2 Copyright (C) 1986, 87, 89, 92-98, 1999 Free Software Foundation, Inc.
3 Contributed by Per Bothner, 1994-95.
4 Based on CCCP program by Paul Rubin, June 1986
5 Adapted to ANSI C, Richard Stallman, Jan 1987
7 This program is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by the
9 Free Software Foundation; either version 2, or (at your option) any
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
31 /* XXX Should be in a header file. */
32 extern char *version_string;
34 /* Predefined symbols, built-in macros, and the default include path. */
36 #ifndef GET_ENV_PATH_LIST
37 #define GET_ENV_PATH_LIST(VAR,NAME) do { (VAR) = getenv (NAME); } while (0)
40 /* By default, colon separates directories in a path. */
41 #ifndef PATH_SEPARATOR
42 #define PATH_SEPARATOR ':'
45 #ifndef STANDARD_INCLUDE_DIR
46 #define STANDARD_INCLUDE_DIR "/usr/include"
49 /* We let tm.h override the types used here, to handle trivial differences
50 such as the choice of unsigned int or long unsigned int for size_t.
51 When machines start needing nontrivial differences in the size type,
52 it would be best to do something here to figure out automatically
53 from other information what type to use. */
55 /* The string value for __SIZE_TYPE__. */
58 #define SIZE_TYPE "long unsigned int"
61 /* The string value for __PTRDIFF_TYPE__. */
64 #define PTRDIFF_TYPE "long int"
67 /* The string value for __WCHAR_TYPE__. */
70 #define WCHAR_TYPE "int"
72 #define CPP_WCHAR_TYPE(PFILE) \
73 (CPP_OPTIONS (PFILE)->cplusplus ? "__wchar_t" : WCHAR_TYPE)
75 /* The string value for __USER_LABEL_PREFIX__ */
77 #ifndef USER_LABEL_PREFIX
78 #define USER_LABEL_PREFIX ""
81 /* The string value for __REGISTER_PREFIX__ */
83 #ifndef REGISTER_PREFIX
84 #define REGISTER_PREFIX ""
87 /* Suffix for object files, and known input-file extensions. */
88 static const char * const known_suffixes[] =
90 ".c", ".C", ".s", ".S", ".m",
91 ".cc", ".cxx", ".cpp", ".cp", ".c++",
97 # define OBJECT_SUFFIX ".obj"
99 # define OBJECT_SUFFIX ".o"
104 /* This is the default list of directories to search for include files.
105 It may be overridden by the various -I and -ixxx options.
107 #include "file" looks in the same directory as the current file,
109 #include <file> just looks in this list.
111 All these directories are treated as `system' include directories
112 (they are not subject to pedantic warnings in some cases). */
114 static struct default_include
116 const char *fname; /* The name of the directory. */
117 const char *component; /* The component containing the directory
118 (see update_path in prefix.c) */
119 int cplusplus; /* Only look here if we're compiling C++. */
120 int cxx_aware; /* Includes in this directory don't need to
121 be wrapped in extern "C" when compiling
122 C++. This is not used anymore. */
124 include_defaults_array[]
125 #ifdef INCLUDE_DEFAULTS
129 /* Pick up GNU C++ specific include files. */
130 { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1 },
132 /* This is the dir for fixincludes. Put it just before
133 the files that we fix. */
134 { GCC_INCLUDE_DIR, "GCC", 0, 0 },
135 /* For cross-compilation, this dir name is generated
136 automatically in Makefile.in. */
137 { CROSS_INCLUDE_DIR, "GCC", 0, 0 },
138 #ifdef TOOL_INCLUDE_DIR
139 /* This is another place that the target system's headers might be. */
140 { TOOL_INCLUDE_DIR, "BINUTILS", 0, 1 },
142 #else /* not CROSS_COMPILE */
143 #ifdef LOCAL_INCLUDE_DIR
144 /* This should be /usr/local/include and should come before
145 the fixincludes-fixed header files. */
146 { LOCAL_INCLUDE_DIR, 0, 0, 1 },
148 #ifdef TOOL_INCLUDE_DIR
149 /* This is here ahead of GCC_INCLUDE_DIR because assert.h goes here.
150 Likewise, behind LOCAL_INCLUDE_DIR, where glibc puts its assert.h. */
151 { TOOL_INCLUDE_DIR, "BINUTILS", 0, 1 },
153 /* This is the dir for fixincludes. Put it just before
154 the files that we fix. */
155 { GCC_INCLUDE_DIR, "GCC", 0, 0 },
156 /* Some systems have an extra dir of include files. */
157 #ifdef SYSTEM_INCLUDE_DIR
158 { SYSTEM_INCLUDE_DIR, 0, 0, 0 },
160 #ifndef STANDARD_INCLUDE_COMPONENT
161 #define STANDARD_INCLUDE_COMPONENT 0
163 { STANDARD_INCLUDE_DIR, STANDARD_INCLUDE_COMPONENT, 0, 0 },
164 #endif /* not CROSS_COMPILE */
167 #endif /* no INCLUDE_DEFAULTS */
169 /* Internal structures and prototypes. */
171 /* A `struct pending_option' remembers one -D, -A, -U, -include, or -imacros
172 switch. There are four lists: one for -D and -U, one for -A, one
173 for -include, one for -imacros. `undef' is set for -U, clear for
174 -D, ignored for the others.
