.register_builtins)
708 (*pfile->cb.register_builtins) (pfile);
711 /* And another subroutine. This one sets up the standard include path. */
713 init_standard_includes (pfile)
717 const struct default_include *p;
718 const char *specd_prefix = CPP_OPTION (pfile, include_prefix);
720 /* Several environment variables may add to the include search path.
721 CPATH specifies an additional list of directories to be searched
722 as if specified with -I, while C_INCLUDE_PATH, CPLUS_INCLUDE_PATH,
723 etc. specify an additional list of directories to be searched as
724 if specified with -isystem, for the language indicated. */
726 GET_ENVIRONMENT (path, "CPATH");
727 if (path != 0 && *path != 0)
728 path_include (pfile, path, BRACKET);
730 switch ((CPP_OPTION (pfile, objc) << 1) + CPP_OPTION (pfile, cplusplus))
733 GET_ENVIRONMENT (path, "C_INCLUDE_PATH");
736 GET_ENVIRONMENT (path, "CPLUS_INCLUDE_PATH");
739 GET_ENVIRONMENT (path, "OBJC_INCLUDE_PATH");
742 GET_ENVIRONMENT (path, "OBJCPLUS_INCLUDE_PATH");
745 if (path != 0 && *path != 0)
746 path_include (pfile, path, SYSTEM);
748 /* Search "translated" versions of GNU directories.
749 These have /usr/local/lib/gcc... replaced by specd_prefix. */
750 if (specd_prefix != 0 && cpp_GCC_INCLUDE_DIR_len)
752 /* Remove the `include' from /usr/local/lib/gcc.../include.
753 GCC_INCLUDE_DIR will always end in /include. */
754 int default_len = cpp_GCC_INCLUDE_DIR_len;
755 char *default_prefix = (char *) alloca (default_len + 1);
756 int specd_len = strlen (specd_prefix);
758 memcpy (default_prefix, cpp_GCC_INCLUDE_DIR, default_len);
759 default_prefix[default_len] = '\0';
761 for (p = cpp_include_defaults; p->fname; p++)
763 /* Some standard dirs are only for C++. */
765 || (CPP_OPTION (pfile, cplusplus)
766 && !CPP_OPTION (pfile, no_standard_cplusplus_includes)))
768 /* Does this dir start with the prefix? */
769 if (!memcmp (p->fname, default_prefix, default_len))
771 /* Yes; change prefix and add to search list. */
772 int flen = strlen (p->fname);
773 int this_len = specd_len + flen - default_len;
774 char *str = (char *) xmalloc (this_len + 1);
775 memcpy (str, specd_prefix, specd_len);
776 memcpy (str + specd_len,
777 p->fname + default_len,
778 flen - default_len + 1);
780 append_include_chain (pfile, str, SYSTEM, p->cxx_aware);
786 /* Search ordinary names for GNU include directories. */
787 for (p = cpp_include_defaults; p->fname; p++)
789 /* Some standard dirs are only for C++. */
791 || (CPP_OPTION (pfile, cplusplus)
792 && !CPP_OPTION (pfile, no_standard_cplusplus_includes)))
794 char *str = update_path (p->fname, p->component);
795 append_include_chain (pfile, str, SYSTEM, p->cxx_aware);
800 /* Pushes a command line -imacro and -include file indicated by P onto
801 the buffer stack. Returns non-zero if successful. */
803 push_include (pfile, p)
805 struct pending_option *p;
809 /* Later: maybe update this to use the #include "" search path
810 if cpp_read_file fails. */
811 header.type = CPP_STRING;
812 header.val.str.text = (const unsigned char *) p->arg;
813 header.val.str.len = strlen (p->arg);
814 /* Make the command line directive take up a line. */
817 return _cpp_execute_include (pfile, &header, IT_CMDLINE);
820 /* Frees a pending_option chain. */
823 struct pending_option *head;
825 struct pending_option *next;
835 /* Sanity-checks are dependent on command-line options, so it is
836 called as a subroutine of cpp_read_main_file (). */
838 static void sanity_checks PARAMS ((cpp_reader *));
839 static void sanity_checks (pfile)
843 size_t max_precision = 2 * CHAR_BIT * sizeof (cpp_num_part);
845 /* Sanity checks for assumptions about CPP arithmetic and target
