// options.c -- handle command line options for gold
-// Copyright 2006, 2007 Free Software Foundation, Inc.
+// Copyright (C) 2006-2020 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
#include "gold.h"
+#include <cerrno>
#include <cstdlib>
+#include <cstring>
+#include <fstream>
+#include <vector>
#include <iostream>
#include <sys/stat.h>
#include "filenames.h"
#include "libiberty.h"
+#include "demangle.h"
+#include "../bfd/bfdver.h"
#include "debug.h"
+#include "script.h"
+#include "target-select.h"
#include "options.h"
+#include "plugin.h"
namespace gold
{
-// The information we keep for a single command line option.
+General_options
+Position_dependent_options::default_options_;
-struct options::One_option
+namespace options
{
- // The single character option name, or '\0' if this is only a long
- // option.
- char short_option;
- // The long option name, or NULL if this is only a short option.
- const char* long_option;
+// This flag is TRUE if we should register the command-line options as they
+// are constructed. It is set after construction of the options within
+// class Position_dependent_options.
+static bool ready_to_register = false;
- // Description of the option for --help output, or NULL if there is none.
- const char* doc;
+// This global variable is set up as General_options is constructed.
+static std::vector<const One_option*> registered_options;
- // How to print the option name in --help output, or NULL to use the
- // default.
- const char* help_output;
+// These are set up at the same time -- the variables that accept one
+// dash, two, or require -z. A single variable may be in more than
+// one of these data structures.
+typedef Unordered_map<std::string, One_option*> Option_map;
+static Option_map* long_options = NULL;
+static One_option* short_options[128];
- // Long option dash control. This is ignored if long_option is
- // NULL.
- enum
+void
+One_option::register_option()
+{
+ if (!ready_to_register)
+ return;
+
+ registered_options.push_back(this);
+
+ // We can't make long_options a static Option_map because we can't
+ // guarantee that will be initialized before register_option() is
+ // first called.
+ if (long_options == NULL)
+ long_options = new Option_map;
+
+ // TWO_DASHES means that two dashes are preferred, but one is ok too.
+ if (!this->longname.empty())
+ (*long_options)[this->longname] = this;
+
+ const int shortname_as_int = static_cast<int>(this->shortname);
+ gold_assert(shortname_as_int >= 0 && shortname_as_int < 128);
+ if (this->shortname != '\0')
+ {
+ gold_assert(short_options[shortname_as_int] == NULL);
+ short_options[shortname_as_int] = this;
+ }
+}
+
+void
+One_option::print() const
+{
+ bool comma = false;
+ printf(" ");
+ int len = 2;
+ if (this->shortname != '\0')
+ {
+ len += printf("-%c", this->shortname);
+ if (this->helparg)
+ {
+ // -z takes long-names only.
+ gold_assert(this->dashes != DASH_Z);
+ len += printf(" %s", gettext(this->helparg));
+ }
+ comma = true;
+ }
+ if (!this->longname.empty()
+ && !(this->longname[0] == this->shortname
+ && this->longname[1] == '\0'))
+ {
+ if (comma)
+ len += printf(", ");
+ switch (this->dashes)
+ {
+ case options::ONE_DASH: case options::EXACTLY_ONE_DASH:
+ len += printf("-");
+ break;
+ case options::TWO_DASHES: case options::EXACTLY_TWO_DASHES:
+ len += printf("--");
+ break;
+ case options::DASH_Z:
+ len += printf("-z ");
+ break;
+ default:
+ gold_unreachable();
+ }
+ len += printf("%s", this->longname.c_str());
+ if (this->helparg)
+ {
+ // For most options, we print "--frob FOO". But for -z
+ // we print "-z frob=FOO".