175 (Future: add an equivalent of -U for -A) */
176 struct pending_option
178 struct pending_option *next;
184 #define APPEND(pend, list, elt) \
185 do { if (!(pend)->list##_head) (pend)->list##_head = (elt); \
186 else (pend)->list##_tail->next = (elt); \
187 (pend)->list##_tail = (elt); \
190 #define APPEND(pend, list, elt) \
191 do { if (!(pend)->list/**/_head) (pend)->list/**/_head = (elt); \
192 else (pend)->list/**/_tail->next = (elt); \
193 (pend)->list/**/_tail = (elt); \
197 static void print_help PARAMS ((void));
198 static void path_include PARAMS ((cpp_reader *,
199 struct cpp_pending *,
201 static void initialize_builtins PARAMS ((cpp_reader *));
202 static void append_include_chain PARAMS ((cpp_reader *,
203 struct cpp_pending *,
205 static char *base_name PARAMS ((const char *));
206 static void dump_special_to_buffer PARAMS ((cpp_reader *, const char *));
207 static void initialize_dependency_output PARAMS ((cpp_reader *));
209 /* Last argument to append_include_chain: chain to use */
210 enum { QUOTE = 0, BRACKET, SYSTEM, AFTER };
212 /* If gcc is in use (stage2/stage3) we can make this table initialized data. */
214 #define CAT(a, b) a##b
216 #define CAT(a, b) a/**/b
219 #if (GCC_VERSION >= 2007)
220 #define TABLE(id) static inline void CAT(init_, id) PARAMS ((void)) {} \
221 unsigned char id[256] = {
222 #define s(p, v) [p] = v,
225 #define TABLE(id) unsigned char id[256] = { 0 }; \
226 static void CAT(init_,id) PARAMS ((void)) { \
227 unsigned char *x = id;
228 #define s(p, v) x[p] = v;
232 #define A(x) s(x, ISidnum|ISidstart)
233 #define N(x) s(x, ISidnum|ISnumstart)
234 #define H(x) s(x, IShspace|ISspace)
235 #define S(x) s(x, ISspace)
240 A('a') A('b') A('c') A('d') A('e') A('f') A('g') A('h') A('i')
241 A('j') A('k') A('l') A('m') A('n') A('o') A('p') A('q') A('r')
242 A('s') A('t') A('u') A('v') A('w') A('x') A('y') A('z')
244 A('A') A('B') A('C') A('D') A('E') A('F') A('G') A('H') A('I')
245 A('J') A('K') A('L') A('M') A('N') A('O') A('P') A('Q') A('R')
246 A('S') A('T') A('U') A('V') A('W') A('X') A('Y') A('Z')
248 N('1') N('2') N('3') N('4') N('5') N('6') N('7') N('8') N('9') N('0')
250 H(' ') H('\t') H('\v') H('\f')
264 /* Given a colon-separated list of file names PATH,
265 add all the names to the search path for include files. */
268 path_include (pfile, pend, list, path)
270 struct cpp_pending *pend;
280 /* Find the end of this name. */
282 while (*q != 0 && *q != PATH_SEPARATOR) q++;
285 /* An empty name in the path stands for the current directory. */
286 name = (char *) xmalloc (2);
292 /* Otherwise use the directory that is named. */
293 name = (char *) xmalloc (q - p + 1);
294 memcpy (name, p, q - p);
298 append_include_chain (pfile, pend, name, path);
300 /* Advance past this name. */
308 /* Find the base name of a (partial) pathname FNAME.
309 Returns a pointer into the string passed in.
310 Accepts Unix (/-separated) paths on all systems,
311 DOS and VMS paths on those systems. */
316 char *s = (char *)fname;
318 #if defined (HAVE_DOS_BASED_FILE_SYSTEM)
319 if (ISALPHA (s[0]) && s[1] == ':') s += 2;
320 if ((p = rindex (s, '\\'))) s = p + 1;
322 if ((p = rindex (s, ':'))) s = p + 1; /* Skip device. */
323 if ((p = rindex (s, ']'))) s = p + 1; /* Skip directory. */
324 if ((p = rindex (s, '>'))) s = p + 1; /* Skip alternate (int'n'l) dir. */
326 if ((p = rindex (s, '/'))) s = p + 1;
331 /* Append DIR to include path PATH. DIR must be permanently allocated
334 append_include_chain (pfile, pend, dir, path)
336 struct cpp_pending *pend;
340 struct file_name_list *new;
344 simplify_pathname (dir);
347 /* Dirs that don't exist are silently ignored. */
349 cpp_perror_with_name (pfile, dir);
350 else if (CPP_OPTIONS (pfile)->verbose)
351 cpp_notice ("ignoring nonexistent directory `%s'\n", dir);
355 if (!S_ISDIR (st.st_mode))
357 cpp_message (pfile, 1, "%s: %s: Not a directory", progname, dir);
362 if (len > pfile->max_include_len)
363 pfile->max_include_len = len;
365 new = (struct file_name_list *)xmalloc (sizeof (struct file_name_list));
368 new->ino = st.st_ino;
369 new->dev = st.st_dev;
370 new->sysp = (path == SYSTEM);
371 new->name_map = NULL;
377 case QUOTE: APPEND (pend, quote, new); break;
378 case BRACKET: APPEND (pend, brack, new); break;
379 case SYSTEM: APPEND (pend, systm, new); break;
380 case AFTER: APPEND (pend, after, new); break;
385 /* Write out a #define command for the special named MACRO_NAME
386 to PFILE's token_buffer. */
389 dump_special_to_buffer (pfile, macro_name)
391 const char *macro_name;
393 static char define_directive[] = "#define ";
394 int macro_name_length = strlen (macro_name);
395 output_line_command (pfile, same_file);
396 CPP_RESERVE (pfile, sizeof(define_directive) + macro_name_length);
397 CPP_PUTS_Q (pfile, define_directive, sizeof(define_directive)-1);
398 CPP_PUTS_Q (pfile, macro_name, macro_name_length);
399 CPP_PUTC_Q (pfile, ' ');
400 cpp_expand_to_buffer (pfile, macro_name, macro_name_length);
401 CPP_PUTC (pfile, '\n');
404 /* Initialize a cpp_options structure. */
406 cpp_options_init (opts)
409 bzero ((char *) opts, sizeof (struct cpp_options));
411 opts->dollars_in_ident = 1;
412 opts->cplusplus_comments = 1;
413 opts->warn_import = 1;
416 (struct cpp_pending *) xcalloc (1, sizeof (struct cpp_pending));
419 /* Initialize a cpp_reader structure. */
421 cpp_reader_init (pfile)
424 bzero ((char *) pfile, sizeof (cpp_reader));
426 pfile->get_token = cpp_get_token;
429 pfile->token_buffer_size = 200;
430 pfile->token_buffer = (U_CHAR *) xmalloc (pfile->token_buffer_size);
431 CPP_SET_WRITTEN (pfile, 0);
433 pfile->hashtab = (HASHNODE **) xcalloc (HASHSIZE, sizeof (HASHNODE *));
436 /* Free resources used by PFILE.
