1132718Skan/* Command line option handling. 2169703Skan Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 3169703Skan Free Software Foundation, Inc. 4132718Skan Contributed by Neil Booth. 5132718Skan 6132718SkanThis file is part of GCC. 7132718Skan 8132718SkanGCC is free software; you can redistribute it and/or modify it under 9132718Skanthe terms of the GNU General Public License as published by the Free 10132718SkanSoftware Foundation; either version 2, or (at your option) any later 11132718Skanversion. 12132718Skan 13132718SkanGCC is distributed in the hope that it will be useful, but WITHOUT ANY 14132718SkanWARRANTY; without even the implied warranty of MERCHANTABILITY or 15132718SkanFITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 16132718Skanfor more details. 17132718Skan 18132718SkanYou should have received a copy of the GNU General Public License 19132718Skanalong with GCC; see the file COPYING. If not, write to the Free 20169703SkanSoftware Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 21169703Skan02110-1301, USA. */ 22132718Skan 23132735Skan/* $FreeBSD$ */ 24132735Skan 25132718Skan#include "config.h" 26132718Skan#include "system.h" 27132718Skan#include "intl.h" 28132718Skan#include "coretypes.h" 29132718Skan#include "tm.h" 30132718Skan#include "tree.h" 31132718Skan#include "rtl.h" 32132718Skan#include "ggc.h" 33132718Skan#include "output.h" 34132718Skan#include "langhooks.h" 35132718Skan#include "opts.h" 36132718Skan#include "options.h" 37132718Skan#include "flags.h" 38132718Skan#include "toplev.h" 39132718Skan#include "params.h" 40132718Skan#include "diagnostic.h" 41132718Skan#include "tm_p.h" /* For OPTIMIZATION_OPTIONS. */ 42132718Skan#include "insn-attr.h" /* For INSN_SCHEDULING. */ 43169703Skan#include "target.h" 44169703Skan#include "tree-pass.h" 45132718Skan 46132718Skan/* Value of the -G xx switch, and whether it was passed or not. */ 47132718Skanunsigned HOST_WIDE_INT g_switch_value; 48132718Skanbool g_switch_set; 49132718Skan 50132718Skan/* True if we should exit after parsing options. */ 51132718Skanbool exit_after_options; 52132718Skan 53132718Skan/* Print various extra warnings. -W/-Wextra. */ 54132718Skanbool extra_warnings; 55132718Skan 56132718Skan/* True to warn about any objects definitions whose size is larger 57132718Skan than N bytes. Also want about function definitions whose returned 58132718Skan values are larger than N bytes, where N is `larger_than_size'. */ 59132718Skanbool warn_larger_than; 60132718SkanHOST_WIDE_INT larger_than_size; 61132718Skan 62259405Spfg/* True to warn about any function whose frame size is larger 63259405Spfg * than N bytes. */ 64259405Spfgbool warn_frame_larger_than; 65259405SpfgHOST_WIDE_INT frame_larger_than_size; 66259405Spfg 67132718Skan/* Nonzero means warn about constructs which might not be 68132718Skan strict-aliasing safe. */ 69169703Skanint warn_strict_aliasing; 70132718Skan 71169703Skan/* Nonzero means warn about optimizations which rely on undefined 72169703Skan signed overflow. */ 73169703Skanint warn_strict_overflow; 74132718Skan 75132718Skan/* Hack for cooperation between set_Wunused and set_Wextra. */ 76132718Skanstatic bool maybe_warn_unused_parameter; 77132718Skan 78132718Skan/* Type(s) of debugging information we are producing (if any). See 79132718Skan flags.h for the definitions of the different possible types of 80132718Skan debugging information. */ 81132718Skanenum debug_info_type write_symbols = NO_DEBUG; 82132718Skan 83132718Skan/* Level of debugging information we are producing. See flags.h for 84132718Skan the definitions of the different possible levels. */ 85132718Skanenum debug_info_level debug_info_level = DINFO_LEVEL_NONE; 86132718Skan 87259268Spfg/* A major contribution to object and executable size is debug 88259268Spfg information size. A major contribution to debug information size 89259268Spfg is struct descriptions replicated in several object files. The 90259268Spfg following flags attempt to reduce this information. The basic 91259268Spfg idea is to not emit struct debugging information in the current 92259268Spfg compilation unit when that information will be generated by 93259268Spfg another compilation unit. 94259268Spfg 95259268Spfg Debug information for a struct defined in the current source 96259268Spfg file should be generated in the object file. Likewise the 97259268Spfg debug information for a struct defined in a header should be 98259268Spfg generated in the object file of the corresponding source file. 99259268Spfg Both of these case are handled when the base name of the file of 100259268Spfg the struct definition matches the base name of the source file 101259268Spfg of thet current compilation unit. This matching emits minimal 102259268Spfg struct debugging information. 103259268Spfg 104259268Spfg The base file name matching rule above will fail to emit debug 105259268Spfg information for structs defined in system headers. So a second 106259268Spfg category of files includes system headers in addition to files 107259268Spfg with matching bases. 108259268Spfg 109259268Spfg The remaining types of files are library headers and application 110259268Spfg headers. We cannot currently distinguish these two types. */ 111259268Spfg 112259268Spfgenum debug_struct_file 113259268Spfg{ 114259268Spfg DINFO_STRUCT_FILE_NONE, /* Debug no structs. */ 115259268Spfg DINFO_STRUCT_FILE_BASE, /* Debug structs defined in files with the 116259268Spfg same base name as the compilation unit. */ 117259268Spfg DINFO_STRUCT_FILE_SYS, /* Also debug structs defined in system 118259268Spfg header files. */ 119259268Spfg DINFO_STRUCT_FILE_ANY /* Debug structs defined in all files. */ 120259268Spfg}; 121259268Spfg 122259268Spfg/* Generic structs (e.g. templates not explicitly specialized) 123259268Spfg may not have a compilation unit associated with them, and so 124259268Spfg may need to be treated differently from ordinary structs. 125259268Spfg 126259268Spfg Structs only handled by reference (indirectly), will also usually 127259268Spfg not need as much debugging information. */ 128259268Spfg 129259268Spfgstatic enum debug_struct_file debug_struct_ordinary[DINFO_USAGE_NUM_ENUMS] 130259268Spfg = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY }; 131259268Spfgstatic enum debug_struct_file debug_struct_generic[DINFO_USAGE_NUM_ENUMS] 132259268Spfg = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY }; 133259268Spfg 134259268Spfg/* Parse the -femit-struct-debug-detailed option value 135259268Spfg and set the flag variables. */ 136259268Spfg 137259268Spfg#define MATCH( prefix, string ) \ 138259268Spfg ((strncmp (prefix, string, sizeof prefix - 1) == 0) \ 139259268Spfg ? ((string += sizeof prefix - 1), 1) : 0) 140259268Spfg 141259268Spfgvoid 142259268Spfgset_struct_debug_option (const char *spec) 143259268Spfg{ 144259268Spfg /* various labels for comparison */ 145259268Spfg static char dfn_lbl[] = "dfn:", dir_lbl[] = "dir:", ind_lbl[] = "ind:"; 146259268Spfg static char ord_lbl[] = "ord:", gen_lbl[] = "gen:"; 147259268Spfg static char none_lbl[] = "none", any_lbl[] = "any"; 148259268Spfg static char base_lbl[] = "base", sys_lbl[] = "sys"; 149259268Spfg 150259268Spfg enum debug_struct_file files = DINFO_STRUCT_FILE_ANY; 151259268Spfg /* Default is to apply to as much as possible. */ 152259268Spfg enum debug_info_usage usage = DINFO_USAGE_NUM_ENUMS; 153259268Spfg int ord = 1, gen = 1; 154259268Spfg 155259268Spfg /* What usage? */ 156259268Spfg if (MATCH (dfn_lbl, spec)) 157259268Spfg usage = DINFO_USAGE_DFN; 158259268Spfg else if (MATCH (dir_lbl, spec)) 159259268Spfg usage = DINFO_USAGE_DIR_USE; 160259268Spfg else if (MATCH (ind_lbl, spec)) 161259268Spfg usage = DINFO_USAGE_IND_USE; 162259268Spfg 163259268Spfg /* Generics or not? */ 164259268Spfg if (MATCH (ord_lbl, spec)) 165259268Spfg gen = 0; 166259268Spfg else if (MATCH (gen_lbl, spec)) 167259268Spfg ord = 0; 168259268Spfg 169259268Spfg /* What allowable environment? */ 170259268Spfg if (MATCH (none_lbl, spec)) 171259268Spfg files = DINFO_STRUCT_FILE_NONE; 172259268Spfg else if (MATCH (any_lbl, spec)) 173259268Spfg files = DINFO_STRUCT_FILE_ANY; 174259268Spfg else if (MATCH (sys_lbl, spec)) 175259268Spfg files = DINFO_STRUCT_FILE_SYS; 176259268Spfg else if (MATCH (base_lbl, spec)) 177259268Spfg files = DINFO_STRUCT_FILE_BASE; 178259268Spfg else 179259268Spfg error ("argument %qs to %<-femit-struct-debug-detailed%> not recognized", 180259268Spfg spec); 181259268Spfg 182259268Spfg /* Effect the specification. */ 183259268Spfg if (usage == DINFO_USAGE_NUM_ENUMS) 184259268Spfg { 185259268Spfg if (ord) 186259268Spfg { 187259268Spfg debug_struct_ordinary[DINFO_USAGE_DFN] = files; 188259268Spfg debug_struct_ordinary[DINFO_USAGE_DIR_USE] = files; 189259268Spfg debug_struct_ordinary[DINFO_USAGE_IND_USE] = files; 190259268Spfg } 191259268Spfg if (gen) 192259268Spfg { 193259268Spfg debug_struct_generic[DINFO_USAGE_DFN] = files; 194259268Spfg debug_struct_generic[DINFO_USAGE_DIR_USE] = files; 195259268Spfg debug_struct_generic[DINFO_USAGE_IND_USE] = files; 196259268Spfg } 197259268Spfg } 198259268Spfg else 199259268Spfg { 200259268Spfg if (ord) 201259268Spfg debug_struct_ordinary[usage] = files; 202259268Spfg if (gen) 203259268Spfg debug_struct_generic[usage] = files; 204259268Spfg } 205259268Spfg 206259268Spfg if (*spec == ',') 207259268Spfg set_struct_debug_option (spec+1); 208259268Spfg else 209259268Spfg { 210259268Spfg /* No more -femit-struct-debug-detailed specifications. 