/* Command line option handling. Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc. Contributed by Neil Booth. This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING. If not, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "config.h" #include "system.h" #include "intl.h" #include "coretypes.h" #include "tm.h" #include "tree.h" #include "rtl.h" #include "ggc.h" #include "output.h" #include "langhooks.h" #include "opts.h" #include "options.h" #include "flags.h" #include "toplev.h" #include "params.h" #include "diagnostic.h" #include "tm_p.h" /* For OPTIMIZATION_OPTIONS. */ #include "insn-attr.h" /* For INSN_SCHEDULING. */ #include "target.h" /* Value of the -G xx switch, and whether it was passed or not. */ unsigned HOST_WIDE_INT g_switch_value; bool g_switch_set; /* True if we should exit after parsing options. */ bool exit_after_options; /* If -version. */ bool version_flag; /* Print various extra warnings. -W/-Wextra. */ bool extra_warnings; /* Don't print warning messages. -w. */ bool inhibit_warnings; /* Treat warnings as errors. -Werror. */ bool warnings_are_errors; /* Warn if a function returns an aggregate, since there are often incompatible calling conventions for doing this. */ bool warn_aggregate_return; /* Nonzero means warn about pointer casts that increase the required alignment of the target type (and might therefore lead to a crash due to a misaligned access). */ bool warn_cast_align; /* Nonzero means warn about uses of __attribute__((deprecated)) declarations. */ bool warn_deprecated_decl = true; /* Warn when an optimization pass is disabled. */ bool warn_disabled_optimization; /* Nonzero means warn if inline function is too large. */ bool warn_inline; /* True to warn about any objects definitions whose size is larger than N bytes. Also want about function definitions whose returned values are larger than N bytes, where N is `larger_than_size'. */ bool warn_larger_than; HOST_WIDE_INT larger_than_size; /* Warn about functions which might be candidates for attribute noreturn. */ bool warn_missing_noreturn; /* True to warn about code which is never reached. */ bool warn_notreached; /* Warn if packed attribute on struct is unnecessary and inefficient. */ bool warn_packed; /* Warn when gcc pads a structure to an alignment boundary. */ bool warn_padded; /* True means warn about all declarations which shadow others. */ bool warn_shadow; /* Nonzero means warn about constructs which might not be strict-aliasing safe. */ bool warn_strict_aliasing; /* True to warn if a switch on an enum, that does not have a default case, fails to have a case for every enum value. */ bool warn_switch; /* Warn if a switch does not have a default case. */ bool warn_switch_default; /* Warn if a switch on an enum fails to have a case for every enum value (regardless of the presence or otherwise of a default case). */ bool warn_switch_enum; /* Don't suppress warnings from system headers. -Wsystem-headers. */ bool warn_system_headers; /* True to warn about variables used before they are initialized. */ int warn_uninitialized; /* True to warn about unused variables, functions et.al. */ bool warn_unused_function; bool warn_unused_label; bool warn_unused_parameter; bool warn_unused_variable; bool warn_unused_value; /* Hack for cooperation between set_Wunused and set_Wextra. */ static bool maybe_warn_unused_parameter; /* Type(s) of debugging information we are producing (if any). See flags.h for the definitions of the different possible types of debugging information. */ enum debug_info_type write_symbols = NO_DEBUG; /* APPLE LOCAL begin Symbol Separation */ /* Original value of write_symbols. */ enum debug_info_type orig_write_symbols = NO_DEBUG; /* Nonzero means, try to look for separate symbol repositories. */ int flag_grepository = 0; /* APPLE LOCAL end Symbol Separation */ /* Level of debugging information we are producing. See flags.h for the definitions of the different possible levels. */ enum debug_info_level debug_info_level = DINFO_LEVEL_NONE; /* Nonzero means use GNU-only extensions in the generated symbolic debugging information. Currently, this only has an effect when write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */ bool use_gnu_debug_info_extensions; /* Columns of --help display. */ static unsigned int columns = 80; /* What to print when a switch has no documentation. */ static const char undocumented_msg[] = N_("This switch lacks documentation"); /* Used for bookkeeping on whether user set these flags so -fprofile-use/-fprofile-generate does not use them. */ static bool profile_arc_flag_set, flag_profile_values_set; static bool flag_unroll_loops_set, flag_tracer_set; static bool flag_value_profile_transformations_set; static bool flag_peel_loops_set, flag_branch_probabilities_set; /* Input file names. */ const char **in_fnames; unsigned num_in_fnames; static size_t find_opt (const char *, int); static int common_handle_option (size_t scode, const char *arg, int value); static void handle_param (const char *); static void set_Wextra (int); static unsigned int handle_option (const char **argv, unsigned int lang_mask); static char *write_langs (unsigned int lang_mask); static void complain_wrong_lang (const char *, const struct cl_option *, unsigned int lang_mask); static void handle_options (unsigned int, const char **, unsigned int); static void wrap_help (const char *help, const char *item, unsigned int); static void print_help (void); static void print_param_help (void); static void print_filtered_help (unsigned int flag); static unsigned int print_switch (const char *text, unsigned int indent); static void set_debug_level (enum debug_info_type type, int extended, const char *arg); /* Perform a binary search to find which option the command-line INPUT matches. Returns its index in the option array, and N_OPTS (cl_options_count) on failure. This routine is quite subtle. A normal binary search is not good enough because some options can be suffixed with an argument, and multiple sub-matches can occur, e.g. input of "-pedantic" matching the initial substring of "-pedantic-errors". A more complicated example is -gstabs. It should match "-g" with an argument of "stabs". Suppose, however, that the number and list of switches are such that the binary search tests "-gen-decls" before having tested "-g". This doesn't match, and as "-gen-decls" is less than "-gstabs", it will become the lower bound of the binary search range, and "-g" will never be seen. To resolve this issue, opts.sh makes "-gen-decls" point, via the back_chain member, to "-g" so that failed searches that end between "-gen-decls" and the lexicographically subsequent switch know to go back and see if "-g" causes a match (which it does in this example). This search is done in such a way that the longest match for the front end in question wins. If there is no match for the current front end, the longest match for a different front end is returned (or N_OPTS if none) and the caller emits an error message. */ static size_t find_opt (const char *input, int lang_mask) { size_t