1881 lines
44 KiB
C
1881 lines
44 KiB
C
/* Command line option handling.
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Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
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Contributed by Neil Booth.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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/* $FreeBSD$ */
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#include "config.h"
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#include "system.h"
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#include "intl.h"
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#include "coretypes.h"
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#include "tm.h"
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#include "tree.h"
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#include "rtl.h"
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#include "ggc.h"
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#include "output.h"
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#include "langhooks.h"
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#include "opts.h"
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#include "options.h"
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#include "flags.h"
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#include "toplev.h"
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#include "params.h"
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#include "diagnostic.h"
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#include "tm_p.h" /* For OPTIMIZATION_OPTIONS. */
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#include "insn-attr.h" /* For INSN_SCHEDULING. */
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/* Value of the -G xx switch, and whether it was passed or not. */
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unsigned HOST_WIDE_INT g_switch_value;
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bool g_switch_set;
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/* True if we should exit after parsing options. */
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bool exit_after_options;
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/* If -version. */
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bool version_flag;
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/* Print various extra warnings. -W/-Wextra. */
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bool extra_warnings;
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/* Don't print warning messages. -w. */
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bool inhibit_warnings;
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/* Treat warnings as errors. -Werror. */
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bool warnings_are_errors;
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/* Warn if a function returns an aggregate, since there are often
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incompatible calling conventions for doing this. */
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bool warn_aggregate_return;
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/* Nonzero means warn about pointer casts that increase the required
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alignment of the target type (and might therefore lead to a crash
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due to a misaligned access). */
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bool warn_cast_align;
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/* Nonzero means warn about uses of __attribute__((deprecated))
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declarations. */
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bool warn_deprecated_decl = true;
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/* Warn when an optimization pass is disabled. */
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bool warn_disabled_optimization;
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/* Nonzero means warn if inline function is too large. */
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bool warn_inline;
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/* True to warn about any objects definitions whose size is larger
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than N bytes. Also want about function definitions whose returned
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values are larger than N bytes, where N is `larger_than_size'. */
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bool warn_larger_than;
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HOST_WIDE_INT larger_than_size;
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/* Warn about functions which might be candidates for attribute noreturn. */
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bool warn_missing_noreturn;
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/* True to warn about code which is never reached. */
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bool warn_notreached;
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/* Warn if packed attribute on struct is unnecessary and inefficient. */
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bool warn_packed;
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/* Warn when gcc pads a structure to an alignment boundary. */
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bool warn_padded;
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/* True means warn about all declarations which shadow others. */
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bool warn_shadow;
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/* Nonzero means warn about constructs which might not be
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strict-aliasing safe. */
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bool warn_strict_aliasing;
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/* True to warn if a switch on an enum, that does not have a default
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case, fails to have a case for every enum value. */
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bool warn_switch;
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/* Warn if a switch does not have a default case. */
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bool warn_switch_default;
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/* Warn if a switch on an enum fails to have a case for every enum
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value (regardless of the presence or otherwise of a default case). */
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bool warn_switch_enum;
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/* Don't suppress warnings from system headers. -Wsystem-headers. */
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bool warn_system_headers;
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/* True to warn about variables used before they are initialized. */
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int warn_uninitialized;
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/* True to warn about unused variables, functions et.al. */
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bool warn_unused_function;
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bool warn_unused_label;
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bool warn_unused_parameter;
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bool warn_unused_variable;
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bool warn_unused_value;
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/* Hack for cooperation between set_Wunused and set_Wextra. */
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static bool maybe_warn_unused_parameter;
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/* Type(s) of debugging information we are producing (if any). See
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flags.h for the definitions of the different possible types of
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debugging information. */
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enum debug_info_type write_symbols = NO_DEBUG;
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/* Level of debugging information we are producing. See flags.h for
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the definitions of the different possible levels. */
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enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
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/* Nonzero means use GNU-only extensions in the generated symbolic
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debugging information. Currently, this only has an effect when