211259268Spfg Do final checks. */ 212259268Spfg if (*spec != '\0') 213259268Spfg error ("argument %qs to %<-femit-struct-debug-detailed%> unknown", 214259268Spfg spec); 215259268Spfg if (debug_struct_ordinary[DINFO_USAGE_DIR_USE] 216259268Spfg < debug_struct_ordinary[DINFO_USAGE_IND_USE] 217259268Spfg || debug_struct_generic[DINFO_USAGE_DIR_USE] 218259268Spfg < debug_struct_generic[DINFO_USAGE_IND_USE]) 219259268Spfg error ("%<-femit-struct-debug-detailed=dir:...%> must allow at least" 220259268Spfg " as much as %<-femit-struct-debug-detailed=ind:...%>"); 221259268Spfg } 222259268Spfg} 223259268Spfg 224259268Spfg/* Find the base name of a path, stripping off both directories and 225259268Spfg a single final extension. */ 226259268Spfgstatic int 227259268Spfgbase_of_path (const char *path, const char **base_out) 228259268Spfg{ 229259268Spfg const char *base = path; 230259268Spfg const char *dot = 0; 231259268Spfg const char *p = path; 232259268Spfg char c = *p; 233259268Spfg while (c) 234259268Spfg { 235259268Spfg if (IS_DIR_SEPARATOR(c)) 236259268Spfg { 237259268Spfg base = p + 1; 238259268Spfg dot = 0; 239259268Spfg } 240259268Spfg else if (c == '.') 241259268Spfg dot = p; 242259268Spfg c = *++p; 243259268Spfg } 244259268Spfg if (!dot) 245259268Spfg dot = p; 246259268Spfg *base_out = base; 247259268Spfg return dot - base; 248259268Spfg} 249259268Spfg 250259268Spfg/* Match the base name of a file to the base name of a compilation unit. */ 251259268Spfg 252259268Spfgstatic const char *main_input_basename; 253259268Spfgstatic int main_input_baselength; 254259268Spfg 255259268Spfgstatic int 256259268Spfgmatches_main_base (const char *path) 257259268Spfg{ 258259268Spfg /* Cache the last query. */ 259259268Spfg static const char *last_path = NULL; 260259268Spfg static int last_match = 0; 261259268Spfg if (path != last_path) 262259268Spfg { 263259268Spfg const char *base; 264259268Spfg int length = base_of_path (path, &base); 265259268Spfg last_path = path; 266259268Spfg last_match = (length == main_input_baselength 267259268Spfg && memcmp (base, main_input_basename, length) == 0); 268259268Spfg } 269259268Spfg return last_match; 270259268Spfg} 271259268Spfg 272259268Spfg#ifdef DEBUG_DEBUG_STRUCT 273259268Spfg 274259268Spfgstatic int 275259268Spfgdump_struct_debug (tree type, enum debug_info_usage usage, 276259268Spfg enum debug_struct_file criterion, int generic, 277259268Spfg int matches, int result) 278259268Spfg{ 279259268Spfg /* Find the type name. */ 280259268Spfg tree type_decl = TYPE_STUB_DECL (type); 281259268Spfg tree t = type_decl; 282259268Spfg const char *name = 0; 283259268Spfg if (TREE_CODE (t) == TYPE_DECL) 284259268Spfg t = DECL_NAME (t); 285259268Spfg if (t) 286259268Spfg name = IDENTIFIER_POINTER (t); 287259268Spfg 288259268Spfg fprintf (stderr, " struct %d %s %s %s %s %d %p %s\n", 289259268Spfg criterion, 290259268Spfg DECL_IN_SYSTEM_HEADER (type_decl) ? "sys" : "usr", 291259268Spfg matches ? "bas" : "hdr", 292259268Spfg generic ? "gen" : "ord", 293259268Spfg usage == DINFO_USAGE_DFN ? ";" : 294259268Spfg usage == DINFO_USAGE_DIR_USE ? "." : "*", 295259268Spfg result, 296259268Spfg (void*) type_decl, name); 297259268Spfg return result; 298259268Spfg} 299259268Spfg#define DUMP_GSTRUCT(type, usage, criterion, generic, matches, result) \ 300259268Spfg dump_struct_debug (type, usage, criterion, generic, matches, result) 301259268Spfg 302259268Spfg#else 303259268Spfg 304259268Spfg#define DUMP_GSTRUCT(type, usage, criterion, generic, matches, result) \ 305259268Spfg (result) 306259268Spfg 307259268Spfg#endif 308259268Spfg 309259268Spfg 310259268Spfgbool 311259268Spfgshould_emit_struct_debug (tree type, enum debug_info_usage usage) 312259268Spfg{ 313259268Spfg enum debug_struct_file criterion; 314259268Spfg tree type_decl; 315259268Spfg bool generic = lang_hooks.types.generic_p (type); 316259268Spfg 317259268Spfg if (generic) 318259268Spfg criterion = debug_struct_generic[usage]; 319259268Spfg else 320259268Spfg criterion = debug_struct_ordinary[usage]; 321259268Spfg 322259268Spfg if (criterion == DINFO_STRUCT_FILE_NONE) 323259268Spfg return DUMP_GSTRUCT (type, usage, criterion, generic, false, false); 324259268Spfg if (criterion == DINFO_STRUCT_FILE_ANY) 325259268Spfg return DUMP_GSTRUCT (type, usage, criterion, generic, false, true); 326259268Spfg 327259268Spfg type_decl = TYPE_STUB_DECL (type); 328259268Spfg 329259268Spfg if (criterion == DINFO_STRUCT_FILE_SYS && DECL_IN_SYSTEM_HEADER (type_decl)) 330259268Spfg return DUMP_GSTRUCT (type, usage, criterion, generic, false, true); 331259268Spfg 332259268Spfg if (matches_main_base (DECL_SOURCE_FILE (type_decl))) 333259268Spfg return DUMP_GSTRUCT (type, usage, criterion, generic, true, true); 334259268Spfg return DUMP_GSTRUCT (type, usage, criterion, generic, false, false); 335259268Spfg} 336259268Spfg 337132718Skan/* Nonzero means use GNU-only extensions in the generated symbolic 338132718Skan debugging information. Currently, this only has an effect when 339132718Skan write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */ 340132718Skanbool use_gnu_debug_info_extensions; 341132718Skan 342169703Skan/* The default visibility for all symbols (unless overridden) */ 343169703Skanenum symbol_visibility default_visibility = VISIBILITY_DEFAULT; 344169703Skan 345169703Skan/* Disable unit-at-a-time for frontends that might be still broken in this 346169703Skan respect. */ 347169703Skan 348169703Skanbool no_unit_at_a_time_default; 349169703Skan 350169703Skan/* Global visibility options. */ 351169703Skanstruct visibility_flags visibility_options; 352169703Skan 353132718Skan/* Columns of --help display. */ 354132718Skanstatic unsigned int columns = 80; 355132718Skan 356132718Skan/* What to print when a switch has no documentation. */ 357132718Skanstatic const char undocumented_msg[] = N_("This switch lacks documentation"); 358132718Skan 359132718Skan/* Used for bookkeeping on whether user set these flags so 360132718Skan -fprofile-use/-fprofile-generate does not use them. */ 361132718Skanstatic bool profile_arc_flag_set, flag_profile_values_set; 362132718Skanstatic bool flag_unroll_loops_set, flag_tracer_set; 363132718Skanstatic bool flag_value_profile_transformations_set; 364132718Skanstatic bool flag_peel_loops_set, flag_branch_probabilities_set; 365132718Skan 366259405Spfg/* Functions excluded from profiling. */ 367259405Spfg 368259405Spfgtypedef char *char_p; /* For DEF_VEC_P. */ 369259405SpfgDEF_VEC_P(char_p); 370259405SpfgDEF_VEC_ALLOC_P(char_p,heap); 371259405Spfg 372259405Spfgstatic VEC(char_p,heap) *flag_instrument_functions_exclude_functions; 373259405Spfgstatic VEC(char_p,heap) *flag_instrument_functions_exclude_files; 374259405Spfg 375132718Skan/* Input file names. */ 376132718Skanconst char **in_fnames; 377132718Skanunsigned num_in_fnames; 378132718Skan 379169703Skanstatic int common_handle_option (size_t scode, const char *arg, int value, 380169703Skan unsigned int lang_mask); 381132718Skanstatic void handle_param (const char *); 382132718Skanstatic void set_Wextra (int); 383132718Skanstatic unsigned int handle_option (const char **argv, unsigned int lang_mask); 384132718Skanstatic char *write_langs (unsigned int lang_mask); 385132718Skanstatic void complain_wrong_lang (const char *, const struct cl_option *, 386132718Skan unsigned int lang_mask); 387132718Skanstatic void handle_options (unsigned int, const char **, unsigned int); 388132718Skanstatic void wrap_help (const char *help, const char *item, unsigned int); 389169703Skanstatic void print_target_help (void); 390132718Skanstatic void print_help (void); 391132718Skanstatic void print_param_help (void); 392169703Skanstatic void print_filtered_help (unsigned int); 393132718Skanstatic unsigned int print_switch (const char *text, unsigned int indent); 394132718Skanstatic