mn, mx, md, opt_len; size_t match_wrong_lang; int comp; mn = 0; mx = cl_options_count; /* Find mn such this lexicographical inequality holds: cl_options[mn] <= input < cl_options[mn + 1]. */ while (mx - mn > 1) { md = (mn + mx) / 2; opt_len = cl_options[md].opt_len; comp = strncmp (input, cl_options[md].opt_text + 1, opt_len); if (comp < 0) mx = md; else mn = md; } /* This is the switch that is the best match but for a different front end, or cl_options_count if there is no match at all. */ match_wrong_lang = cl_options_count; /* Backtrace the chain of possible matches, returning the longest one, if any, that fits best. With current GCC switches, this loop executes at most twice. */ do { const struct cl_option *opt = &cl_options[mn]; /* Is this switch a prefix of the input? */ if (!strncmp (input, opt->opt_text + 1, opt->opt_len)) { /* If language is OK, and the match is exact or the switch takes a joined argument, return it. */ if ((opt->flags & lang_mask) && (input[opt->opt_len] == '\0' || (opt->flags & CL_JOINED))) return mn; /* If we haven't remembered a prior match, remember this one. Any prior match is necessarily better. */ if (match_wrong_lang == cl_options_count) match_wrong_lang = mn; } /* Try the next possibility. This is cl_options_count if there are no more. */ mn = opt->back_chain; } while (mn != cl_options_count); /* Return the best wrong match, or cl_options_count if none. */ return match_wrong_lang; } /* If ARG is a non-negative integer made up solely of digits, return its value, otherwise return -1. */ static int integral_argument (const char *arg) { const char *p = arg; while (*p && ISDIGIT (*p)) p++; if (*p == '\0') return atoi (arg); return -1; } /* Return a malloced slash-separated list of languages in MASK. */ static char * write_langs (unsigned int mask) { unsigned int n = 0, len = 0; const char *lang_name; char *result; for (n = 0; (lang_name = lang_names[n]) != 0; n++) if (mask & (1U << n)) len += strlen (lang_name) + 1; result = xmalloc (len); len = 0; for (n = 0; (lang_name = lang_names[n]) != 0; n++) if (mask & (1U << n)) { if (len) result[len++] = '/'; strcpy (result + len, lang_name); len += strlen (lang_name); } result[len] = 0; return result; } /* Complain that switch OPT_INDEX does not apply to this front end. */ static void complain_wrong_lang (const char *text, const struct cl_option *option, unsigned int lang_mask) { char *ok_langs, *bad_lang; ok_langs = write_langs (option->flags); bad_lang = write_langs (lang_mask); /* Eventually this should become a hard error IMO. */ warning ("command line option \"%s\" is valid for %s but not for %s", text, ok_langs, bad_lang); free (ok_langs); free (bad_lang); } /* Handle the switch beginning at ARGV for the language indicated by LANG_MASK. Returns the number of switches consumed. */ static unsigned int handle_option (const char **argv, unsigned int lang_mask) { size_t opt_index; const char *opt, *arg = 0; char *dup = 0; int value = 1; unsigned int result = 0; const struct cl_option *option; opt = argv[0]; /* Drop the "no-" from negative switches. */ if ((opt[1] == 'W' || opt[1] == 'f') && opt[2] == 'n' && opt[3] == 'o' && opt[4] == '-') { size_t len = strlen (opt) - 3; dup = xmalloc (len + 1); dup[0] = '-'; dup[1] = opt[1]; memcpy (dup + 2, opt + 5, len - 2 + 1); opt = dup; value = 0; } opt_index = find_opt (opt + 1, lang_mask | CL_COMMON); if (opt_index == cl_options_count) goto done; option = &cl_options[opt_index]; /* Reject negative form of switches that don't take negatives as unrecognized. */ if (!value && (option->flags & CL_REJECT_NEGATIVE)) goto done; /* We've recognized this switch. */ result = 1; /* Sort out any argument the switch takes. */ if (option->flags & CL_JOINED) { /* Have arg point to the original switch. This is because some code, such as disable_builtin_function, expects its argument to be persistent until the program exits. */ arg = argv[0] + cl_options[opt_index].opt_len + 1; if (!value) arg += strlen ("no-"); if (*arg == '\0' && !(option->flags & CL_MISSING_OK)) { if (option->flags & CL_SEPARATE) { arg = argv[1]; result = 2; } else /* Missing argument. */ arg = NULL; } } else if (option->flags & CL_SEPARATE) { arg = argv[1]; result = 2; } /* Now we've swallowed any potential argument, complain if this is a switch for a different front end. */ if (!(option->flags & (lang_mask | CL_COMMON))) { complain_wrong_lang (argv[0], option, lang_mask); goto done; } if (arg == NULL && (option->flags & (CL_JOINED | CL_SEPARATE))) { if (!(*lang_hooks.missing_argument) (opt, opt_index)) error ("missing argument to \"%s\"", opt); goto done; } /* If the switch takes an integer, convert it. */ if (arg && (option->flags & CL_UINTEGER)) { value = integral_argument (arg); if (value == -1) { error ("argument to \"%s\" should be a non-negative integer", option->opt_text); goto done; } } if (option->flags & lang_mask) if ((*lang_hooks.handle_option) (opt_index, arg, value) == 0) result = 0; if (result && (option->flags & CL_COMMON)) if (common_handle_option (opt_index, arg, value) == 0) result = 0; done: if (dup) free (dup); return result; } /* APPLE LOCAL radar 2866081: Env. variable override ilr */ static int add_env_options PARAMS ((unsigned int *, const char ***)); static int override_option PARAMS ((int, int, const char **)); /* Decode and handle the vector of command line options. LANG_MASK contains has a single bit set representing the current language. */ static void handle_options (unsigned int argc, const char **argv, unsigned int lang_mask) { unsigned int n, i; /* APPLE LOCAL radar 2866081: Env. variable override ilr */ do { for (i = 1; i < argc; i += n) { const char *opt = argv[i]; /* APPLE LOCAL begin radar 2866081: Env. variable override ilr */ if (!override_option (i, argc, argv)) { ++i; /* MERGE FIXME: we need to compute 'n'. */ n = 0; continue; } /* APPLE LOCAL end radar 2866081: Env. variable override ilr */ /* Interpret "-" or a non-switch as a file name. */ if (opt[0] != '-' || opt[1] == '\0') { if (main_input_filename == NULL) main_input_filename = opt; add_input_filename (opt); n = 1; continue; } n = handle_option (argv + i, lang_mask); if (!n) { n = 1; error ("unrecognized command line option \"%s\"", opt); } } /* APPLE LOCAL radar 2866081: Env. variable override ilr */ } while (add_env_options (&argc, &argv)); } /* APPLE LOCAL begin radar 2866081: Env. variable override ilr */ /*--------------------------------------------------------------------*/ /* The QA_OVERRIDE_GCC3_OPTIONS environment variable, if it exists, contains a list of options which override their counterparts on the compiler command line. This routine collects the options from that environment variable and creates an array (env_override_options) of n_overrides string pointers to then. Each command line option is passed through override_option() to check to see if it has an override in the env_override_options[] array. The general form for QA_OVERRIDE_GCC3_OPTIONS is as follows: -opt ... --opt arg s/pattern/replacement/ + -opt --opt arg ... In other words a set of