+ len += printf("%c%s", this->dashes == options::DASH_Z ? '=' : ' ',
+ gettext(this->helparg));
+ }
+ }
+
+ if (len >= 30)
+ {
+ printf("\n");
+ len = 0;
+ }
+ for (; len < 30; ++len)
+ std::putchar(' ');
+
+ printf("%s", gettext(this->helpstring));
+ if (this->is_default)
+ printf(" (%s)", _("default"));
+ printf("\n");
+}
+
+void
+help()
+{
+ printf(_("Usage: %s [options] file...\nOptions:\n"), gold::program_name);
+
+ std::vector<const One_option*>::const_iterator it;
+ for (it = registered_options.begin(); it != registered_options.end(); ++it)
+ (*it)->print();
+
+ // config.guess and libtool.m4 look in ld --help output for the
+ // string "supported targets".
+ printf(_("%s: supported targets:"), gold::program_name);
+ std::vector<const char*> supported_names;
+ gold::supported_target_names(&supported_names);
+ for (std::vector<const char*>::const_iterator p = supported_names.begin();
+ p != supported_names.end();
+ ++p)
+ printf(" %s", *p);
+ printf("\n");
+
+ printf(_("%s: supported emulations:"), gold::program_name);
+ supported_names.clear();
+ gold::supported_emulation_names(&supported_names);
+ for (std::vector<const char*>::const_iterator p = supported_names.begin();
+ p != supported_names.end();
+ ++p)
+ printf(" %s", *p);
+ printf("\n");
+
+ // REPORT_BUGS_TO is defined in bfd/bfdver.h.
+ const char* report = REPORT_BUGS_TO;
+ if (*report != '\0')
+ printf(_("Report bugs to %s\n"), report);
+}
+
+// For bool, arg will be NULL (boolean options take no argument);
+// we always just set to true.
+void
+parse_bool(const char*, const char*, bool* retval)
+{
+ *retval = true;
+}
+
+void
+parse_uint(const char* option_name, const char* arg, int* retval)
+{
+ char* endptr;
+ *retval = strtol(arg, &endptr, 0);
+ if (*endptr != '\0' || *retval < 0)
+ gold_fatal(_("%s: invalid option value (expected an integer): %s"),
+ option_name, arg);
+}
+
+void
+parse_int(const char* option_name, const char* arg, int* retval)
+{
+ char* endptr;
+ *retval = strtol(arg, &endptr, 0);
+ if (*endptr != '\0')
+ gold_fatal(_("%s: invalid option value (expected an integer): %s"),
+ option_name, arg);
+}
+
+void
+parse_uint64(const char* option_name, const char* arg, uint64_t* retval)
+{
+ char* endptr;
+ *retval = strtoull(arg, &endptr, 0);
+ if (*endptr != '\0')
+ gold_fatal(_("%s: invalid option value (expected an integer): %s"),
+ option_name, arg);
+}
+
+void
+parse_double(const char* option_name, const char* arg, double* retval)
+{
+ char* endptr;
+ *retval = strtod(arg, &endptr);
+ if (*endptr != '\0')
+ gold_fatal(_("%s: invalid option value "
+ "(expected a floating point number): %s"),
+ option_name, arg);
+}
+
+void
+parse_percent(const char* option_name, const char* arg, double* retval)
+{
+ char* endptr;
+ *retval = strtod(arg, &endptr) / 100.0;
+ if (*endptr != '\0')
+ gold_fatal(_("%s: invalid option value "
+ "(expected a floating point number): %s"),
+ option_name, arg);
+}
+
+void
+parse_string(const char* option_name, const char* arg, const char** retval)
+{
+ if (*arg == '\0')
+ gold_fatal(_("%s: must take a non-empty argument"), option_name);
+ *retval = arg;
+}
+
+void
+parse_optional_string(const char*, const char* arg, const char** retval)
+{
+ *retval = arg;
+}
+
+void
+parse_dirlist(const char*, const char* arg, Dir_list* retval)
+{
+ retval->push_back(Search_directory(arg, false));
+}
+
+void
+parse_set(const char*, const char* arg, String_set* retval)
+{
+ retval->insert(std::string(arg));
+}
+
+void
+parse_choices(const char* option_name, const char* arg, const char** retval,
+ const char* choices[], int num_choices)
+{
+ for (int i = 0; i < num_choices; i++)
+ if (strcmp(choices[i], arg) == 0)
+ {
+ *retval = arg;
+ return;
+ }
+
+ // If we get here, the user did not enter a valid choice, so we die.