437 This is the cpp_reader 'finalizer' or 'destructor' (in C++ terminology). */
443 while (CPP_BUFFER (pfile) != CPP_NULL_BUFFER (pfile))
444 cpp_pop_buffer (pfile);
446 if (pfile->token_buffer)
448 free (pfile->token_buffer);
449 pfile->token_buffer = NULL;
452 if (pfile->deps_buffer)
454 free (pfile->deps_buffer);
455 pfile->deps_buffer = NULL;
456 pfile->deps_allocated_size = 0;
459 if (pfile->input_buffer)
461 free (pfile->input_buffer);
462 free (pfile->input_speccase);
463 pfile->input_buffer = pfile->input_speccase = NULL;
464 pfile->input_buffer_len = 0;
467 while (pfile->if_stack)
469 IF_STACK_FRAME *temp = pfile->if_stack;
470 pfile->if_stack = temp->next;
474 for (i = ALL_INCLUDE_HASHSIZE; --i >= 0; )
476 struct include_hash *imp = pfile->all_include_files[i];
479 struct include_hash *next = imp->next;
481 /* This gets freed elsewhere - I think. */
487 pfile->all_include_files[i] = 0;
490 for (i = HASHSIZE; --i >= 0;)
492 while (pfile->hashtab[i])
493 delete_macro (pfile->hashtab[i]);
495 free (pfile->hashtab);
499 /* This structure defines one built-in macro. A node of type TYPE will
500 be entered in the macro hash table under the name NAME, with value
501 VALUE (if any). FLAGS tweaks the behavior a little:
502 DUMP write debug info for this macro
503 STDC define only if not -traditional
504 C89 define only if -lang-c89
505 C9X define only if -lang-c9x
506 ULP value is the global user_label_prefix (which can't be
507 put directly into the table).
515 unsigned short flags;
523 static const struct builtin builtin_array[] =
525 { "__TIME__", 0, T_TIME, DUMP },
526 { "__DATE__", 0, T_DATE, DUMP },
527 { "__FILE__", 0, T_FILE, 0 },
528 { "__BASE_FILE__", 0, T_BASE_FILE, DUMP },
529 { "__LINE__", 0, T_SPECLINE, 0 },
530 { "__INCLUDE_LEVEL__", 0, T_INCLUDE_LEVEL, 0 },
531 { "__VERSION__", 0, T_VERSION, DUMP },
532 { "__STDC__", 0, T_STDC, DUMP|STDC },
534 { "__USER_LABEL_PREFIX__", 0, T_CONST, ULP },
535 { "__REGISTER_PREFIX__", REGISTER_PREFIX, T_CONST, 0 },
536 { "__HAVE_BUILTIN_SETJMP__", "1", T_CONST, 0 },
537 #ifndef NO_BUILTIN_SIZE_TYPE
538 { "__SIZE_TYPE__", SIZE_TYPE, T_CONST, DUMP },
540 #ifndef NO_BUILTIN_PTRDIFF_TYPE
541 { "__PTRDIFF_TYPE__", PTRDIFF_TYPE, T_CONST, DUMP },
543 { "__WCHAR_TYPE__", WCHAR_TYPE, T_CONST, DUMP },
544 { "__STDC_VERSION__", "199409L", T_CONST, DUMP|STDC|C89 },
545 { "__STDC_VERSION__", "199909L", T_CONST, DUMP|STDC|C9X },
549 /* Subroutine of cpp_start_read; reads the builtins table above and
550 enters the macros into the hash table. */
553 initialize_builtins (pfile)
557 const struct builtin *b;
559 for(b = builtin_array; b->name; b++)
561 if ((b->flags & STDC) && CPP_TRADITIONAL (pfile))
563 if ((b->flags & C89) && CPP_OPTIONS (pfile)->c9x)
565 if ((b->flags & C9X) && !CPP_OPTIONS (pfile)->c9x)
568 val = (b->flags & ULP) ? user_label_prefix : b->value;
569 len = strlen (b->name);
571 cpp_install (pfile, b->name, len, b->type, val, -1);
572 if ((b->flags & DUMP) && CPP_OPTIONS (pfile)->debug_output)
573 dump_special_to_buffer (pfile, b->name);
583 /* Another subroutine of cpp_start_read. This one sets up to do
584 dependency-file output. */
586 initialize_dependency_output (pfile)
589 cpp_options *opts = CPP_OPTIONS (pfile);
590 char *spec, *s, *output_file;
592 /* Either of two environment variables can specify output of deps.
593 Its value is either "OUTPUT_FILE" or "OUTPUT_FILE DEPS_TARGET",
594 where OUTPUT_FILE is the file to write deps info to
595 and DEPS_TARGET is the target to mention in the deps. */
597 if (opts->print_deps == 0)
599 spec = getenv ("DEPENDENCIES_OUTPUT");
601 opts->print_deps = 1;
604 spec = getenv ("SUNPRO_DEPENDENCIES");
606 opts->print_deps = 2;
611 /* Find the space before the DEPS_TARGET, if there is one. */
612 s = strchr (spec, ' ');
615 opts->deps_target = s + 1;
616 output_file = (char *) xmalloc (s - spec + 1);
617 memcpy (output_file, spec, s - spec);
618 output_file[s - spec] = 0;
622 opts->deps_target = 0;
626 opts->deps_file = output_file;
627 opts->print_deps_append = 1;
630 /* Print the expected object file name as the target of this Make-rule. */
631 pfile->deps_allocated_size = 200;
632 pfile->deps_buffer = (char *) xmalloc (pfile->deps_allocated_size);
633 pfile->deps_buffer[0] = 0;
634 pfile->deps_size = 0;
635 pfile->deps_column = 0;
637 if (opts->deps_target)
638 deps_output (pfile, opts->deps_target, ':');
639 else if (*opts->in_fname == 0)
640 deps_output (pfile, "-", ':');
646 /* Discard all directory prefixes from filename. */
647 q = base_name (opts->in_fname);
649 /* Copy remainder to mungable area. */
651 p = (char *) alloca (len + 8);
654 /* Output P, but remove known suffixes. */
656 /* Point to the filename suffix. */
658 /* Compare against the known suffixes. */
659 for (x = 0; known_suffixes[x]; x++)
661 if (strncmp (known_suffixes[x], r, q - r) == 0)
663 /* Make q point to the bit we're going to overwrite
664 with an object suffix. */
670 /* Supply our own suffix. */
671 strcpy (q, OBJECT_SUFFIX);
673 deps_output (pfile, p, ':');
674 deps_output (pfile, opts->in_fname, ' ');
678 /* This is called after options have been processed.
679 * Check options for consistency, and setup for processing input
680 * from the file named FNAME. (Use standard input if FNAME==NULL.)
681 * Return 1 on success, 0 on failure.