override options or option replacements in the forms described below. The '+' means all options that the following options are to be added to the command line if they don't otherwise replace options. The syntax of the options in QA_OVERRIDE_GCC3_OPTIONS can be any of the following forms: -f[no-]option, -m[no-]option, -W[no-]option Override corresponding (ignoring the 'no-' prefix) options on the command line. --option arg Indicates that the -option has an argument and that the argument is to be replaced for that -option if it is present on the command line. + Adds the options that follow to the command line. Any of above option forms specified. They are added to the command line if not otherwise used to override an existing command line option. s/-option/replacement-option/, s/-option/replacement-option replacement-arg/, s/--option/replacement-option/, s/--option/replacement-option replacement-arg/ Replaces the -option and/or its argument. If there is nothing between the second two /'s (which can be any character) the option (and its arg for --option) are deleted. The --option cases indicate that the option and its argument are to be replaced either with an option that has no argument or another (possibly the same option) that itself has an argument. Note, there should be only one space between the replacement-option and replacement-arg. Normally whenever a command line option is affected by the options in QA_OVERRIDE_GCC3_OPTIONS are displayed confirming what was done (to stderr). For example, ### QA_OVERRIDE_GCC3_OPTIONS: -O2 -fno-inline ### QA_OVERRIDE_GCC3_OPTIONS: Optimization set to -O2 This may be suppressed by placing a '#' as the first character in the QA_OVERRIDE_GCC3_OPTIONS string. */ struct env_overrides { char *option; unsigned short flags; }; #define env_ovr_used 1 #define env_ovr_has_arg 2 #define env_ovr_add_arg 4 #define env_over_no_msg 8 static struct env_overrides *env_override_options; static int n_overrides = 0; static int env_override_options_max = 0; static int have_added_opts = 0; static int add_env_opts = 0; static int env_ovr_confirm = 1; static char *extract_override_options PARAMS ((void)); static void override_O_option PARAMS ((void)); static char * extract_override_options (void) { int has_arg = 0, scnt = 0, added_flag; char *override_O = NULL, s = 0; char *opts = getenv ("QA_OVERRIDE_GCC3_OPTIONS"); if (opts && *opts) { char c, *p, quote; static char *override_options_line; override_options_line = xstrdup (opts); if (override_options_line[0] == '#') { env_ovr_confirm = 0; p = override_options_line; } else { env_ovr_confirm = 1; p = override_options_line - 1; } if (env_ovr_confirm) fprintf (stderr, "### QA_OVERRIDE_GCC3_OPTIONS: %s\n", override_options_line); n_overrides = 0; while (1) { while (*++p == ' ') ; if ((c = *p) == '\0') break; if (p[0] == '-' && p[1] == 'O') override_O = p; else { if (p[0] == '+') { have_added_opts = env_ovr_add_arg; continue; } if (p[0] == 's') { s = p[1]; scnt = 0; added_flag = 0; } else { s = scnt = 0; added_flag = have_added_opts; } if (n_overrides >= env_override_options_max) { env_override_options_max += 6; env_override_options = (struct env_overrides *) xrealloc (env_override_options, sizeof (struct env_overrides) * env_override_options_max); if (n_overrides == 0) /* match argv[] counting */ ++n_overrides; } if (!has_arg && p[0] == '-' && p[1] == '-') { env_override_options[n_overrides].flags = env_ovr_has_arg | added_flag; env_override_options[n_overrides].option = p + 1; has_arg = 1; } else { env_override_options[n_overrides].flags = added_flag; env_override_options[n_overrides].option = p--; has_arg = 0; } ++n_overrides; } quote = 0; while (*++p && (*p != ' ' || quote || s)) if (*p == '"' || *p == '\'') quote = (quote && *p == quote) ? 0 : *p; else if (*p == '\\') ++p; else if (*p == s && ++scnt == 3) s = 0; if (!*p) break; *p = '\0'; } } if (has_arg) fatal_error ("QA_OVERRIDE_GCC3_OPTIONS invalid - last option should have an argument"); return override_O; } /* Called to handle -O overrides prior to main argument processing. A -O option can be overridded from the QA_OVERRIDE_GCC3_OPTIONS environment variable. Note that since this is prior to argument processing we call extract_override_options() from here to build the option overrides from QA_OVERRIDE_GCC3_OPTIONS. During main line option processing we then call override_option() to see if a specific option is overridden. */ static void override_O_option (void) { char *overide_opt = extract_override_options (); int optimize0 = optimize, optimize_size0 = optimize_size; if (!overide_opt) return; optimize = -1; if (!strcmp (overide_opt, "-O")) { optimize = 1; optimize_size = 0; } else if (overide_opt[0] == '-' && overide_opt[1] == 'O') { /* Handle -Os, -O2, -O3, -O69, ... */ char *p = overide_opt + 2; if ((p[0] == 's') && (p[1] == 0)) { optimize_size = 1; /* Optimizing for size forces optimize to be 2. */ optimize = 2; } else { const int optimize_val = read_integral_parameter (p, p - 2, -1); if (optimize_val != -1) { optimize = optimize_val; optimize_size = 0; } } } if (optimize < 0) fatal_error ("QA_OVERRIDE_GCC3_OPTIONS set with an invalid O option (%s).", overide_opt); if (env_ovr_confirm && (optimize != optimize0 || optimize_size != optimize_size0)) fprintf (stderr, "### QA_OVERRIDE_GCC3_OPTIONS: Optimization set to %s\n", overide_opt); } /* Check to see if the specified command line option is overridden by an option in the QA_OVERRIDE_GCC3_OPTIONS environment variable string. If is isn't, return the original command line option. If it is, return the override and display a message that the option was overridden. If add_env_opts is set then we only add options that are flagged to be added. This is initiated when add_env_options() is called after processing the command line options. */ static int override_option (int i, int argc, const char **argv) { int j, len, parg; char *p; const char *opt; char letter_opt1, letter_opt2, s = 0; char *repopt = NULL; char *reparg, *repend; static char rep_option[256], rep_arg[256]; if (n_overrides == 0) return 1; if (add_env_opts) { if ((env_override_options[i].flags & env_ovr_add_arg) == 0 || (env_override_options[i].flags & env_ovr_used) != 0 || env_override_options[i].option == NULL) return 0; argv[i] = env_override_options[i].option; if (env_override_options[i].flags & env_ovr_has_arg) { argv[i+1] = env_override_options[i+1].option; if (env_ovr_confirm && (env_override_options[i].flags & env_over_no_msg) == 0) fprintf (stderr, "### QA_OVERRIDE_GCC3_OPTIONS: Adding command line option '%s %s'\n", argv[i], argv[i+1]); } else if (env_ovr_confirm && (env_override_options[i].flags & env_over_no_msg) == 0) fprintf (stderr, "### QA_OVERRIDE_GCC3_OPTIONS: Adding command line option '%s'\n", argv[i]); return 1; } if (!argv[i]) return 0; opt = argv[i]; letter_opt1 = 0; if (opt[0] == '-') { if (opt[1] == 'f' || opt[1] == 'm' || opt[1] == 'W') { letter_opt1 = opt[1]; opt += 2; } if (opt[0] == 'n' && opt[1] == 'o' && opt[2] == '-') opt += 3; } for (j = 1; j < n_overrides; ++j) { p = env_override_options[j].option; letter_opt2 = 0; s = 0; parg = 0; if (p[0] == 's') { s = p[1]; p += 2; repopt = strchr (p, s); if (!repopt) return 1; *repopt++ = '\0'; if (p[0] == '-' && p[1] == '-') { parg = 1; ++p; } } if (p[0] == '-') { if (p[1] == 'f' || p[1] == 'm' || p[1] == 'W') { letter_opt2 = p[1]; p += 2; } if (p[0] == 'n' && p[1] == 'o' && p[2] == '-') p += 3; } if (strcmp (p, opt) == 0 && letter_opt1 == letter_opt2) { if (i < argc - 1 && (env_override_options[j].flags & env_ovr_has_arg)) argv[i + 1] = env_override_options[j + 1].option; if (s) { repend = strchr (repopt, s); reparg = NULL; if (repend) { reparg = strchr(repopt, ' '); if (reparg) { strncpy (rep_option, repopt, len = reparg - repopt); rep_option[len] = '\0'; ++reparg; strncpy (rep_arg, reparg, len = repend - reparg); rep_arg[len] = '\0'; } else { strncpy (rep_option, repopt, len = repend - repopt); rep_option[len] = rep_arg[0] = '\0'; } if (len) { if (parg) { if (reparg) /* s/--opt/rep_option rep_arg/ */ { if (strcmp (argv[i], rep_option) != 0 || strcmp (argv[i+1], rep_arg) == 0) { if (env_ovr_confirm && (env_override_options[j].flags & env_ovr_used) == 0) fprintf (stderr, "### QA_OVERRIDE_GCC3_OPTIONS: Replacing command line option '%s %s' with '%s %s'\n", argv[i], argv[i + 1], rep_option, rep_arg); argv[i] = rep_option; argv[i + 1] = rep_arg; } } else /* s/--opt/rep_option/ */ { if (env_ovr_confirm && (env_override_options[j].flags & env_ovr_used) == 0) fprintf (stderr, "### QA_OVERRIDE_GCC3_OPTIONS: Replacing command line option '%s %s' with '%s'\n", argv[i], argv[i + 1], rep_option); argv[i] = rep_option; argv[i+1] = NULL; } } else if (reparg) /* s/-opt/rep_option rep_arg/ */ { if (env_ovr_confirm && (env_override_options[j].flags & env_ovr_used) == 0) fprintf (stderr, "### QA_OVERRIDE_GCC3_OPTIONS: Replacing command line option '%s' with '%s %s'\n", argv[i], rep_option, rep_arg); if (n_overrides+1 >= env_override_options_max) { env_override_options_max += 6; env_override_options = (struct env_overrides *) xrealloc (env_override_options, sizeof (struct env_overrides) * env_override_options_max); if (n_overrides == 0) /* match argv[] counting */ ++n_overrides; } env_override_options[n_overrides ].option = rep_option; env_override_options[n_overrides++].flags = env_ovr_has_arg | env_ovr_add_arg | env_over_no_msg; env_override_options[n_overrides ].option = rep_arg; env_override_options[n_overrides++].flags = env_ovr_add_arg | env_over_no_msg; argv[i] = NULL; have_added_opts = 1; } else if (strcmp (argv[i], rep_option) != 0) /* s/-opt/rep_option/ */ { if (env_ovr_confirm && (env_override_options[j].flags & env_ovr_used) == 0) fprintf (stderr, "### QA_OVERRIDE_GCC3_OPTIONS: Replacing command line option '%s' with '%s'\n", argv[i], rep_option); argv[i] = rep_option; } } else { if (env_ovr_confirm && (env_override_options[j].flags & env_ovr_used) == 0) fprintf (stderr, "### QA_OVERRIDE_GCC3_OPTIONS: Deleting command line option '%s", argv[i]); if (parg) { if (env_ovr_confirm && (env_override_options[j].flags & env_ovr_used) == 0) fprintf (stderr, " %s", argv[i + 1]); argv[i + 1] = NULL; } if (env_ovr_confirm && (env_override_options[j].flags & env_ovr_used) == 0) fputs ("'\n", stderr); argv[i] = NULL; } } *(repopt-1) = s; env_override_options[j].flags |= env_ovr_used; return argv[i] != NULL; } else if (strcmp (argv[i], env_override_options[j].option) != 0) { if (env_ovr_confirm && (env_override_options[j].flags & env_ovr_used) == 0) fprintf (stderr, "### QA_OVERRIDE_GCC3_OPTIONS: Overriding command line option '%s' with '%s'\n", argv[i], env_override_options[j].option); argv[i] = env_override_options[j].option; env_override_options[j].flags |= env_ovr_used; return 1; } } else if (s) *(repopt-1) = s; } return 1; } /* Once all command line options are processed this routine is called to see if QA_OVERRIDE_GCC3_OPTIONS specified any options to be added. If there are we will return 1 to cause another option processing pass. But this time argc and argv will be set to use the env_override_options[] array and then only to select the added options. */ static int add_env_options (unsigned int *argc, const char ***argv) { static unsigned int save_argc; static const char **save_argv; if (have_added_opts) { if (!add_env_opts) { save_argv = *argv; save_argc = *argc; *argc = n_overrides; *argv = xmalloc (n_overrides * sizeof (char *)); add_env_opts = 1; return 1; } free (*argv); *argc = save_argc; *argv = save_argv; add_env_opts = 0; } return 0; } /* APPLE LOCAL end radar 2866081: Env. variable override ilr */ /* Handle FILENAME from the command line. */ void add_input_filename (const char *filename) { num_in_fnames++; in_fnames = xrealloc (in_fnames, num_in_fnames * sizeof (in_fnames[0])); in_fnames[num_in_fnames - 1] = filename; } /* Parse command line options and set default flag values. Do minimal options processing. */ void decode_options (unsigned int argc, const char **argv) { unsigned int i, lang_mask; /* Perform language-specific options initialization. */ lang_mask = (*lang_hooks.init_options) (argc, argv); lang_hooks.initialize_diagnostics (global_dc); /* Scan to see what optimization level has been specified. That will determine the default value of many flags. */ for (i = 1; i < argc; i++) { if (!strcmp (argv[i], "-O")) { optimize = 1; optimize_size = 0; } else if (argv[i][0] == '-' && argv[i][1] == 'O') { /* Handle -Os, -O2, -O3, -O69, ... */ const char *p = &argv[i][2]; if ((p[0] == 's') && (p[1] == 0)) { optimize_size = 1; /* Optimizing for size forces optimize to be 2. */ optimize = 2; } else { const int optimize_val = read_integral_parameter (p, p - 2, -1); if (optimize_val != -1) { optimize = optimize_val; optimize_size = 0; } } } /* APPLE LOCAL begin -fast or -fastf or -fastcp */ else if (argv[i][0] == '-' && argv[i][1] == 'f') { const char *p = &argv[i][2]; if (!strcmp(p, "ast")) flag_fast = 1; else if (!strcmp(p, "astf")) flag_fastf = 1; else if (!strcmp(p, "astcp")) flag_fastcp = 1; } /* APPLE LOCAL end -fast or -fastf */ } /* APPLE LOCAL begin -fast or -fastf or -fastcp */ if (flag_fast || flag_fastf || flag_fastcp ) { optimize = 3; optimize_size = 0; /* This goes here, rather than in rs6000.c, so that later -fcommon can override it. */ if (flag_fast || flag_fastcp) flag_no_common = 1; } /* APPLE LOCAL end -fast or -fastf or -fastcp */ /* APPLE LOCAL radar 2866081: Env. variable -O override ilr */ override_O_option (); if (!optimize) { flag_merge_constants = 0; } if (optimize >= 1) { flag_defer_pop = 1; flag_thread_jumps = 1; #ifdef DELAY_SLOTS flag_delayed_branch = 1; #endif #ifdef CAN_DEBUG_WITHOUT_FP flag_omit_frame_pointer = 1; #endif flag_guess_branch_prob = 1; flag_cprop_registers = 1; flag_loop_optimize2 = 1; flag_if_conversion = 1; flag_if_conversion2 = 1; flag_tree_ccp = 1; flag_tree_dce = 1; flag_tree_dom = 1; flag_tree_dse = 1; flag_tree_loop = 1; flag_tree_vectorize = 0; flag_tree_pre = 1; flag_scalar_evolutions = 0; flag_all_data_deps = 0; flag_tree_elim_checks = 0; flag_ddg = 0; flag_tree_ter = 1; flag_tree_sra = 1; flag_tree_copyrename = 1; if (!optimize_size) { /* Loop