+ std::string choices_list;
+ for (int i = 0; i < num_choices; i++)
{
- // Long option normally takes one dash; two dashes are also
- // accepted.
- ONE_DASH,
- // Long option normally takes two dashes; one dash is also
- // accepted.
- TWO_DASHES,
- // Long option always takes two dashes.
- EXACTLY_TWO_DASHES
- } dash;
-
- // Function for special handling, or NULL. Returns the number of
- // arguments to skip. This will normally be at least 1, but it may
- // be 0 if this function changes *argv. ARG points to the location
- // in *ARGV where the option starts, which may be helpful for a
- // short option.
- int (*special)(int argc, char** argv, char *arg, bool long_option,
- Command_line*);
-
- // If this is a position independent option which does not take an
- // argument, this is the member function to call to record it.
- void (General_options::*general_noarg)();
-
- // If this is a position independent function which takes an
- // argument, this is the member function to call to record it.
- void (General_options::*general_arg)(const char*);
-
- // If this is a position dependent option which does not take an
- // argument, this is the member function to call to record it.
- void (Position_dependent_options::*dependent_noarg)();
-
- // If this is a position dependent option which takes an argument,
- // this is the member function to record it.
- void (Position_dependent_options::*dependent_arg)(const char*);
-
- // Return whether this option takes an argument.
- bool
- takes_argument() const
- { return this->general_arg != NULL || this->dependent_arg != NULL; }
-};
-
-// We have a separate table for -z options.
-
-struct options::One_z_option
-{
- // The name of the option.
+ choices_list += choices[i];
+ if (i != num_choices - 1)
+ choices_list += ", ";
+ }
+ gold_fatal(_("%s: must take one of the following arguments: %s"),
+ option_name, choices_list.c_str());
+}
+
+} // End namespace options.
+
+// Define the handler for "special" options (set via DEFINE_special).
+
+void
+General_options::parse_help(const char*, const char*, Command_line*)
+{
+ options::help();
+ ::exit(EXIT_SUCCESS);
+}
+
+void
+General_options::parse_version(const char* opt, const char*, Command_line*)
+{
+ bool print_short = (opt[0] == '-' && opt[1] == 'v');
+ gold::print_version(print_short);
+ this->printed_version_ = true;
+ if (!print_short)
+ ::exit(EXIT_SUCCESS);
+}
+
+void
+General_options::parse_V(const char*, const char*, Command_line*)
+{
+ gold::print_version(true);
+ this->printed_version_ = true;
+
+ printf(_(" Supported targets:\n"));
+ std::vector<const char*> supported_names;
+ gold::supported_target_names(&supported_names);
+ for (std::vector<const char*>::const_iterator p = supported_names.begin();
+ p != supported_names.end();
+ ++p)
+ printf(" %s\n", *p);
+
+ printf(_(" Supported emulations:\n"));
+ supported_names.clear();
+ gold::supported_emulation_names(&supported_names);
+ for (std::vector<const char*>::const_iterator p = supported_names.begin();
+ p != supported_names.end();
+ ++p)
+ printf(" %s\n", *p);
+}
+
+void
+General_options::parse_defsym(const char*, const char* arg,