685 cpp_start_read (pfile, fname)
689 struct cpp_options *opts = CPP_OPTIONS (pfile);
690 struct pending_option *p, *q;
693 struct include_hash *ih_fake;
695 /* -MG doesn't select the form of output and must be specified with one of
696 -M or -MM. -MG doesn't make sense with -MD or -MMD since they don't
697 inhibit compilation. */
698 if (opts->print_deps_missing_files
699 && (opts->print_deps == 0 || !opts->no_output))
701 cpp_fatal (pfile, "-MG must be specified with one of -M or -MM");
705 /* Chill should not be used with -trigraphs. */
706 if (opts->chill && opts->trigraphs)
708 cpp_warning (pfile, "-lang-chill and -trigraphs are mutually exclusive");
712 /* Set this if it hasn't been set already. */
713 if (user_label_prefix == NULL)
714 user_label_prefix = USER_LABEL_PREFIX;
716 /* Now that we know dollars_in_ident, we can initialize the syntax
719 /* XXX Get rid of code that depends on this, then IStable can
721 if (opts->dollars_in_ident)
722 IStable['$'] = ISidstart|ISidnum;
724 /* Do partial setup of input buffer for the sake of generating
725 early #line directives (when -g is in effect). */
726 fp = cpp_push_buffer (pfile, NULL, 0);
729 if (opts->in_fname == NULL || *opts->in_fname == 0)
731 opts->in_fname = fname;
732 if (opts->in_fname == NULL)
735 fp->nominal_fname = fp->fname = opts->in_fname;
738 /* Install __LINE__, etc. Must follow initialize_char_syntax
739 and option processing. */
740 initialize_builtins (pfile);
742 /* Do -U's, -D's and -A's in the order they were seen. */
743 p = opts->pending->define_head;
746 if (opts->debug_output)
747 output_line_command (pfile, same_file);
749 cpp_undef (pfile, p->arg);
751 cpp_define (pfile, p->arg);
758 p = opts->pending->assert_head;
761 if (opts->debug_output)
762 output_line_command (pfile, same_file);
764 cpp_unassert (pfile, p->arg);
766 cpp_assert (pfile, p->arg);
773 opts->done_initializing = 1;
775 /* Several environment variables may add to the include search path.
776 CPATH specifies an additional list of directories to be searched
777 as if specified with -I, while C_INCLUDE_PATH, CPLUS_INCLUDE_PATH,
778 etc. specify an additional list of directories to be searched as
779 if specified with -isystem, for the language indicated.
781 These variables are ignored if -nostdinc is on. */
782 if (! opts->no_standard_includes)
785 GET_ENV_PATH_LIST (path, "CPATH");
786 if (path != 0 && *path != 0)
787 path_include (pfile, opts->pending, path, BRACKET);
789 switch ((opts->objc << 1) + opts->cplusplus)
792 GET_ENV_PATH_LIST (path, "C_INCLUDE_PATH");
795 GET_ENV_PATH_LIST (path, "CPLUS_INCLUDE_PATH");
798 GET_ENV_PATH_LIST (path, "OBJC_INCLUDE_PATH");
801 GET_ENV_PATH_LIST (path, "OBJCPLUS_INCLUDE_PATH");
804 if (path != 0 && *path != 0)
805 path_include (pfile, opts->pending, path, SYSTEM);
808 /* Unless -nostdinc, add the compiled-in include path to the list,
809 translating prefixes. */
810 if (!opts->no_standard_includes)
812 struct default_include *p = include_defaults_array;
813 char *specd_prefix = opts->include_prefix;
815 /* Search "translated" versions of GNU directories.
816 These have /usr/local/lib/gcc... replaced by specd_prefix. */
817 if (specd_prefix != 0)
819 char *default_prefix = alloca (sizeof GCC_INCLUDE_DIR - 7);
820 /* Remove the `include' from /usr/local/lib/gcc.../include.
821 GCC_INCLUDE_DIR will always end in /include. */
822 int default_len = sizeof GCC_INCLUDE_DIR - 8;
823 int specd_len = strlen (specd_prefix);
825 default_len = sizeof GCC_INCLUDE_DIR - 8;
826 memcpy (default_prefix, GCC_INCLUDE_DIR, default_len);
827 default_prefix[default_len] = '\0';
829 for (p = include_defaults_array; p->fname; p++)
831 /* Some standard dirs are only for C++. */
834 && !opts->no_standard_cplusplus_includes))
836 /* Does this dir start with the prefix? */
837 if (!strncmp (p->fname, default_prefix, default_len))
839 /* Yes; change prefix and add to search list. */
840 int flen = strlen (p->fname);
841 int this_len = specd_len + flen - default_len;
842 char *str = (char *) xmalloc (this_len + 1);
843 memcpy (str, specd_prefix, specd_len);
844 memcpy (str + specd_len,
845 p->fname + default_len,
846 flen - default_len + 1);
848 append_include_chain (pfile, opts->pending,
855 /* Search ordinary names for GNU include directories. */
856 for (p = include_defaults_array; p->fname; p++)
858 /* Some standard dirs are only for C++. */
861 && !opts->no_standard_cplusplus_includes))
863 /* XXX Potential memory leak! */
864 char *str = xstrdup (update_path (p->fname, p->component));
865 append_include_chain (pfile, opts->pending, str, SYSTEM);
870 merge_include_chains (opts);
872 /* With -v, print the list of dirs to search. */
875 struct file_name_list *p;
876 cpp_message (pfile, -1, "#include \"...\" search starts here:\n");
877 for (p = opts->quote_include; p; p = p->next)
879 if (p == opts->bracket_include)
880 cpp_message (pfile, -1, "#include <...> search starts here:\n");
881 fprintf (stderr, " %s\n", p->name);
883 cpp_message (pfile, -1, "End of search list.\n");
886 /* Don't bother trying to do macro expansion if we've already done
888 if (opts->preprocessed)
889 pfile->no_macro_expand++;
891 /* Open the main input file.