void set_debug_level (enum debug_info_type type, int extended, 395132718Skan const char *arg); 396132718Skan 397132718Skan/* If ARG is a non-negative integer made up solely of digits, return its 398132718Skan value, otherwise return -1. */ 399132718Skanstatic int 400132718Skanintegral_argument (const char *arg) 401132718Skan{ 402132718Skan const char *p = arg; 403132718Skan 404132718Skan while (*p && ISDIGIT (*p)) 405132718Skan p++; 406132718Skan 407132718Skan if (*p == '\0') 408132718Skan return atoi (arg); 409132718Skan 410132718Skan return -1; 411132718Skan} 412132718Skan 413132718Skan/* Return a malloced slash-separated list of languages in MASK. */ 414132718Skanstatic char * 415132718Skanwrite_langs (unsigned int mask) 416132718Skan{ 417132718Skan unsigned int n = 0, len = 0; 418132718Skan const char *lang_name; 419132718Skan char *result; 420132718Skan 421132718Skan for (n = 0; (lang_name = lang_names[n]) != 0; n++) 422132718Skan if (mask & (1U << n)) 423132718Skan len += strlen (lang_name) + 1; 424132718Skan 425169703Skan result = XNEWVEC (char, len); 426132718Skan len = 0; 427132718Skan for (n = 0; (lang_name = lang_names[n]) != 0; n++) 428132718Skan if (mask & (1U << n)) 429132718Skan { 430132718Skan if (len) 431132718Skan result[len++] = '/'; 432132718Skan strcpy (result + len, lang_name); 433132718Skan len += strlen (lang_name); 434132718Skan } 435132718Skan 436132718Skan result[len] = 0; 437132718Skan 438132718Skan return result; 439132718Skan} 440132718Skan 441132718Skan/* Complain that switch OPT_INDEX does not apply to this front end. */ 442132718Skanstatic void 443132718Skancomplain_wrong_lang (const char *text, const struct cl_option *option, 444132718Skan unsigned int lang_mask) 445132718Skan{ 446132718Skan char *ok_langs, *bad_lang; 447132718Skan 448132718Skan ok_langs = write_langs (option->flags); 449132718Skan bad_lang = write_langs (lang_mask); 450132718Skan 451132718Skan /* Eventually this should become a hard error IMO. */ 452169703Skan warning (0, "command line option \"%s\" is valid for %s but not for %s", 453132718Skan text, ok_langs, bad_lang); 454132718Skan 455132718Skan free (ok_langs); 456132718Skan free (bad_lang); 457132718Skan} 458132718Skan 459132718Skan/* Handle the switch beginning at ARGV for the language indicated by 460132718Skan LANG_MASK. Returns the number of switches consumed. */ 461132718Skanstatic unsigned int 462132718Skanhandle_option (const char **argv, unsigned int lang_mask) 463132718Skan{ 464132718Skan size_t opt_index; 465132718Skan const char *opt, *arg = 0; 466132718Skan char *dup = 0; 467132718Skan int value = 1; 468132718Skan unsigned int result = 0; 469132718Skan const struct cl_option *option; 470132718Skan 471132718Skan opt = argv[0]; 472132718Skan 473169703Skan opt_index = find_opt (opt + 1, lang_mask | CL_COMMON | CL_TARGET); 474169703Skan if (opt_index == cl_options_count 475169703Skan && (opt[1] == 'W' || opt[1] == 'f' || opt[1] == 'm') 476132718Skan && opt[2] == 'n' && opt[3] == 'o' && opt[4] == '-') 477132718Skan { 478169703Skan /* Drop the "no-" from negative switches. */ 479132718Skan size_t len = strlen (opt) - 3; 480132718Skan 481169703Skan dup = XNEWVEC (char, len + 1); 482132718Skan dup[0] = '-'; 483132718Skan dup[1] = opt[1]; 484132718Skan memcpy (dup + 2, opt + 5, len - 2 + 1); 485132718Skan opt = dup; 486132718Skan value = 0; 487169703Skan opt_index = find_opt (opt + 1, lang_mask | CL_COMMON | CL_TARGET); 488132718Skan } 489132718Skan 490132718Skan if (opt_index == cl_options_count) 491132718Skan goto done; 492132718Skan 493132718Skan option = &cl_options[opt_index]; 494132718Skan 495132718Skan /* Reject negative form of switches that don't take negatives as 496132718Skan unrecognized. */ 497132718Skan if (!value && (option->flags & CL_REJECT_NEGATIVE)) 498132718Skan goto done; 499132718Skan 500132718Skan /* We've recognized this switch. */ 501132718Skan result = 1; 502132718Skan 503169703Skan /* Check to see if the option is disabled for this configuration. */ 504169703Skan if (option->flags & CL_DISABLED) 505169703Skan { 506169703Skan error ("command line option %qs" 507169703Skan " is not supported by this configuration", opt); 508169703Skan goto done; 509169703Skan } 510169703Skan 511132718Skan /* Sort out any argument the switch takes. */ 512132718Skan if (option->flags & CL_JOINED) 513132718Skan { 514132718Skan /* Have arg point to the original switch. This is because 515132718Skan some code, such as disable_builtin_function, expects its 516132718Skan argument to be persistent until the program exits. */ 517132718Skan arg = argv[0] + cl_options[opt_index].opt_len + 1; 518132718Skan if (!value) 519132718Skan arg += strlen ("no-"); 520132718Skan 521132718Skan if (*arg == '\0' && !(option->flags & CL_MISSING_OK)) 522132718Skan { 523132718Skan if (option->flags & CL_SEPARATE) 524132718Skan { 525132718Skan arg = argv[1]; 526132718Skan result = 2; 527132718Skan } 528132718Skan else 529132718Skan /* Missing argument. */ 530132718Skan arg = NULL; 531132718Skan } 532132718Skan } 533132718Skan else if (option->flags & CL_SEPARATE) 534132718Skan { 535132718Skan arg = argv[1]; 536132718Skan result = 2; 537132718Skan } 538132718Skan 539132718Skan /* Now we've swallowed any potential argument, complain if this 540132718Skan is a switch for a different front end. */ 541169703Skan if (!(option->flags & (lang_mask | CL_COMMON | CL_TARGET))) 542132718Skan { 543132718Skan complain_wrong_lang (argv[0], option, lang_mask); 544132718Skan goto done; 545132718Skan } 546132718Skan 547132718Skan if (arg == NULL && (option->flags & (CL_JOINED | CL_SEPARATE))) 548132718Skan { 549169703Skan if (!lang_hooks.missing_argument (opt, opt_index)) 550132718Skan error ("missing argument to \"%s\"", opt); 551132718Skan goto done; 552132718Skan } 553132718Skan 554132718Skan /* If the switch takes an integer, convert it. */ 555132718Skan if (arg && (option->flags & CL_UINTEGER)) 556132718Skan { 557132718Skan value = integral_argument (arg); 558132718Skan if (value == -1) 559132718Skan { 560132718Skan error ("argument to \"%s\" should be a non-negative integer", 561132718Skan option->opt_text); 562132718Skan goto done; 563132718Skan } 564132718Skan } 565132718Skan 566169703Skan if (option->flag_var) 567169703Skan switch (option->var_type) 568169703Skan { 569169703Skan case CLVC_BOOLEAN: 570169703Skan *(int *) option->flag_var = value; 571169703Skan break; 572169703Skan 573169703Skan case CLVC_EQUAL: 574169703Skan *(int *) option->flag_var = (value 575169703Skan ? option->var_value 576169703Skan : !option->var_value); 577169703Skan break; 578169703Skan 579169703Skan case CLVC_BIT_CLEAR: 580169703Skan case CLVC_BIT_SET: 581169703Skan if ((value != 0) == (option->var_type == CLVC_BIT_SET)) 582169703Skan *(int *) option->flag_var |= option->var_value; 583169703Skan else 584169703Skan *(int *) option->flag_var &= ~option->var_value; 585169703Skan if (option->flag_var == &target_flags) 586169703Skan target_flags_explicit |= option->var_value; 587169703Skan break; 588169703Skan 589169703Skan case CLVC_STRING: 590169703Skan *(const char **) option->flag_var = arg; 591169703Skan break; 592169703Skan } 593169703Skan 594132718Skan if (option->flags & lang_mask) 595169703Skan if (lang_hooks.handle_option (opt_index, arg, value) == 0) 596132718Skan result = 0; 597132718Skan 598132718Skan if (result && (option->flags & CL_COMMON)) 599169703Skan if (common_handle_option (opt_index, arg, value, lang_mask) == 0) 600132718Skan result = 0; 601132718Skan 602169703Skan if (result && (option->flags & CL_TARGET)) 603169703Skan if (!targetm.handle_option (opt_index, arg, value)) 604169703Skan result = 0; 605169703Skan 606132718Skan done: 607132718Skan if (dup) 608132718Skan free (dup); 609132718Skan return result; 610132718Skan} 611132718Skan 612169703Skan/* Handle FILENAME from the command line. */ 613169703Skanstatic void 614169703Skanadd_input_filename (const char *filename) 615169703Skan{ 616169703Skan num_in_fnames++; 617169703Skan in_fnames = xrealloc (in_fnames, num_in_fnames * sizeof (in_fnames[0])); 618169703Skan in_fnames[num_in_fnames - 1] = filename; 619169703Skan} 620169703Skan 621259405Spfg/* Add functions or file names to a vector of names to exclude from 622259405Spfg instrumentation. */ 623259405Spfg 624259405Spfgstatic void 625259405Spfgadd_instrument_functions_exclude_list (VEC(char_p,heap) **pvec, 626259405Spfg const char* arg) 627259405Spfg{ 628259405Spfg char *tmp; 629259405Spfg char *r; 630259405Spfg char *w; 631259405Spfg char *token_start; 632259405Spfg 633259405Spfg /* We never free this string. */ 634259405Spfg tmp = xstrdup (arg); 635259405Spfg 636259405Spfg