c-opts.c revision 259268
1145171Sdas/* C/ObjC/C++ command line option handling. 2145171Sdas Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 3145171Sdas Free Software Foundation, Inc. 4145171Sdas Contributed by Neil Booth. 5145171Sdas 6145171SdasThis file is part of GCC. 7145171Sdas 8145171SdasGCC is free software; you can redistribute it and/or modify it under 9145171Sdasthe terms of the GNU General Public License as published by the Free 10145171SdasSoftware Foundation; either version 2, or (at your option) any later 11145171Sdasversion. 12145171Sdas 13145171SdasGCC is distributed in the hope that it will be useful, but WITHOUT ANY 14145171SdasWARRANTY; without even the implied warranty of MERCHANTABILITY or 15145171SdasFITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 16145171Sdasfor more details. 17145171Sdas 18145171SdasYou should have received a copy of the GNU General Public License 19145171Sdasalong with GCC; see the file COPYING. If not, write to the Free 20145171SdasSoftware Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 21145171Sdas02110-1301, USA. */ 22145171Sdas 23145171Sdas/* $FreeBSD: stable/10/contrib/gcc/c-opts.c 259268 2013-12-12 18:15:32Z pfg $ */ 24145171Sdas/* Merged C99 inline changes from gcc trunk 122565 2007-03-05 */ 25145171Sdas 26145171Sdas#include "config.h" 27145171Sdas#include "system.h" 28145171Sdas#include "coretypes.h" 29145171Sdas#include "tm.h" 30145171Sdas#include "tree.h" 31145171Sdas#include "c-common.h" 32145171Sdas#include "c-pragma.h" 33145171Sdas#include "flags.h" 34145171Sdas#include "toplev.h" 35145171Sdas#include "langhooks.h" 36145171Sdas#include "tree-inline.h" 37145171Sdas#include "diagnostic.h" 38145171Sdas#include "intl.h" 39145171Sdas#include "cppdefault.h" 40192760Sattilio#include "c-incpath.h" 41217108Skib#include "debug.h" /* For debug_hooks. */ 42217108Skib#include "opts.h" 43#include "options.h" 44#include "mkdeps.h" 45 46#ifndef DOLLARS_IN_IDENTIFIERS 47# define DOLLARS_IN_IDENTIFIERS true 48#endif 49 50#ifndef TARGET_SYSTEM_ROOT 51# define TARGET_SYSTEM_ROOT NULL 52#endif 53 54#ifndef TARGET_OPTF 55#define TARGET_OPTF(ARG) 56#endif 57 58/* CPP's options. */ 59static cpp_options *cpp_opts; 60 61/* Input filename. */ 62static const char *this_input_filename; 63 64/* Filename and stream for preprocessed output. */ 65static const char *out_fname; 66static FILE *out_stream; 67 68/* Append dependencies to deps_file. */ 69static bool deps_append; 70 71/* If dependency switches (-MF etc.) have been given. */ 72static bool deps_seen; 73 74/* If -v seen. */ 75static bool verbose; 76 77/* If -lang-fortran seen. */ 78static bool lang_fortran = false; 79 80/* Dependency output file. */ 81static const char *deps_file; 82 83/* The prefix given by -iprefix, if any. */ 84static const char *iprefix; 85 86/* The multilib directory given by -imultilib, if any. */ 87static const char *imultilib; 88 89/* The system root, if any. Overridden by -isysroot. */ 90static const char *sysroot = TARGET_SYSTEM_ROOT; 91 92/* Zero disables all standard directories for headers. */ 93static bool std_inc = true; 94 95/* Zero disables the C++-specific standard directories for headers. */ 96static bool std_cxx_inc = true; 97 98/* If the quote chain has been split by -I-. */ 99static bool quote_chain_split; 100 101/* If -Wunused-macros. */ 102static bool warn_unused_macros; 103 104/* If -Wvariadic-macros. */ 105static bool warn_variadic_macros = true; 106 107/* Number of deferred options. */ 108static size_t deferred_count; 109 110/* Number of deferred options scanned for -include. */ 111static size_t include_cursor; 112 113static void set_Wimplicit (int); 114static void handle_OPT_d (const char *); 115static void set_std_cxx98 (int); 116static void set_std_c89 (int, int); 117static void set_std_c99 (int); 118static void check_deps_environment_vars (void); 119static void handle_deferred_opts (void); 120static void sanitize_cpp_opts (void); 121static void add_prefixed_path (const char *, size_t); 122static void push_command_line_include (void); 123static void cb_file_change (cpp_reader *, const struct line_map *); 124static void cb_dir_change (cpp_reader *, const char *); 125static void finish_options (void); 126 127#ifndef STDC_0_IN_SYSTEM_HEADERS 128#define STDC_0_IN_SYSTEM_HEADERS 0 129#endif 130 131/* Holds switches parsed by c_common_handle_option (), but whose 132 handling is deferred to c_common_post_options (). */ 133static void defer_opt (enum opt_code, const char *); 134static struct deferred_opt 135{ 136 enum opt_code code; 137 const char *arg; 138} *deferred_opts; 139 140/* Complain that switch CODE expects an argument but none was 141 provided. OPT was the command-line option. Return FALSE to get 142 the default message in opts.c, TRUE if we provide a specialized 143 one. */ 144bool 145c_common_missing_argument (const char *opt, size_t code) 146{ 147 switch (code) 148 { 149 default: 150 /* Pick up the default message. */ 151 return false; 152 153 case OPT_fconstant_string_class_: 154 error ("no class name specified with %qs", opt); 155 break; 156 157 case OPT_A: 158 error ("assertion missing after %qs", opt); 159 break; 160 161 case OPT_D: 162 case OPT_U: 163 error ("macro name missing after %qs", opt); 164 break; 165 