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write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
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bool use_gnu_debug_info_extensions;
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/* Columns of --help display. */
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static unsigned int columns = 80;
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/* What to print when a switch has no documentation. */
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static const char undocumented_msg[] = N_("This switch lacks documentation");
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/* Used for bookkeeping on whether user set these flags so
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-fprofile-use/-fprofile-generate does not use them. */
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static bool profile_arc_flag_set, flag_profile_values_set;
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static bool flag_unroll_loops_set, flag_tracer_set;
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static bool flag_value_profile_transformations_set;
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static bool flag_peel_loops_set, flag_branch_probabilities_set;
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/* Input file names. */
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const char **in_fnames;
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unsigned num_in_fnames;
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static size_t find_opt (const char *, int);
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static int common_handle_option (size_t scode, const char *arg, int value);
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static void handle_param (const char *);
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static void set_Wextra (int);
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static unsigned int handle_option (const char **argv, unsigned int lang_mask);
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static char *write_langs (unsigned int lang_mask);
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static void complain_wrong_lang (const char *, const struct cl_option *,
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unsigned int lang_mask);
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static void handle_options (unsigned int, const char **, unsigned int);
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static void wrap_help (const char *help, const char *item, unsigned int);
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static void print_help (void);
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static void print_param_help (void);
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static void print_filtered_help (unsigned int flag);
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static unsigned int print_switch (const char *text, unsigned int indent);
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static void set_debug_level (enum debug_info_type type, int extended,
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const char *arg);
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/* Perform a binary search to find which option the command-line INPUT
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matches. Returns its index in the option array, and N_OPTS
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(cl_options_count) on failure.
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This routine is quite subtle. A normal binary search is not good
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enough because some options can be suffixed with an argument, and
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multiple sub-matches can occur, e.g. input of "-pedantic" matching
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the initial substring of "-pedantic-errors".
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A more complicated example is -gstabs. It should match "-g" with
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an argument of "stabs". Suppose, however, that the number and list
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of switches are such that the binary search tests "-gen-decls"
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before having tested "-g". This doesn't match, and as "-gen-decls"
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is less than "-gstabs", it will become the lower bound of the
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binary search range, and "-g" will never be seen. To resolve this
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issue, opts.sh makes "-gen-decls" point, via the back_chain member,
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to "-g" so that failed searches that end between "-gen-decls" and
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the lexicographically subsequent switch know to go back and see if
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"-g" causes a match (which it does in this example).
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This search is done in such a way that the longest match for the
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front end in question wins. If there is no match for the current
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front end, the longest match for a different front end is returned
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(or N_OPTS if none) and the caller emits an error message. */
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static size_t
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find_opt (const char *input, int lang_mask)
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{
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size_t mn, mx, md, opt_len;
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size_t match_wrong_lang;
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int comp;
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mn = 0;
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mx = cl_options_count;
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/* Find mn such this lexicographical inequality holds:
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cl_options[mn] <= input < cl_options[mn + 1]. */
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while (mx - mn > 1)
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{
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md = (mn + mx) / 2;
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opt_len = cl_options[md].opt_len;
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comp = strncmp (input, cl_options[md].opt_text + 1, opt_len);
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if (comp < 0)
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mx = md;
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else
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mn = md;
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}
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/* This is the switch that is the best match but for a different
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front end, or cl_options_count if there is no match at all. */
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match_wrong_lang = cl_options_count;
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/* Backtrace the chain of possible matches, returning the longest
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one, if any, that fits best. With current GCC switches, this
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loop executes at most twice. */
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do
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{
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const struct cl_option *opt = &cl_options[mn];
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/* Is this switch a prefix of the input? */
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if (!strncmp (input, opt->opt_text + 1, opt->opt_len))
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{
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/* If language is OK, and the match is exact or the switch
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takes a joined argument, return it. */
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if ((opt->flags & lang_mask)
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&& (input[opt->opt_len] == '\0' || (opt->flags & CL_JOINED)))
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return mn;
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/* If we haven't remembered a prior match, remember this
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one. Any prior match is necessarily better. */