+ Command_line* cmdline)
+{
+ cmdline->script_options().define_symbol(arg);
+}
+
+void
+General_options::parse_discard_all(const char*, const char*,
+ Command_line*)
+{
+ this->discard_locals_ = DISCARD_ALL;
+}
+
+void
+General_options::parse_discard_locals(const char*, const char*,
+ Command_line*)
+{
+ this->discard_locals_ = DISCARD_LOCALS;
+}
+
+void
+General_options::parse_discard_none(const char*, const char*,
+ Command_line*)
+{
+ this->discard_locals_ = DISCARD_NONE;
+}
+
+void
+General_options::parse_incremental(const char*, const char*,
+ Command_line*)
+{
+ this->incremental_mode_ = INCREMENTAL_AUTO;
+}
+
+void
+General_options::parse_no_incremental(const char*, const char*,
+ Command_line*)
+{
+ this->incremental_mode_ = INCREMENTAL_OFF;
+}
+
+void
+General_options::parse_incremental_full(const char*, const char*,
+ Command_line*)
+{
+ this->incremental_mode_ = INCREMENTAL_FULL;
+}
+
+void
+General_options::parse_incremental_update(const char*, const char*,
+ Command_line*)
+{
+ this->incremental_mode_ = INCREMENTAL_UPDATE;
+}
+
+void
+General_options::parse_incremental_changed(const char*, const char*,
+ Command_line*)
+{
+ this->implicit_incremental_ = true;
+ this->incremental_disposition_ = INCREMENTAL_CHANGED;
+}
+
+void
+General_options::parse_incremental_unchanged(const char*, const char*,
+ Command_line*)
+{
+ this->implicit_incremental_ = true;
+ this->incremental_disposition_ = INCREMENTAL_UNCHANGED;
+}
+
+void
+General_options::parse_incremental_unknown(const char*, const char*,
+ Command_line*)
+{
+ this->implicit_incremental_ = true;
+ this->incremental_disposition_ = INCREMENTAL_CHECK;
+}
+
+void
+General_options::parse_incremental_startup_unchanged(const char*, const char*,
+ Command_line*)
+{
+ this->implicit_incremental_ = true;
+ this->incremental_startup_disposition_ = INCREMENTAL_UNCHANGED;
+}
+
+void
+General_options::parse_library(const char*, const char* arg,
+ Command_line* cmdline)
+{
+ Input_file_argument::Input_file_type type;
const char* name;
+ if (arg[0] == ':')
+ {
+ type = Input_file_argument::INPUT_FILE_TYPE_SEARCHED_FILE;
+ name = arg + 1;
+ }
+ else
+ {
+ type = Input_file_argument::INPUT_FILE_TYPE_LIBRARY;
+ name = arg;
+ }
+ Input_file_argument file(name, type, "", false, *this);
+ cmdline->inputs().add_file(file);
+}
+
+void
+General_options::parse_plugin(const char*, const char* arg,
+ Command_line*)
+{
+ this->add_plugin(arg);
+}
+
+// Parse --plugin-opt.
+
+void
+General_options::parse_plugin_opt(const char*, const char* arg,
+ Command_line*)
+{
+ this->add_plugin_option(arg);
+}
+
+void
+General_options::parse_R(const char* option, const char* arg,
+ Command_line* cmdline)
+{
+ struct stat s;
+ if (::stat(arg, &s) != 0 || S_ISDIR(s.st_mode))
+ this->add_to_rpath(arg);
+ else
+ this->parse_just_symbols(option, arg, cmdline);
+}
+
+void
+General_options::parse_just_symbols(const char*, const char* arg,
+ Command_line* cmdline)
+{
+ Input_file_argument file(arg, Input_file_argument::INPUT_FILE_TYPE_FILE,
+ "", true, *this);
+ cmdline->inputs().add_file(file);
+}
+
+// Handle --section-start.