166 case OPT_F: 167 case OPT_I: 168 case OPT_idirafter: 169 case OPT_isysroot: 170 case OPT_isystem: 171 case OPT_iquote: 172 error ("missing path after %qs", opt); 173 break; 174 175 case OPT_MF: 176 case OPT_MD: 177 case OPT_MMD: 178 case OPT_include: 179 case OPT_imacros: 180 case OPT_o: 181 error ("missing filename after %qs", opt); 182 break; 183 184 case OPT_MQ: 185 case OPT_MT: 186 error ("missing makefile target after %qs", opt); 187 break; 188 } 189 190 return true; 191} 192 193/* Defer option CODE with argument ARG. */ 194static void 195defer_opt (enum opt_code code, const char *arg) 196{ 197 deferred_opts[deferred_count].code = code; 198 deferred_opts[deferred_count].arg = arg; 199 deferred_count++; 200} 201 202/* Common initialization before parsing options. */ 203unsigned int 204c_common_init_options (unsigned int argc, const char **argv) 205{ 206 static const unsigned int lang_flags[] = {CL_C, CL_ObjC, CL_CXX, CL_ObjCXX}; 207 unsigned int i, result; 208 209 /* This is conditionalized only because that is the way the front 210 ends used to do it. Maybe this should be unconditional? */ 211 if (c_dialect_cxx ()) 212 { 213 /* By default wrap lines at 80 characters. Is getenv 214 ("COLUMNS") preferable? */ 215 diagnostic_line_cutoff (global_dc) = 80; 216 /* By default, emit location information once for every 217 diagnostic message. */ 218 diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE; 219 } 220 221 parse_in = cpp_create_reader (c_dialect_cxx () ? CLK_GNUCXX: CLK_GNUC89, 222 ident_hash, &line_table); 223 224 cpp_opts = cpp_get_options (parse_in); 225 cpp_opts->dollars_in_ident = DOLLARS_IN_IDENTIFIERS; 226 cpp_opts->objc = c_dialect_objc (); 227 228 /* Reset to avoid warnings on internal definitions. We set it just 229 before passing on command-line options to cpplib. */ 230 cpp_opts->warn_dollars = 0; 231 232 flag_exceptions = c_dialect_cxx (); 233 warn_pointer_arith = c_dialect_cxx (); 234 warn_write_strings = c_dialect_cxx(); 235 236 deferred_opts = XNEWVEC (struct deferred_opt, argc); 237 238 result = lang_flags[c_language]; 239 240 if (c_language == clk_c) 241 { 242 /* If preprocessing assembly language, accept any of the C-family 243 front end options since the driver may pass them through. */ 244 for (i = 1; i < argc; i++) 245 if (! strcmp (argv[i], "-lang-asm")) 246 { 247 result |= CL_C | CL_ObjC | CL_CXX | CL_ObjCXX; 248 break; 249 } 250 251#ifdef CL_Fortran 252 for (i = 1; i < argc; i++) 253 if (! strcmp (argv[i], "-lang-fortran")) 254 { 255 result |= CL_Fortran; 256 break; 257 } 258#endif 259 } 260 261 return result; 262} 263 264/* Handle switch SCODE with argument ARG. VALUE is true, unless no- 265 form of an -f or -W option was given. Returns 0 if the switch was 266 invalid, a negative number to prevent language-independent 267 processing in toplev.c (a hack necessary for the short-term). */ 268int 269c_common_handle_option (size_t scode, const char *arg, int value) 270{ 271 const struct cl_option *option = &cl_options[scode]; 272 enum opt_code code = (enum opt_code) scode; 273 int result = 1; 274 275 /* Prevent resetting the language standard to a C dialect when the driver 276 has already determined that we're looking at assembler input. */ 277 bool preprocessing_asm_p = (cpp_get_options (parse_in)->lang == CLK_ASM); 278 279 switch (code) 280 { 281 default: 282 if (cl_options[code].flags & (CL_C | CL_CXX | CL_ObjC | CL_ObjCXX)) 283 break; 284#ifdef CL_Fortran 285 if (lang_fortran && (cl_options[code].flags & (CL_Fortran))) 286 break; 287#endif 288 result = 0; 289 break; 290 291 case OPT__output_pch_: 292 pch_file = arg; 293 break; 294 295 case OPT_A: 296 defer_opt (code, arg); 297 break; 298 299 case OPT_C: 300 cpp_opts->discard_comments = 0; 301 break; 302 303 case OPT_CC: 304 cpp_opts->discard_comments = 0; 305 cpp_opts->discard_comments_in_macro_exp = 0; 306 break; 307 308 case OPT_D: 309 defer_opt (code, arg); 310 break; 311 312 case OPT_E: 313 flag_preprocess_only = 1; 314 break; 315 316 case OPT_H: 317 cpp_opts->print_include_names = 1; 318 break; 319 320 case OPT_F: 321 TARGET_OPTF (xstrdup (arg)); 322 break; 323 324 case OPT_I: 325 if (strcmp (arg, "-")) 326 add_path (xstrdup (arg), BRACKET, 0, true); 327 else 328 { 329 if (quote_chain_split) 330 error ("-I- specified twice"); 331 quote_chain_split = true; 332 split_quote_chain (); 333 inform ("obsolete option -I- used, please use -iquote instead"); 334 } 335 break; 336 337 case OPT_M: 338 case OPT_MM: 339 /* When doing dependencies with -M or -MM, suppress normal 340 preprocessed output, but still do -dM etc. as software 341 depends on this. Preprocessed output does occur if -MD, -MMD 342 or environment var dependency generation is used. */ 343 cpp_opts->deps.style = (code == OPT_M ? DEPS_SYSTEM: DEPS_USER); 344 flag_no_output = 1; 345 cpp_opts->inhibit_warnings = 1; 346 break; 347 348 case OPT_MD: 349 case OPT_MMD: 350 cpp_opts->deps.style = (code == OPT_MD ? DEPS_SYSTEM: DEPS_USER); 351 deps_file = arg; 352 break; 353 354 case OPT_MF: 355 deps_seen = true; 356 deps_file = arg; 357 break; 358 359 case OPT_MG: 360 deps_seen = true; 361 cpp_opts->deps.missing_files = true; 362 break; 363 364 case OPT_MP: 365 deps_seen = true; 366 cpp_opts->deps.phony_targets = true; 367 break; 