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if (match_wrong_lang == cl_options_count)
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match_wrong_lang = mn;
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}
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/* Try the next possibility. This is cl_options_count if there
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are no more. */
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mn = opt->back_chain;
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}
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while (mn != cl_options_count);
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/* Return the best wrong match, or cl_options_count if none. */
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return match_wrong_lang;
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}
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/* If ARG is a non-negative integer made up solely of digits, return its
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value, otherwise return -1. */
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static int
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integral_argument (const char *arg)
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{
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const char *p = arg;
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while (*p && ISDIGIT (*p))
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p++;
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if (*p == '\0')
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return atoi (arg);
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return -1;
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}
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/* Return a malloced slash-separated list of languages in MASK. */
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static char *
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write_langs (unsigned int mask)
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{
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unsigned int n = 0, len = 0;
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const char *lang_name;
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char *result;
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for (n = 0; (lang_name = lang_names[n]) != 0; n++)
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if (mask & (1U << n))
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len += strlen (lang_name) + 1;
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result = xmalloc (len);
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len = 0;
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for (n = 0; (lang_name = lang_names[n]) != 0; n++)
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if (mask & (1U << n))
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{
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if (len)
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result[len++] = '/';
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strcpy (result + len, lang_name);
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len += strlen (lang_name);
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}
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result[len] = 0;
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return result;
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}
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/* Complain that switch OPT_INDEX does not apply to this front end. */
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static void
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complain_wrong_lang (const char *text, const struct cl_option *option,
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unsigned int lang_mask)
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{
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char *ok_langs, *bad_lang;
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ok_langs = write_langs (option->flags);
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bad_lang = write_langs (lang_mask);
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/* Eventually this should become a hard error IMO. */
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warning ("command line option \"%s\" is valid for %s but not for %s",
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text, ok_langs, bad_lang);
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free (ok_langs);
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free (bad_lang);
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}
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/* Handle the switch beginning at ARGV for the language indicated by
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LANG_MASK. Returns the number of switches consumed. */
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static unsigned int
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handle_option (const char **argv, unsigned int lang_mask)
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{
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size_t opt_index;
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const char *opt, *arg = 0;
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char *dup = 0;
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int value = 1;
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unsigned int result = 0;
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const struct cl_option *option;
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opt = argv[0];
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/* Drop the "no-" from negative switches. */
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if ((opt[1] == 'W' || opt[1] == 'f')
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&& opt[2] == 'n' && opt[3] == 'o' && opt[4] == '-')
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{
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size_t len = strlen (opt) - 3;
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dup = xmalloc (len + 1);
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dup[0] = '-';
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dup[1] = opt[1];
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memcpy (dup + 2, opt + 5, len - 2 + 1);
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opt = dup;
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value = 0;
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}
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opt_index = find_opt (opt + 1, lang_mask | CL_COMMON);
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if (opt_index == cl_options_count)
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goto done;
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option = &cl_options[opt_index];
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/* Reject negative form of switches that don't take negatives as
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unrecognized. */
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if (!value && (option->flags & CL_REJECT_NEGATIVE))
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goto done;
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/* We've recognized this switch. */
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result = 1;
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/* Sort out any argument the switch takes. */
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if (option->flags & CL_JOINED)
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{
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/* Have arg point to the original switch. This is because
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some code, such as disable_builtin_function, expects its
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argument to be persistent until the program exits. */
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arg = argv[0] + cl_options[opt_index].opt_len + 1;
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if (!value)
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arg += strlen ("no-");
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if (*arg == '\0' && !(option->flags & CL_MISSING_OK))
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{
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if (option->flags & CL_SEPARATE)
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{
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arg = argv[1];
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result = 2;
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}
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else