header copying usually increases size of the code. This used not to be true, since quite often it is possible to verify that the condition is satisfied in the first iteration and therefore to eliminate it. Jump threading handles these cases now. */ flag_tree_ch = 1; } } if (optimize >= 2) { flag_crossjumping = 1; flag_optimize_sibling_calls = 1; flag_cse_follow_jumps = 1; flag_cse_skip_blocks = 1; flag_gcse = 1; flag_expensive_optimizations = 1; flag_strength_reduce = 1; flag_rerun_cse_after_loop = 1; flag_rerun_loop_opt = 1; flag_caller_saves = 1; flag_force_mem = 1; flag_peephole2 = 1; #ifdef INSN_SCHEDULING flag_schedule_insns = 1; flag_schedule_insns_after_reload = 1; #endif flag_regmove = 1; flag_strict_aliasing = 1; flag_delete_null_pointer_checks = 1; flag_reorder_blocks = 1; flag_reorder_functions = 1; flag_unit_at_a_time = 1; } if (optimize >= 3) { flag_inline_functions = 1; flag_rename_registers = 1; flag_unswitch_loops = 1; flag_web = 1; flag_gcse_after_reload = 1; } if (optimize < 2 || optimize_size) { align_loops = 1; align_jumps = 1; align_labels = 1; align_functions = 1; /* Don't reorder blocks when optimizing for size because extra jump insns may be created; also barrier may create extra padding. More correctly we should have a block reordering mode that tried to minimize the combined size of all the jumps. This would more or less automatically remove extra jumps, but would also try to use more short jumps instead of long jumps. */ flag_reorder_blocks = 0; /* APPLE LOCAL begin hot/cold partitioning */ flag_reorder_blocks_and_partition = 0; /* APPLE LOCAL end hot/cold partitioning */ } /* Initialize whether `char' is signed. */ flag_signed_char = DEFAULT_SIGNED_CHAR; /* Initialize how much space enums occupy, by default. */ flag_short_enums = targetm.default_short_enums (); /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can modify it. */ target_flags = 0; set_target_switch (""); /* Unwind tables are always present in an ABI-conformant IA-64 object file, so the default should be ON. */ #ifdef IA64_UNWIND_INFO flag_unwind_tables = IA64_UNWIND_INFO; #endif #ifdef OPTIMIZATION_OPTIONS /* Allow default optimizations to be specified on a per-machine basis. */ OPTIMIZATION_OPTIONS (optimize, optimize_size); #endif handle_options (argc, argv, lang_mask); if (flag_pie) flag_pic = flag_pie; if (flag_pic && !flag_pie) flag_shlib = 1; if (flag_no_inline == 2) flag_no_inline = 0; else flag_really_no_inline = flag_no_inline; /* Set flag_no_inline before the post_options () hook. The C front ends use it to determine tree inlining defaults. FIXME: such code should be lang-independent when all front ends use tree inlining, in which case it, and this condition, should be moved to the top of process_options() instead. */ if (optimize == 0) { /* Inlining does not work if not optimizing, so force it not to be done. */ flag_no_inline = 1; warn_inline = 0; /* The c_decode_option function and decode_option hook set this to `2' if -Wall is used, so we can avoid giving out lots of errors for people who don't realize what -Wall does. */ if (warn_uninitialized == 1) warning ("-Wuninitialized is not supported without -O"); } if (flag_really_no_inline == 2) flag_really_no_inline = flag_no_inline; /* APPLE LOCAL begin hot/cold partitioning */ /* The optimization to partition hot and cold basic blocks into separate sections of the .o and executable files does not work (currently) with exception handling. If flag_exceptions is turned on we need to turn off the partitioning optimization. */ if (flag_exceptions && flag_reorder_blocks_and_partition) { warning ("-freorder-blocks-and-partition does not work with exceptions"); flag_reorder_blocks_and_partition = 0; flag_reorder_blocks = 1; } /* APPLE LOCAL end hot/cold partitioning */ } /* Handle target- and language-independent options. Return zero to generate an "unknown option" message. */ static int common_handle_option (size_t scode, const char *arg, int value ATTRIBUTE_UNUSED) { enum opt_code code = (enum opt_code) scode; switch (code) { default: abort (); case OPT__help: print_help (); exit_after_options = true; break; case OPT__param: handle_param (arg); break; case OPT__target_help: display_target_options (); exit_after_options = true; break; case OPT__version: print_version (stderr, ""); exit_after_options = true; break; case OPT_G: g_switch_value = value; g_switch_set = true; break; case OPT_O: case OPT_Os: /* Currently handled in a prescan. */ break; case OPT_W: /* For backward compatibility, -W is the same as -Wextra. */ set_Wextra (value); break; case OPT_Waggregate_return: warn_aggregate_return = value; break; case OPT_Wcast_align: warn_cast_align = value; break; case OPT_Wdeprecated_declarations: warn_deprecated_decl = value; break; case OPT_Wdisabled_optimization: warn_disabled_optimization = value; break; case OPT_Werror: warnings_are_errors = value; break; case OPT_Wextra: set_Wextra (value); break; case OPT_Winline: warn_inline = value; break; case OPT_Wlarger_than_: larger_than_size = value; warn_larger_than = value != -1; break; case OPT_Wmissing_noreturn: warn_missing_noreturn = value; break; case OPT_Wpacked: warn_packed = value; break; case OPT_Wpadded: warn_padded = value; break; case OPT_Wshadow: warn_shadow = value; break; case OPT_Wstrict_aliasing: warn_strict_aliasing = value; break; case OPT_Wswitch: warn_switch = value; break; case OPT_Wswitch_default: warn_switch_default = value; break; case OPT_Wswitch_enum: warn_switch_enum = value; break; case OPT_Wsystem_headers: warn_system_headers = value; break; case OPT_Wuninitialized: warn_uninitialized = value; break; case OPT_Wunreachable_code: warn_notreached = value; break; case OPT_Wunused: set_Wunused (value); break; case OPT_Wunused_function: warn_unused_function = value; break; case OPT_Wunused_label: warn_unused_label = value; break; case OPT_Wunused_parameter: warn_unused_parameter = value; break; case OPT_Wunused_value: warn_unused_value = value; break; case OPT_Wunused_variable: warn_unused_variable = value; break; case OPT_aux_info: case OPT_aux_info_: aux_info_file_name = arg; flag_gen_aux_info = 1; break; case OPT_auxbase: aux_base_name = arg; break; case OPT_auxbase_strip: { char *tmp = xstrdup (arg); strip_off_ending (tmp, strlen (tmp)); if (tmp[0]) aux_base_name = tmp; } break; case OPT_d: decode_d_option (arg); break; case OPT_dumpbase: dump_base_name = arg; break; case OPT_fPIC: flag_pic = value + value; break; case OPT_fPIE: flag_pie = value + value; break; /* APPLE LOCAL begin -floop-transpose */ case OPT_floop_transpose: flag_loop_transpose = value; break; /* APPLE LOCAL end -floop-transpose */ case OPT_fabi_version_: flag_abi_version = value; break; case OPT_falign_functions: align_functions = !value; break; case OPT_falign_functions_: align_functions = value; break; case OPT_falign_jumps: align_jumps = !value; break; case OPT_falign_jumps_: align_jumps = value; break; case OPT_falign_labels: align_labels = !value; break; case OPT_falign_labels_: align_labels = value; break; case OPT_falign_loops: align_loops = !value; break; case OPT_falign_loops_: align_loops = value; break; case OPT_fargument_alias: flag_argument_noalias = !value; break; case OPT_fargument_noalias: flag_argument_noalias = value; break; case OPT_fargument_noalias_global: flag_argument_noalias = value + value; break; case OPT_fasynchronous_unwind_tables: flag_asynchronous_unwind_tables = value; break; case OPT_fbounds_check: flag_bounds_check = value; break; case OPT_fbranch_count_reg: flag_branch_on_count_reg = value; break; case OPT_fbranch_probabilities: flag_branch_probabilities_set = true; flag_branch_probabilities = value; break; case OPT_fbranch_target_load_optimize: flag_branch_target_load_optimize = value; break; case OPT_fbranch_target_load_optimize2: flag_branch_target_load_optimize2 = value; break; case OPT_fbtr_bb_exclusive: flag_btr_bb_exclusive = value; break; case OPT_fcall_used_: fix_register (arg, 0, 1); break; case OPT_fcall_saved_: fix_register (arg, 0, 0); break; case OPT_fcaller_saves: flag_caller_saves = value; break; case OPT_fcommon: flag_no_common = !value; break; case OPT_fcprop_registers: flag_cprop_registers = value; break; case OPT_fcrossjumping: flag_crossjumping = value; break; case OPT_fcse_follow_jumps: flag_cse_follow_jumps = value; break; case OPT_fcse_skip_blocks: flag_cse_skip_blocks = value; break; case OPT_fdata_sections: flag_data_sections = value; break; case OPT_fdefer_pop: flag_defer_pop = value; break; case OPT_fdelayed_branch: flag_delayed_branch = value; break; case OPT_fdelete_null_pointer_checks: flag_delete_null_pointer_checks = value; break; case OPT_fdiagnostics_show_location_: if (!strcmp (arg, "once")) diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE; else if (!strcmp (arg, "every-line")) diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE; else return 0; break; case OPT_fdump_: if (!dump_switch_p (arg)) return 0; break; case OPT_fdump_unnumbered: flag_dump_unnumbered = value; break; case OPT_feliminate_dwarf2_dups: flag_eliminate_dwarf2_dups = value; break; case OPT_feliminate_unused_debug_types: flag_eliminate_unused_debug_types = value; break; case OPT_feliminate_unused_debug_symbols: flag_debug_only_used_symbols = value; break; case OPT_fexceptions: flag_exceptions = value; break; case OPT_fexpensive_optimizations: flag_expensive_optimizations = value; break; case OPT_ffast_math: set_fast_math_flags (value); break; case OPT_ffinite_math_only: flag_finite_math_only = value; break; case OPT_ffixed_: fix_register (arg, 1, 1); break; case OPT_ffunction_cse: flag_no_function_cse = !value; break; case OPT_ffloat_store: flag_float_store = value; break; case OPT_fforce_addr: flag_force_addr = value; break; case OPT_fforce_mem: flag_force_mem = value; break; case OPT_ffunction_sections: flag_function_sections = value; break; case OPT_fgcse: flag_gcse = value; break; case OPT_fgcse_lm: flag_gcse_lm = value; break; case OPT_fgcse_sm: flag_gcse_sm = value; break; case OPT_fgcse_after_reload: flag_gcse_after_reload = value; break; case OPT_fgcse_las: flag_gcse_las = value; break; case OPT_fguess_branch_probability: flag_guess_branch_prob = value; break; case OPT_fident: flag_no_ident = !value; break; case OPT_fif_conversion: flag_if_conversion = value; break; case OPT_fif_conversion2: flag_if_conversion2 = value; break; case OPT_finhibit_size_directive: flag_inhibit_size_directive = value; break; case OPT_finline: flag_no_inline = !value; break; case OPT_finline_functions: flag_inline_functions = value; break; case OPT_finline_limit_: case OPT_finline_limit_eq: set_param_value ("max-inline-insns-single", value / 2); set_param_value ("max-inline-insns-auto", value / 2); set_param_value ("max-inline-insns-rtl", value); break; case OPT_finstrument_functions: flag_instrument_function_entry_exit = value; break; case OPT_fkeep_inline_functions: flag_keep_inline_functions =value; break; case OPT_fkeep_static_consts: flag_keep_static_consts = value; break; case OPT_fleading_underscore: flag_leading_underscore = value; break; case OPT_floop_optimize: flag_loop_optimize = value; break; case OPT_floop_optimize2: flag_loop_optimize2 = value; break; case OPT_fmath_errno: flag_errno_math = value; break; case OPT_fmem_report: mem_report = value; break; case OPT_fmerge_all_constants: flag_merge_constants = value + value; break; case OPT_fmerge_constants: flag_merge_constants = value; break; case OPT_fmessage_length_: pp_set_line_maximum_length (global_dc->printer, value); break; case OPT_fmove_all_movables: flag_move_all_movables = value; break; case OPT_fmudflap: flag_mudflap = value; break; case OPT_fmudflapth: flag_mudflap = value; flag_mudflap_threads = value; break; case OPT_fmudflapir: flag_mudflap_ignore_reads = value; break; case OPT_fnew_ra: flag_new_regalloc = value; break; case OPT_fnon_call_exceptions: flag_non_call_exceptions = value; break; case OPT_fomit_frame_pointer: flag_omit_frame_pointer = value; break; case OPT_foptimize_register_move: flag_regmove = value; break; case OPT_foptimize_sibling_calls: flag_optimize_sibling_calls = value; break; case OPT_fpack_struct: flag_pack_struct = value; break; case OPT_fpeel_loops: flag_peel_loops_set = true; flag_peel_loops = value; break; case OPT_fpcc_struct_return: flag_pcc_struct_return = value; break; case OPT_fpeephole: flag_no_peephole = !value; break; case OPT_fpeephole2: flag_peephole2 = value; break; case OPT_fpic: flag_pic = value; break; case OPT_fpie: flag_pie = value; break; case OPT_fprefetch_loop_arrays: flag_prefetch_loop_arrays = value; break; case OPT_fprofile: profile_flag = value; break; case OPT_fprofile_arcs: profile_arc_flag_set = true; profile_arc_flag = value; break; case OPT_fprofile_use: if (!flag_branch_probabilities_set) flag_branch_probabilities = value; if (!flag_profile_values_set) flag_profile_values = value; if (!flag_unroll_loops_set) flag_unroll_loops = value; if (!flag_peel_loops_set) flag_peel_loops = value; if (!flag_tracer_set) flag_tracer = value; if (!flag_value_profile_transformations_set) flag_value_profile_transformations = value; break; case OPT_fprofile_generate: if (!profile_arc_flag_set) profile_arc_flag = value; if (!flag_profile_values_set) flag_profile_values = value; if (!flag_value_profile_transformations_set) flag_value_profile_transformations = value; break; case OPT_fprofile_values: flag_profile_values_set = true; flag_profile_values = value; break; case OPT_fvpt: flag_value_profile_transformations_set = value; flag_value_profile_transformations = value; break; case OPT_frandom_seed: /* The real switch is -fno-random-seed. */ if (value) return 0; flag_random_seed = NULL; break; case OPT_frandom_seed_: flag_random_seed = arg; break; case OPT_freduce_all_givs: flag_reduce_all_givs = value; break; case OPT_freg_struct_return: flag_pcc_struct_return = !value; break; case OPT_fregmove: flag_regmove = value; break; case OPT_frename_registers: flag_rename_registers = value; break; case OPT_freorder_blocks: flag_reorder_blocks = value; break; /* APPLE LOCAL begin hot/cold partitioning */ case OPT_freorder_blocks_and_partition: flag_reorder_blocks_and_partition = value; break; /* APPLE LOCAL end hot/cold partitioning */ case OPT_freorder_functions: flag_reorder_functions = value; break; case OPT_frerun_cse_after_loop: flag_rerun_cse_after_loop = value; break; case OPT_frerun_loop_opt: flag_rerun_loop_opt = value; break; case OPT_frounding_math: flag_rounding_math = value; break; case OPT_fsched_interblock: flag_schedule_interblock = value; break; case OPT_fsched_spec: flag_schedule_speculative = value; break; case OPT_fsched_spec_load: flag_schedule_speculative_load = value; break; case OPT_fsched_spec_load_dangerous: flag_schedule_speculative_load_dangerous = value; break; case OPT_fsched_verbose_: #ifdef INSN_SCHEDULING fix_sched_param ("verbose", arg); break; #else return 0; #endif case OPT_fsched2_use_superblocks: flag_sched2_use_superblocks = value; break; case OPT_fsched2_use_traces: flag_sched2_use_traces = value; break; case OPT_fschedule_insns: flag_schedule_insns = value; break; case OPT_fschedule_insns2: flag_schedule_insns_after_reload = value; break; case OPT_fsched_stalled_insns: flag_sched_stalled_insns = value; break; case OPT_fsched_stalled_insns_: flag_sched_stalled_insns = value; if (flag_sched_stalled_insns == 0) flag_sched_stalled_insns = -1; break; case OPT_fsched_stalled_insns_dep: flag_sched_stalled_insns_dep = 1; break; case OPT_fsched_stalled_insns_dep_: flag_sched_stalled_insns_dep = value; break; case OPT_fshared_data: flag_shared_data = value; break; case OPT_fsignaling_nans: flag_signaling_nans = value; break; case OPT_fsingle_precision_constant: flag_single_precision_constant = value; break; case OPT_fstack_check: flag_stack_check = value; break; case OPT_fstack_limit: /* The real switch is -fno-stack-limit. */ if (value) return 0; stack_limit_rtx = NULL_RTX; break; case OPT_fstack_limit_register_: { int reg = decode_reg_name (arg); if (reg < 0) error ("unrecognized register name \"%s\"", arg); else stack_limit_rtx = gen_rtx_REG (Pmode, reg); } break; case OPT_fstack_limit_symbol_: stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (arg)); break; case OPT_fstrength_reduce: flag_strength_reduce = value; break; case OPT_fstrict_aliasing: flag_strict_aliasing = value; break; case OPT_fsyntax_only: flag_syntax_only = value; break; case OPT_ftest_coverage: flag_test_coverage = value; break; case OPT_fthread_jumps: flag_thread_jumps = value; break; case OPT_ftime_report: time_report = value; break; case OPT_ftls_model_: if (!strcmp (arg, "global-dynamic")) flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC; else if (!strcmp (arg, "local-dynamic")) flag_tls_default = TLS_MODEL_LOCAL_DYNAMIC; else if (!strcmp (arg, "initial-exec")) flag_tls_default = TLS_MODEL_INITIAL_EXEC; else if (!strcmp (arg, "local-exec")) flag_tls_default = TLS_MODEL_LOCAL_EXEC; else warning ("unknown tls-model \"%s\"", arg); break; case OPT_ftracer: flag_tracer_set = true; flag_tracer = value; break; case OPT_ftrapping_math: flag_trapping_math = value; break; case OPT_ftrapv: flag_trapv = value; break; case OPT_ftree_based_profiling: flag_tree_based_profiling = value; break; case OPT_ftree_ccp: flag_tree_ccp = value; break; case OPT_ftree_dce: flag_tree_dce = value; break; case OPT_fscalar_evolutions: flag_scalar_evolutions = value; break; case OPT_fall_data_deps: flag_all_data_deps = value; break; case OPT_ftree_loop_linear: flag_tree_loop_linear = value; break; case OPT_ftree_elim_checks: flag_tree_elim_checks = value; break; case OPT_ftree_ddg: flag_ddg = value; break; case OPT_ftree_vectorize: flag_tree_vectorize = value; break; case OPT_ftree_combine_temps: flag_tree_combine_temps = value; break; case OPT_ftree_ter: flag_tree_ter = value; break; case OPT_ftree_dominator_opts: flag_tree_dom = value; break; case OPT_ftree_copyrename: flag_tree_copyrename = value; break; case OPT_ftree_ch: flag_tree_ch = value; break; case OPT_ftree_dse: flag_tree_dse = value; break; case OPT_ftree_loop_optimize: flag_tree_loop = value; break; case OPT_ftree_sra: flag_tree_sra = value; break; case OPT_ftree_points_to_: if (!strcmp (arg, "andersen")) #ifdef HAVE_BANSHEE flag_tree_points_to = PTA_ANDERSEN; #else warning ("Andersen's PTA not available - libbanshee not compiled."); #endif else if (!strcmp (arg, "none")) flag_tree_points_to = PTA_NONE; else { warning ("`%s`: unknown points-to analysis algorithm", arg); return 0; } break; case OPT_ftree_pre: flag_tree_pre = value; break; case OPT_funit_at_a_time: flag_unit_at_a_time = value; break; case OPT_funroll_all_loops: flag_unroll_all_loops = value; break; case OPT_funroll_loops: flag_unroll_loops_set = true; flag_unroll_loops = value; break; case OPT_funsafe_math_optimizations: flag_unsafe_math_optimizations = value; break; case OPT_funswitch_loops: flag_unswitch_loops = value; break; case OPT_funwind_tables: flag_unwind_tables = value; break; case OPT_fvar_tracking: flag_var_tracking = value; break; case OPT_fverbose_asm: flag_verbose_asm = value; break; case OPT_fweb: flag_web = value; break; case OPT_fwrapv: flag_wrapv = value; break; case OPT_fzero_initialized_in_bss: flag_zero_initialized_in_bss = value; break; case OPT_g: set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, arg); break; case OPT_gcoff: set_debug_level (SDB_DEBUG, false, arg); break; case OPT_gdwarf_2: set_debug_level (DWARF2_DEBUG, false, arg); break; case OPT_ggdb: set_debug_level (NO_DEBUG, 2, arg); break; case OPT_gstabs: case OPT_gstabs_: set_debug_level (DBX_DEBUG, code == OPT_gstabs_, arg); break; case OPT_gvms: set_debug_level (VMS_DEBUG, false, arg); break; case OPT_gxcoff: case OPT_gxcoff_: set_debug_level (XCOFF_DEBUG, code == OPT_gxcoff_, arg); break; case OPT_m: set_target_switch (arg); break; case OPT_o: asm_file_name = arg; break; case OPT_p: profile_flag = 1; break; case OPT_pedantic: pedantic = 1; break; case OPT_pedantic_errors: flag_pedantic_errors = pedantic = 1; break; case OPT_quiet: quiet_flag = 1; break; case OPT_version: version_flag = 1; break; case OPT_w: inhibit_warnings = true; break; } return 1; } /* Handle --param NAME=VALUE. */ static void handle_param (const char *carg) { char *equal, *arg; int value; arg = xstrdup (carg); equal = strchr (arg, '='); if (!equal) error ("%s: --param arguments should be of the form NAME=VALUE", arg); else { value = integral_argument (equal + 1); if (value == -1) error ("invalid --param value `%s'", equal + 1); else { *equal = '\0'; set_param_value (arg, value); } } free (arg); } /* Handle -W and -Wextra. */ static void set_Wextra (int setting) { extra_warnings = setting; warn_unused_value = setting; warn_unused_parameter = (setting && maybe_warn_unused_parameter); /* We save the value of warn_uninitialized, since if they put -Wuninitialized on the command line, we need to generate a warning about not using it without also specifying -O. */ if (setting == 0) warn_uninitialized = 0; else if (warn_uninitialized != 1) warn_uninitialized = 2; } /* Initialize unused warning flags. */ void set_Wunused (int setting) { warn_unused_function = setting; warn_unused_label = setting; /* Unused