368 369 case OPT_MQ: 370 case OPT_MT: 371 deps_seen = true; 372 defer_opt (code, arg); 373 break; 374 375 case OPT_P: 376 flag_no_line_commands = 1; 377 break; 378 379 case OPT_fworking_directory: 380 flag_working_directory = value; 381 break; 382 383 case OPT_U: 384 defer_opt (code, arg); 385 break; 386 387 case OPT_Wall: 388 set_Wunused (value); 389 set_Wformat (value); 390 set_Wimplicit (value); 391 warn_char_subscripts = value; 392 warn_missing_braces = value; 393 warn_parentheses = value; 394 warn_return_type = value; 395 warn_sequence_point = value; /* Was C only. */ 396 if (c_dialect_cxx ()) 397 warn_sign_compare = value; 398 warn_switch = value; 399 warn_strict_aliasing = value; 400 warn_strict_overflow = value; 401 warn_address = value; 402 403 /* Only warn about unknown pragmas that are not in system 404 headers. */ 405 warn_unknown_pragmas = value; 406 407 /* We save the value of warn_uninitialized, since if they put 408 -Wuninitialized on the command line, we need to generate a 409 warning about not using it without also specifying -O. */ 410 if (warn_uninitialized != 1) 411 warn_uninitialized = (value ? 2 : 0); 412 413 if (!c_dialect_cxx ()) 414 /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding 415 can turn it off only if it's not explicit. */ 416 warn_main = value * 2; 417 else 418 { 419 /* C++-specific warnings. */ 420 warn_reorder = value; 421 warn_nontemplate_friend = value; 422 } 423 424 cpp_opts->warn_trigraphs = value; 425 cpp_opts->warn_comments = value; 426 cpp_opts->warn_num_sign_change = value; 427 cpp_opts->warn_multichar = value; /* Was C++ only. */ 428 429 if (warn_pointer_sign == -1) 430 warn_pointer_sign = 1; 431 break; 432 433 case OPT_Wcomment: 434 case OPT_Wcomments: 435 cpp_opts->warn_comments = value; 436 break; 437 438 case OPT_Wdeprecated: 439 cpp_opts->warn_deprecated = value; 440 break; 441 442 case OPT_Wendif_labels: 443 cpp_opts->warn_endif_labels = value; 444 break; 445 446 case OPT_Werror: 447 cpp_opts->warnings_are_errors = value; 448 global_dc->warning_as_error_requested = value; 449 break; 450 451 case OPT_Werror_implicit_function_declaration: 452 mesg_implicit_function_declaration = 2; 453 break; 454 455 case OPT_Wformat: 456 set_Wformat (value); 457 break; 458 459 case OPT_Wformat_: 460 set_Wformat (atoi (arg)); 461 break; 462 463 case OPT_Wimplicit: 464 set_Wimplicit (value); 465 break; 466 467 case OPT_Wimport: 468 /* Silently ignore for now. */ 469 break; 470 471 case OPT_Winvalid_pch: 472 cpp_opts->warn_invalid_pch = value; 473 break; 474 475 case OPT_Wmain: 476 if (value) 477 warn_main = 1; 478 else 479 warn_main = -1; 480 break; 481 482 case OPT_Wmissing_include_dirs: 483 cpp_opts->warn_missing_include_dirs = value; 484 break; 485 486 case OPT_Wmultichar: 487 cpp_opts->warn_multichar = value; 488 break; 489 490 case OPT_Wnormalized_: 491 if (!value || (arg && strcasecmp (arg, "none") == 0)) 492 cpp_opts->warn_normalize = normalized_none; 493 else if (!arg || strcasecmp (arg, "nfkc") == 0) 494 cpp_opts->warn_normalize = normalized_KC; 495 else if (strcasecmp (arg, "id") == 0) 496 cpp_opts->warn_normalize = normalized_identifier_C; 497 else if (strcasecmp (arg, "nfc") == 0) 498 cpp_opts->warn_normalize = normalized_C; 499 else 500 error ("argument %qs to %<-Wnormalized%> not recognized", arg); 501 break; 502 503 case OPT_Wreturn_type: 504 warn_return_type = value; 505 break; 506 507 case OPT_Wstrict_null_sentinel: 508 warn_strict_null_sentinel = value; 509 break; 510 511 case OPT_Wsystem_headers: 512 cpp_opts->warn_system_headers = value; 513 break; 514 515 case OPT_Wtraditional: 516 cpp_opts->warn_traditional = value; 517 break; 518 519 case OPT_Wtrigraphs: 520 cpp_opts->warn_trigraphs = value; 521 break; 522 523 case OPT_Wundef: 524 cpp_opts->warn_undef = value; 525 break; 526 527 case OPT_Wunknown_pragmas: 528 /* Set to greater than 1, so that even unknown pragmas in 529 system headers will be warned about. */ 530 warn_unknown_pragmas = value * 2; 531 break; 532 533 case OPT_Wunused_macros: 534 warn_unused_macros = value; 535 break; 536 537 case OPT_Wvariadic_macros: 538 warn_variadic_macros = value; 539 break; 540 541 case OPT_Wwrite_strings: 542 warn_write_strings = value; 543 break; 544 545 case OPT_Weffc__: 546 warn_ecpp = value; 547 if (value) 548 warn_nonvdtor = true; 549 break; 550 551 case OPT_ansi: 552 if (!c_dialect_cxx ()) 553 set_std_c89 (false, true); 554 else 555 set_std_cxx98 (true); 556 break; 557 558 case OPT_d: 559 handle_OPT_d (arg); 560 break; 561 562 case OPT_fcond_mismatch: 563 if (!c_dialect_cxx ()) 564 { 565 flag_cond_mismatch = value; 566 break; 567 } 568 /* Fall through. */ 569 570 case OPT_fall_virtual: 571 case OPT_falt_external_templates: 572 case OPT_fenum_int_equiv: 573 case OPT_fexternal_templates: 574 case OPT_fguiding_decls: 575 case OPT_fhonor_std: 576 case OPT_fhuge_objects: 577 case OPT_flabels_ok: 578 case OPT_fname_mangling_version_: 579 case OPT_fnew_abi: 580 case OPT_fnonnull_objects: 581 case OPT_fsquangle: 582 case OPT_fstrict_prototype: 583 case OPT_fthis_is_variable: 584 case OPT_fvtable_thunks: 585 case OPT_fxref: 586 case OPT_fvtable_gc: 587 warning (0, "switch %qs is no longer supported", option->opt_text); 588 break; 589 590 case OPT_faccess_control: 591 