846 type precisions made by cpplib. */
849 cpp_error (pfile, DL_ICE, "cppchar_t must be an unsigned type");
851 if (CPP_OPTION (pfile, precision) > max_precision)
852 cpp_error (pfile, DL_ICE,
853 "preprocessor arithmetic has maximum precision of %lu bits; target requires %lu bits",
854 (unsigned long) max_precision,
855 (unsigned long) CPP_OPTION (pfile, precision));
857 if (CPP_OPTION (pfile, precision) < CPP_OPTION (pfile, int_precision))
858 cpp_error (pfile, DL_ICE,
859 "CPP arithmetic must be at least as precise as a target int");
861 if (CPP_OPTION (pfile, char_precision) < 8)
862 cpp_error (pfile, DL_ICE, "target char is less than 8 bits wide");
864 if (CPP_OPTION (pfile, wchar_precision) < CPP_OPTION (pfile, char_precision))
865 cpp_error (pfile, DL_ICE,
866 "target wchar_t is narrower than target char");
868 if (CPP_OPTION (pfile, int_precision) < CPP_OPTION (pfile, char_precision))
869 cpp_error (pfile, DL_ICE,
870 "target int is narrower than target char");
872 /* This is assumed in eval_token() and could be fixed if necessary. */
873 if (sizeof (cppchar_t) > sizeof (cpp_num_part))
874 cpp_error (pfile, DL_ICE, "CPP half-integer narrower than CPP character");
876 if (CPP_OPTION (pfile, wchar_precision) > BITS_PER_CPPCHAR_T)
877 cpp_error (pfile, DL_ICE,
878 "CPP on this host cannot handle wide character constants over %lu bits, but the target requires %lu bits",
879 (unsigned long) BITS_PER_CPPCHAR_T,
880 (unsigned long) CPP_OPTION (pfile, wchar_precision));
883 # define sanity_checks(PFILE)
886 /* This is called after options have been parsed, and partially
887 processed. Setup for processing input from the file named FNAME,
888 or stdin if it is the empty string. Return the original filename
889 on success (e.g. foo.i->foo.c), or NULL on failure. */
891 cpp_read_main_file (pfile, fname, table)
896 sanity_checks (pfile);
898 /* The front ends don't set up the hash table until they have
899 finished processing the command line options, so initializing the
900 hashtable is deferred until now. */
901 _cpp_init_hashtable (pfile, table);
903 /* Set up the include search path now. */
904 if (! CPP_OPTION (pfile, no_standard_includes))
905 init_standard_includes (pfile);
907 merge_include_chains (pfile);
909 /* With -v, print the list of dirs to search. */
910 if (CPP_OPTION (pfile, verbose))
912 struct search_path *l;
913 fprintf (stderr, _("#include \"...\" search starts here:\n"));
914 for (l = CPP_OPTION (pfile, quote_include); l; l = l->next)
916 if (l == CPP_OPTION (pfile, bracket_include))
917 fprintf (stderr, _("#include <...> search starts here:\n"));
918 fprintf (stderr, " %s\n", l->name);
920 fprintf (stderr, _("End of search list.\n"));
923 if (CPP_OPTION (pfile, print_deps))
924 /* Set the default target (if there is none already). */
925 deps_add_default_target (pfile->deps, fname);
927 /* Open the main input file. */
928 if (!_cpp_read_file (pfile, fname))
931 /* Set this after cpp_post_options so the client can change the
932 option if it wishes, and after stacking the main file so we don't
933 trace the main file. */
934 pfile->line_maps.trace_includes = CPP_OPTION (pfile, print_include_names);
936 /* For foo.i, read the original filename foo.c now, for the benefit
937 of the front ends. */
938 if (CPP_OPTION (pfile, preprocessed))
939 read_original_filename (pfile);
940 /* Overlay an empty buffer to seed traditional preprocessing. */
941 else if (CPP_OPTION (pfile, traditional)
942 && !CPP_OPTION (pfile, preprocess_only))
943 _cpp_overlay_buffer (pfile, U"", 0);
945 return pfile->map->to_file;
948 /* For preprocessed files, if the first tokens are of the form # NUM.