r = tmp; 637259405Spfg w = tmp; 638259405Spfg token_start = tmp; 639259405Spfg 640259405Spfg while (*r != '\0') 641259405Spfg { 642259405Spfg if (*r == ',') 643259405Spfg { 644259405Spfg *w++ = '\0'; 645259405Spfg ++r; 646259405Spfg VEC_safe_push (char_p, heap, *pvec, token_start); 647259405Spfg token_start = w; 648259405Spfg } 649259405Spfg if (*r == '\\' && r[1] == ',') 650259405Spfg { 651259405Spfg *w++ = ','; 652259405Spfg r += 2; 653259405Spfg } 654259405Spfg else 655259405Spfg *w++ = *r++; 656259405Spfg } 657259405Spfg if (*token_start != '\0') 658259405Spfg VEC_safe_push (char_p, heap, *pvec, token_start); 659259405Spfg} 660259405Spfg 661259405Spfg/* Return whether we should exclude FNDECL from instrumentation. */ 662259405Spfg 663259405Spfgbool 664259405Spfgflag_instrument_functions_exclude_p (tree fndecl) 665259405Spfg{ 666259405Spfg if (VEC_length (char_p, flag_instrument_functions_exclude_functions) > 0) 667259405Spfg { 668259405Spfg const char *name; 669259405Spfg int i; 670259405Spfg char *s; 671259405Spfg 672259405Spfg name = lang_hooks.decl_printable_name (fndecl, 0); 673259405Spfg for (i = 0; 674259405Spfg VEC_iterate (char_p, flag_instrument_functions_exclude_functions, 675259405Spfg i, s); 676259405Spfg ++i) 677259405Spfg { 678259405Spfg if (strstr (name, s) != NULL) 679259405Spfg return true; 680259405Spfg } 681259405Spfg } 682259405Spfg 683259405Spfg if (VEC_length (char_p, flag_instrument_functions_exclude_files) > 0) 684259405Spfg { 685259405Spfg const char *name; 686259405Spfg int i; 687259405Spfg char *s; 688259405Spfg 689259405Spfg name = DECL_SOURCE_FILE (fndecl); 690259405Spfg for (i = 0; 691259405Spfg VEC_iterate (char_p, flag_instrument_functions_exclude_files, i, s); 692259405Spfg ++i) 693259405Spfg { 694259405Spfg if (strstr (name, s) != NULL) 695259405Spfg return true; 696259405Spfg } 697259405Spfg } 698259405Spfg 699259405Spfg return false; 700259405Spfg} 701259405Spfg 702132718Skan/* Decode and handle the vector of command line options. LANG_MASK 703132718Skan contains has a single bit set representing the current 704132718Skan language. */ 705132718Skanstatic void 706132718Skanhandle_options (unsigned int argc, const char **argv, unsigned int lang_mask) 707132718Skan{ 708132718Skan unsigned int n, i; 709132718Skan 710132718Skan for (i = 1; i < argc; i += n) 711132718Skan { 712132718Skan const char *opt = argv[i]; 713132718Skan 714132718Skan /* Interpret "-" or a non-switch as a file name. */ 715132718Skan if (opt[0] != '-' || opt[1] == '\0') 716132718Skan { 717132718Skan if (main_input_filename == NULL) 718259268Spfg { 719132718Skan main_input_filename = opt; 720259268Spfg main_input_baselength 721259268Spfg = base_of_path (main_input_filename, &main_input_basename); 722259268Spfg } 723132718Skan add_input_filename (opt); 724132718Skan n = 1; 725132718Skan continue; 726132718Skan } 727132718Skan 728132718Skan n = handle_option (argv + i, lang_mask); 729132718Skan 730132718Skan if (!n) 731132718Skan { 732132718Skan n = 1; 733132718Skan error ("unrecognized command line option \"%s\"", opt); 734132718Skan } 735132718Skan } 736132718Skan} 737132718Skan 738132718Skan/* Parse command line options and set default flag values. Do minimal 739132718Skan options processing. */ 740132718Skanvoid 741132718Skandecode_options (unsigned int argc, const char **argv) 742132718Skan{ 743132718Skan unsigned int i, lang_mask; 744132718Skan 745132718Skan /* Perform language-specific options initialization. */ 746169703Skan lang_mask = lang_hooks.init_options (argc, argv); 747132718Skan 748132718Skan lang_hooks.initialize_diagnostics (global_dc); 749132718Skan 750132718Skan /* Scan to see what optimization level has been specified. That will 751132718Skan determine the default value of many flags. */ 752132718Skan for (i = 1; i < argc; i++) 753132718Skan { 754132718Skan if (!strcmp (argv[i], "-O")) 755132718Skan { 756132718Skan optimize = 1; 757132718Skan optimize_size = 0; 758132718Skan } 759132718Skan else if (argv[i][0] == '-' && argv[i][1] == 'O') 760132718Skan { 761132718Skan /* Handle -Os, -O2, -O3, -O69, ... */ 762132718Skan const char *p = &argv[i][2]; 763132718Skan 764132718Skan if ((p[0] == 's') && (p[1] == 0)) 765132718Skan { 766132718Skan optimize_size = 1; 767132718Skan 768132718Skan /* Optimizing for size forces optimize to be 2. */ 769132718Skan optimize = 2; 770132718Skan } 771132718Skan else 772132718Skan { 773132718Skan const int optimize_val = read_integral_parameter (p, p - 2, -1); 774132718Skan if (optimize_val != -1) 775132718Skan { 776132718Skan optimize = optimize_val; 777132718Skan optimize_size = 0; 778132718Skan } 779132718Skan } 780132718Skan } 781132718Skan } 782132718Skan 783132718Skan if (!optimize) 784132718Skan { 785132718Skan flag_merge_constants = 0; 786132718Skan } 787132718Skan 788132718Skan if (optimize >= 1) 789132718Skan { 790132718Skan flag_defer_pop = 1; 791132718Skan#ifdef DELAY_SLOTS 792132718Skan flag_delayed_branch = 1; 793132718Skan#endif 794132718Skan#ifdef CAN_DEBUG_WITHOUT_FP 795132718Skan flag_omit_frame_pointer = 1; 796132718Skan#endif 797132718Skan flag_guess_branch_prob = 1; 798132718Skan flag_cprop_registers = 1; 799132718Skan flag_if_conversion = 1; 800132718Skan flag_if_conversion2 = 1; 801169703Skan flag_ipa_pure_const = 1; 802169703Skan flag_ipa_reference = 1; 803169703Skan flag_tree_ccp = 1; 804169703Skan flag_tree_dce = 1; 805169703Skan flag_tree_dom = 1; 806169703Skan flag_tree_dse = 1; 807169703Skan flag_tree_ter = 1; 808169703Skan flag_tree_live_range_split = 1; 809169703Skan flag_tree_sra = 1; 810169703Skan flag_tree_copyrename = 1; 811169703Skan flag_tree_fre = 1; 812169703Skan flag_tree_copy_prop = 1; 813169703Skan flag_tree_sink = 1; 814169703Skan flag_tree_salias = 1; 815169703Skan if (!no_unit_at_a_time_default) 816169703Skan flag_unit_at_a_time = 1; 817169703Skan 818169703Skan if (!optimize_size) 819169703Skan { 820169703Skan /* Loop header copying usually increases size of the code. This used 821169703Skan not to be true, since quite often it is possible to verify that 822169703Skan the condition is satisfied in the first iteration and therefore 823169703Skan to eliminate it. Jump threading handles these cases now. */ 824169703Skan flag_tree_ch = 1; 825169703Skan } 826132718Skan } 827132718Skan 828132718Skan if (optimize >= 2) 829132718Skan { 830169703Skan flag_thread_jumps = 1; 831132718Skan flag_crossjumping = 1; 832132718Skan flag_optimize_sibling_calls = 1; 833132718Skan flag_cse_follow_jumps = 1; 834132718Skan flag_cse_skip_blocks = 1; 835132718Skan flag_gcse = 1; 836132718Skan flag_expensive_optimizations = 1; 837169703Skan flag_ipa_type_escape = 1; 838132718Skan flag_rerun_cse_after_loop = 1; 839132718Skan flag_caller_saves = 1; 840132718Skan flag_peephole2 = 1; 841132718Skan#ifdef INSN_SCHEDULING 842132718Skan flag_schedule_insns = 1; 843132718Skan flag_schedule_insns_after_reload = 1; 844132718Skan#endif 845132718Skan flag_regmove = 1; 846132718Skan flag_strict_aliasing = 1; 847169703Skan flag_strict_overflow = 1; 848132718Skan flag_delete_null_pointer_checks = 1; 849132718Skan flag_reorder_blocks = 1; 850132718Skan flag_reorder_functions = 1; 851169703Skan flag_tree_store_ccp = 1; 852169703Skan flag_tree_store_copy_prop = 1; 853172419Sobrien /* XXX: some issues with ports have been traced to -ftree-vrp. 854172419Sobrien So remove it from -O2 and above. Note that jdk1{5,6} are affected 855172419Sobrien and they build with w/-O3 - so we cannot just move it to -O3. */ 856252176Spfg /* flag_tree_vrp = 1; // See GCC tree-optimization/33099 */ 857169703Skan 858169703Skan if (!optimize_size) 859169703Skan { 860169703Skan /* PRE tends to generate bigger code. */ 861169703Skan flag_tree_pre = 1; 862169703Skan } 863132718Skan } 864132718Skan 865132718Skan if (optimize >= 3) 866132718Skan { 867132718Skan flag_inline_functions = 1; 868132718Skan flag_unswitch_loops = 1; 869169703Skan flag_gcse_after_reload = 1; 870132718Skan } 871132718Skan 872132735Skan if (optimize_size) 873132718Skan { 874132718Skan align_loops = 1; 875132718Skan align_jumps = 1; 876132718Skan align_labels = 1; 877132718Skan align_functions = 1; 878132718Skan 879132718Skan /* Don't reorder blocks when optimizing for size because extra 880132718Skan jump insns may be created; also barrier may create extra padding. 