1/* C/ObjC/C++ command line option handling. 2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 3 Free Software Foundation, Inc. 4 Contributed by Neil Booth. 5 6This file is part of GCC. 7 8GCC is free software; you can redistribute it and/or modify it under 9the terms of the GNU General Public License as published by the Free 10Software Foundation; either version 2, or (at your option) any later 11version. 12 13GCC is distributed in the hope that it will be useful, but WITHOUT ANY 14WARRANTY; without even the implied warranty of MERCHANTABILITY or 15FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 16for more details. 17 18You should have received a copy of the GNU General Public License 19along with GCC; see the file COPYING. If not, write to the Free 20Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 2102110-1301, USA. */ 22 23/* $FreeBSD$ */ 24/* Merged C99 inline changes from gcc trunk 122565 2007-03-05 */ 25 26#include "config.h" 27#include "system.h" 28#include "coretypes.h" 29#include "tm.h" 30#include "tree.h" 31#include "c-common.h" 32#include "c-pragma.h" 33#include "flags.h" 34#include "toplev.h" 35#include "langhooks.h" 36#include "tree-inline.h" 37#include "diagnostic.h" 38#include "intl.h" 39#include "cppdefault.h" 40#include "c-incpath.h" 41#include "debug.h" /* For debug_hooks. */ 42#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 /* APPLE LOCAL -Wmost */ 389 case OPT_Wmost: 390 set_Wunused (value); 391 set_Wformat (value); 392 set_Wimplicit (value); 393 warn_char_subscripts = value; 394 warn_missing_braces = value; 395 /* APPLE LOCAL begin -Wmost --dpatel */ 396 if (code != OPT_Wmost) 397 warn_parentheses = value; 398 /* APPLE LOCAL end -Wmost --dpatel */ 399 warn_return_type = value; 400 warn_sequence_point = value; /* Was C only. */ 401 if (c_dialect_cxx ()) 402 warn_sign_compare = value; 403 warn_switch = value; 404 set_warn_strict_aliasing (value); 405 warn_strict_overflow = value; 406 warn_address = value; 407 408 /* Only warn about unknown pragmas that are not in system 409 headers. */ 410 warn_unknown_pragmas = value; 411 412 /* We save the value of warn_uninitialized, since if they put 413 -Wuninitialized on the command line, we need to generate a 414 warning about not using it without also specifying -O. */ 415 if (warn_uninitialized != 1) 416 warn_uninitialized = (value ? 2 : 0); 417 418 if (!c_dialect_cxx ()) 419 /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding 420 can turn it off only if it's not explicit. */ 421 warn_main = value * 2; 422 else 423 { 424 /* C++-specific warnings. */ 425 warn_reorder = value; 426 warn_nontemplate_friend = value; 427 } 428 429 cpp_opts->warn_trigraphs = value; 430 cpp_opts->warn_comments = value; 431 cpp_opts->warn_num_sign_change = value; 432 cpp_opts->warn_multichar = value; /* Was C++ only. */ 433 434 if (warn_pointer_sign == -1) 435 warn_pointer_sign = 1; 436 break; 437 438 case OPT_Wcomment: 439 case OPT_Wcomments: 440 cpp_opts->warn_comments = value; 441 break; 442 443 case OPT_Wdeprecated: 444 cpp_opts->warn_deprecated = value; 445 break; 446 447 case OPT_Wendif_labels: 448 cpp_opts->warn_endif_labels = value; 449 break; 450 451 case OPT_Werror: 452 cpp_opts->warnings_are_errors = value; 453 global_dc->warning_as_error_requested = value; 454 break; 455 456 case OPT_Werror_implicit_function_declaration: 457 mesg_implicit_function_declaration = 2; 458 break; 459 460 case OPT_Wformat: 461 set_Wformat (value); 462 break; 463 464 case OPT_Wformat_: 465 set_Wformat (atoi (arg)); 466 break; 467 468 case OPT_Wimplicit: 469 set_Wimplicit (value); 470 break; 471 472 case OPT_Wimport: 473 /* Silently ignore for now. */ 474 break; 475 476 case OPT_Winvalid_pch: 477 cpp_opts->warn_invalid_pch = value; 478 break; 479 480 case OPT_Wmain: 481 if (value) 482 warn_main = 1; 483 else 484 warn_main = -1; 485 break; 486 487 case OPT_Wmissing_include_dirs: 488 cpp_opts->warn_missing_include_dirs = value; 489 break; 490 491 case OPT_Wmultichar: 492 cpp_opts->warn_multichar = value; 493 break; 494 495 /* APPLE LOCAL begin -Wnewline-eof */ 496 case OPT_Wnewline_eof: 497 cpp_opts->warn_newline_at_eof = value; 498 break; 499 /* APPLE LOCAL end -Wnewline-eof */ 500 501 case OPT_Wnormalized_: 502 if (!value || (arg && strcasecmp (arg, "none") == 0)) 503 cpp_opts->warn_normalize = normalized_none; 504 else if (!arg || strcasecmp (arg, "nfkc") == 0) 505 cpp_opts->warn_normalize = normalized_KC; 506 else if (strcasecmp (arg, "id") == 0) 507 cpp_opts->warn_normalize = normalized_identifier_C; 508 else if (strcasecmp (arg, "nfc") == 0) 509 cpp_opts->warn_normalize = normalized_C; 510 else 511 error ("argument %qs to %<-Wnormalized%> not recognized", arg); 512 break; 513 514 case OPT_Wreturn_type: 515 warn_return_type = value; 516 break; 517 518 case OPT_Wstrict_null_sentinel: 519 warn_strict_null_sentinel = value; 520 break; 521 522 case OPT_Wsystem_headers: 523 cpp_opts->warn_system_headers = value; 524 break; 525 526 case OPT_Wtraditional: 527 cpp_opts->warn_traditional = value; 528 break; 529 530 case OPT_Wtrigraphs: 531 cpp_opts->warn_trigraphs = value; 532 break; 533 534 case OPT_Wundef: 535 cpp_opts->warn_undef = value; 536 break; 537 538 case OPT_Wunknown_pragmas: 539 /* Set to greater than 1, so that even unknown pragmas in 540 system headers will be warned about. */ 541 warn_unknown_pragmas = value * 2; 542 break; 543 544 case OPT_Wunused_macros: 545 warn_unused_macros = value; 546 break; 547 548 case OPT_Wvariadic_macros: 549 warn_variadic_macros = value; 550 break; 551 552 case OPT_Wwrite_strings: 553 warn_write_strings = value; 554 break; 555 556 case OPT_Weffc__: 557 warn_ecpp = value; 558 if (value) 559 warn_nonvdtor = true; 560 break; 561 562 case OPT_ansi: 563 if (!c_dialect_cxx ()) 564 set_std_c89 (false, true); 565 else 566 set_std_cxx98 (true); 567 break; 568 569 case OPT_d: 570 handle_OPT_d (arg); 571 break; 572 573 case OPT_fcond_mismatch: 574 if (!c_dialect_cxx ()) 575 { 576 flag_cond_mismatch = value; 577 break; 578 } 579 /* Fall through. */ 580 581 case OPT_fall_virtual: 582 case OPT_falt_external_templates: 583 case OPT_fenum_int_equiv: 584 case OPT_fexternal_templates: 585 case OPT_fguiding_decls: 586 case OPT_fhonor_std: 587 case OPT_fhuge_objects: 588 case OPT_flabels_ok: 589 case OPT_fname_mangling_version_: 590 case OPT_fnew_abi: 591 case OPT_fnonnull_objects: 592 case OPT_fsquangle: 593 case OPT_fstrict_prototype: 594 case OPT_fthis_is_variable: 595 case OPT_fvtable_thunks: 596 case OPT_fxref: 597 case OPT_fvtable_gc: 598 warning (0, "switch %qs is no longer supported", option->opt_text); 599 break; 600 601 case OPT_faccess_control: 602 flag_access_control = value; 603 break; 604 605 case OPT_fasm: 606 flag_no_asm = !value; 607 break; 608 609 case OPT_fbuiltin: 610 flag_no_builtin = !value; 611 break; 612 613 case OPT_fbuiltin_: 614 if (value) 615 result = 0; 616 else 617 disable_builtin_function (arg); 618 break; 619 620 case OPT_fdirectives_only: 621 cpp_opts->directives_only = 1; 622 break; 623 624 case OPT_fdollars_in_identifiers: 625 cpp_opts->dollars_in_ident = value; 626 break; 627 628 case OPT_ffreestanding: 629 value = !value; 630 /* Fall through.... */ 631 case OPT_fhosted: 632 flag_hosted = value; 633 flag_no_builtin = !value; 634 /* warn_main will be 2 if set by -Wall, 1 if set by -Wmain */ 635 if (!value && warn_main == 2) 636 warn_main = 0; 637 break; 638 639 case OPT_fshort_double: 640 flag_short_double = value; 641 break; 642 643 case OPT_fshort_enums: 644 flag_short_enums = value; 645 break; 646 647 case OPT_fshort_wchar: 648 flag_short_wchar = value; 649 break; 650 651 case OPT_fsigned_bitfields: 652 flag_signed_bitfields = value; 653 break; 654 655 case OPT_fsigned_char: 656 flag_signed_char = value; 657 break; 658 659 case OPT_funsigned_bitfields: 660 flag_signed_bitfields = !value; 661 break; 662 663 case OPT_funsigned_char: 664 flag_signed_char = !value; 665 break; 666 667 case OPT_fcheck_new: 668 flag_check_new = value; 669 break; 670 671 case OPT_fconserve_space: 672 flag_conserve_space = value; 673 break; 674 675 case OPT_fconstant_string_class_: 676 constant_string_class_name = arg; 677 break; 678 679 case OPT_fdefault_inline: 680 flag_default_inline = value; 681 break; 682 683 case OPT_felide_constructors: 684 flag_elide_constructors = value; 685 break; 686 687 case OPT_fenforce_eh_specs: 688 flag_enforce_eh_specs = value; 689 break; 690 691 case OPT_fextended_identifiers: 692 cpp_opts->extended_identifiers = value; 693 break; 694 695 