function parameter warnings are reported when either ``-Wextra -Wunused'' or ``-Wunused-parameter'' is specified. Thus, if -Wextra has already been seen, set warn_unused_parameter; otherwise set maybe_warn_extra_parameter, which will be picked up by set_Wextra. */ maybe_warn_unused_parameter = setting; warn_unused_parameter = (setting && extra_warnings); warn_unused_variable = setting; warn_unused_value = setting; } /* The following routines are useful in setting all the flags that -ffast-math and -fno-fast-math imply. */ void set_fast_math_flags (int set) { flag_trapping_math = !set; flag_unsafe_math_optimizations = set; flag_finite_math_only = set; flag_errno_math = !set; if (set) { flag_signaling_nans = 0; flag_rounding_math = 0; } } /* Return true iff flags are set as if -ffast-math. */ bool fast_math_flags_set_p (void) { return (!flag_trapping_math && flag_unsafe_math_optimizations && flag_finite_math_only && !flag_errno_math); } /* Handle a debug output -g switch. EXTENDED is true or false to support extended output (2 is special and means "-ggdb" was given). */ static void set_debug_level (enum debug_info_type type, int extended, const char *arg) { static bool type_explicit; /* APPLE LOCAL gdb only used symbols ilr */ int g_all_len = 0; use_gnu_debug_info_extensions = extended; /* APPLE LOCAL begin gdb only used symbols ilr */ #ifdef DBX_ONLY_USED_SYMBOLS if (strncmp (arg, "full", 4) == 0 || strncmp (arg, "-full", 5) == 0) { char *p = (char *)arg + (*(char *)arg == '-') + 4; flag_debug_only_used_symbols = 0; if (*p == '-') ++p; g_all_len = p - arg; arg += g_all_len; } if (strncmp (arg, "used", 4) == 0 || strncmp (arg, "-used", 5) == 0) { char *p = (char *)arg + (*(char *)arg == '-') + 4; flag_debug_only_used_symbols = 1; if (*p == '-') ++p; g_all_len = p - arg; arg += g_all_len; } #endif /* APPLE LOCAL end gdb only used symbols ilr */ /* APPLE LOCAL begin Symbol Separation */ if (strncmp (arg, "repository", 10) == 0 || strncmp (arg, "-repository", 11) == 0) { char *p = (char *)arg + (*(char *)arg == '-') + 10; flag_grepository = 1; if (*p == '-') ++p; g_all_len = p - arg; arg += g_all_len; } /* APPLE LOCAL end Symbol Separation */ if (type == NO_DEBUG) { if (write_symbols == NO_DEBUG) { write_symbols = PREFERRED_DEBUGGING_TYPE; if (extended == 2) { #ifdef DWARF2_DEBUGGING_INFO write_symbols = DWARF2_DEBUG; #elif defined DBX_DEBUGGING_INFO write_symbols = DBX_DEBUG; #endif /* APPLE LOCAL begin dwarf */ /* Even though DWARF2_DEBUGGING_INFO is defined, use stabs for debugging symbols with -ggdb. Remove this local patch when we switch to dwarf. */ write_symbols = DBX_DEBUG; /* APPLE LOCAL end dwarf */ } if (write_symbols == NO_DEBUG) warning ("target system does not support debug output"); } } else { /* Does it conflict with an already selected type? */ if (type_explicit && write_symbols != NO_DEBUG && type != write_symbols) error ("debug format \"%s\" conflicts with prior selection", debug_type_names[type]); write_symbols = type; type_explicit = true; } /* A debug flag without a level defaults to level 2. */ if (*arg == '\0') { if (!debug_info_level) debug_info_level = 2; } else { debug_info_level = integral_argument (arg); if (debug_info_level == (unsigned int) -1) error ("unrecognised debug output level \"%s\"", arg); else if (debug_info_level > 3) error ("debug output level %s is too high", arg); } /* APPLE LOCAL Symbol Separation */ /* Save original value */ orig_write_symbols = write_symbols; } /* Output --help text. */ static void print_help (void) { size_t i; const char *p; GET_ENVIRONMENT (p, "COLUMNS"); if (p) { int value = atoi (p); if (value > 0) columns = value; } puts (_("The following options are language-independent:\n")); print_filtered_help (CL_COMMON); print_param_help (); for (i = 0; lang_names[i]; i++) { printf (_("The %s front end recognizes the following options:\n\n"), lang_names[i]); print_filtered_help (1U << i); } display_target_options (); } /* Print the help for --param. */ static void print_param_help (void) { size_t i; puts (_("The --param option recognizes the following as parameters:\n")); for (i = 0; i < LAST_PARAM; i++) { const char *help = compiler_params[i].help; const char *param = compiler_params[i].option; if (help == NULL || *help == '\0') help = undocumented_msg; /* Get the translation. */ help = _(help); wrap_help (help, param, strlen (param)); } putchar ('\n'); } /* Print help for a specific front-end, etc. */ static void print_filtered_help (unsigned int flag) { unsigned int i, len, filter, indent = 0; bool duplicates = false; const char *help, *opt, *tab; static char *printed; if (flag == CL_COMMON) { filter = flag; if (!printed) printed = xmalloc (cl_options_count); memset (printed, 0, cl_options_count); } else { /* Don't print COMMON options twice. */ filter = flag | CL_COMMON; for (i = 0; i < cl_options_count; i++) { if ((cl_options[i].flags & filter) != flag) continue; /* Skip help for internal switches. */ if (cl_options[i].flags & CL_UNDOCUMENTED) continue; /* Skip switches that have already been printed, mark them to be listed later. */ if (printed[i]) { duplicates = true; indent = print_switch (cl_options[i].opt_text, indent); } } if (duplicates) { putchar ('\n'); putchar ('\n'); } } for (i = 0; i < cl_options_count; i++) { if ((cl_options[i].flags & filter) != flag) continue; /* Skip help for internal switches. */ if (cl_options[i].flags & CL_UNDOCUMENTED) continue; /* Skip switches that have already been printed. */ if (printed[i]) continue; printed[i] = true; help = cl_options[i].help; if (!help) help = undocumented_msg; /* Get the translation. */ help = _(help); tab = strchr (help, '\t'); if (tab) { len = tab - help; opt = help; help = tab + 1; } else { opt = cl_options[i].opt_text; len = strlen (opt); } wrap_help (help, opt, len); } putchar ('\n'); } /* Output ITEM, of length ITEM_WIDTH, in the left column, followed by word-wrapped HELP in a second column. */ static unsigned int print_switch (const char *text, unsigned int indent) { unsigned int len = strlen (text) + 1; /* trailing comma */ if (indent) { putchar (','); if (indent + len > columns) { putchar ('\n'); putchar (' '); indent = 1; } } else putchar (' '); putchar (' '); fputs (text, stdout); return indent + len + 1; } /* Output ITEM, of length ITEM_WIDTH, in the left column, followed by word-wrapped HELP in a second column. */ static void wrap_help (const char *help, const char *item, unsigned int item_width) { unsigned int col_width = 27; unsigned int remaining, room, len; remaining = strlen (help); do { room = columns - 3 - MAX (col_width, item_width); if (room > columns) room = 0; len = remaining; if (room < len) { unsigned int i; for (i = 0; help[i]; i++) { if (i >= room && len != remaining) break; if (help[i] == ' ') len = i; else if ((help[i] == '-' || help[i] == '/') && help[i + 1] != ' ' && i > 0 && ISALPHA (help[i - 1])) len = i + 1; } } printf( " %-*.*s %.*s\n", col_width, item_width, item, len, help); item_width = 0; while (help[len] == ' ') len++; help += len; remaining -= len; } while (remaining); }