881132718Skan 882132718Skan More correctly we should have a block reordering mode that tried 883132718Skan to minimize the combined size of all the jumps. This would more 884132718Skan or less automatically remove extra jumps, but would also try to 885132718Skan use more short jumps instead of long jumps. */ 886132718Skan flag_reorder_blocks = 0; 887169703Skan flag_reorder_blocks_and_partition = 0; 888132718Skan } 889132718Skan 890169703Skan if (optimize_size) 891169703Skan { 892169703Skan /* Inlining of very small functions usually reduces total size. */ 893169703Skan set_param_value ("max-inline-insns-single", 5); 894169703Skan set_param_value ("max-inline-insns-auto", 5); 895169703Skan flag_inline_functions = 1; 896169703Skan 897169703Skan /* We want to crossjump as much as possible. */ 898169703Skan set_param_value ("min-crossjump-insns", 1); 899169703Skan } 900169703Skan 901132718Skan /* Initialize whether `char' is signed. */ 902132718Skan flag_signed_char = DEFAULT_SIGNED_CHAR; 903169703Skan /* Set this to a special "uninitialized" value. The actual default is set 904169703Skan after target options have been processed. */ 905169703Skan flag_short_enums = 2; 906132718Skan 907132718Skan /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can 908132718Skan modify it. */ 909169703Skan target_flags = targetm.default_target_flags; 910132718Skan 911169703Skan /* Some tagets have ABI-specified unwind tables. */ 912169703Skan flag_unwind_tables = targetm.unwind_tables_default; 913132718Skan 914132718Skan#ifdef OPTIMIZATION_OPTIONS 915132718Skan /* Allow default optimizations to be specified on a per-machine basis. */ 916132718Skan OPTIMIZATION_OPTIONS (optimize, optimize_size); 917132718Skan#endif 918132718Skan 919132718Skan handle_options (argc, argv, lang_mask); 920132718Skan 921132718Skan if (flag_pie) 922132718Skan flag_pic = flag_pie; 923132718Skan if (flag_pic && !flag_pie) 924132718Skan flag_shlib = 1; 925132718Skan 926132718Skan if (flag_no_inline == 2) 927132718Skan flag_no_inline = 0; 928132718Skan else 929132718Skan flag_really_no_inline = flag_no_inline; 930132718Skan 931132718Skan /* Set flag_no_inline before the post_options () hook. The C front 932132718Skan ends use it to determine tree inlining defaults. FIXME: such 933132718Skan code should be lang-independent when all front ends use tree 934132718Skan inlining, in which case it, and this condition, should be moved 935132718Skan to the top of process_options() instead. */ 936132718Skan if (optimize == 0) 937132718Skan { 938132718Skan /* Inlining does not work if not optimizing, 939132718Skan so force it not to be done. */ 940132718Skan flag_no_inline = 1; 941132718Skan warn_inline = 0; 942132718Skan 943132718Skan /* The c_decode_option function and decode_option hook set 944132718Skan this to `2' if -Wall is used, so we can avoid giving out 945132718Skan lots of errors for people who don't realize what -Wall does. */ 946132718Skan if (warn_uninitialized == 1) 947169703Skan warning (OPT_Wuninitialized, 948169703Skan "-Wuninitialized is not supported without -O"); 949132718Skan } 950132718Skan 951132718Skan if (flag_really_no_inline == 2) 952132718Skan flag_really_no_inline = flag_no_inline; 953169703Skan 954169703Skan /* The optimization to partition hot and cold basic blocks into separate 955169703Skan sections of the .o and executable files does not work (currently) 956169703Skan with exception handling. This is because there is no support for 957169703Skan generating unwind info. If flag_exceptions is turned on we need to 958169703Skan turn off the partitioning optimization. */ 959169703Skan 960169703Skan if (flag_exceptions && flag_reorder_blocks_and_partition) 961169703Skan { 962169703Skan inform 963169703Skan ("-freorder-blocks-and-partition does not work with exceptions"); 964169703Skan flag_reorder_blocks_and_partition = 0; 965169703Skan flag_reorder_blocks = 1; 966169703Skan } 967169703Skan 968169703Skan /* If user requested unwind info, then turn off the partitioning 969169703Skan optimization. */ 970169703Skan 971169703Skan if (flag_unwind_tables && ! targetm.unwind_tables_default 972169703Skan && flag_reorder_blocks_and_partition) 973169703Skan { 974169703Skan inform ("-freorder-blocks-and-partition does not support unwind info"); 975169703Skan flag_reorder_blocks_and_partition = 0; 976169703Skan flag_reorder_blocks = 1; 977169703Skan } 978169703Skan 979169703Skan /* If the target requested unwind info, then turn off the partitioning 980169703Skan optimization with a different message. Likewise, if the target does not 981169703Skan support named sections. */ 982169703Skan 983169703Skan if (flag_reorder_blocks_and_partition 984169703Skan && (!targetm.have_named_sections 985169703Skan || (flag_unwind_tables && targetm.unwind_tables_default))) 986169703Skan { 987169703Skan inform 988169703Skan ("-freorder-blocks-and-partition does not work on this architecture"); 989169703Skan flag_reorder_blocks_and_partition = 0; 990169703Skan flag_reorder_blocks = 1; 991169703Skan } 992132718Skan} 993132718Skan 994132718Skan/* Handle target- and language-independent options. Return zero to 995169703Skan generate an "unknown option" message. Only options that need 996169703Skan extra handling need to be listed here; if you simply want 997169703Skan VALUE assigned to a variable, it happens automatically. */ 998169703Skan 999132718Skanstatic int 1000169703Skancommon_handle_option (size_t scode, const char *arg, int value, 1001169703Skan unsigned int lang_mask) 1002132718Skan{ 1003132718Skan enum opt_code code = (enum opt_code) scode; 1004132718Skan 1005132718Skan switch (code) 1006132718Skan { 1007132718Skan case OPT__help: 1008132718Skan print_help (); 1009132718Skan exit_after_options = true; 1010132718Skan break; 1011132718Skan 1012132718Skan case OPT__param: 1013132718Skan handle_param (arg); 1014132718Skan break; 1015132718Skan 1016132718Skan case OPT__target_help: 1017169703Skan print_target_help (); 1018132718Skan exit_after_options = true; 1019132718Skan break; 1020132718Skan 1021132718Skan case OPT__version: 1022132718Skan print_version (stderr, ""); 1023132718Skan exit_after_options = true; 1024132718Skan break; 1025132718Skan 1026132718Skan case OPT_G: 1027132718Skan g_switch_value = value; 1028132718Skan g_switch_set = true; 1029132718Skan break; 1030132718Skan 1031132718Skan case OPT_O: 1032132718Skan case OPT_Os: 1033132718Skan /* Currently handled in a prescan. */ 1034132718Skan break; 1035132718Skan 1036132718Skan case OPT_W: 1037132718Skan /* For backward compatibility, -W is the same as -Wextra. */ 1038132718Skan set_Wextra (value); 1039132718Skan break; 1040132718Skan 1041169703Skan case OPT_Werror_: 1042169703Skan { 1043169703Skan char *new_option; 1044169703Skan int option_index; 1045169703Skan new_option = XNEWVEC (char, strlen (arg) + 2); 1046169703Skan new_option[0] = 'W'; 1047169703Skan strcpy (new_option+1, arg); 1048169703Skan option_index = find_opt (new_option, lang_mask); 1049169703Skan if (option_index == N_OPTS) 1050169703Skan { 1051169703Skan error ("-Werror=%s: No option -%s", arg, new_option); 1052169703Skan } 1053169703Skan else 1054169703Skan { 1055169703Skan int kind = value ? DK_ERROR : DK_WARNING; 1056169703Skan diagnostic_classify_diagnostic (global_dc, option_index, kind); 1057132718Skan 1058169703Skan /* -Werror=foo implies -Wfoo. */ 1059169703Skan if (cl_options[option_index].var_type == CLVC_BOOLEAN 1060169703Skan && cl_options[option_index].flag_var 1061169703Skan && kind == DK_ERROR) 1062169703Skan *(int *) cl_options[option_index].flag_var = 1; 1063169703Skan free (new_option); 1064169703Skan } 1065169703Skan } 1066132718Skan break; 1067132718Skan 1068132718Skan case OPT_Wextra: 1069132718Skan set_Wextra (value); 1070132718Skan break; 1071132718Skan 1072132718Skan case OPT_Wlarger_than_: 1073132718Skan larger_than_size = value; 1074132718Skan warn_larger_than = value != -1; 1075132718Skan break; 1076132718Skan 1077259405Spfg case OPT_Wframe_larger_than_: 1078259405Spfg frame_larger_than_size = value; 1079259405Spfg warn_frame_larger_than = value != -1; 1080259405Spfg break; 1081259405Spfg 1082132718Skan case OPT_Wstrict_aliasing: 1083259405Spfg set_warn_strict_aliasing (value); 1084259405Spfg break; 1085259405Spfg 1086169703Skan case OPT_Wstrict_aliasing_: 1087132718Skan warn_strict_aliasing = value; 1088132718Skan break; 1089132718Skan 1090169703Skan case OPT_Wstrict_overflow: 1091169703Skan warn_strict_overflow = (value 1092169703Skan ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL 1093169703Skan : 0); 1094132718Skan break; 1095132718Skan 1096169703Skan case OPT_Wstrict_overflow_: 1097169703Skan warn_strict_overflow = value; 1098132718Skan break; 1099132718Skan 1100132718Skan case OPT_Wunused: 1101132718Skan set_Wunused (value); 1102132718Skan break; 1103132718Skan 1104132718Skan case OPT_aux_info: 1105132718Skan case OPT_aux_info_: 1106132718Skan aux_info_file_name = arg; 1107132718Skan flag_gen_aux_info = 1; 1108132718Skan