flag_access_control = value; 592 break; 593 594 case OPT_fasm: 595 flag_no_asm = !value; 596 break; 597 598 case OPT_fbuiltin: 599 flag_no_builtin = !value; 600 break; 601 602 case OPT_fbuiltin_: 603 if (value) 604 result = 0; 605 else 606 disable_builtin_function (arg); 607 break; 608 609 case OPT_fdollars_in_identifiers: 610 cpp_opts->dollars_in_ident = value; 611 break; 612 613 case OPT_ffreestanding: 614 value = !value; 615 /* Fall through.... */ 616 case OPT_fhosted: 617 flag_hosted = value; 618 flag_no_builtin = !value; 619 /* warn_main will be 2 if set by -Wall, 1 if set by -Wmain */ 620 if (!value && warn_main == 2) 621 warn_main = 0; 622 break; 623 624 case OPT_fshort_double: 625 flag_short_double = value; 626 break; 627 628 case OPT_fshort_enums: 629 flag_short_enums = value; 630 break; 631 632 case OPT_fshort_wchar: 633 flag_short_wchar = value; 634 break; 635 636 case OPT_fsigned_bitfields: 637 flag_signed_bitfields = value; 638 break; 639 640 case OPT_fsigned_char: 641 flag_signed_char = value; 642 break; 643 644 case OPT_funsigned_bitfields: 645 flag_signed_bitfields = !value; 646 break; 647 648 case OPT_funsigned_char: 649 flag_signed_char = !value; 650 break; 651 652 case OPT_fcheck_new: 653 flag_check_new = value; 654 break; 655 656 case OPT_fconserve_space: 657 flag_conserve_space = value; 658 break; 659 660 case OPT_fconstant_string_class_: 661 constant_string_class_name = arg; 662 break; 663 664 case OPT_fdefault_inline: 665 flag_default_inline = value; 666 break; 667 668 case OPT_felide_constructors: 669 flag_elide_constructors = value; 670 break; 671 672 case OPT_fenforce_eh_specs: 673 flag_enforce_eh_specs = value; 674 break; 675 676 case OPT_fextended_identifiers: 677 cpp_opts->extended_identifiers = value; 678 break; 679 680 case OPT_ffor_scope: 681 flag_new_for_scope = value; 682 break; 683 684 case OPT_fgnu_keywords: 685 flag_no_gnu_keywords = !value; 686 break; 687 688 case OPT_fgnu_runtime: 689 flag_next_runtime = !value; 690 break; 691 692 case OPT_fhandle_exceptions: 693 warning (0, "-fhandle-exceptions has been renamed -fexceptions (and is now on by default)"); 694 flag_exceptions = value; 695 break; 696 697 case OPT_fimplement_inlines: 698 flag_implement_inlines = value; 699 break; 700 701 case OPT_fimplicit_inline_templates: 702 flag_implicit_inline_templates = value; 703 break; 704 705 case OPT_fimplicit_templates: 706 flag_implicit_templates = value; 707 break; 708 709 case OPT_fms_extensions: 710 flag_ms_extensions = value; 711 break; 712 713 case OPT_fnext_runtime: 714 flag_next_runtime = value; 715 break; 716 717 case OPT_fnil_receivers: 718 flag_nil_receivers = value; 719 break; 720 721 case OPT_fnonansi_builtins: 722 flag_no_nonansi_builtin = !value; 723 break; 724 725 case OPT_foperator_names: 726 cpp_opts->operator_names = value; 727 break; 728 729 case OPT_foptional_diags: 730 flag_optional_diags = value; 731 break; 732 733 case OPT_fpch_deps: 734 cpp_opts->restore_pch_deps = value; 735 break; 736 737 case OPT_fpch_preprocess: 738 flag_pch_preprocess = value; 739 break; 740 741 case OPT_fpermissive: 742 flag_permissive = value; 743 break; 744 745 case OPT_fpreprocessed: 746 cpp_opts->preprocessed = value; 747 break; 748 749 case OPT_freplace_objc_classes: 750 flag_replace_objc_classes = value; 751 break; 752 753 case OPT_frepo: 754 flag_use_repository = value; 755 if (value) 756 flag_implicit_templates = 0; 757 break; 758 759 case OPT_frtti: 760 flag_rtti = value; 761 break; 762 763 case OPT_fshow_column: 764 cpp_opts->show_column = value; 765 break; 766 767 case OPT_fstats: 768 flag_detailed_statistics = value; 769 break; 770 771 case OPT_ftabstop_: 772 /* It is documented that we silently ignore silly values. */ 773 if (value >= 1 && value <= 100) 774 cpp_opts->tabstop = value; 775 break; 776 777 case OPT_fexec_charset_: 778 cpp_opts->narrow_charset = arg; 779 break; 780 781 case OPT_fwide_exec_charset_: 782 cpp_opts->wide_charset = arg; 783 break; 784 785 case OPT_finput_charset_: 786 cpp_opts->input_charset = arg; 787 break; 788 789 case OPT_ftemplate_depth_: 790 max_tinst_depth = value; 791 break; 792 793 case OPT_fuse_cxa_atexit: 794 flag_use_cxa_atexit = value; 795 break; 796 797 case OPT_fuse_cxa_get_exception_ptr: 798 flag_use_cxa_get_exception_ptr = value; 799 break; 800 801 case OPT_fvisibility_inlines_hidden: 802 visibility_options.inlines_hidden = value; 803 break; 804 805 case OPT_fweak: 806 flag_weak = value; 807 break; 808 809 case OPT_fthreadsafe_statics: 810 flag_threadsafe_statics = value; 811 break; 812 813 case OPT_fzero_link: 814 flag_zero_link = value; 815 break; 816 817 case OPT_gen_decls: 818 flag_gen_declaration = 1; 819 break; 820 821 case OPT_femit_struct_debug_baseonly: 822 set_struct_debug_option ("base"); 823 break; 824 825 case OPT_femit_struct_debug_reduced: 826 set_struct_debug_option ("dir:ord:sys,dir:gen:any,ind:base"); 827 break; 828 829 case OPT_femit_struct_debug_detailed_: 830 set_struct_debug_option (arg); 831 break; 832 833 case OPT_idirafter: 834 add_path (xstrdup (arg), AFTER, 0, true); 835 break; 836 837 case OPT_imacros: 838 case OPT_include: 839 defer_opt (code, arg); 840 break; 841 842 case OPT_imultilib: 843 imultilib = arg; 844 break; 845 846 case OPT_iprefix: 847 iprefix = arg; 848 break; 849 850 case OPT_iquote: 851 add_path (xstrdup (arg), QUOTE, 0, true); 852 break; 853 854 case OPT_isysroot: 855 sysroot = arg; 856 break; 857 858 case OPT_isystem: 859 add_path (xstrdup (arg), SYSTEM, 0, true); 860 break; 861 862 case OPT_iwithprefix: 863 add_prefixed_path (arg, SYSTEM); 864 break; 865 866 case OPT_iwithprefixbefore: 867 add_prefixed_path (arg, BRACKET); 868 break; 869 870 case OPT_lang_asm: 871 cpp_set_lang (parse_in, CLK_ASM); 872 cpp_opts->dollars_in_ident = false; 873 break; 874 875 case OPT_lang_fortran: 876 lang_fortran = true; 877 break; 878 879 case OPT_lang_objc: 880 cpp_opts->objc = 1; 881 break; 882 883 case OPT_nostdinc: 884 std_inc = false; 885 break; 886 887 case OPT_nostdinc__: 888 std_cxx_inc = false; 889 break; 890 891 case OPT_o: 892 if (!out_fname) 893 out_fname = arg; 894 else 895 error ("output filename specified twice"); 896 break; 897 898 /* We need to handle the -pedantic switches here, rather than in 899 c_common_post_options, so that a subsequent -Wno-endif-labels 900 is not overridden. */ 901 case OPT_pedantic_errors: 902 cpp_opts->pedantic_errors = 1; 903 /* Fall through. */ 904 case OPT_pedantic: 905 cpp_opts->pedantic = 1; 906 cpp_opts->warn_endif_labels = 1; 907 if (warn_pointer_sign == -1) 908 warn_pointer_sign = 1; 909 if (warn_overlength_strings == -1) 910 warn_overlength_strings = 1; 911 break; 912 913 case OPT_print_objc_runtime_info: 914 print_struct_values = 1; 915 break; 916 917 case OPT_print_pch_checksum: 918 c_common_print_pch_checksum (stdout); 919 exit_after_options = true; 920 break; 921 922 case OPT_remap: 923 cpp_opts->remap = 1; 924 break; 925 926 case OPT_std_c__98: 927 case OPT_std_gnu__98: 928 if (!preprocessing_asm_p) 929 set_std_cxx98 (code == OPT_std_c__98 /* ISO */); 930 break; 931 932 case OPT_std_c89: 933 case OPT_std_iso9899_1990: 934 case OPT_std_iso9899_199409: 935 if (!preprocessing_asm_p) 936 set_std_c89 (code == OPT_std_iso9899_199409 /* c94 */, true /* ISO */); 937 break; 938 939 case OPT_std_gnu89: 940 if (!preprocessing_asm_p) 941 set_std_c89 (false /* c94 */, false /* ISO */); 942 break; 943 944 case OPT_std_c99: 945 case OPT_std_c9x: 946 case OPT_std_iso9899_1999: 947 case OPT_std_iso9899_199x: 948 if (!preprocessing_asm_p) 949 set_std_c99 (true /* ISO */); 950 break; 951 952 case OPT_std_gnu99: 953 case OPT_std_gnu9x: 954 if (!preprocessing_asm_p) 955 set_std_c99 (false /* ISO */); 956 break; 957 958 case OPT_trigraphs: 959 cpp_opts->trigraphs = 1; 960 break; 961 962 case OPT_traditional_cpp: 963 cpp_opts->traditional = 1; 964 break; 965 966 case OPT_undef: 967 flag_undef = 1; 968 break; 969 970 case OPT_w: 971 cpp_opts->inhibit_warnings = 1; 972 break; 973 974 case OPT_v: 975 verbose = true; 976 break; 977 } 978 979 return result; 980} 981 982/* Post-switch processing. */ 983bool 984c_common_post_options (const char **pfilename) 985{ 986 struct cpp_callbacks *cb; 987 988 /* Canonicalize the input and output filenames. */ 989 if (in_fnames == NULL) 990 { 991 in_fnames = XNEWVEC (const char *, 1); 992 in_fnames[0] = ""; 993 } 994 else if (strcmp (in_fnames[0], "-") == 0) 995 in_fnames[0] = ""; 996 997 if (out_fname == NULL || !strcmp (out_fname, "-")) 998 out_fname = ""; 999 1000 if (cpp_opts->deps.style == DEPS_NONE) 1001 check_deps_environment_vars (); 1002 1003 handle_deferred_opts (); 1004 1005 sanitize_cpp_opts (); 1006 1007 register_include_chains (parse_in, sysroot, iprefix, imultilib, 1008 std_inc, std_cxx_inc && c_dialect_cxx (), verbose); 1009 1010#ifdef C_COMMON_OVERRIDE_OPTIONS 1011 /* Some machines may reject certain combinations of C 1012 language-specific options. */ 1013 C_COMMON_OVERRIDE_OPTIONS; 1014#endif 1015 1016 flag_inline_trees = 1; 1017 1018 /* Use tree inlining. */ 1019 if (!flag_no_inline) 1020 flag_no_inline = 1; 1021 if (flag_inline_functions) 1022 flag_inline_trees = 2; 1023 1024 /* By default we use C99 inline semantics in GNU99 or C99 mode. C99 1025 inline semantics are not supported in GNU89 or C89 mode. */ 1026 if (flag_gnu89_inline == -1) 1027 flag_gnu89_inline = !flag_isoc99; 1028 else if (!flag_gnu89_inline && !flag_isoc99) 1029 error ("-fno-gnu89-inline is only supported in GNU99 or C99 mode"); 1030 1031 /* If we are given more than one input file, we must use 1032 unit-at-a-time mode. */ 1033 if (num_in_fnames > 1) 1034 flag_unit_at_a_time = 1; 1035 1036 /* Default to ObjC sjlj exception handling if NeXT runtime. */ 1037 if (flag_objc_sjlj_exceptions < 0) 1038 flag_objc_sjlj_exceptions = flag_next_runtime; 1039 if (flag_objc_exceptions && !flag_objc_sjlj_exceptions) 1040 flag_exceptions = 1; 1041 1042 /* -Wextra implies -Wsign-compare, -Wmissing-field-initializers and 1043 -Woverride-init, but not if explicitly overridden. */ 1044 if (warn_sign_compare == -1) 1045 warn_sign_compare = extra_warnings; 1046 if (warn_missing_field_initializers == -1) 1047 warn_missing_field_initializers = extra_warnings; 1048 if (warn_override_init == -1) 1049 warn_override_init = extra_warnings; 1050 1051 /* -Wpointer_sign is disabled by default, but it is enabled if any 1052 of -Wall or -pedantic are given. */ 1053 if (warn_pointer_sign == -1) 1054 warn_pointer_sign = 0; 1055 1056 /* -Woverlength-strings is off by default, but is enabled by -pedantic. 