case OPT_ffor_scope: 696 flag_new_for_scope = value; 697 break; 698 699 case OPT_fgnu_keywords: 700 flag_no_gnu_keywords = !value; 701 break; 702 703 case OPT_fgnu_runtime: 704 flag_next_runtime = !value; 705 break; 706 707 case OPT_fhandle_exceptions: 708 warning (0, "-fhandle-exceptions has been renamed -fexceptions (and is now on by default)"); 709 flag_exceptions = value; 710 break; 711 712 case OPT_fimplement_inlines: 713 flag_implement_inlines = value; 714 break; 715 716 case OPT_fimplicit_inline_templates: 717 flag_implicit_inline_templates = value; 718 break; 719 720 case OPT_fimplicit_templates: 721 flag_implicit_templates = value; 722 break; 723 724 case OPT_flax_vector_conversions: 725 flag_lax_vector_conversions = value; 726 break; 727 728 case OPT_fms_extensions: 729 flag_ms_extensions = value; 730 break; 731 732 case OPT_fnext_runtime: 733 flag_next_runtime = value; 734 break; 735 736 case OPT_fnil_receivers: 737 flag_nil_receivers = value; 738 break; 739 740 case OPT_fnonansi_builtins: 741 flag_no_nonansi_builtin = !value; 742 break; 743 744 case OPT_foperator_names: 745 cpp_opts->operator_names = value; 746 break; 747 748 case OPT_foptional_diags: 749 flag_optional_diags = value; 750 break; 751 752 case OPT_fpch_deps: 753 cpp_opts->restore_pch_deps = value; 754 break; 755 756 case OPT_fpch_preprocess: 757 flag_pch_preprocess = value; 758 break; 759 760 case OPT_fpermissive: 761 flag_permissive = value; 762 break; 763 764 case OPT_fpreprocessed: 765 cpp_opts->preprocessed = value; 766 break; 767 768 case OPT_freplace_objc_classes: 769 flag_replace_objc_classes = value; 770 break; 771 772 case OPT_frepo: 773 flag_use_repository = value; 774 if (value) 775 flag_implicit_templates = 0; 776 break; 777 778 case OPT_frtti: 779 flag_rtti = value; 780 break; 781 782 case OPT_fshow_column: 783 cpp_opts->show_column = value; 784 break; 785 786 case OPT_fstats: 787 flag_detailed_statistics = value; 788 break; 789 790 case OPT_ftabstop_: 791 /* It is documented that we silently ignore silly values. */ 792 if (value >= 1 && value <= 100) 793 cpp_opts->tabstop = value; 794 break; 795 796 case OPT_fexec_charset_: 797 cpp_opts->narrow_charset = arg; 798 break; 799 800 case OPT_fwide_exec_charset_: 801 cpp_opts->wide_charset = arg; 802 break; 803 804 case OPT_finput_charset_: 805 cpp_opts->input_charset = arg; 806 break; 807 808 case OPT_ftemplate_depth_: 809 max_tinst_depth = value; 810 break; 811 812 case OPT_fuse_cxa_atexit: 813 flag_use_cxa_atexit = value; 814 break; 815 816 case OPT_fuse_cxa_get_exception_ptr: 817 flag_use_cxa_get_exception_ptr = value; 818 break; 819 820 case OPT_fvisibility_inlines_hidden: 821 visibility_options.inlines_hidden = value; 822 break; 823 824 case OPT_fweak: 825 flag_weak = value; 826 break; 827 828 case OPT_fthreadsafe_statics: 829 flag_threadsafe_statics = value; 830 break; 831 832 case OPT_fzero_link: 833 flag_zero_link = value; 834 break; 835 836 case OPT_gen_decls: 837 flag_gen_declaration = 1; 838 break; 839 840 case OPT_femit_struct_debug_baseonly: 841 set_struct_debug_option ("base"); 842 break; 843 844 case OPT_femit_struct_debug_reduced: 845 set_struct_debug_option ("dir:ord:sys,dir:gen:any,ind:base"); 846 break; 847 848 case OPT_femit_struct_debug_detailed_: 849 set_struct_debug_option (arg); 850 break; 851 852 case OPT_idirafter: 853 add_path (xstrdup (arg), AFTER, 0, true); 854 break; 855 856 case OPT_imacros: 857 case OPT_include: 858 defer_opt (code, arg); 859 break; 860 861 case OPT_imultilib: 862 imultilib = arg; 863 break; 864 865 case OPT_iprefix: 866 iprefix = arg; 867 break; 868 869 case OPT_iquote: 870 add_path (xstrdup (arg), QUOTE, 0, true); 871 break; 872 873 case OPT_isysroot: 874 sysroot = arg; 875 break; 876 877 case OPT_isystem: 878 add_path (xstrdup (arg), SYSTEM, 0, true); 879 break; 880 881 case OPT_iwithprefix: 882 add_prefixed_path (arg, SYSTEM); 883 break; 884 885 case OPT_iwithprefixbefore: 886 add_prefixed_path (arg, BRACKET); 887 break; 888 889 case OPT_lang_asm: 890 cpp_set_lang (parse_in, CLK_ASM); 891 cpp_opts->dollars_in_ident = false; 892 break; 893 894 case OPT_lang_fortran: 895 lang_fortran = true; 896 break; 897 898 case OPT_lang_objc: 899 cpp_opts->objc = 1; 900 break; 901 902 case OPT_nostdinc: 903 