break; 1109132718Skan 1110132718Skan case OPT_auxbase: 1111132718Skan aux_base_name = arg; 1112132718Skan break; 1113132718Skan 1114132718Skan case OPT_auxbase_strip: 1115132718Skan { 1116132718Skan char *tmp = xstrdup (arg); 1117132718Skan strip_off_ending (tmp, strlen (tmp)); 1118132718Skan if (tmp[0]) 1119132718Skan aux_base_name = tmp; 1120132718Skan } 1121132718Skan break; 1122132718Skan 1123132718Skan case OPT_d: 1124132718Skan decode_d_option (arg); 1125132718Skan break; 1126132718Skan 1127132718Skan case OPT_dumpbase: 1128132718Skan dump_base_name = arg; 1129132718Skan break; 1130132718Skan 1131132718Skan case OPT_falign_functions_: 1132132718Skan align_functions = value; 1133132718Skan break; 1134132718Skan 1135132718Skan case OPT_falign_jumps_: 1136132718Skan align_jumps = value; 1137132718Skan break; 1138132718Skan 1139132718Skan case OPT_falign_labels_: 1140132718Skan align_labels = value; 1141132718Skan break; 1142132718Skan 1143132718Skan case OPT_falign_loops_: 1144132718Skan align_loops = value; 1145132718Skan break; 1146132718Skan 1147132718Skan case OPT_fbranch_probabilities: 1148132718Skan flag_branch_probabilities_set = true; 1149132718Skan break; 1150132718Skan 1151132718Skan case OPT_fcall_used_: 1152132718Skan fix_register (arg, 0, 1); 1153132718Skan break; 1154132718Skan 1155132718Skan case OPT_fcall_saved_: 1156132718Skan fix_register (arg, 0, 0); 1157132718Skan break; 1158132718Skan 1159132718Skan case OPT_fdiagnostics_show_location_: 1160132718Skan if (!strcmp (arg, "once")) 1161132718Skan diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE; 1162132718Skan else if (!strcmp (arg, "every-line")) 1163132718Skan diagnostic_prefixing_rule (global_dc) 1164132718Skan = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE; 1165132718Skan else 1166132718Skan return 0; 1167132718Skan break; 1168132718Skan 1169169703Skan case OPT_fdiagnostics_show_option: 1170169703Skan global_dc->show_option_requested = true; 1171132718Skan break; 1172132718Skan 1173169703Skan case OPT_fdump_: 1174169703Skan if (!dump_switch_p (arg)) 1175169703Skan return 0; 1176132718Skan break; 1177132718Skan 1178132718Skan case OPT_ffast_math: 1179132718Skan set_fast_math_flags (value); 1180132718Skan break; 1181132718Skan 1182132718Skan case OPT_ffixed_: 1183132718Skan fix_register (arg, 1, 1); 1184132718Skan break; 1185132718Skan 1186132718Skan case OPT_finline_limit_: 1187132718Skan case OPT_finline_limit_eq: 1188132718Skan set_param_value ("max-inline-insns-single", value / 2); 1189132718Skan set_param_value ("max-inline-insns-auto", value / 2); 1190132718Skan break; 1191132718Skan 1192259405Spfg case OPT_finstrument_functions_exclude_function_list_: 1193259405Spfg add_instrument_functions_exclude_list 1194259405Spfg (&flag_instrument_functions_exclude_functions, arg); 1195259405Spfg break; 1196259405Spfg 1197259405Spfg case OPT_finstrument_functions_exclude_file_list_: 1198259405Spfg add_instrument_functions_exclude_list 1199259405Spfg (&flag_instrument_functions_exclude_files, arg); 1200259405Spfg break; 1201259405Spfg 1202132718Skan case OPT_fmessage_length_: 1203132718Skan pp_set_line_maximum_length (global_dc->printer, value); 1204132718Skan break; 1205132718Skan 1206169703Skan case OPT_fpack_struct_: 1207169703Skan if (value <= 0 || (value & (value - 1)) || value > 16) 1208169703Skan error("structure alignment must be a small power of two, not %d", value); 1209169703Skan else 1210169703Skan { 1211169703Skan initial_max_fld_align = value; 1212169703Skan maximum_field_alignment = value * BITS_PER_UNIT; 1213169703Skan } 1214132718Skan break; 1215132718Skan 1216132718Skan case OPT_fpeel_loops: 1217132718Skan flag_peel_loops_set = true; 1218132718Skan break; 1219132718Skan 1220132718Skan case OPT_fprofile_arcs: 1221132718Skan profile_arc_flag_set = true; 1222132718Skan break; 1223132718Skan 1224132718Skan case OPT_fprofile_use: 1225132718Skan if (!flag_branch_probabilities_set) 1226132718Skan flag_branch_probabilities = value; 1227132718Skan if (!flag_profile_values_set) 1228132718Skan flag_profile_values = value; 1229132718Skan if (!flag_unroll_loops_set) 1230132718Skan flag_unroll_loops = value; 1231132718Skan if (!flag_peel_loops_set) 1232132718Skan flag_peel_loops = value; 1233132718Skan if (!flag_tracer_set) 1234132718Skan flag_tracer = value; 1235132718Skan if (!flag_value_profile_transformations_set) 1236132718Skan flag_value_profile_transformations = value; 1237132718Skan break; 1238132718Skan 1239132718Skan case OPT_fprofile_generate: 1240132718Skan if (!profile_arc_flag_set) 1241132718Skan profile_arc_flag = value; 1242132718Skan if (!flag_profile_values_set) 1243132718Skan flag_profile_values = value; 1244132718Skan if (!flag_value_profile_transformations_set) 1245132718Skan flag_value_profile_transformations = value; 1246132718Skan break; 1247132718Skan 1248132718Skan case OPT_fprofile_values: 1249132718Skan flag_profile_values_set = true; 1250132718Skan break; 1251132718Skan 1252169703Skan case OPT_fvisibility_: 1253169703Skan { 1254169703Skan if (!strcmp(arg, "default")) 1255169703Skan default_visibility = VISIBILITY_DEFAULT; 1256169703Skan else if (!strcmp(arg, "internal")) 1257169703Skan default_visibility = VISIBILITY_INTERNAL; 1258169703Skan else if (!strcmp(arg, "hidden")) 1259169703Skan default_visibility = VISIBILITY_HIDDEN; 1260169703Skan else if (!strcmp(arg, "protected")) 1261169703Skan default_visibility = VISIBILITY_PROTECTED; 1262169703Skan else 1263169703Skan error ("unrecognized visibility value \"%s\"", arg); 1264169703Skan } 1265169703Skan break; 1266169703Skan 1267132718Skan case OPT_fvpt: 1268169703Skan flag_value_profile_transformations_set = true; 1269132718Skan break; 1270132718Skan 1271132718Skan case OPT_frandom_seed: 1272132718Skan /* The real switch is -fno-random-seed. */ 1273132718Skan if (value) 1274132718Skan return 0; 1275132718Skan flag_random_seed = NULL; 1276132718Skan break; 1277132718Skan 1278132718Skan case OPT_frandom_seed_: 1279132718Skan flag_random_seed = arg; 1280132718Skan break; 1281132718Skan 1282132718Skan case OPT_fsched_verbose_: 1283132718Skan#ifdef INSN_SCHEDULING 1284132718Skan fix_sched_param ("verbose", arg); 1285132718Skan break; 1286132718Skan#else 1287132718Skan return 0; 1288132718Skan#endif 1289132718Skan 1290132718Skan case OPT_fsched_stalled_insns_: 1291132718Skan flag_sched_stalled_insns = value; 1292132718Skan if (flag_sched_stalled_insns == 0) 1293132718Skan flag_sched_stalled_insns = -1; 1294132718Skan break; 1295132718Skan 1296132718Skan case OPT_fsched_stalled_insns_dep_: 1297132718Skan flag_sched_stalled_insns_dep = value; 1298132718Skan break; 1299132718Skan 1300132718Skan case OPT_fstack_limit: 1301132718Skan /* The real switch is -fno-stack-limit. */ 1302132718Skan if (value) 1303132718Skan return 0; 1304132718Skan stack_limit_rtx = NULL_RTX; 1305132718Skan break; 1306132718Skan 1307132718Skan case OPT_fstack_limit_register_: 1308132718Skan { 1309132718Skan int reg = decode_reg_name (arg); 1310132718Skan if (reg < 0) 1311132718Skan error ("unrecognized register name \"%s\"", arg); 1312132718Skan else 1313132718Skan stack_limit_rtx = gen_rtx_REG (Pmode, reg); 1314132718Skan } 1315132718Skan break; 1316132718Skan 1317132718Skan case OPT_fstack_limit_symbol_: 1318132718Skan stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (arg)); 1319132718Skan break; 1320132718Skan 1321169703Skan case OPT_ftree_vectorizer_verbose_: 1322169703Skan vect_set_verbosity_level (arg); 1323132718Skan break; 1324132718Skan 1325132718Skan case OPT_ftls_model_: 1326132718Skan if (!strcmp (arg, "global-dynamic")) 1327132718Skan flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC; 1328132718Skan else if (!strcmp (arg, "local-dynamic")) 1329132718Skan flag_tls_default = TLS_MODEL_LOCAL_DYNAMIC; 1330132718Skan else if (!strcmp (arg, "initial-exec")) 1331132718Skan flag_tls_default = TLS_MODEL_INITIAL_EXEC; 1332132718Skan else if (!strcmp (arg, "local-exec")) 1333132718Skan flag_tls_default = TLS_MODEL_LOCAL_EXEC; 1334132718Skan else 1335169703Skan warning (0, "unknown tls-model \"%s\"", arg); 1336132718Skan break; 1337132718Skan 1338132718Skan case OPT_ftracer: 1339132718Skan flag_tracer_set = true; 1340132718Skan break; 1341132718Skan 1342132718Skan case OPT_funroll_loops: 1343132718Skan flag_unroll_loops_set = true; 1344132718Skan break; 1345132718Skan 1346132718Skan case OPT_g: 1347132718Skan set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, arg); 1348132718Skan break; 1349132718Skan 1350132718Skan case OPT_gcoff: 1351132718Skan set_debug_level (SDB_DEBUG, false, arg); 1352132718Skan break; 1353132718Skan 1354132718Skan case