949 handle the directive so we know the original file name. This will
950 generate file_change callbacks, which the front ends must handle
951 appropriately given their state of initialization. */
953 read_original_filename (pfile)
956 const cpp_token *token, *token1;
958 /* Lex ahead; if the first tokens are of the form # NUM, then
959 process the directive, otherwise back up. */
960 token = _cpp_lex_direct (pfile);
961 if (token->type == CPP_HASH)
963 token1 = _cpp_lex_direct (pfile);
964 _cpp_backup_tokens (pfile, 1);
966 /* If it's a #line directive, handle it. */
967 if (token1->type == CPP_NUMBER)
969 _cpp_handle_directive (pfile, token->flags & PREV_WHITE);
974 /* Backup as if nothing happened. */
975 _cpp_backup_tokens (pfile, 1);
978 /* Handle pending command line options: -D, -U, -A, -imacros and
979 -include. This should be called after debugging has been properly
980 set up in the front ends. */
982 cpp_finish_options (pfile)
985 /* Mark named operators before handling command line macros. */
986 if (CPP_OPTION (pfile, cplusplus) && CPP_OPTION (pfile, operator_names))
987 mark_named_operators (pfile);
989 /* Install builtins and process command line macros etc. in the order
990 they appeared, but only if not already preprocessed. */
991 if (! CPP_OPTION (pfile, preprocessed))
993 struct pending_option *p;
995 _cpp_do_file_change (pfile, LC_RENAME, _("<built-in>"), 1, 0);
996 init_builtins (pfile);
997 _cpp_do_file_change (pfile, LC_RENAME, _("<command line>"), 1, 0);
998 for (p = CPP_OPTION (pfile, pending)->directive_head; p; p = p->next)
999 (*p->handler) (pfile, p->arg);
1001 /* Scan -imacros files after -D, -U, but before -include.
1002 pfile->next_include_file is NULL, so _cpp_pop_buffer does not
1003 push -include files. */
1004 for (p = CPP_OPTION (pfile, pending)->imacros_head; p; p = p->next)
1005 if (push_include (pfile, p))
1006 cpp_scan_nooutput (pfile);
1008 pfile->next_include_file = &CPP_OPTION (pfile, pending)->include_head;
1009 _cpp_maybe_push_include_file (pfile);
1012 pfile->first_unused_line = pfile->line;
1014 free_chain (CPP_OPTION (pfile, pending)->imacros_head);
1015 free_chain (CPP_OPTION (pfile, pending)->directive_head);
1018 /* Push the next buffer on the stack given by -include, if any. */
1020 _cpp_maybe_push_include_file (pfile)
1023 if (pfile->next_include_file)
1025 struct pending_option *head = *pfile->next_include_file;
1027 while (head && !push_include (pfile, head))
1031 pfile->next_include_file = &head->next;
1034 /* All done; restore the line map from <command line>. */
1035 _cpp_do_file_change (pfile, LC_RENAME,
1036 pfile->line_maps.maps[0].to_file, 1, 0);
1037 /* Don't come back here again. */
1038 pfile->next_include_file = NULL;
1043 /* Use mkdeps.c to output dependency information. */
1048 /* Stream on which to print the dependency information. */
1049 FILE *deps_stream = 0;
1050 const char *const deps_mode =
1051 CPP_OPTION (pfile, print_deps_append) ? "a" : "w";
1053 if (CPP_OPTION (pfile, deps_file)[0] == '\0')
1054 deps_stream = stdout;