892 We do this in nonblocking mode so we don't get stuck here if
893 someone clever has asked cpp to process /dev/rmt0;
894 finclude() will check that we have a real file to work with. */
895 if (fname == NULL || *fname == 0)
900 else if ((f = open (fname, O_RDONLY|O_NONBLOCK|O_NOCTTY, 0666)) < 0)
901 cpp_pfatal_with_name (pfile, fname);
903 initialize_dependency_output (pfile);
905 /* Must call finclude() on the main input before processing
906 -include switches; otherwise the -included text winds up
907 after the main input. */
908 ih_fake = (struct include_hash *) xmalloc (sizeof (struct include_hash));
910 ih_fake->next_this_file = 0;
911 ih_fake->foundhere = ABSOLUTE_PATH; /* well sort of ... */
912 ih_fake->name = fname;
913 ih_fake->control_macro = 0;
914 ih_fake->buf = (char *)-1;
916 if (!finclude (pfile, f, ih_fake))
918 if (opts->preprocessed)
919 /* If we've already processed this code, we want to trust the #line
920 directives in the input. But we still need to update our line
921 counter accordingly. */
922 pfile->lineno = CPP_BUFFER (pfile)->lineno;
924 output_line_command (pfile, same_file);
925 pfile->only_seen_white = 2;
927 /* The -imacros files can be scanned now, but the -include files
928 have to be pushed onto the include stack and processed later,
929 in the main loop calling cpp_get_token. */
931 pfile->no_record_file++;
933 p = opts->pending->imacros_head;
936 int fd = open (p->arg, O_RDONLY|O_NONBLOCK|O_NOCTTY, 0666);
939 cpp_perror_with_name (pfile, p->arg);
942 if (!cpp_push_buffer (pfile, NULL, 0))
945 ih_fake = (struct include_hash *)
946 xmalloc (sizeof (struct include_hash));
948 ih_fake->next_this_file = 0;
949 ih_fake->foundhere = ABSOLUTE_PATH; /* well sort of ... */
950 ih_fake->name = p->arg;
951 ih_fake->control_macro = 0;
952 ih_fake->buf = (char *)-1;
954 if (finclude (pfile, fd, ih_fake))
956 if (CPP_PRINT_DEPS (pfile))
957 deps_output (pfile, ih_fake->name, ' ');
959 cpp_scan_buffer (pfile);
962 cpp_pop_buffer (pfile);
972 p = opts->pending->include_head;
975 int fd = open (p->arg, O_RDONLY|O_NONBLOCK|O_NOCTTY, 0666);
978 cpp_perror_with_name (pfile, p->arg);
981 if (!cpp_push_buffer (pfile, NULL, 0))
984 ih_fake = (struct include_hash *)
985 xmalloc (sizeof (struct include_hash));
987 ih_fake->next_this_file = 0;
988 ih_fake->foundhere = ABSOLUTE_PATH; /* well sort of ... */
989 ih_fake->name = p->arg;
990 ih_fake->control_macro = 0;
991 ih_fake->buf = (char *)-1;
993 if (finclude (pfile, fd, ih_fake))
995 if (CPP_PRINT_DEPS (pfile))
996 deps_output (pfile, ih_fake->name, ' ');
998 output_line_command (pfile, enter_file);
1001 cpp_pop_buffer (pfile);
1006 pfile->no_record_file--;
1008 free (opts->pending);
1009 opts->pending = NULL;
1014 /* This is called at the end of preprocessing. It pops the
1015 last buffer and writes dependency output. It should also
1016 clear macro definitions, such that you could call cpp_start_read
1017 with a new filename to restart processing. */
1022 struct cpp_options *opts = CPP_OPTIONS (pfile);
1024 if (CPP_PREV_BUFFER (CPP_BUFFER (pfile)) != CPP_NULL_BUFFER (pfile))
1026 "cpplib internal error: buffers still stacked in cpp_finish");
1027 cpp_pop_buffer (pfile);
1029 if (opts->print_deps)
1031 /* Stream on which to print the dependency information. */
1034 /* Don't actually write the deps file if compilation has failed. */
1035 if (pfile->errors == 0)
1037 const char *deps_mode = opts->print_deps_append ? "a" : "w";
1038 if (opts->deps_file == 0)
1039 deps_stream = stdout;
1040 else if ((deps_stream = fopen (opts->deps_file, deps_mode)) == 0)
1041 cpp_pfatal_with_name (pfile, opts->deps_file);
1042 fputs (pfile->deps_buffer, deps_stream);
1043 putc ('\n', deps_stream);
1044 if (opts->deps_file)
1046 if (ferror (deps_stream) || fclose (deps_stream) != 0)
1047 cpp_fatal (pfile, "I/O error on output");
1052 if (opts->dump_macros == dump_only)
1057 for (i = HASHSIZE; --i >= 0;)
1059 for (h = pfile->hashtab[i]; h; h = h->next)
1060 if (h->type == T_MACRO)
1062 m.defn = h->value.defn;
1064 m.symlen = h->length;
1065 dump_definition (pfile, m);
1066 CPP_PUTC (pfile, '\n');
1073 new_pending_define (opts, text)
1074 struct cpp_options *opts;
1077 struct pending_option *o = (struct pending_option *)
1078 xmalloc (sizeof (struct pending_option));
1083 APPEND (opts->pending, define, o);
1086 /* Handle one command-line option in (argc, argv).
1087 Can be called multiple times, to handle multiple sets of options.
1088 Returns number of strings consumed. */
1090 cpp_handle_option (pfile, argc, argv)
1095 struct cpp_options *opts = CPP_OPTIONS (pfile);
1098 if (argv[i][0] != '-')
1100 if (opts->out_fname != NULL)
1103 cpp_fatal (pfile, "Too many arguments");
1105 else if (opts->in_fname != NULL)
1106 opts->out_fname = argv[i];
1108 opts->in_fname = argv[i];
1114 if (!strcmp (argv[i], "-fleading-underscore"))
1115 user_label_prefix = "_";
1116 else if (!strcmp (argv[i], "-fno-leading-underscore"))
1117 user_label_prefix = "";
1118 else if (!strcmp (argv[i], "-fpreprocessed"))
1119 opts->preprocessed = 1;
1120 else if (!strcmp (argv[i], "-fno-preprocessed"))
1121 opts->preprocessed = 0;
1128 case 'I': /* Add directory to path for includes. */
1129 if (!strcmp (argv[i] + 2, "-"))
1132 Use the preceding -I directories for #include "..."
1133 but not #include <...>.