OPT_gdwarf_2: 1355132718Skan set_debug_level (DWARF2_DEBUG, false, arg); 1356132718Skan break; 1357132718Skan 1358132718Skan case OPT_ggdb: 1359132718Skan set_debug_level (NO_DEBUG, 2, arg); 1360132718Skan break; 1361132718Skan 1362132718Skan case OPT_gstabs: 1363132718Skan case OPT_gstabs_: 1364132718Skan set_debug_level (DBX_DEBUG, code == OPT_gstabs_, arg); 1365132718Skan break; 1366132718Skan 1367132718Skan case OPT_gvms: 1368132718Skan set_debug_level (VMS_DEBUG, false, arg); 1369132718Skan break; 1370132718Skan 1371132718Skan case OPT_gxcoff: 1372132718Skan case OPT_gxcoff_: 1373132718Skan set_debug_level (XCOFF_DEBUG, code == OPT_gxcoff_, arg); 1374132718Skan break; 1375132718Skan 1376132718Skan case OPT_o: 1377132718Skan asm_file_name = arg; 1378132718Skan break; 1379132718Skan 1380132718Skan case OPT_pedantic_errors: 1381132718Skan flag_pedantic_errors = pedantic = 1; 1382132718Skan break; 1383132718Skan 1384169703Skan case OPT_fforce_mem: 1385169703Skan warning (0, "-f[no-]force-mem is nop and option will be removed in 4.3"); 1386132718Skan break; 1387132718Skan 1388169703Skan case OPT_floop_optimize: 1389169703Skan case OPT_frerun_loop_opt: 1390169703Skan case OPT_fstrength_reduce: 1391169703Skan /* These are no-ops, preserved for backward compatibility. */ 1392132718Skan break; 1393132718Skan 1394169703Skan default: 1395169703Skan /* If the flag was handled in a standard way, assume the lack of 1396169703Skan processing here is intentional. */ 1397169703Skan gcc_assert (cl_options[scode].flag_var); 1398169703Skan break; 1399132718Skan } 1400132718Skan 1401132718Skan return 1; 1402132718Skan} 1403132718Skan 1404132718Skan/* Handle --param NAME=VALUE. */ 1405132718Skanstatic void 1406132718Skanhandle_param (const char *carg) 1407132718Skan{ 1408132718Skan char *equal, *arg; 1409132718Skan int value; 1410132718Skan 1411132718Skan arg = xstrdup (carg); 1412132718Skan equal = strchr (arg, '='); 1413132718Skan if (!equal) 1414132718Skan error ("%s: --param arguments should be of the form NAME=VALUE", arg); 1415132718Skan else 1416132718Skan { 1417132718Skan value = integral_argument (equal + 1); 1418132718Skan if (value == -1) 1419169703Skan error ("invalid --param value %qs", equal + 1); 1420132718Skan else 1421132718Skan { 1422132718Skan *equal = '\0'; 1423132718Skan set_param_value (arg, value); 1424132718Skan } 1425132718Skan } 1426132718Skan 1427132718Skan free (arg); 1428132718Skan} 1429132718Skan 1430132718Skan/* Handle -W and -Wextra. */ 1431132718Skanstatic void 1432132718Skanset_Wextra (int setting) 1433132718Skan{ 1434132718Skan extra_warnings = setting; 1435132718Skan warn_unused_value = setting; 1436132718Skan warn_unused_parameter = (setting && maybe_warn_unused_parameter); 1437132718Skan 1438132718Skan /* We save the value of warn_uninitialized, since if they put 1439132718Skan -Wuninitialized on the command line, we need to generate a 1440132718Skan warning about not using it without also specifying -O. */ 1441132718Skan if (setting == 0) 1442132718Skan warn_uninitialized = 0; 1443132718Skan else if (warn_uninitialized != 1) 1444132718Skan warn_uninitialized = 2; 1445132718Skan} 1446132718Skan 1447132718Skan/* Initialize unused warning flags. */ 1448132718Skanvoid 1449132718Skanset_Wunused (int setting) 1450132718Skan{ 1451132718Skan warn_unused_function = setting; 1452132718Skan warn_unused_label = setting; 1453132718Skan /* Unused function parameter warnings are reported when either 1454132718Skan ``-Wextra -Wunused'' or ``-Wunused-parameter'' is specified. 1455132718Skan Thus, if -Wextra has already been seen, set warn_unused_parameter; 1456132718Skan otherwise set maybe_warn_extra_parameter, which will be picked up 1457132718Skan by set_Wextra. */ 1458132718Skan maybe_warn_unused_parameter = setting; 1459132718Skan warn_unused_parameter = (setting && extra_warnings); 1460132718Skan warn_unused_variable = setting; 1461132718Skan warn_unused_value = setting; 1462132718Skan} 1463132718Skan 1464259405Spfg/* Used to set the level of strict aliasing warnings, 1465259405Spfg when no level is specified (i.e., when -Wstrict-aliasing, and not 1466259405Spfg -Wstrict-aliasing=level was given). 1467259405Spfg ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified, 1468259405Spfg and 0 otherwise. After calling this function, wstrict_aliasing will be 1469259405Spfg set to the default value of -Wstrict_aliasing=level, currently 3. */ 1470259405Spfgvoid 1471259405Spfgset_warn_strict_aliasing (int onoff) 1472259405Spfg{ 1473259405Spfg gcc_assert (onoff == 0 || onoff == 1); 1474259405Spfg if (onoff != 0) 1475259405Spfg warn_strict_aliasing = 3; 1476259405Spfg} 1477259405Spfg 1478132718Skan/* The following routines are useful in setting all the flags that 1479132718Skan -ffast-math and -fno-fast-math imply. */ 1480132718Skanvoid 1481132718Skanset_fast_math_flags (int set) 1482132718Skan{ 1483132718Skan flag_trapping_math = !set; 1484132718Skan flag_unsafe_math_optimizations = set; 1485132718Skan flag_finite_math_only = set; 1486132718Skan flag_errno_math = !set; 1487132718Skan if (set) 1488132718Skan { 1489132718Skan flag_signaling_nans = 0; 1490132718Skan flag_rounding_math = 0; 1491169703Skan flag_cx_limited_range = 1; 1492132718Skan } 1493132718Skan} 1494132718Skan 1495132718Skan/* Return true iff flags are set as if -ffast-math. */ 1496132718Skanbool 1497132718Skanfast_math_flags_set_p (void) 1498132718Skan{ 1499132718Skan return (!flag_trapping_math 1500132718Skan && flag_unsafe_math_optimizations 1501132718Skan && flag_finite_math_only 1502132718Skan && !flag_errno_math); 1503132718Skan} 1504132718Skan 1505132718Skan/* Handle a debug output -g switch. EXTENDED is true or false to support 1506132718Skan extended output (2 is special and means "-ggdb" was given). */ 1507132718Skanstatic void 1508132718Skanset_debug_level (enum debug_info_type type, int extended, const char *arg) 1509132718Skan{ 1510132718Skan static bool type_explicit; 1511132718Skan 1512132718Skan use_gnu_debug_info_extensions = extended; 1513132718Skan 1514132718Skan if (type == NO_DEBUG) 1515132718Skan { 1516132718Skan if (write_symbols == NO_DEBUG) 1517132718Skan { 1518132718Skan write_symbols = PREFERRED_DEBUGGING_TYPE; 1519132718Skan 1520132718Skan if (extended == 2) 1521132718Skan { 1522132718Skan#ifdef DWARF2_DEBUGGING_INFO 1523132718Skan write_symbols = DWARF2_DEBUG; 1524132718Skan#elif defined DBX_DEBUGGING_INFO 1525132718Skan write_symbols = DBX_DEBUG; 1526132718Skan#endif 1527132718Skan } 1528132718Skan 1529132718Skan if (write_symbols == NO_DEBUG) 1530169703Skan warning (0, "target system does not support debug output"); 1531132718Skan } 1532132718Skan } 1533132718Skan else 1534132718Skan { 1535132718Skan /* Does it conflict with an already selected type? */ 1536132718Skan if (type_explicit && write_symbols != NO_DEBUG && type != write_symbols) 1537132718Skan error ("debug format \"%s\" conflicts with prior selection", 1538132718Skan debug_type_names[type]); 1539132718Skan write_symbols = type; 1540132718Skan type_explicit = true; 1541132718Skan } 1542132718Skan 1543132718Skan /* A debug flag without a level defaults to level 2. */ 1544132718Skan if (*arg == '\0') 1545132718Skan { 1546132718Skan if (!debug_info_level) 1547132718Skan debug_info_level = 2; 1548132718Skan } 1549132718Skan else 1550132718Skan { 1551132718Skan debug_info_level = integral_argument (arg); 1552132718Skan if (debug_info_level == (unsigned int) -1) 1553132718Skan error ("unrecognised debug output level \"%s\"", arg); 1554132718Skan else if (debug_info_level > 3) 1555132718Skan error ("debug output level %s is too high", arg); 1556132718Skan } 1557132718Skan} 1558132718Skan 1559169703Skan/* Display help for target options. */ 1560169703Skanstatic void 1561169703Skanprint_target_help (void) 1562169703Skan{ 1563169703Skan unsigned int i; 1564169703Skan static bool displayed = false; 1565169703Skan 1566169703Skan /* Avoid double printing for --help --target-help. */ 1567169703Skan if (displayed) 1568169703Skan return; 1569169703Skan 1570169703Skan displayed = true; 1571169703Skan for (i = 0; i < cl_options_count; i++) 1572169703Skan if ((cl_options[i].flags & (CL_TARGET | CL_UNDOCUMENTED)) == CL_TARGET) 1573169703Skan { 1574169703Skan printf (_("\nTarget specific options:\n")); 1575169703Skan print_filtered_help (CL_TARGET); 1576169703Skan break; 1577169703Skan } 1578169703Skan} 1579169703Skan 1580132718Skan/* Output --help text. */ 1581132718Skanstatic void 1582132718Skanprint_help (void) 1583132718Skan{ 1584132718Skan size_t i; 1585132718Skan const char *p; 1586132718Skan 1587132718Skan GET_ENVIRONMENT (p, "COLUMNS"); 1588132718Skan if (p) 