1057 deps_stream = fopen (CPP_OPTION (pfile, deps_file), deps_mode);
1058 if (deps_stream == 0)
1060 cpp_errno (pfile, DL_ERROR, CPP_OPTION (pfile, deps_file));
1065 deps_write (pfile->deps, deps_stream, 72);
1067 if (CPP_OPTION (pfile, deps_phony_targets))
1068 deps_phony_targets (pfile->deps, deps_stream);
1070 /* Don't close stdout. */
1071 if (deps_stream != stdout)
1073 if (ferror (deps_stream) || fclose (deps_stream) != 0)
1074 cpp_error (pfile, DL_ERROR, "I/O error on output");
1078 /* This is called at the end of preprocessing. It pops the
1079 last buffer and writes dependency output. It should also
1080 clear macro definitions, such that you could call cpp_start_read
1081 with a new filename to restart processing. */
1086 /* Warn about unused macros before popping the final buffer. */
1087 if (CPP_OPTION (pfile, warn_unused_macros))
1088 cpp_forall_identifiers (pfile, _cpp_warn_if_unused_macro, NULL);
1090 /* cpplex.c leaves the final buffer on the stack. This it so that
1091 it returns an unending stream of CPP_EOFs to the client. If we
1092 popped the buffer, we'd dereference a NULL buffer pointer and
1093 segfault. It's nice to allow the client to do worry-free excess
1094 cpp_get_token calls. */
1095 while (pfile->buffer)
1096 _cpp_pop_buffer (pfile);
1098 /* Don't write the deps file if preprocessing has failed. */
1099 if (CPP_OPTION (pfile, print_deps) && pfile->errors == 0)
1100 output_deps (pfile);
1102 /* Report on headers that could use multiple include guards. */
1103 if (CPP_OPTION (pfile, print_include_names))
1104 _cpp_report_missing_guards (pfile);
1107 /* Add a directive to be handled later in the initialization phase. */
1109 new_pending_directive (pend, text, handler)
1110 struct cpp_pending *pend;
1112 cl_directive_handler handler;
1114 struct pending_option *o = (struct pending_option *)
1115 xmalloc (sizeof (struct pending_option));
1119 o->handler = handler;
1120 APPEND (pend, directive, o);
1123 /* Irix6 "cc -n32" and OSF4 cc have problems with char foo[] = ("string");
1124 I.e. a const string initializer with parens around it. That is
1125 what N_("string") resolves to, so we make no_* be macros instead. */
1126 #define no_arg N_("argument missing after %s")
1127 #define no_ass N_("assertion missing after %s")
1128 #define no_dir N_("directory name missing after %s")
1129 #define no_fil N_("file name missing after %s")
1130 #define no_mac N_("macro name missing after %s")
1131 #define no_pth N_("path name missing after %s")
1132 #define no_num N_("number missing after %s")
1133 #define no_tgt N_("target missing after %s")
1135 /* This is the list of all command line options, with the leading
1136 "-" removed. It must be sorted in ASCII collating order. */
1137 #define COMMAND_LINE_OPTIONS \
1138 DEF_OPT("A", no_ass, OPT_A) \
1139 DEF_OPT("D", no_mac, OPT_D) \
1140 DEF_OPT("I", no_dir, OPT_I) \
1141 DEF_OPT("M", 0, OPT_M) \
1142 DEF_OPT("MD", no_fil, OPT_MD) \
1143 DEF_OPT("MF", no_fil, OPT_MF) \
1144 DEF_OPT("MG", 0, OPT_MG) \
1145 DEF_OPT("MM", 0, OPT_MM) \