1057 It is never enabled in C++, as the minimum limit is not normative 1058 in that standard. */ 1059 if (warn_overlength_strings == -1 || c_dialect_cxx ()) 1060 warn_overlength_strings = 0; 1061 1062 /* Special format checking options don't work without -Wformat; warn if 1063 they are used. */ 1064 if (!warn_format) 1065 { 1066 warning (OPT_Wformat_y2k, 1067 "-Wformat-y2k ignored without -Wformat"); 1068 warning (OPT_Wformat_extra_args, 1069 "-Wformat-extra-args ignored without -Wformat"); 1070 warning (OPT_Wformat_zero_length, 1071 "-Wformat-zero-length ignored without -Wformat"); 1072 warning (OPT_Wformat_nonliteral, 1073 "-Wformat-nonliteral ignored without -Wformat"); 1074 warning (OPT_Wformat_security, 1075 "-Wformat-security ignored without -Wformat"); 1076 } 1077 1078 /* C99 requires special handling of complex multiplication and division; 1079 -ffast-math and -fcx-limited-range are handled in process_options. */ 1080 if (flag_isoc99) 1081 flag_complex_method = 2; 1082 1083 if (flag_preprocess_only) 1084 { 1085 /* Open the output now. We must do so even if flag_no_output is 1086 on, because there may be other output than from the actual 1087 preprocessing (e.g. from -dM). */ 1088 if (out_fname[0] == '\0') 1089 out_stream = stdout; 1090 else 1091 out_stream = fopen (out_fname, "w"); 1092 1093 if (out_stream == NULL) 1094 { 1095 fatal_error ("opening output file %s: %m", out_fname); 1096 return false; 1097 } 1098 1099 if (num_in_fnames > 1) 1100 error ("too many filenames given. Type %s --help for usage", 1101 progname); 1102 1103 init_pp_output (out_stream); 1104 } 1105 else 1106 { 1107 init_c_lex (); 1108 1109 /* Yuk. WTF is this? I do know ObjC relies on it somewhere. */ 1110 input_location = UNKNOWN_LOCATION; 1111 } 1112 1113 cb = cpp_get_callbacks (parse_in); 1114 cb->file_change = cb_file_change; 1115 cb->dir_change = cb_dir_change; 1116 cpp_post_options (parse_in); 1117 1118 input_location = UNKNOWN_LOCATION; 1119 1120 /* If an error has occurred in cpplib, note it so we fail 1121 immediately. */ 1122 errorcount += cpp_errors (parse_in); 1123 1124 *pfilename = this_input_filename 1125 = cpp_read_main_file (parse_in, in_fnames[0]); 1126 /* Don't do any compilation or preprocessing if there is no input file. */ 1127 if (this_input_filename == NULL) 1128 { 1129 errorcount++; 1130 return false; 1131 } 1132 1133 if (flag_working_directory 1134 && flag_preprocess_only && !flag_no_line_commands) 1135 pp_dir_change (parse_in, get_src_pwd ()); 1136 1137 return flag_preprocess_only; 1138} 1139 1140/* Front end initialization common to C, ObjC and C++. */ 1141bool 1142c_common_init (void) 1143{ 1144 /* Set up preprocessor arithmetic. Must be done after call to 1145 c_common_nodes_and_builtins for type nodes to be good. */ 1146 cpp_opts->precision = TYPE_PRECISION (intmax_type_node); 1147 cpp_opts->char_precision = TYPE_PRECISION (char_type_node); 1148 cpp_opts->int_precision = TYPE_PRECISION (integer_type_node); 1149 cpp_opts->wchar_precision = TYPE_PRECISION (wchar_type_node); 1150 cpp_opts->unsigned_wchar = TYPE_UNSIGNED (wchar_type_node); 1151 cpp_opts->bytes_big_endian = BYTES_BIG_ENDIAN; 1152 1153 /* This can't happen until after wchar_precision and bytes_big_endian 1154 are known. */ 1155 cpp_init_iconv (parse_in); 1156 1157 if (version_flag) 1158 c_common_print_pch_checksum (stderr); 1159 1160 if (flag_preprocess_only) 1161 { 1162 finish_options (); 1163 preprocess_file (parse_in); 1164 return false; 1165 } 1166 1167 /* Has to wait until now so that cpplib has its hash table. */ 1168 init_pragma (); 1169 1170 return true; 1171} 1172 1173/* Initialize the integrated preprocessor after debug output has been 1174 initialized; loop over each input file. */ 1175void 1176c_common_parse_file (int set_yydebug) 1177{ 1178 unsigned int i; 1179 1180 /* Enable parser debugging, if requested and we can. If requested 1181 and we can't, notify the user. */ 1182#if YYDEBUG != 0 1183 yydebug = set_yydebug; 1184#else 1185 if (set_yydebug) 1186 warning (0, "YYDEBUG was not defined at build time, -dy ignored"); 1187#endif 1188 1189 i = 0; 1190 for (;;) 1191 { 1192 /* Start the main input file, if the debug writer wants it. */ 1193 if (debug_hooks->start_end_main_source_file) 1194 (*debug_hooks->start_source_file) (0, this_input_filename); 1195 finish_options (); 1196 pch_init (); 1197 push_file_scope (); 1198 c_parse_file (); 1199 finish_file (); 1200 pop_file_scope (); 1201 /* And end the main input file, if the debug writer wants it */ 1202 if (debug_hooks->start_end_main_source_file) 1203 (*debug_hooks->end_source_file) (0); 1204 if (++i >= num_in_fnames) 1205 break; 1206 cpp_undef_all (parse_in); 1207 this_input_filename 1208 = cpp_read_main_file (parse_in, in_fnames[i]); 1209 /* If an input file is missing, abandon further compilation. 