1589132718Skan { 1590132718Skan int value = atoi (p); 1591132718Skan if (value > 0) 1592132718Skan columns = value; 1593132718Skan } 1594132718Skan 1595132718Skan puts (_("The following options are language-independent:\n")); 1596132718Skan 1597132718Skan print_filtered_help (CL_COMMON); 1598132718Skan print_param_help (); 1599132718Skan 1600132718Skan for (i = 0; lang_names[i]; i++) 1601132718Skan { 1602132718Skan printf (_("The %s front end recognizes the following options:\n\n"), 1603132718Skan lang_names[i]); 1604132718Skan print_filtered_help (1U << i); 1605132718Skan } 1606169703Skan print_target_help (); 1607132718Skan} 1608132718Skan 1609132718Skan/* Print the help for --param. */ 1610132718Skanstatic void 1611132718Skanprint_param_help (void) 1612132718Skan{ 1613132718Skan size_t i; 1614132718Skan 1615132718Skan puts (_("The --param option recognizes the following as parameters:\n")); 1616132718Skan 1617132718Skan for (i = 0; i < LAST_PARAM; i++) 1618132718Skan { 1619132718Skan const char *help = compiler_params[i].help; 1620132718Skan const char *param = compiler_params[i].option; 1621132718Skan 1622132718Skan if (help == NULL || *help == '\0') 1623132718Skan help = undocumented_msg; 1624132718Skan 1625132718Skan /* Get the translation. */ 1626132718Skan help = _(help); 1627132718Skan 1628132718Skan wrap_help (help, param, strlen (param)); 1629132718Skan } 1630132718Skan 1631132718Skan putchar ('\n'); 1632132718Skan} 1633132718Skan 1634132718Skan/* Print help for a specific front-end, etc. */ 1635132718Skanstatic void 1636132718Skanprint_filtered_help (unsigned int flag) 1637132718Skan{ 1638132718Skan unsigned int i, len, filter, indent = 0; 1639132718Skan bool duplicates = false; 1640132718Skan const char *help, *opt, *tab; 1641132718Skan static char *printed; 1642132718Skan 1643169703Skan if (flag == CL_COMMON || flag == CL_TARGET) 1644132718Skan { 1645132718Skan filter = flag; 1646132718Skan if (!printed) 1647132718Skan printed = xmalloc (cl_options_count); 1648132718Skan memset (printed, 0, cl_options_count); 1649132718Skan } 1650132718Skan else 1651132718Skan { 1652132718Skan /* Don't print COMMON options twice. */ 1653132718Skan filter = flag | CL_COMMON; 1654132718Skan 1655132718Skan for (i = 0; i < cl_options_count; i++) 1656132718Skan { 1657132718Skan if ((cl_options[i].flags & filter) != flag) 1658132718Skan continue; 1659132718Skan 1660132718Skan /* Skip help for internal switches. */ 1661132718Skan if (cl_options[i].flags & CL_UNDOCUMENTED) 1662132718Skan continue; 1663132718Skan 1664132718Skan /* Skip switches that have already been printed, mark them to be 1665132718Skan listed later. */ 1666132718Skan if (printed[i]) 1667132718Skan { 1668132718Skan duplicates = true; 1669132718Skan indent = print_switch (cl_options[i].opt_text, indent); 1670132718Skan } 1671132718Skan } 1672132718Skan 1673132718Skan if (duplicates) 1674132718Skan { 1675132718Skan putchar ('\n'); 1676132718Skan putchar ('\n'); 1677132718Skan } 1678132718Skan } 1679132718Skan 1680132718Skan for (i = 0; i < cl_options_count; i++) 1681132718Skan { 1682132718Skan if ((cl_options[i].flags & filter) != flag) 1683132718Skan continue; 1684132718Skan 1685132718Skan /* Skip help for internal switches. */ 1686132718Skan if (cl_options[i].flags & CL_UNDOCUMENTED) 1687132718Skan continue; 1688132718Skan 1689132718Skan /* Skip switches that have already been printed. */ 1690132718Skan if (printed[i]) 1691132718Skan continue; 1692132718Skan 1693132718Skan printed[i] = true; 1694132718Skan 1695132718Skan help = cl_options[i].help; 1696132718Skan if (!help) 1697132718Skan help = undocumented_msg; 1698132718Skan 1699132718Skan /* Get the translation. */ 1700132718Skan help = _(help); 1701132718Skan 1702132718Skan tab = strchr (help, '\t'); 1703132718Skan if (tab) 1704132718Skan { 1705132718Skan len = tab - help; 1706132718Skan opt = help; 1707132718Skan help = tab + 1; 1708132718Skan } 1709132718Skan else 1710132718Skan { 1711132718Skan opt = cl_options[i].opt_text; 1712132718Skan len = strlen (opt); 1713132718Skan } 1714132718Skan 1715132718Skan wrap_help (help, opt, len); 1716132718Skan } 1717132718Skan 1718132718Skan putchar ('\n'); 1719132718Skan} 1720132718Skan 1721132718Skan/* Output ITEM, of length ITEM_WIDTH, in the left column, followed by 1722132718Skan word-wrapped HELP in a second column. */ 1723132718Skanstatic unsigned int 1724132718Skanprint_switch (const char *text, unsigned int indent) 1725132718Skan{ 1726132718Skan unsigned int len = strlen (text) + 1; /* trailing comma */ 1727132718Skan 1728132718Skan if (indent) 1729132718Skan { 1730132718Skan putchar (','); 1731132718Skan if (indent + len > columns) 1732132718Skan { 1733132718Skan putchar ('\n'); 1734132718Skan putchar (' '); 1735132718Skan indent = 1; 1736132718Skan } 1737132718Skan } 1738132718Skan else 1739132718Skan putchar (' '); 1740132718Skan 1741132718Skan putchar (' '); 1742132718Skan fputs (text, stdout); 1743132718Skan 1744132718Skan return indent + len + 1; 1745132718Skan} 1746132718Skan 1747132718Skan/* Output ITEM, of length ITEM_WIDTH, in the left column, followed by 1748132718Skan word-wrapped HELP in a second column. */ 1749132718Skanstatic void 1750132718Skanwrap_help (const char *help, const char *item, unsigned int item_width) 1751132718Skan{ 1752132718Skan unsigned int col_width = 27; 1753132718Skan unsigned int remaining, room, len; 1754132718Skan 1755132718Skan remaining = strlen (help); 1756132718Skan 1757132718Skan do 1758132718Skan { 1759132718Skan room = columns - 3 - MAX (col_width, item_width); 1760132718Skan if (room > columns) 1761132718Skan room = 0; 1762132718Skan len = remaining; 1763132718Skan 1764132718Skan if (room < len) 1765132718Skan { 1766132718Skan unsigned int i; 1767132718Skan 1768132718Skan for (i = 0; help[i]; i++) 1769132718Skan { 1770132718Skan if (i >= room && len != remaining) 1771132718Skan break; 1772132718Skan if (help[i] == ' ') 1773132718Skan len = i; 1774132718Skan else if ((help[i] == '-' || help[i] == '/') 1775132718Skan && help[i + 1] != ' ' 1776132718Skan && i > 0 && ISALPHA (help[i - 1])) 1777132718Skan len = i + 1; 1778132718Skan } 1779132718Skan } 1780132718Skan 1781132718Skan printf( " %-*.*s %.*s\n", col_width, item_width, item, len, help); 1782132718Skan item_width = 0; 1783132718Skan while (help[len] == ' ') 1784132718Skan len++; 1785132718Skan help += len; 1786132718Skan remaining -= len; 1787132718Skan } 1788132718Skan while (remaining); 1789132718Skan} 1790169703Skan 1791169703Skan/* Return 1 if OPTION is enabled, 0 if it is disabled, or -1 if it isn't 1792169703Skan a simple on-off switch. */ 1793169703Skan 1794169703Skanint 1795169703Skanoption_enabled (int opt_idx) 1796169703Skan{ 1797169703Skan const struct cl_option *option = &(cl_options[opt_idx]); 1798169703Skan if (option->flag_var) 1799169703Skan switch (option->var_type) 1800169703Skan { 1801169703Skan case CLVC_BOOLEAN: 1802169703Skan return *(int *) option->flag_var != 0; 1803169703Skan 1804169703Skan case CLVC_EQUAL: 1805169703Skan return *(int *) option->flag_var == option->var_value; 1806169703Skan 1807169703Skan case CLVC_BIT_CLEAR: 1808169703Skan return (*(int *) option->flag_var & option->var_value) == 0; 1809169703Skan 1810169703Skan case CLVC_BIT_SET: 1811169703Skan return (*(int *) option->flag_var & option->var_value) != 0; 1812169703Skan 1813169703Skan case CLVC_STRING: 1814169703Skan break; 1815169703Skan } 1816169703Skan return -1; 1817169703Skan} 1818169703Skan 1819169703Skan/* Fill STATE with the current state of option OPTION. Return true if 1820169703Skan there is some state to store. */ 1821169703Skan 1822169703Skanbool 1823169703Skanget_option_state (int option, struct cl_option_state *state) 1824169703Skan{ 1825169703Skan if (cl_options[option].flag_var == 0) 1826169703Skan return false; 1827169703Skan 1828169703Skan switch (cl_options[option].var_type) 1829169703Skan { 1830169703Skan case CLVC_BOOLEAN: 1831169703Skan case CLVC_EQUAL: 1832169703Skan state->data = cl_options[option].flag_var; 1833169703Skan state->size = sizeof (int); 1834169703Skan break; 1835169703Skan 1836169703Skan case CLVC_BIT_CLEAR: 1837169703Skan case CLVC_BIT_SET: 1838169703Skan state->ch = option_enabled (option); 1839169703Skan state->data = &state->ch; 1840169703Skan state->size = 1; 1841169703Skan break; 1842169703Skan 1843169703Skan case CLVC_STRING: 1844169703Skan state->data = *(const char **) cl_options[option].flag_var; 1845169703Skan if (state->data == 0) 1846169703Skan state->data = ""; 1847169703Skan state->size = strlen (state->data) + 1; 1848169703Skan break; 1849169703Skan } 1850169703Skan return true; 1851169703Skan} 1852