1146 DEF_OPT("MMD", no_fil, OPT_MMD) \
1147 DEF_OPT("MP", 0, OPT_MP) \
1148 DEF_OPT("MQ", no_tgt, OPT_MQ) \
1149 DEF_OPT("MT", no_tgt, OPT_MT) \
1150 DEF_OPT("U", no_mac, OPT_U) \
1151 DEF_OPT("idirafter", no_dir, OPT_idirafter) \
1152 DEF_OPT("imacros", no_fil, OPT_imacros) \
1153 DEF_OPT("include", no_fil, OPT_include) \
1154 DEF_OPT("iprefix", no_pth, OPT_iprefix) \
1155 DEF_OPT("isystem", no_dir, OPT_isystem) \
1156 DEF_OPT("iwithprefix", no_dir, OPT_iwithprefix) \
1157 DEF_OPT("iwithprefixbefore", no_dir, OPT_iwithprefixbefore) \
1158 DEF_OPT("lang-asm", 0, OPT_lang_asm) \
1159 DEF_OPT("lang-c", 0, OPT_lang_c) \
1160 DEF_OPT("lang-c++", 0, OPT_lang_cplusplus) \
1161 DEF_OPT("lang-c89", 0, OPT_lang_c89) \
1162 DEF_OPT("lang-objc", 0, OPT_lang_objc) \
1163 DEF_OPT("o", no_fil, OPT_o) \
1164 DEF_OPT("remap", 0, OPT_remap) \
1165 DEF_OPT("std=c++98", 0, OPT_std_cplusplus98) \
1166 DEF_OPT("std=c89", 0, OPT_std_c89) \
1167 DEF_OPT("std=c99", 0, OPT_std_c99) \
1168 DEF_OPT("std=c9x", 0, OPT_std_c9x) \
1169 DEF_OPT("std=gnu89", 0, OPT_std_gnu89) \
1170 DEF_OPT("std=gnu99", 0, OPT_std_gnu99) \
1171 DEF_OPT("std=gnu9x", 0, OPT_std_gnu9x) \
1172 DEF_OPT("std=iso9899:1990", 0, OPT_std_iso9899_1990) \
1173 DEF_OPT("std=iso9899:199409", 0, OPT_std_iso9899_199409) \
1174 DEF_OPT("std=iso9899:1999", 0, OPT_std_iso9899_1999) \
1175 DEF_OPT("std=iso9899:199x", 0, OPT_std_iso9899_199x)
1177 #define DEF_OPT(text, msg, code) code,
1180 COMMAND_LINE_OPTIONS
1187 const char *opt_text;
1190 enum opt_code opt_code;
1193 #define DEF_OPT(text, msg, code) { text, msg, sizeof(text) - 1, code },
1195 static struct cl_option cl_options[] =
1197 static const struct cl_option cl_options[] =
1200 COMMAND_LINE_OPTIONS
1203 #undef COMMAND_LINE_OPTIONS
1205 /* Perform a binary search to find which, if any, option the given
1206 command-line matches. Returns its index in the option array,
1207 negative on failure. Complications arise since some options can be
1208 suffixed with an argument, and multiple complete matches can occur,
1209 e.g. -pedantic and -pedantic-errors. */
1211 parse_option (input)
1214 unsigned int md, mn, mx;
1225 opt_len = cl_options[md].opt_len;
1226 comp = memcmp (input, cl_options[md].opt_text, opt_len);
1234 if (input[opt_len] == '\0')
1236 /* We were passed more text. If the option takes an argument,
1237 we may match a later option or we may have been passed the
1238 argument. The longest possible option match succeeds.
1239 If the option takes no arguments we have not matched and
1240 continue the search (e.g. input="stdc++" match was "stdc"). */
1242 if (cl_options[md].msg)
1244 /* Scan forwards. If we get an exact match, return it.
1245 Otherwise, return the longest option-accepting match.
1246 This loops no more than twice with current options. */
1248 for (; mn < (unsigned int) N_OPTS; mn++)
1250 opt_len = cl_options[mn].opt_len;
1251 if (memcmp (input, cl_options[mn].opt_text, opt_len))
1253 if (input[opt_len] == '\0')
1255 if (cl_options[mn].msg)
1266 /* Handle one command-line option in (argc, argv).