1134 Don't search the directory of the present file
1135 for #include "...". (Note that -I. -I- is not the same as
1136 the default setup; -I. uses the compiler's working dir.) */
1137 if (! opts->ignore_srcdir)
1139 opts->ignore_srcdir = 1;
1140 opts->pending->quote_head = opts->pending->brack_head;
1141 opts->pending->quote_tail = opts->pending->brack_tail;
1142 opts->pending->brack_head = 0;
1143 opts->pending->brack_tail = 0;
1147 cpp_fatal (pfile, "-I- specified twice");
1154 if (argv[i][2] != 0)
1155 fname = argv[i] + 2;
1156 else if (i + 1 == argc)
1157 goto missing_dirname;
1160 append_include_chain (pfile, opts->pending,
1161 xstrdup (fname), BRACKET);
1166 /* Add directory to beginning of system include path, as a system
1167 include directory. */
1168 if (!strcmp (argv[i], "-isystem"))
1171 goto missing_filename;
1172 append_include_chain (pfile, opts->pending,
1173 xstrdup (argv[++i]), SYSTEM);
1175 else if (!strcmp (argv[i], "-include"))
1178 goto missing_filename;
1181 struct pending_option *o = (struct pending_option *)
1182 xmalloc (sizeof (struct pending_option));
1185 /* This list has to be built in reverse order so that
1186 when cpp_start_read pushes all the -include files onto
1187 the buffer stack, they will be scanned in forward order. */
1188 o->next = opts->pending->include_head;
1189 opts->pending->include_head = o;
1192 else if (!strcmp (argv[i], "-imacros"))
1195 goto missing_filename;
1198 struct pending_option *o = (struct pending_option *)
1199 xmalloc (sizeof (struct pending_option));
1203 APPEND (opts->pending, imacros, o);
1206 /* Add directory to end of path for includes,
1207 with the default prefix at the front of its name. */
1208 else if (!strcmp (argv[i], "-iwithprefix"))
1213 goto missing_dirname;
1215 len = strlen (argv[i]);
1217 if (opts->include_prefix != 0)
1219 fname = xmalloc (opts->include_prefix_len + len + 1);
1220 memcpy (fname, opts->include_prefix, opts->include_prefix_len);
1221 memcpy (fname + opts->include_prefix_len, argv[i], len + 1);
1225 fname = xmalloc (sizeof GCC_INCLUDE_DIR - 8 + len);
1226 memcpy (fname, GCC_INCLUDE_DIR, sizeof GCC_INCLUDE_DIR - 9);
1227 memcpy (fname + sizeof GCC_INCLUDE_DIR - 9, argv[i], len + 1);
1230 append_include_chain (pfile, opts->pending, fname, SYSTEM);
1232 /* Add directory to main path for includes,
1233 with the default prefix at the front of its name. */
1234 else if (!strcmp (argv[i], "-iwithprefixbefore"))
1239 goto missing_dirname;
1241 len = strlen (argv[i]);
1243 if (opts->include_prefix != 0)
1245 fname = xmalloc (opts->include_prefix_len + len + 1);
1246 memcpy (fname, opts->include_prefix, opts->include_prefix_len);
1247 memcpy (fname + opts->include_prefix_len, argv[i], len + 1);
1251 fname = xmalloc (sizeof GCC_INCLUDE_DIR - 8 + len);
1252 memcpy (fname, GCC_INCLUDE_DIR, sizeof GCC_INCLUDE_DIR - 9);
1253 memcpy (fname + sizeof GCC_INCLUDE_DIR - 9, argv[i], len + 1);
1256 append_include_chain (pfile, opts->pending, fname, BRACKET);
1258 /* Add directory to end of path for includes. */
1259 else if (!strcmp (argv[i], "-idirafter"))
1262 goto missing_dirname;
1263 append_include_chain (pfile, opts->pending,
1264 xstrdup (argv[++i]), AFTER);
1266 else if (!strcmp (argv[i], "-iprefix"))
1269 goto missing_filename;
1272 opts->include_prefix = argv[++i];
1273 opts->include_prefix_len = strlen (argv[i]);
1276 else if (!strcmp (argv[i], "-ifoutput"))
1277 opts->output_conditionals = 1;
1282 if (opts->out_fname != NULL)
1284 cpp_fatal (pfile, "Output filename specified twice");
1288 goto missing_filename;
1289 opts->out_fname = argv[++i];
1290 if (!strcmp (opts->out_fname, "-"))
1291 opts->out_fname = "";
1295 if (!strcmp (argv[i], "-pedantic"))
1296 CPP_PEDANTIC (pfile) = 1;
1297 else if (!strcmp (argv[i], "-pedantic-errors"))
1299 CPP_PEDANTIC (pfile) = 1;
1300 opts->pedantic_errors = 1;
1303 else if (!strcmp (argv[i], "-pcp")) {
1304 char *pcp_fname = argv[++i];
1305 pcp_outfile = ((pcp_fname[0] != '-' || pcp_fname[1] != '\0')
1306 ? fopen (pcp_fname, "w")
1307 : fdopen (dup (fileno (stdout)), "w"));
1308 if (pcp_outfile == 0)
1309 cpp_pfatal_with_name (pfile, pcp_fname);
1316 if (!strcmp (argv[i], "-traditional"))
1318 opts->traditional = 1;
1319 opts->cplusplus_comments = 0;
1321 else if (!strcmp (argv[i], "-trigraphs"))
1322 opts->trigraphs = 1;
1326 if (! strcmp (argv[i], "-lang-c"))
1327 opts->cplusplus = 0, opts->cplusplus_comments = 1, opts->c89 = 0,
1328 opts->c9x = 1, opts->objc = 0;
1329 if (! strcmp (argv[i], "-lang-c89"))
1331 opts->cplusplus = 0, opts->cplusplus_comments = 0;
1332 opts->c89 = 1, opts->c9x = 0, opts->objc = 0;
1333 opts->trigraphs = 1;
1334 new_pending_define (opts, "__STRICT_ANSI__");
1336 if (! strcmp (argv[i], "-lang-c++"))
1337 opts->cplusplus = 1, opts->cplusplus_comments = 1, opts->c89 = 0,
1338 opts->c9x = 0, opts->objc = 0;
1339 if (! strcmp (argv[i], "-lang-objc"))
1340 opts->cplusplus = 0, opts->cplusplus_comments = 1, opts->c89 = 0,
1341 opts->c9x = 0, opts->objc = 1;
1342 if (! strcmp (argv[i], "-lang-objc++"))
1343 opts->cplusplus = 1, opts->cplusplus_comments = 1, opts->c89 = 0,
1344 opts->c9x = 0, opts->objc = 1;
1345 if (! strcmp (argv[i], "-lang-asm"))