+
+void
+General_options::parse_section_start(const char*, const char* arg,
+ Command_line*)
+{
+ const char* eq = strchr(arg, '=');
+ if (eq == NULL)
+ {
+ gold_error(_("invalid argument to --section-start; "
+ "must be SECTION=ADDRESS"));
+ return;
+ }
+
+ std::string section_name(arg, eq - arg);
+
+ ++eq;
+ const char* val_start = eq;
+ if (eq[0] == '0' && (eq[1] == 'x' || eq[1] == 'X'))
+ eq += 2;
+ if (*eq == '\0')
+ {
+ gold_error(_("--section-start address missing"));
+ return;
+ }
+ uint64_t addr = 0;
+ hex_init();
+ for (; *eq != '\0'; ++eq)
+ {
+ if (!hex_p(*eq))
+ {
+ gold_error(_("--section-start argument %s is not a valid hex number"),
+ val_start);
+ return;
+ }
+ addr <<= 4;
+ addr += hex_value(*eq);
+ }
+
+ this->section_starts_[section_name] = addr;
+}
+
+// Look up a --section-start value.
+
+bool
+General_options::section_start(const char* secname, uint64_t* paddr) const
+{
+ if (this->section_starts_.empty())
+ return false;
+ std::map<std::string, uint64_t>::const_iterator p =
+ this->section_starts_.find(secname);
+ if (p == this->section_starts_.end())
+ return false;
+ *paddr = p->second;
+ return true;
+}
+
+void
+General_options::parse_static(const char*, const char*, Command_line*)
+{
+ this->set_static(true);
+}
+
+void
+General_options::parse_script(const char*, const char* arg,
+ Command_line* cmdline)
+{
+ if (!read_commandline_script(arg, cmdline))
+ gold::gold_fatal(_("unable to parse script file %s"), arg);
+}
+
+void
+General_options::parse_version_script(const char*, const char* arg,
+ Command_line* cmdline)
+{
+ if (!read_version_script(arg, cmdline))
+ gold::gold_fatal(_("unable to parse version script file %s"), arg);
+}
+
+void
+General_options::parse_dynamic_list(const char*, const char* arg,
+ Command_line* cmdline)
+{
+ if (!read_dynamic_list(arg, cmdline, &this->dynamic_list_))
+ gold::gold_fatal(_("unable to parse dynamic-list script file %s"), arg);
+ this->have_dynamic_list_ = true;
+}
+
+void
+General_options::parse_start_group(const char*, const char*,
+ Command_line* cmdline)
+{
+ cmdline->inputs().start_group();
+}
+
+void
+General_options::parse_end_group(const char*, const char*,
+ Command_line* cmdline)
+{
+ cmdline->inputs().end_group();
+}
+
+void
+General_options::parse_start_lib(const char*, const char*,
+ Command_line* cmdline)
+{
+ cmdline->inputs().start_lib(cmdline->position_dependent_options());
+}
+
+void
+General_options::parse_end_lib(const char*, const char*,
+ Command_line* cmdline)
+{
+ cmdline->inputs().end_lib();
+}
+
+// The function add_excluded_libs() in ld/ldlang.c of GNU ld breaks up a list
+// of names separated by commas or colons and puts them in a linked list.
+// We implement the same parsing of names here but store names in an unordered
+// map to speed up searching of names.
+
+void
+General_options::parse_exclude_libs(const char*, const char* arg,
+ Command_line*)
+{
+ const char* p = arg;
+
+ while (*p != '\0')
+ {
+ size_t length = strcspn(p, ",:");
+ this->excluded_libs_.insert(std::string(p, length));
+ p += (p[length] ? length + 1 : length);
+ }
+}
+
+// The checking logic is based on the function check_excluded_libs() in
+// ld/ldlang.c of GNU ld but our implementation is different because we use
+// an unordered map instead of a linked list, which is what GNU ld uses. GNU
+// ld searches sequentially in the excluded libs list. For a given archive,
+// a match is found if the archive's name matches exactly one of the list
+// entry or if the archive's name is of the form FOO.a and FOO matches exactly
+// one of the list entry. An entry "ALL" in the list is considered as a
+// wild-card and matches any given name.