1267 Can be called multiple times, to handle multiple sets of options.
1268 Returns number of strings consumed. */
1270 cpp_handle_option (pfile, argc, argv)
1276 struct cpp_pending *pend = CPP_OPTION (pfile, pending);
1278 /* Interpret "-" or a non-option as a file name. */
1279 if (argv[i][0] != '-' || argv[i][1] == '\0')
1281 if (CPP_OPTION (pfile, in_fname) == NULL)
1282 CPP_OPTION (pfile, in_fname) = argv[i];
1283 else if (CPP_OPTION (pfile, out_fname) == NULL)
1284 CPP_OPTION (pfile, out_fname) = argv[i];
1286 cpp_error (pfile, DL_ERROR,
1287 "too many filenames. Type %s --help for usage info",
1292 enum opt_code opt_code;
1294 const char *arg = 0;
1296 /* Skip over '-'. */
1297 opt_index = parse_option (&argv[i][1]);
1301 opt_code = cl_options[opt_index].opt_code;
1302 if (cl_options[opt_index].msg)
1304 arg = &argv[i][cl_options[opt_index].opt_len + 1];
1310 cpp_error (pfile, DL_ERROR,
1311 cl_options[opt_index].msg, argv[i - 1]);
1319 case N_OPTS: /* Shut GCC up. */
1323 new_pending_directive (pend, arg, cpp_define);
1326 CPP_OPTION (pfile, remap) = 1;
1329 CPP_OPTION (pfile, include_prefix) = arg;
1330 CPP_OPTION (pfile, include_prefix_len) = strlen (arg);
1333 set_lang (pfile, CLK_GNUC89);
1335 case OPT_lang_cplusplus:
1336 set_lang (pfile, CLK_GNUCXX);
1339 CPP_OPTION (pfile, objc) = 1;
1342 set_lang (pfile, CLK_ASM);
1344 case OPT_std_cplusplus98:
1345 set_lang (pfile, CLK_CXX98);
1348 set_lang (pfile, CLK_GNUC89);
1352 set_lang (pfile, CLK_GNUC99);
1354 case OPT_std_iso9899_199409:
1355 set_lang (pfile, CLK_STDC94);
1357 case OPT_std_iso9899_1990:
1360 set_lang (pfile, CLK_STDC89);
1362 case OPT_std_iso9899_199x:
1363 case OPT_std_iso9899_1999:
1366 set_lang (pfile, CLK_STDC99);
1369 if (CPP_OPTION (pfile, out_fname) == NULL)
1370 CPP_OPTION (pfile, out_fname) = arg;
1373 cpp_error (pfile, DL_ERROR, "output filename specified twice");
1379 CPP_OPTION (pfile, print_deps_missing_files) = 1;
1382 /* When doing dependencies with -M or -MM, suppress normal
1383 preprocessed output, but still do -dM etc. as software
1384 depends on this. Preprocessed output occurs if -MD, -MMD
1385 or environment var dependency generation is used. */
1386 CPP_OPTION (pfile, print_deps) = 2;
1387 CPP_OPTION (pfile, no_output) = 1;
1388 CPP_OPTION (pfile, inhibit_warnings) = 1;
1391 CPP_OPTION (pfile, print_deps) = 1;
1392 CPP_OPTION (pfile, no_output) = 1;
1393 CPP_OPTION (pfile, inhibit_warnings) = 1;
1396 CPP_OPTION (pfile, deps_file) = arg;
1399 CPP_OPTION (pfile, deps_phony_targets) = 1;
1403 /* Add a target. -MQ quotes for Make. */
1404 deps_add_target (pfile->deps, arg, opt_code == OPT_MQ);
1408 CPP_OPTION (pfile, print_deps) = 2;
1409 CPP_OPTION (pfile, deps_file) = arg;
1412 CPP_OPTION (pfile, print_deps) = 1;
1413 CPP_OPTION (pfile, deps_file) = arg;
1419 /* -A with an argument beginning with '-' acts as
1420 #unassert on whatever immediately follows the '-'.
1421 If "-" is the whole argument, we eliminate all
1422 predefined macros and assertions, including those
1423 that were specified earlier on the command line.