std_inc = false; 904 break; 905 906 case OPT_nostdinc__: 907 std_cxx_inc = false; 908 break; 909 910 case OPT_o: 911 if (!out_fname) 912 out_fname = arg; 913 else 914 error ("output filename specified twice"); 915 break; 916 917 /* We need to handle the -pedantic switches here, rather than in 918 c_common_post_options, so that a subsequent -Wno-endif-labels 919 is not overridden. */ 920 case OPT_pedantic_errors: 921 cpp_opts->pedantic_errors = 1; 922 /* Fall through. */ 923 case OPT_pedantic: 924 cpp_opts->pedantic = 1; 925 cpp_opts->warn_endif_labels = 1; 926 if (warn_pointer_sign == -1) 927 warn_pointer_sign = 1; 928 if (warn_overlength_strings == -1) 929 warn_overlength_strings = 1; 930 break; 931 932 case OPT_print_objc_runtime_info: 933 print_struct_values = 1; 934 break; 935 936 case OPT_print_pch_checksum: 937 c_common_print_pch_checksum (stdout); 938 exit_after_options = true; 939 break; 940 941 case OPT_remap: 942 cpp_opts->remap = 1; 943 break; 944 945 case OPT_std_c__98: 946 case OPT_std_gnu__98: 947 if (!preprocessing_asm_p) 948 set_std_cxx98 (code == OPT_std_c__98 /* ISO */); 949 break; 950 951 case OPT_std_c89: 952 case OPT_std_iso9899_1990: 953 case OPT_std_iso9899_199409: 954 if (!preprocessing_asm_p) 955 set_std_c89 (code == OPT_std_iso9899_199409 /* c94 */, true /* ISO */); 956 break; 957 958 case OPT_std_gnu89: 959 if (!preprocessing_asm_p) 960 set_std_c89 (false /* c94 */, false /* ISO */); 961 break; 962 963 case OPT_std_c99: 964 case OPT_std_c9x: 965 case OPT_std_iso9899_1999: 966 case OPT_std_iso9899_199x: 967 if (!preprocessing_asm_p) 968 set_std_c99 (true /* ISO */); 969 break; 970 971 case OPT_std_gnu99: 972 case OPT_std_gnu9x: 973 if (!preprocessing_asm_p) 974 set_std_c99 (false /* ISO */); 975 break; 976 977 case OPT_trigraphs: 978 cpp_opts->trigraphs = 1; 979 break; 980 981 case OPT_traditional_cpp: 982 cpp_opts->traditional = 1; 983 break; 984 985 case OPT_undef: 986 flag_undef = 1; 987 break; 988 989 case OPT_w: 990 cpp_opts->inhibit_warnings = 1; 991 break; 992 993 case OPT_v: 994 verbose = true; 995 break; 996 } 997 998 return result; 999} 1000 1001/* Post-switch processing. */ 1002bool 1003c_common_post_options (const char **pfilename) 1004{ 1005 struct cpp_callbacks *cb; 1006 1007 /* Canonicalize the input and output filenames. */ 1008 if (in_fnames == NULL) 1009 { 1010 in_fnames = XNEWVEC (const char *, 1); 1011 in_fnames[0] = ""; 1012 } 1013 else if (strcmp (in_fnames[0], "-") == 0) 1014 in_fnames[0] = ""; 1015 1016 if (out_fname == NULL || !strcmp (out_fname, "-")) 1017 out_fname = ""; 1018 1019 if (cpp_opts->deps.style == DEPS_NONE) 1020 check_deps_environment_vars (); 1021 1022 handle_deferred_opts (); 1023 1024 sanitize_cpp_opts (); 1025 1026 register_include_chains (parse_in, sysroot, iprefix, imultilib, 1027 std_inc, std_cxx_inc && c_dialect_cxx (), verbose); 1028 1029#ifdef C_COMMON_OVERRIDE_OPTIONS 1030 /* Some machines may reject certain combinations of C 1031 language-specific options. */ 1032 C_COMMON_OVERRIDE_OPTIONS; 1033#endif 1034 1035 flag_inline_trees = 1; 1036 1037 /* Use tree inlining. */ 1038 if (!flag_no_inline) 1039 flag_no_inline = 1; 1040 if (flag_inline_functions) 1041 flag_inline_trees = 2; 1042 1043 /* APPLE LOCAL begin radar 5811887 - radar 6084601 */ 1044 /* In all flavors of c99, except for ObjC/ObjC++, blocks are off by default 1045 unless requested via -fblocks. */ 1046 if (flag_blocks == -1 && flag_iso && !c_dialect_objc()) 1047 flag_blocks = 0; 1048 /* APPLE LOCAL end radar 5811887 - radar 6084601 */ 1049 1050 /* By default we use C99 inline semantics in GNU99 or C99 mode. C99 1051 inline semantics are not supported in GNU89 or C89 mode. */ 1052 if (flag_gnu89_inline == -1) 1053 flag_gnu89_inline = !flag_isoc99; 1054 else if (!flag_gnu89_inline && !flag_isoc99) 1055 error ("-fno-gnu89-inline is only supported in GNU99 or C99 mode"); 1056 1057 /* If we are given more than one input file, we must use 1058 unit-at-a-time mode. */ 1059 if (num_in_fnames > 1) 1060 flag_unit_at_a_time = 1; 1061 1062 /* Default to ObjC sjlj exception handling if NeXT runtime. */ 1063 if (flag_objc_sjlj_exceptions < 0) 1064 flag_objc_sjlj_exceptions = flag_next_runtime; 1065 if (flag_objc_exceptions && !flag_objc_sjlj_exceptions) 1066 