+
+bool
+General_options::check_excluded_libs(const std::string &name) const
+{
+ Unordered_set<std::string>::const_iterator p;
+
+ // Exit early for the most common case.
+ if (excluded_libs_.empty())
+ return false;
+
+ // If we see "ALL", all archives are excluded from automatic export.
+ p = excluded_libs_.find(std::string("ALL"));
+ if (p != excluded_libs_.end())
+ return true;
+
+ // First strip off any directories in name.
+ const char* basename = lbasename(name.c_str());
+
+ // Try finding an exact match.
+ p = excluded_libs_.find(std::string(basename));
+ if (p != excluded_libs_.end())
+ return true;
+
+ // Try matching NAME without ".a" at the end.
+ size_t length = strlen(basename);
+ if ((length >= 2)
+ && (basename[length - 2] == '.')
+ && (basename[length - 1] == 'a'))
+ {
+ p = excluded_libs_.find(std::string(basename, length - 2));
+ if (p != excluded_libs_.end())
+ return true;
+ }
+
+ return false;
+}
+
+// Recognize input and output target names. The GNU linker accepts
+// these with --format and --oformat. This code is intended to be
+// minimally compatible. In practice for an ELF target this would be
+// the same target as the input files; that name always start with
+// "elf". Non-ELF targets would be "srec", "symbolsrec", "tekhex",
+// "binary", "ihex".
+
+General_options::Object_format
+General_options::string_to_object_format(const char* arg)
+{
+ if (strncmp(arg, "elf", 3) == 0 || strcmp(arg, "default") == 0)
+ return gold::General_options::OBJECT_FORMAT_ELF;
+ else if (strcmp(arg, "binary") == 0)
+ return gold::General_options::OBJECT_FORMAT_BINARY;
+ else
+ {
+ gold::gold_error(_("format '%s' not supported; treating as elf "
+ "(supported formats: elf, binary)"),
+ arg);
+ return gold::General_options::OBJECT_FORMAT_ELF;
+ }
+}
+
+const char*
+General_options::object_format_to_string(General_options::Object_format fmt)
+{
+ switch (fmt)
+ {
+ case General_options::OBJECT_FORMAT_ELF:
+ return "elf";
+ case General_options::OBJECT_FORMAT_BINARY:
+ return "binary";
+ default:
+ gold_unreachable();
+ }
+}
+
+void
+General_options::parse_fix_v4bx(const char*, const char*,
+ Command_line*)
+{
+ this->fix_v4bx_ = FIX_V4BX_REPLACE;
+}
+
+void
+General_options::parse_fix_v4bx_interworking(const char*, const char*,
+ Command_line*)
+{
+ this->fix_v4bx_ = FIX_V4BX_INTERWORKING;
+}
+
+void
+General_options::parse_EB(const char*, const char*, Command_line*)
+{
+ this->endianness_ = ENDIANNESS_BIG;
+}
+
+void
+General_options::parse_EL(const char*, const char*, Command_line*)
+{
+ this->endianness_ = ENDIANNESS_LITTLE;
+}
+
+void
+General_options::copy_from_posdep_options(
+ const Position_dependent_options& posdep)
+{
+ this->set_as_needed(posdep.as_needed());
+ this->set_Bdynamic(posdep.Bdynamic());
+ this->set_format(
+ General_options::object_format_to_string(posdep.format_enum()));
+ this->set_whole_archive(posdep.whole_archive());
+ this->set_incremental_disposition(posdep.incremental_disposition());
+}
+
+void
+General_options::parse_push_state(const char*, const char*, Command_line*)
+{
+ Position_dependent_options* posdep = new Position_dependent_options(*this);
+ this->options_stack_.push_back(posdep);
+}
+
+void
+General_options::parse_pop_state(const char*, const char*, Command_line*)
+{
+ if (this->options_stack_.empty())
+ {
+ gold::gold_error(_("unbalanced --push-state/--pop-state"));
+ return;
+ }
+ Position_dependent_options* posdep = this->options_stack_.back();
+ this->options_stack_.pop_back();
+ this->copy_from_posdep_options(*posdep);
+ delete posdep;
+}
+
+} // End namespace gold.