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/* Missing argument. */
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arg = NULL;
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}
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}
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else if (option->flags & CL_SEPARATE)
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{
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arg = argv[1];
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result = 2;
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}
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/* Now we've swallowed any potential argument, complain if this
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is a switch for a different front end. */
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if (!(option->flags & (lang_mask | CL_COMMON)))
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{
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complain_wrong_lang (argv[0], option, lang_mask);
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goto done;
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}
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if (arg == NULL && (option->flags & (CL_JOINED | CL_SEPARATE)))
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{
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if (!(*lang_hooks.missing_argument) (opt, opt_index))
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error ("missing argument to \"%s\"", opt);
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goto done;
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}
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/* If the switch takes an integer, convert it. */
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if (arg && (option->flags & CL_UINTEGER))
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{
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value = integral_argument (arg);
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if (value == -1)
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{
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error ("argument to \"%s\" should be a non-negative integer",
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option->opt_text);
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goto done;
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}
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}
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if (option->flags & lang_mask)
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if ((*lang_hooks.handle_option) (opt_index, arg, value) == 0)
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result = 0;
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if (result && (option->flags & CL_COMMON))
|
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if (common_handle_option (opt_index, arg, value) == 0)
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result = 0;
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done:
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if (dup)
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free (dup);
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return result;
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}
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/* Decode and handle the vector of command line options. LANG_MASK
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contains has a single bit set representing the current
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language. */
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static void
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handle_options (unsigned int argc, const char **argv, unsigned int lang_mask)
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{
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unsigned int n, i;
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for (i = 1; i < argc; i += n)
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{
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const char *opt = argv[i];
|
|
|
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/* Interpret "-" or a non-switch as a file name. */
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if (opt[0] != '-' || opt[1] == '\0')
|
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{
|
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if (main_input_filename == NULL)
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main_input_filename = opt;
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add_input_filename (opt);
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n = 1;
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continue;
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}
|
|
|
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n = handle_option (argv + i, lang_mask);
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|
|
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if (!n)
|
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{
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n = 1;
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error ("unrecognized command line option \"%s\"", opt);
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}
|
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}
|
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}
|
|
|
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/* Handle FILENAME from the command line. */
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|
void
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add_input_filename (const char *filename)
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|
{
|
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num_in_fnames++;
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in_fnames = xrealloc (in_fnames, num_in_fnames * sizeof (in_fnames[0]));
|
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in_fnames[num_in_fnames - 1] = filename;
|
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}
|
|
|
|
/* Parse command line options and set default flag values. Do minimal
|
|
options processing. */
|
|
void
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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++)
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|
{
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|
if (!strcmp (argv[i], "-O"))
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{
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optimize = 1;
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|
optimize_size = 0;
|
|
}
|
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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;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
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_optimize = 1;
|
|
flag_if_conversion = 1;
|
|
flag_if_conversion2 = 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;
|
|
}
|
|
|
|
if (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;
|
|
}
|
|
|
|
/* Initialize whether `char' is signed. */
|
|
flag_signed_char = DEFAULT_SIGNED_CHAR;
|
|
#ifdef DEFAULT_SHORT_ENUMS
|
|
/* Initialize how much space enums occupy, by default. */
|
|
flag_short_enums = DEFAULT_SHORT_ENUMS;
|
|
#endif
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/* 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;
|
|
|
|
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_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_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_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_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_fnew_ra:
|
|
flag_new_regalloc = value;
|
|
break;
|
|
|
|
case OPT_fnon_call_exceptions:
|
|
flag_non_call_exceptions = value;
|
|
break;
|
|
|
|
case OPT_fold_unroll_all_loops:
|
|
flag_old_unroll_all_loops = value;
|
|
break;
|
|
|
|
case OPT_fold_unroll_loops:
|
|
flag_old_unroll_loops = 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;
|
|
|
|
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_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_fverbose_asm:
|
|
flag_verbose_asm = value;
|
|
break;
|
|
|
|
case OPT_fweb:
|
|
flag_web = value;
|
|
break;
|
|
|
|
case OPT_fwrapv:
|
|
flag_wrapv = value;
|
|
break;
|
|
|
|
case OPT_fwritable_strings:
|
|
flag_writable_strings = value;
|
|
if (flag_writable_strings)
|
|
inform ("-fwritable-strings is deprecated; "
|
|
"see documentation for details");
|
|
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;
|
|
|
|
use_gnu_debug_info_extensions = extended;
|
|
|
|
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
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
/* 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);
|
|
}
|