1424 That way we can get rid of any that were passed
1425 automatically in from GCC. */
1429 free_chain (pend->directive_head);
1430 pend->directive_head = NULL;
1431 pend->directive_tail = NULL;
1434 new_pending_directive (pend, arg + 1, cpp_unassert);
1437 new_pending_directive (pend, arg, cpp_assert);
1440 new_pending_directive (pend, arg, cpp_undef);
1442 case OPT_I: /* Add directory to path for includes. */
1443 if (!strcmp (arg, "-"))
1446 Use the preceding -I directories for #include "..."
1447 but not #include <...>.
1448 Don't search the directory of the present file
1449 for #include "...". (Note that -I. -I- is not the same as
1450 the default setup; -I. uses the compiler's working dir.) */
1451 if (! CPP_OPTION (pfile, ignore_srcdir))
1453 pend->quote_head = pend->brack_head;
1454 pend->quote_tail = pend->brack_tail;
1455 pend->brack_head = 0;
1456 pend->brack_tail = 0;
1457 CPP_OPTION (pfile, ignore_srcdir) = 1;
1461 cpp_error (pfile, DL_ERROR, "-I- specified twice");
1466 append_include_chain (pfile, xstrdup (arg), BRACKET, 0);
1469 /* Add directory to beginning of system include path, as a system
1470 include directory. */
1471 append_include_chain (pfile, xstrdup (arg), SYSTEM, 0);
1476 struct pending_option *o = (struct pending_option *)
1477 xmalloc (sizeof (struct pending_option));
1481 if (opt_code == OPT_include)
1482 APPEND (pend, include, o);
1484 APPEND (pend, imacros, o);
1487 case OPT_iwithprefix:
1488 /* Add directory to end of path for includes,
1489 with the default prefix at the front of its name. */
1491 case OPT_iwithprefixbefore:
1492 /* Add directory to main path for includes,
1493 with the default prefix at the front of its name. */
1500 if (CPP_OPTION (pfile, include_prefix) != 0)
1502 size_t ipl = CPP_OPTION (pfile, include_prefix_len);
1503 fname = xmalloc (ipl + len + 1);
1504 memcpy (fname, CPP_OPTION (pfile, include_prefix), ipl);
1505 memcpy (fname + ipl, arg, len + 1);
1507 else if (cpp_GCC_INCLUDE_DIR_len)
1509 fname = xmalloc (cpp_GCC_INCLUDE_DIR_len + len + 1);
1510 memcpy (fname, cpp_GCC_INCLUDE_DIR, cpp_GCC_INCLUDE_DIR_len);
1511 memcpy (fname + cpp_GCC_INCLUDE_DIR_len, arg, len + 1);
1514 fname = xstrdup (arg);
1516 append_include_chain (pfile, fname,
1517 opt_code == OPT_iwithprefix ? SYSTEM: BRACKET, 0);
1521 /* Add directory to end of path for includes. */
1522 append_include_chain (pfile, xstrdup (arg), AFTER, 0);
1529 /* Handle command-line options in (argc, argv).