1347 if (! strcmp (argv[i], "-lint"))
1349 if (! strcmp (argv[i], "-lang-chill"))
1350 opts->objc = 0, opts->cplusplus = 0, opts->chill = 1,
1351 opts->traditional = 1;
1355 opts->cplusplus = 1, opts->cplusplus_comments = 1;
1359 if (!strcmp (argv[i], "-std=gnu89"))
1361 opts->cplusplus = 0, opts->cplusplus_comments = 0;
1362 opts->c89 = 1, opts->c9x = 0, opts->objc = 0;
1364 else if (!strcmp (argv[i], "-std=gnu9x"))
1366 opts->cplusplus = 0, opts->cplusplus_comments = 1;
1367 opts->c89 = 0, opts->c9x = 1, opts->objc = 0;
1368 new_pending_define (opts, "__STDC_VERSION__=199901L");
1370 else if (!strcmp (argv[i], "-std=iso9899:1990")
1371 || !strcmp (argv[i], "-std=c89"))
1373 opts->cplusplus = 0, opts->cplusplus_comments = 0;
1374 opts->c89 = 1, opts->c9x = 0, opts->objc = 0;
1375 opts->trigraphs = 1;
1376 new_pending_define (opts, "__STRICT_ANSI__");
1378 else if (!strcmp (argv[i], "-std=iso9899:199409"))
1380 opts->cplusplus = 0, opts->cplusplus_comments = 0;
1381 opts->c89 = 1, opts->c9x = 0, opts->objc = 0;
1382 opts->trigraphs = 1;
1383 new_pending_define (opts, "__STRICT_ANSI__");
1384 new_pending_define (opts, "__STDC_VERSION__=199409L");
1386 else if (!strcmp (argv[i], "-std=iso9899:199x")
1387 || !strcmp (argv[i], "-std=iso9899:1999")
1388 || !strcmp (argv[i], "-std=c9x")
1389 || !strcmp (argv[i], "-std=c99"))
1391 opts->cplusplus = 0, opts->cplusplus_comments = 1;
1392 opts->c89 = 0, opts->c9x = 1, opts->objc = 0;
1393 opts->trigraphs = 1;
1394 new_pending_define (opts, "__STRICT_ANSI__");
1395 new_pending_define (opts, "__STDC_VERSION__=199901L");
1400 opts->inhibit_warnings = 1;
1404 if (!strcmp (argv[i], "-Wtrigraphs"))
1405 opts->warn_trigraphs = 1;
1406 else if (!strcmp (argv[i], "-Wno-trigraphs"))
1407 opts->warn_trigraphs = 0;
1408 else if (!strcmp (argv[i], "-Wcomment"))
1409 opts->warn_comments = 1;
1410 else if (!strcmp (argv[i], "-Wno-comment"))
1411 opts->warn_comments = 0;
1412 else if (!strcmp (argv[i], "-Wcomments"))
1413 opts->warn_comments = 1;
1414 else if (!strcmp (argv[i], "-Wno-comments"))
1415 opts->warn_comments = 0;
1416 else if (!strcmp (argv[i], "-Wtraditional"))
1417 opts->warn_stringify = 1;
1418 else if (!strcmp (argv[i], "-Wno-traditional"))
1419 opts->warn_stringify = 0;
1420 else if (!strcmp (argv[i], "-Wundef"))
1421 opts->warn_undef = 1;
1422 else if (!strcmp (argv[i], "-Wno-undef"))
1423 opts->warn_undef = 0;
1424 else if (!strcmp (argv[i], "-Wimport"))
1425 opts->warn_import = 1;
1426 else if (!strcmp (argv[i], "-Wno-import"))
1427 opts->warn_import = 0;
1428 else if (!strcmp (argv[i], "-Werror"))
1429 opts->warnings_are_errors = 1;
1430 else if (!strcmp (argv[i], "-Wno-error"))
1431 opts->warnings_are_errors = 0;
1432 else if (!strcmp (argv[i], "-Wall"))
1434 opts->warn_trigraphs = 1;
1435 opts->warn_comments = 1;
1440 /* The style of the choices here is a bit mixed.
1441 The chosen scheme is a hybrid of keeping all options in one string
1442 and specifying each option in a separate argument:
1443 -M|-MM|-MD file|-MMD file [-MG]. An alternative is:
1444 -M|-MM|-MD file|-MMD file|-MG|-MMG; or more concisely:
1445 -M[M][G][D file]. This is awkward to handle in specs, and is not
1447 /* ??? -MG must be specified in addition to one of -M or -MM.
1448 This can be relaxed in the future without breaking anything.
1449 The converse isn't true. */
1451 /* -MG isn't valid with -MD or -MMD. This is checked for later. */
1452 if (!strcmp (argv[i], "-MG"))
1454 opts->print_deps_missing_files = 1;
1457 if (!strcmp (argv[i], "-M"))
1458 opts->print_deps = 2;
1459 else if (!strcmp (argv[i], "-MM"))
1460 opts->print_deps = 1;
1461 else if (!strcmp (argv[i], "-MD"))
1462 opts->print_deps = 2;
1463 else if (!strcmp (argv[i], "-MMD"))
1464 opts->print_deps = 1;
1465 /* For -MD and -MMD options, write deps on file named by next arg. */
1466 if (!strcmp (argv[i], "-MD") || !strcmp (argv[i], "-MMD"))
1469 goto missing_filename;
1470 opts->deps_file = argv[++i];
1474 /* For -M and -MM, write deps on standard output
1475 and suppress the usual output. */
1476 opts->no_output = 1;
1482 char *p = argv[i] + 2;
1484 while ((c = *p++) != 0)
1486 /* Arg to -d specifies what parts of macros to dump */
1490 opts->dump_macros = dump_only;
1491 opts->no_output = 1;
1494 opts->dump_macros = dump_names;
1497 opts->dump_macros = dump_definitions;
1500 opts->dump_includes = 1;
1508 if (argv[i][2] == '3')
1509 opts->debug_output = 1;
1513 if (!strcmp (argv[i], "--help"))
1515 else if (!strcmp (argv[i], "--version"))
1516 cpp_notice ("GNU CPP version %s\n", version_string);
1521 cpp_notice ("GNU CPP version %s", version_string);
1522 #ifdef TARGET_VERSION
1525 fputc ('\n', stderr);
1530 opts->print_include_names = 1;
1536 if (argv[i][2] != 0)
1538 else if (i + 1 == argc)
1540 cpp_fatal (pfile, "Macro name missing after -D option");
1545 new_pending_define (opts, text);
1553 if (argv[i][2] != 0)
1555 else if (i + 1 == argc)
1557 cpp_fatal (pfile, "Assertion missing after -A option");
1563 if (strcmp (p, "-"))
1565 struct pending_option *o = (struct pending_option *)
1566 xmalloc (sizeof (struct pending_option));
1571 APPEND (opts->pending, assert, o);
1575 /* -A- eliminates all predefined macros and assertions.