flag_exceptions = 1; 1067 1068 /* -Wextra implies -Wsign-compare, -Wmissing-field-initializers and 1069 -Woverride-init, but not if explicitly overridden. */ 1070 if (warn_sign_compare == -1) 1071 warn_sign_compare = extra_warnings; 1072 if (warn_missing_field_initializers == -1) 1073 warn_missing_field_initializers = extra_warnings; 1074 if (warn_override_init == -1) 1075 warn_override_init = extra_warnings; 1076 1077 /* -Wpointer_sign is disabled by default, but it is enabled if any 1078 of -Wall or -pedantic are given. */ 1079 if (warn_pointer_sign == -1) 1080 warn_pointer_sign = 0; 1081 1082 /* -Woverlength-strings is off by default, but is enabled by -pedantic. 1083 It is never enabled in C++, as the minimum limit is not normative 1084 in that standard. */ 1085 if (warn_overlength_strings == -1 || c_dialect_cxx ()) 1086 warn_overlength_strings = 0; 1087 1088 /* Special format checking options don't work without -Wformat; warn if 1089 they are used. */ 1090 if (!warn_format) 1091 { 1092 warning (OPT_Wformat_y2k, 1093 "-Wformat-y2k ignored without -Wformat"); 1094 warning (OPT_Wformat_extra_args, 1095 "-Wformat-extra-args ignored without -Wformat"); 1096 warning (OPT_Wformat_zero_length, 1097 "-Wformat-zero-length ignored without -Wformat"); 1098 warning (OPT_Wformat_nonliteral, 1099 "-Wformat-nonliteral ignored without -Wformat"); 1100 warning (OPT_Wformat_security, 1101 "-Wformat-security ignored without -Wformat"); 1102 } 1103 1104 /* C99 requires special handling of complex multiplication and division; 1105 -ffast-math and -fcx-limited-range are handled in process_options. */ 1106 if (flag_isoc99) 1107 flag_complex_method = 2; 1108 1109 if (flag_preprocess_only) 1110 { 1111 /* Open the output now. We must do so even if flag_no_output is 1112 on, because there may be other output than from the actual 1113 preprocessing (e.g. from -dM). */ 1114 if (out_fname[0] == '\0') 1115 out_stream = stdout; 1116 else 1117 out_stream = fopen (out_fname, "w"); 1118 1119 if (out_stream == NULL) 1120 { 1121 fatal_error ("opening output file %s: %m", out_fname); 1122 return false; 1123 } 1124 1125 if (num_in_fnames > 1) 1126 error ("too many filenames given. Type %s --help for usage", 1127 progname); 1128 1129 init_pp_output (out_stream); 1130 } 1131 else 1132 { 1133 init_c_lex (); 1134 1135 /* Yuk. WTF is this? I do know ObjC relies on it somewhere. */ 1136 input_location = UNKNOWN_LOCATION; 1137 } 1138 1139 cb = cpp_get_callbacks (parse_in); 1140 cb->file_change = cb_file_change; 1141 cb->dir_change = cb_dir_change; 1142 cpp_post_options (parse_in); 1143 1144 input_location = UNKNOWN_LOCATION; 1145 1146 /* If an error has occurred in cpplib, note it so we fail 1147 immediately. */ 1148 errorcount += cpp_errors (parse_in); 1149 1150 *pfilename = this_input_filename 1151 = cpp_read_main_file (parse_in, in_fnames[0]); 1152 /* Don't do any compilation or preprocessing if there is no input file. */ 1153 if (this_input_filename == NULL) 1154 { 1155 errorcount++; 1156 return false; 1157 } 1158 1159 if (flag_working_directory 1160 && flag_preprocess_only && !flag_no_line_commands) 1161 pp_dir_change (parse_in, get_src_pwd ()); 1162 1163 return flag_preprocess_only; 1164} 1165 1166/* Front end initialization common to C, ObjC and C++. */ 1167bool 1168c_common_init (void) 1169{ 1170 /* Set up preprocessor arithmetic. Must be done after call to 1171 c_common_nodes_and_builtins for type nodes to be good. */ 1172 cpp_opts->precision = TYPE_PRECISION (intmax_type_node); 1173 cpp_opts->char_precision = TYPE_PRECISION (char_type_node); 1174 cpp_opts->int_precision = TYPE_PRECISION (integer_type_node); 1175 cpp_opts->wchar_precision = TYPE_PRECISION (wchar_type_node); 1176 cpp_opts->unsigned_wchar = TYPE_UNSIGNED (wchar_type_node); 1177 cpp_opts->bytes_big_endian = BYTES_BIG_ENDIAN; 1178 1179 /* This can't happen until after wchar_precision and bytes_big_endian 1180 are known. */ 1181 cpp_init_iconv (parse_in); 1182 1183 if (version_flag) 1184 c_common_print_pch_checksum (stderr); 1185 1186 if (flag_preprocess_only) 1187 { 1188 finish_options (); 1189 preprocess_file (parse_in); 1190 return false; 1191 } 1192 1193 /* Has to wait until now so that cpplib has its hash table. */ 1194 init_pragma (); 1195 1196 