1210 cpplib has issued a diagnostic. */ 1211 if (!this_input_filename) 1212 break; 1213 } 1214} 1215 1216/* Common finish hook for the C, ObjC and C++ front ends. */ 1217void 1218c_common_finish (void) 1219{ 1220 FILE *deps_stream = NULL; 1221 1222 if (cpp_opts->deps.style != DEPS_NONE) 1223 { 1224 /* If -M or -MM was seen without -MF, default output to the 1225 output stream. */ 1226 if (!deps_file) 1227 deps_stream = out_stream; 1228 else 1229 { 1230 deps_stream = fopen (deps_file, deps_append ? "a": "w"); 1231 if (!deps_stream) 1232 fatal_error ("opening dependency file %s: %m", deps_file); 1233 } 1234 } 1235 1236 /* For performance, avoid tearing down cpplib's internal structures 1237 with cpp_destroy (). */ 1238 errorcount += cpp_finish (parse_in, deps_stream); 1239 1240 if (deps_stream && deps_stream != out_stream 1241 && (ferror (deps_stream) || fclose (deps_stream))) 1242 fatal_error ("closing dependency file %s: %m", deps_file); 1243 1244 if (out_stream && (ferror (out_stream) || fclose (out_stream))) 1245 fatal_error ("when writing output to %s: %m", out_fname); 1246} 1247 1248/* Either of two environment variables can specify output of 1249 dependencies. Their value is either "OUTPUT_FILE" or "OUTPUT_FILE 1250 DEPS_TARGET", where OUTPUT_FILE is the file to write deps info to 1251 and DEPS_TARGET is the target to mention in the deps. They also 1252 result in dependency information being appended to the output file 1253 rather than overwriting it, and like Sun's compiler 1254 SUNPRO_DEPENDENCIES suppresses the dependency on the main file. */ 1255static void 1256check_deps_environment_vars (void) 1257{ 1258 char *spec; 1259 1260 GET_ENVIRONMENT (spec, "DEPENDENCIES_OUTPUT"); 1261 if (spec) 1262 cpp_opts->deps.style = DEPS_USER; 1263 else 1264 { 1265 GET_ENVIRONMENT (spec, "SUNPRO_DEPENDENCIES"); 1266 if (spec) 1267 { 1268 cpp_opts->deps.style = DEPS_SYSTEM; 1269 cpp_opts->deps.ignore_main_file = true; 1270 } 1271 } 1272 1273 if (spec) 1274 { 1275 /* Find the space before the DEPS_TARGET, if there is one. */ 1276 char *s = strchr (spec, ' '); 1277 if (s) 1278 { 1279 /* Let the caller perform MAKE quoting. */ 1280 defer_opt (OPT_MT, s + 1); 1281 *s = '\0'; 1282 } 1283 1284 /* Command line -MF overrides environment variables and default. */ 1285 if (!deps_file) 1286 deps_file = spec; 1287 1288 deps_append = 1; 1289 deps_seen = true; 1290 } 1291} 1292 1293/* Handle deferred command line switches. */ 1294static void 1295handle_deferred_opts (void) 1296{ 1297 size_t i; 1298 struct deps *deps; 1299 1300 /* Avoid allocating the deps buffer if we don't need it. 1301 (This flag may be true without there having been -MT or -MQ 1302 options, but we'll still need the deps buffer.) */ 1303 if (!deps_seen) 1304 return; 1305 1306 deps = cpp_get_deps (parse_in); 1307 1308 for (i = 0; i < deferred_count; i++) 1309 { 1310 struct deferred_opt *opt = &deferred_opts[i]; 1311 1312 if (opt->code == OPT_MT || opt->code == OPT_MQ) 1313 deps_add_target (deps, opt->arg, opt->code == OPT_MQ); 1314 } 1315} 1316 1317/* These settings are appropriate for GCC, but not necessarily so for 1318 cpplib as a library. */ 1319static void 1320sanitize_cpp_opts (void) 1321{ 1322 /* If we don't know what style of dependencies to output, complain 1323 if any other dependency switches have been given. */ 1324 if (deps_seen && cpp_opts->deps.style == DEPS_NONE) 1325 error ("to generate dependencies you must specify either -M or -MM"); 1326 1327 /* -dM and dependencies suppress normal output; do it here so that 1328 the last -d[MDN] switch overrides earlier ones. */ 1329 if (flag_dump_macros == 'M') 1330 flag_no_output = 1; 1331 1332 /* Disable -dD, -dN and -dI if normal output is suppressed. Allow 1333 -dM since at least glibc relies on -M -dM to work. */ 1334 /* Also, flag_no_output implies flag_no_line_commands, always. */ 1335 if (flag_no_output) 1336 { 1337 if (flag_dump_macros != 'M') 1338 flag_dump_macros = 0; 1339 flag_dump_includes = 0; 1340 flag_no_line_commands = 1; 1341 } 1342 1343 cpp_opts->unsigned_char = !flag_signed_char; 1344 cpp_opts->stdc_0_in_system_headers = STDC_0_IN_SYSTEM_HEADERS; 1345 1346 /* We want -Wno-long-long to override -pedantic -std=non-c99 1347 and/or -Wtraditional, whatever the ordering. */ 1348 cpp_opts->warn_long_long 1349 = warn_long_long && ((!flag_isoc99 && pedantic) || warn_traditional); 1350 1351 /* Similarly with -Wno-variadic-macros. No check for c99 here, since 1352 this also turns off warnings about GCCs extension. */ 1353 cpp_opts->warn_variadic_macros 1354 = warn_variadic_macros && (pedantic || warn_traditional); 1355 1356 /* If we're generating preprocessor output, emit current directory 1357 if explicitly requested or if debugging information is enabled. 1358 ??? Maybe we should only do it for debugging formats that 1359 actually output the current directory? */ 1360 if (flag_working_directory == -1) 1361 flag_working_directory = (debug_info_level != DINFO_LEVEL_NONE); 1362} 1363 1364/* Add include path with a prefix at the front of its name. */ 1365static void 1366add_prefixed_path (const char *suffix, size_t chain) 1367{ 1368 char *path; 1369 const char *prefix; 1370 size_t prefix_len, suffix_len; 1371 1372 suffix_len = strlen (suffix); 1373 prefix = iprefix ? iprefix : cpp_GCC_INCLUDE_DIR; 1374 prefix_len = iprefix ? strlen (iprefix) : cpp_GCC_INCLUDE_DIR_len; 1375 1376 path = (char *) xmalloc (prefix_len + suffix_len + 1); 1377 memcpy (path, prefix, prefix_len); 1378 memcpy (path + prefix_len, suffix, suffix_len); 1379 path[prefix_len + suffix_len] = '\0'; 1380 1381 add_path (path, chain, 0, false); 1382} 1383 1384/* Handle -D, -U, -A, -imacros, and the first -include. */ 1385static void 1386finish_options (void) 1387{ 1388 if (!cpp_opts->preprocessed) 1389 { 1390 size_t i; 1391 1392 cb_file_change (parse_in, 1393 linemap_add (&line_table, LC_RENAME, 0, 1394 _("<built-in>"), 0)); 1395 1396 cpp_init_builtins (parse_in, flag_hosted); 1397 c_cpp_builtins (parse_in); 1398 1399 /* We're about to send user input to cpplib, so make it warn for 1400 things that we previously (when we sent it internal definitions) 1401 told it to not warn. 1402 1403 C99 permits implementation-defined characters in identifiers. 