1576 Let's include also any that were specified earlier
1577 on the command line. That way we can get rid of any
1578 that were passed automatically in from GCC. */
1579 struct pending_option *o1, *o2;
1581 o1 = opts->pending->define_head;
1588 o1 = opts->pending->assert_head;
1595 opts->pending->assert_head = NULL;
1596 opts->pending->assert_tail = NULL;
1597 opts->pending->define_head = NULL;
1598 opts->pending->define_tail = NULL;
1605 struct pending_option *o = (struct pending_option *)
1606 xmalloc (sizeof (struct pending_option));
1608 if (argv[i][2] != 0)
1609 o->arg = argv[i] + 2;
1610 else if (i + 1 == argc)
1612 cpp_fatal (pfile, "Macro name missing after -U option");
1620 APPEND (opts->pending, define, o);
1625 opts->put_out_comments = 1;
1628 case 'E': /* -E comes from cc -E; ignore it. */
1632 opts->no_line_commands = 1;
1635 case '$': /* Don't include $ in identifiers. */
1636 opts->dollars_in_ident = 0;
1640 if (!strcmp (argv[i], "-nostdinc"))
1641 /* -nostdinc causes no default include directories.
1642 You must specify all include-file directories with -I. */
1643 opts->no_standard_includes = 1;
1644 else if (!strcmp (argv[i], "-nostdinc++"))
1645 /* -nostdinc++ causes no default C++-specific include directories. */
1646 opts->no_standard_cplusplus_includes = 1;
1648 else if (!strcmp (argv[i], "-noprecomp"))
1654 if (!strcmp (argv[i], "-remap"))
1658 case '\0': /* JF handle '-' as file name meaning stdin or stdout */
1659 if (opts->in_fname == NULL)
1660 opts->in_fname = "";
1661 else if (opts->out_fname == NULL)
1662 opts->out_fname = "";
1664 return i; /* error */
1674 cpp_fatal (pfile, "Filename missing after `%s' option", argv[i]);
1677 cpp_fatal (pfile, "Directory name missing after `%s' option", argv[i]);
1681 /* Handle command-line options in (argc, argv).
1682 Can be called multiple times, to handle multiple sets of options.
1683 Returns if an unrecognized option is seen.
1684 Returns number of strings consumed. */
1687 cpp_handle_options (pfile, argc, argv)
1693 int strings_processed;
1694 for (i = 0; i < argc; i += strings_processed)
1696 strings_processed = cpp_handle_option (pfile, argc - i, argv + i);
1697 if (strings_processed == 0)
1706 cpp_notice ("Usage: %s [switches] input output\n", progname);
1709 -include <file> Include the contents of <file> before other files\n\
1710 -imacros <file> Accept definition of macros in <file>\n\
1711 -iprefix <path> Specify <path> as a prefix for next two options\n\
1712 -iwithprefix <dir> Add <dir> to the end of the system include path\n\
1713 -iwithprefixbefore <dir> Add <dir> to the end of the main include path\n\
1714 -isystem <dir> Add <dir> to the start of the system include path\n\
1715 -idirafter <dir> Add <dir> to the end of the system include path\n\
1716 -I <dir> Add <dir> to the end of the main include path\n\
1717 -nostdinc Do not search system include directories\n\
1718 (dirs specified with -isystem will still be used)\n\
1719 -nostdinc++ Do not search system include directories for C++\n\
1720 -o <file> Put output into <file>\n\
1721 -pedantic Issue all warnings demanded by strict ANSI C\n\
1722 -traditional Follow K&R pre-processor behaviour\n\
1723 -trigraphs Support ANSI C trigraphs\n\
1724 -lang-c Assume that the input sources are in C\n\
1725 -lang-c89 Assume that the input sources are in C89\n\
1726 -lang-c++ Assume that the input sources are in C++\n\
1727 -lang-objc Assume that the input sources are in ObjectiveC\n\
1728 -lang-objc++ Assume that the input sources are in ObjectiveC++\n\
1729 -lang-asm Assume that the input sources are in assembler\n\
1730 -lang-chill Assume that the input sources are in Chill\n\
1731 -std=<std name> Specify the conformance standard; one of:\n\
1732 gnu89, gnu9x, c89, c9x, iso9899:1990,\n\
1733 iso9899:199409, iso9899:199x\n\
1734 -+ Allow parsing of C++ style features\n\
1735 -w Inhibit warning messages\n\
1736 -Wtrigraphs Warn if trigraphs are encountered\n\
1737 -Wno-trigraphs Do not warn about trigraphs\n\
1738 -Wcomment{s} Warn if one comment starts inside another\n\
1739 -Wno-comment{s} Do not warn about comments\n\
1740 -Wtraditional Warn if a macro argument is/would be turned into\n\
1741 a string if -traditional is specified\n\
1742 -Wno-traditional Do not warn about stringification\n\
1743 -Wundef Warn if an undefined macro is used by #if\n\
1744 -Wno-undef Do not warn about testing undefined macros\n\
1745 -Wimport Warn about the use of the #import directive\n\
1746 -Wno-import Do not warn about the use of #import\n\
1747 -Werror Treat all warnings as errors\n\
1748 -Wno-error Do not treat warnings as errors\n\
1749 -Wall Enable all preprocessor warnings\n\
1750 -M Generate make dependencies\n\
1751 -MM As -M, but ignore system header files\n\
1752 -MD As -M, but put output in a .d file\n\
1753 -MMD As -MD, but ignore system header files\n\
1754 -MG Treat missing header file as generated files\n\
1755 -g Include #define and #undef directives in the output\n\
1756 -D<macro> Define a <macro> with string '1' as its value\n\
1757 -D<macro>=<val> Define a <macro> with <val> as its value\n\
1758 -A<question> (<answer>) Assert the <answer> to <question>\n\
1759 -U<macro> Undefine <macro> \n\
1760 -v Display the version number\n\
1761 -H Print the name of header files as they are used\n\
1762 -C Do not discard comments\n\
1763 -dM Display a list of macro definitions active at end\n\
1764 -dD Preserve macro definitions in output\n\
1765 -dN As -dD except that only the names are preserved\n\
1766 -dI Include #include directives in the output\n\
1767 -ifoutput Describe skipped code blocks in output \n\
1768 -P Do not generate #line directives\n\
1769 -$ Do not allow '$' in identifiers\n\
1770 -remap Remap file names when including files.\n\
1771 -h or --help Display this information\n\