return true; 1197} 1198 1199/* Initialize the integrated preprocessor after debug output has been 1200 initialized; loop over each input file. */ 1201void 1202c_common_parse_file (int set_yydebug) 1203{ 1204 unsigned int i; 1205 1206 /* Enable parser debugging, if requested and we can. If requested 1207 and we can't, notify the user. */ 1208#if YYDEBUG != 0 1209 yydebug = set_yydebug; 1210#else 1211 if (set_yydebug) 1212 warning (0, "YYDEBUG was not defined at build time, -dy ignored"); 1213#endif 1214 1215 i = 0; 1216 for (;;) 1217 { 1218 /* Start the main input file, if the debug writer wants it. */ 1219 if (debug_hooks->start_end_main_source_file) 1220 (*debug_hooks->start_source_file) (0, this_input_filename); 1221 finish_options (); 1222 pch_init (); 1223 push_file_scope (); 1224 c_parse_file (); 1225 finish_file (); 1226 pop_file_scope (); 1227 /* And end the main input file, if the debug writer wants it */ 1228 if (debug_hooks->start_end_main_source_file) 1229 (*debug_hooks->end_source_file) (0); 1230 if (++i >= num_in_fnames) 1231 break; 1232 cpp_undef_all (parse_in); 1233 this_input_filename 1234 = cpp_read_main_file (parse_in, in_fnames[i]); 1235 /* If an input file is missing, abandon further compilation. 1236 cpplib has issued a diagnostic. */ 1237 if (!this_input_filename) 1238 break; 1239 } 1240} 1241 1242/* Common finish hook for the C, ObjC and C++ front ends. */ 1243void 1244c_common_finish (void) 1245{ 1246 FILE *deps_stream = NULL; 1247 1248 if (cpp_opts->deps.style != DEPS_NONE) 1249 { 1250 /* If -M or -MM was seen without -MF, default output to the 1251 output stream. */ 1252 if (!deps_file) 1253 deps_stream = out_stream; 1254 else 1255 { 1256 deps_stream = fopen (deps_file, deps_append ? "a": "w"); 1257 if (!deps_stream) 1258 fatal_error ("opening dependency file %s: %m", deps_file); 1259 } 1260 } 1261 1262 /* For performance, avoid tearing down cpplib's internal structures 1263 with cpp_destroy (). */ 1264 errorcount += cpp_finish (parse_in, deps_stream); 1265 1266 if (deps_stream && deps_stream != out_stream 1267 && (ferror (deps_stream) || fclose (deps_stream))) 1268 fatal_error ("closing dependency file %s: %m", deps_file); 1269 1270 if (out_stream && (ferror (out_stream) || fclose (out_stream))) 1271 fatal_error ("when writing output to %s: %m", out_fname); 1272} 1273 1274/* Either of two environment variables can specify output of 1275 dependencies. Their value is either "OUTPUT_FILE" or "OUTPUT_FILE 1276 DEPS_TARGET", where OUTPUT_FILE is the file to write deps info to 1277 and DEPS_TARGET is the target to mention in the deps. They also 1278 result in dependency information being appended to the output file 1279 rather than overwriting it, and like Sun's compiler 1280 SUNPRO_DEPENDENCIES suppresses the dependency on the main file. */ 1281static void 1282check_deps_environment_vars (void) 1283{ 1284 char *spec; 1285 1286 GET_ENVIRONMENT (spec, "DEPENDENCIES_OUTPUT"); 1287 if (spec) 1288 cpp_opts->deps.style = DEPS_USER; 1289 else 1290 { 1291 GET_ENVIRONMENT (spec, "SUNPRO_DEPENDENCIES"); 1292 if (spec) 1293 { 1294 cpp_opts->deps.style = DEPS_SYSTEM; 1295 cpp_opts->deps.ignore_main_file = true; 1296 } 1297 } 1298 1299 if (spec) 1300 { 1301 /* Find the space before the DEPS_TARGET, if there is one. */ 1302 char *s = strchr (spec, ' '); 1303 if (s) 1304 { 1305 /* Let the caller perform MAKE quoting. */ 1306 defer_opt (OPT_MT, s + 1); 1307 *s = '\0'; 1308 } 1309 1310 /* Command line -MF overrides environment variables and default. */ 1311 if (!deps_file) 1312 deps_file = spec; 1313 1314 deps_append = 1; 1315 deps_seen = true; 1316 } 1317} 1318 1319/* Handle deferred command line switches. */ 1320static void 1321handle_deferred_opts (void) 1322{ 1323 size_t i; 1324 struct deps *deps; 1325 1326 /* Avoid allocating the deps buffer if we don't need it. 1327 (This flag may be true without there having been -MT or -MQ 1328 options, but we'll still need the deps buffer.) */ 1329 if (!deps_seen) 1330 return; 1331 1332 deps = cpp_get_deps (parse_in); 1333 1334 for (i = 0; i < deferred_count; i++) 1335 { 1336 struct deferred_opt *opt = &deferred_opts[i]; 1337 1338 if (opt->code == OPT_MT || opt->code == OPT_MQ) 1339 deps_add_target (deps, opt->arg, opt->code == OPT_MQ); 