1404 The documented meaning of -std= is to turn off extensions that 1405 conflict with the specified standard, and since a strictly 1406 conforming program cannot contain a '$', we do not condition 1407 their acceptance on the -std= setting. */ 1408 cpp_opts->warn_dollars = (cpp_opts->pedantic && !cpp_opts->c99); 1409 1410 cb_file_change (parse_in, 1411 linemap_add (&line_table, LC_RENAME, 0, 1412 _("<command-line>"), 0)); 1413 1414 for (i = 0; i < deferred_count; i++) 1415 { 1416 struct deferred_opt *opt = &deferred_opts[i]; 1417 1418 if (opt->code == OPT_D) 1419 cpp_define (parse_in, opt->arg); 1420 else if (opt->code == OPT_U) 1421 cpp_undef (parse_in, opt->arg); 1422 else if (opt->code == OPT_A) 1423 { 1424 if (opt->arg[0] == '-') 1425 cpp_unassert (parse_in, opt->arg + 1); 1426 else 1427 cpp_assert (parse_in, opt->arg); 1428 } 1429 } 1430 1431 /* Handle -imacros after -D and -U. */ 1432 for (i = 0; i < deferred_count; i++) 1433 { 1434 struct deferred_opt *opt = &deferred_opts[i]; 1435 1436 if (opt->code == OPT_imacros 1437 && cpp_push_include (parse_in, opt->arg)) 1438 { 1439 /* Disable push_command_line_include callback for now. */ 1440 include_cursor = deferred_count + 1; 1441 cpp_scan_nooutput (parse_in); 1442 } 1443 } 1444 } 1445 1446 include_cursor = 0; 1447 push_command_line_include (); 1448} 1449 1450/* Give CPP the next file given by -include, if any. */ 1451static void 1452push_command_line_include (void) 1453{ 1454 while (include_cursor < deferred_count) 1455 { 1456 struct deferred_opt *opt = &deferred_opts[include_cursor++]; 1457 1458 if (!cpp_opts->preprocessed && opt->code == OPT_include 1459 && cpp_push_include (parse_in, opt->arg)) 1460 return; 1461 } 1462 1463 if (include_cursor == deferred_count) 1464 { 1465 include_cursor++; 1466 /* -Wunused-macros should only warn about macros defined hereafter. */ 1467 cpp_opts->warn_unused_macros = warn_unused_macros; 1468 /* Restore the line map from <command line>. */ 1469 if (!cpp_opts->preprocessed) 1470 cpp_change_file (parse_in, LC_RENAME, this_input_filename); 1471 1472 /* Set this here so the client can change the option if it wishes, 1473 and after stacking the main file so we don't trace the main file. */ 1474 line_table.trace_includes = cpp_opts->print_include_names; 1475 } 1476} 1477 1478/* File change callback. Has to handle -include files. */ 1479static void 1480cb_file_change (cpp_reader * ARG_UNUSED (pfile), 1481 const struct line_map *new_map) 1482{ 1483 if (flag_preprocess_only) 1484 pp_file_change (new_map); 1485 else 1486 fe_file_change (new_map); 1487 1488 if (new_map == 0 || (new_map->reason == LC_LEAVE && MAIN_FILE_P (new_map))) 1489 push_command_line_include (); 1490} 1491 1492void 1493cb_dir_change (cpp_reader * ARG_UNUSED (pfile), const char *dir) 1494{ 1495 if (!set_src_pwd (dir)) 1496 warning (0, "too late for # directive to set debug directory"); 1497} 1498 1499/* Set the C 89 standard (with 1994 amendments if C94, without GNU 1500 extensions if ISO). There is no concept of gnu94. */ 1501static void 1502set_std_c89 (int c94, int iso) 1503{ 1504 cpp_set_lang (parse_in, c94 ? CLK_STDC94: iso ? CLK_STDC89: CLK_GNUC89); 1505 flag_iso = iso; 1506 flag_no_asm = iso; 1507 flag_no_gnu_keywords = iso; 1508 flag_no_nonansi_builtin = iso; 1509 flag_isoc94 = c94; 1510 flag_isoc99 = 0; 1511} 1512 1513/* Set the C 99 standard (without GNU extensions if ISO). */ 1514static void 1515set_std_c99 (int iso) 1516{ 1517 cpp_set_lang (parse_in, iso ? CLK_STDC99: CLK_GNUC99); 1518 flag_no_asm = iso; 1519 flag_no_nonansi_builtin = iso; 1520 flag_iso = iso; 1521 flag_isoc99 = 1; 1522 flag_isoc94 = 1; 1523} 1524 1525/* Set the C++ 98 standard (without GNU extensions if ISO). */ 1526static void 1527set_std_cxx98 (int iso) 1528{ 1529 cpp_set_lang (parse_in, iso ? CLK_CXX98: CLK_GNUCXX); 1530 flag_no_gnu_keywords = iso; 1531 flag_no_nonansi_builtin = iso; 1532 flag_iso = iso; 1533} 1534 1535/* Handle setting implicit to ON. */ 1536static void 1537set_Wimplicit (int on) 1538{ 1539 warn_implicit = on; 1540 warn_implicit_int = on; 1541 if (on) 1542 { 1543 if (mesg_implicit_function_declaration != 2) 1544 mesg_implicit_function_declaration = 1; 1545 } 1546 else 1547 mesg_implicit_function_declaration = 0; 1548} 1549 1550/* Args to -d specify what to dump. Silently ignore 1551 unrecognized options; they may be aimed at toplev.c. */ 1552static void 1553handle_OPT_d (const char *arg) 1554{ 1555 char c; 1556 1557 while ((c = *arg++) != '\0') 1558 switch (c) 1559 { 1560 case 'M': /* Dump macros only. */ 1561 case 'N': /* Dump names. */ 1562 case 'D': /* Dump definitions. */ 1563 flag_dump_macros = c; 1564 break; 1565 1566 case 'I': 1567 flag_dump_includes = 1; 1568 break; 1569 } 1570} 1571