1530 Can be called multiple times, to handle multiple sets of options.
1531 Returns if an unrecognized option is seen.
1532 Returns number of strings consumed. */
1534 cpp_handle_options (pfile, argc, argv)
1540 int strings_processed;
1542 for (i = 0; i < argc; i += strings_processed)
1544 strings_processed = cpp_handle_option (pfile, argc - i, argv + i);
1545 if (strings_processed == 0)
1552 /* Extra processing when all options are parsed, after all calls to
1553 cpp_handle_option[s]. Consistency checks etc. */
1555 cpp_post_options (pfile)
1558 /* Canonicalize in_fname and out_fname. We guarantee they are not
1559 NULL, and that the empty string represents stdin / stdout. */
1560 if (CPP_OPTION (pfile, in_fname) == NULL
1561 || !strcmp (CPP_OPTION (pfile, in_fname), "-"))
1562 CPP_OPTION (pfile, in_fname) = "";
1564 if (CPP_OPTION (pfile, out_fname) == NULL
1565 || !strcmp (CPP_OPTION (pfile, out_fname), "-"))
1566 CPP_OPTION (pfile, out_fname) = "";
1568 /* -Wtraditional is not useful in C++ mode. */
1569 if (CPP_OPTION (pfile, cplusplus))
1570 CPP_OPTION (pfile, warn_traditional) = 0;
1572 /* The compiler front ends override this, but I think this is the
1573 appropriate setting for the library. */
1574 CPP_OPTION (pfile, warn_long_long)
1575 = ((CPP_OPTION (pfile, pedantic) && !CPP_OPTION (pfile, c99))
1576 || CPP_OPTION (pfile, warn_traditional));
1578 /* Permanently disable macro expansion if we are rescanning
1579 preprocessed text. Read preprocesed source in ISO mode. */
1580 if (CPP_OPTION (pfile, preprocessed))
1582 pfile->state.prevent_expansion = 1;
1583 CPP_OPTION (pfile, traditional) = 0;
1586 /* Traditional CPP does not accurately track column information. */
1587 if (CPP_OPTION (pfile, traditional))
1588 CPP_OPTION (pfile, show_column) = 0;
1590 /* -dM and dependencies suppress normal output; do it here so that
1591 the last -d[MDN] switch overrides earlier ones. */
1592 if (CPP_OPTION (pfile, dump_macros) == dump_only)
1593 CPP_OPTION (pfile, no_output) = 1;
1595 /* Disable -dD, -dN and -dI if normal output is suppressed. Allow
1596 -dM since at least glibc relies on -M -dM to work. */
1597 if (CPP_OPTION (pfile, no_output))
1599 if (CPP_OPTION (pfile, dump_macros) != dump_only)
1600 CPP_OPTION (pfile, dump_macros) = dump_none;
1601 CPP_OPTION (pfile, dump_includes) = 0;
1604 /* Intialize, and check environment variables for, dependency
1606 init_dependency_output (pfile);
1608 /* If we're not outputting dependencies, complain if other -M
1609 options have been given. */
1610 if (!CPP_OPTION (pfile, print_deps)
1611 && (CPP_OPTION (pfile, print_deps_missing_files)
1612 || CPP_OPTION (pfile, deps_file)
1613 || CPP_OPTION (pfile, deps_phony_targets)))
1614 cpp_error (pfile, DL_ERROR,
1615 "you must additionally specify either -M or -MM");
1618 /* Set up dependency-file output. On exit, if print_deps is non-zero
1619 then deps_file is not NULL; stdout is the empty string. */
1621 init_dependency_output (pfile)
1624 char *spec, *s, *output_file;
1626 /* Either of two environment variables can specify output of deps.
1627 Its value is either "OUTPUT_FILE" or "OUTPUT_FILE DEPS_TARGET",
1628 where OUTPUT_FILE is the file to write deps info to
1629 and DEPS_TARGET is the target to mention in the deps. */
1631 if (CPP_OPTION (pfile, print_deps) == 0)
1633 spec = getenv ("DEPENDENCIES_OUTPUT");
1635 CPP_OPTION (pfile, print_deps) = 1;
1638 spec = getenv ("SUNPRO_DEPENDENCIES");
1640 CPP_OPTION (pfile, print_deps) = 2;
1645 /* Find the space before the DEPS_TARGET, if there is one. */
1646 s = strchr (spec, ' ');
1649 /* Let the caller perform MAKE quoting. */
1650 deps_add_target (pfile->deps, s + 1, 0);
1651 output_file = (char *) xmalloc (s - spec + 1);
1652 memcpy (output_file, spec, s - spec);
1653 output_file[s - spec] = 0;
1658 /* Command line -MF overrides environment variables and default. */
1659 if (CPP_OPTION (pfile, deps_file) == 0)
1660 CPP_OPTION (pfile, deps_file) = output_file;
1662 CPP_OPTION (pfile, print_deps_append) = 1;
1664 else if (CPP_OPTION (pfile, deps_file) == 0)
1665 /* If -M or -MM was seen without -MF, default output to wherever
1666 was specified with -o. out_fname is non-NULL here. */
1667 CPP_OPTION (pfile, deps_file) = CPP_OPTION (pfile, out_fname);