1340 } 1341} 1342 1343/* These settings are appropriate for GCC, but not necessarily so for 1344 cpplib as a library. */ 1345static void 1346sanitize_cpp_opts (void) 1347{ 1348 /* If we don't know what style of dependencies to output, complain 1349 if any other dependency switches have been given. */ 1350 if (deps_seen && cpp_opts->deps.style == DEPS_NONE) 1351 error ("to generate dependencies you must specify either -M or -MM"); 1352 1353 /* -dM and dependencies suppress normal output; do it here so that 1354 the last -d[MDN] switch overrides earlier ones. */ 1355 if (flag_dump_macros == 'M') 1356 flag_no_output = 1; 1357 1358 /* By default, -fdirectives-only implies -dD. This allows subsequent phases 1359 to perform proper macro expansion. */ 1360 if (cpp_opts->directives_only && !cpp_opts->preprocessed && !flag_dump_macros) 1361 flag_dump_macros = 'D'; 1362 1363 /* Disable -dD, -dN and -dI if normal output is suppressed. Allow 1364 -dM since at least glibc relies on -M -dM to work. */ 1365 /* Also, flag_no_output implies flag_no_line_commands, always. */ 1366 if (flag_no_output) 1367 { 1368 if (flag_dump_macros != 'M') 1369 flag_dump_macros = 0; 1370 flag_dump_includes = 0; 1371 flag_no_line_commands = 1; 1372 } 1373 1374 cpp_opts->unsigned_char = !flag_signed_char; 1375 cpp_opts->stdc_0_in_system_headers = STDC_0_IN_SYSTEM_HEADERS; 1376 1377 /* We want -Wno-long-long to override -pedantic -std=non-c99 1378 and/or -Wtraditional, whatever the ordering. */ 1379 cpp_opts->warn_long_long 1380 = warn_long_long && ((!flag_isoc99 && pedantic) || warn_traditional); 1381 1382 /* Similarly with -Wno-variadic-macros. No check for c99 here, since 1383 this also turns off warnings about GCCs extension. */ 1384 cpp_opts->warn_variadic_macros 1385 = warn_variadic_macros && (pedantic || warn_traditional); 1386 1387 /* If we're generating preprocessor output, emit current directory 1388 if explicitly requested or if debugging information is enabled. 1389 ??? Maybe we should only do it for debugging formats that 1390 actually output the current directory? */ 1391 if (flag_working_directory == -1) 1392 flag_working_directory = (debug_info_level != DINFO_LEVEL_NONE); 1393 1394 if (cpp_opts->directives_only) 1395 { 1396 if (warn_unused_macros) 1397 error ("-fdirectives-only is incompatible with -Wunused_macros"); 1398 if (cpp_opts->traditional) 1399 error ("-fdirectives-only is incompatible with -traditional"); 1400 } 1401} 1402 1403/* Add include path with a prefix at the front of its name. */ 1404static void 1405add_prefixed_path (const char *suffix, size_t chain) 1406{ 1407 char *path; 1408 const char *prefix; 1409 size_t prefix_len, suffix_len; 1410 1411 suffix_len = strlen (suffix); 1412 prefix = iprefix ? iprefix : cpp_GCC_INCLUDE_DIR; 1413 prefix_len = iprefix ? strlen (iprefix) : cpp_GCC_INCLUDE_DIR_len; 1414 1415 path = (char *) xmalloc (prefix_len + suffix_len + 1); 1416 memcpy (path, prefix, prefix_len); 1417 memcpy (path + prefix_len, suffix, suffix_len); 1418 path[prefix_len + suffix_len] = '\0'; 1419 1420 add_path (path, chain, 0, false); 1421} 1422 1423/* Handle -D, -U, -A, -imacros, and the first -include. */ 1424static void 1425finish_options (void) 1426{ 1427 if (!cpp_opts->preprocessed) 1428 { 1429 size_t i; 1430 1431 cb_file_change (parse_in, 1432 linemap_add (&line_table, LC_RENAME, 0, 1433 _("<built-in>"), 0)); 1434 1435 cpp_init_builtins (parse_in, flag_hosted); 1436 c_cpp_builtins (parse_in); 1437 1438 /* We're about to send user input to cpplib, so make it warn for 1439 things that we previously (when we sent it internal definitions) 1440 told it to not warn. 1441 1442 C99 permits implementation-defined characters in identifiers. 1443 The documented meaning of -std= is to turn off extensions that 1444 conflict with the specified standard, and since a strictly 1445 conforming program cannot contain a '$', we do not condition 1446 their acceptance on the -std= setting. */ 1447 cpp_opts->warn_dollars = (cpp_opts->pedantic && !cpp_opts->c99); 1448 1449 cb_file_change (parse_in, 1450 linemap_add (&line_table, LC_RENAME, 0, 1451 _("<command-line>"), 0)); 1452 1453 for (i = 0; i < deferred_count; i++) 1454 { 1455 struct deferred_opt *opt = &deferred_opts[i]; 1456 1457 if (opt->code == OPT_D) 1458 cpp_define (parse_in, opt->arg); 1459 else if (opt->code == OPT_U) 1460 cpp_undef (parse_in, opt->arg); 1461 else if (opt->code == OPT_A) 1462 { 1463 if (opt->arg[0] == '-') 1464 cpp_unassert (parse_in, opt->arg + 1); 1465 else 1466 cpp_assert (parse_in, opt->arg); 1467 } 1468 } 1469 1470 /* Handle -imacros after -D and -U. */ 1471 for (i = 0; i < deferred_count; i++) 1472 { 1473 struct deferred_opt *opt = &deferred_opts[i]; 1474 1475 if (opt->code == OPT_imacros 1476 && cpp_push_include (parse_in, opt->arg)) 1477 { 1478 /* Disable push_command_line_include callback for now. */ 1479 include_cursor = deferred_count + 1; 1480 cpp_scan_nooutput (parse_in); 1481 } 1482 } 1483 } 1484 else if (cpp_opts->directives_only) 1485 cpp_init_special_builtins (parse_in); 1486 1487 include_cursor = 0; 1488 push_command_line_include (); 1489} 1490 1491/* Give CPP the next file given by -include, if any. */ 1492static void 1493push_command_line_include (void) 1494{ 1495 while (include_cursor < deferred_count) 1496 { 1497 struct deferred_opt *opt = &deferred_opts[include_cursor++]; 1498 1499 if (!cpp_opts->preprocessed && opt->code == OPT_include 1500 && cpp_push_include (parse_in, opt->arg)) 1501 return; 1502 } 1503 1504 if (include_cursor == deferred_count) 1505 { 1506 include_cursor++; 1507 /* -Wunused-macros should only warn about macros defined hereafter. */ 1508 cpp_opts->warn_unused_macros = warn_unused_macros; 1509 /* Restore the line map from <command line>. */ 1510 if (!cpp_opts->preprocessed) 1511 cpp_change_file (parse_in, LC_RENAME, this_input_filename); 1512 1513 /* Set this here so the client can change the option if it wishes, 1514 and after stacking the main file so we don't trace the main file. */ 1515 line_table.trace_includes = cpp_opts->print_include_names; 1516 } 1517} 1518 1519/* File change callback. Has to handle -include files. */ 1520static void 1521cb_file_change (cpp_reader * ARG_UNUSED (pfile), 1522 const struct line_map *new_map) 1523{ 1524 if (flag_preprocess_only) 1525 pp_file_change (new_map); 1526 else 1527 fe_file_change (new_map); 1528 1529 if (new_map == 0 || (new_map->reason == LC_LEAVE && MAIN_FILE_P (new_map))) 1530 push_command_line_include (); 1531} 1532 1533void 1534cb_dir_change (cpp_reader * ARG_UNUSED (pfile), const char *dir) 1535{ 1536 if (!set_src_pwd (dir)) 1537 warning (0, "too late for # directive to set debug directory"); 1538} 1539 1540/* Set the C 89 standard (with 1994 amendments if C94, without GNU 1541 extensions if ISO). There is no concept of gnu94. */ 1542static void 1543set_std_c89 (int c94, int iso) 1544{ 1545 cpp_set_lang (parse_in, c94 ? CLK_STDC94: iso ? CLK_STDC89: CLK_GNUC89); 1546 flag_iso = iso; 1547 flag_no_asm = iso; 1548 flag_no_gnu_keywords = iso; 1549 flag_no_nonansi_builtin = iso; 1550 flag_isoc94 = c94; 1551 flag_isoc99 = 0; 1552} 1553 1554/* Set the C 99 standard (without GNU extensions if ISO). */ 1555static void 1556set_std_c99 (int iso) 1557{ 1558 cpp_set_lang (parse_in, iso ? CLK_STDC99: CLK_GNUC99); 1559 flag_no_asm = iso; 1560 flag_no_nonansi_builtin = iso; 1561 flag_iso = iso; 1562 flag_isoc99 = 1; 1563 flag_isoc94 = 1; 1564} 1565 1566/* Set the C++ 98 standard (without GNU extensions if ISO). */ 1567static void 1568set_std_cxx98 (int iso) 1569{ 1570 cpp_set_lang (parse_in, iso ? CLK_CXX98: CLK_GNUCXX); 1571 flag_no_gnu_keywords = iso; 1572 flag_no_nonansi_builtin = iso; 1573 flag_iso = iso; 1574} 1575 1576/* Handle setting implicit to ON. */ 1577static void 1578set_Wimplicit (int on) 1579{ 1580 warn_implicit = on; 1581 warn_implicit_int = on; 1582 if (on) 1583 { 1584 if (mesg_implicit_function_declaration != 2) 1585 mesg_implicit_function_declaration = 1; 1586 } 1587 else 1588 mesg_implicit_function_declaration = 0; 1589} 1590 1591/* Args to -d specify what to dump. Silently ignore 1592 unrecognized options; they may be aimed at toplev.c. */ 1593static void 1594handle_OPT_d (const char *arg) 1595{ 1596 char c; 1597 1598 while ((c = *arg++) != '\0') 1599 switch (c) 1600 { 1601 case 'M': /* Dump macros only. */ 1602 case 'N': /* Dump names. */ 1603 case 'D': /* Dump definitions. */ 1604 flag_dump_macros = c; 1605 break; 1606 1607 case 'I': 1608 flag_dump_includes = 1; 1609 break; 1610 } 1611} 1612