+
+namespace
+{
+
+void
+usage()
+{
+ fprintf(stderr,
+ _("%s: use the --help option for usage information\n"),
+ gold::program_name);
+ ::exit(EXIT_FAILURE);
+}
+
+void
+usage(const char* msg, const char* opt)
+{
+ fprintf(stderr,
+ _("%s: %s: %s\n"),
+ gold::program_name, opt, msg);
+ usage();
+}
+
+// If the default sysroot is relocatable, try relocating it based on
+// the prefix FROM.
+
+static char*
+get_relative_sysroot(const char* from)
+{
+ char* path = make_relative_prefix(gold::program_name, from,
+ TARGET_SYSTEM_ROOT);
+ if (path != NULL)
+ {
+ struct stat s;
+ if (::stat(path, &s) == 0 && S_ISDIR(s.st_mode))
+ return path;
+ free(path);
+ }
+
+ return NULL;
+}
+
+// Return the default sysroot. This is set by the --with-sysroot
+// option to configure. Note we do not free the return value of
+// get_relative_sysroot, which is a small memory leak, but is
+// necessary since we store this pointer directly in General_options.
+
+static const char*
+get_default_sysroot()
+{
+ const char* sysroot = TARGET_SYSTEM_ROOT;
+ if (*sysroot == '\0')
+ return NULL;
+
+ if (TARGET_SYSTEM_ROOT_RELOCATABLE)
+ {
+ char* path = get_relative_sysroot(BINDIR);
+ if (path == NULL)
+ path = get_relative_sysroot(TOOLBINDIR);
+ if (path != NULL)
+ return path;
+ }
+
+ return sysroot;
+}
+
+// Parse a long option. Such options have the form
+// <-|--><option>[=arg]. If "=arg" is not present but the option
+// takes an argument, the next word is taken to the be the argument.
+// If equals_only is set, then only the <option>=<arg> form is
+// accepted, not the <option><space><arg> form. Returns a One_option
+// struct or NULL if argv[i] cannot be parsed as a long option. In
+// the not-NULL case, *arg is set to the option's argument (NULL if
+// the option takes no argument), and *i is advanced past this option.
+// NOTE: it is safe for argv and arg to point to the same place.
+gold::options::One_option*
+parse_long_option(int argc, const char** argv, bool equals_only,
+ const char** arg, int* i)
+{
+ const char* const this_argv = argv[*i];
+
+ const char* equals = strchr(this_argv, '=');
+ const char* option_start = this_argv + strspn(this_argv, "-");
+ std::string option(option_start,
+ equals ? equals - option_start : strlen(option_start));
+
+ gold::options::Option_map::iterator it
+ = gold::options::long_options->find(option);
+ if (it == gold::options::long_options->end())
+ return NULL;
+
+ gold::options::One_option* retval = it->second;
- // The member function in General_options called to record it.
- void (General_options::*set)();
-};
+ // If the dash-count doesn't match, we fail.
+ if (this_argv[0] != '-') // no dashes at all: had better be "-z <longopt>"
+ {
+ if (retval->dashes != gold::options::DASH_Z)
+ return NULL;
+ }
+ else if (this_argv[1] != '-') // one dash
+ {
+ if (retval->dashes != gold::options::ONE_DASH
+ && retval->dashes != gold::options::EXACTLY_ONE_DASH
+ && retval->dashes != gold::options::TWO_DASHES)
+ return NULL;
+ }
+ else // two dashes (or more!)
+ {
+ if (retval->dashes != gold::options::TWO_DASHES
+ && retval->dashes != gold::options::EXACTLY_TWO_DASHES
+ && retval->dashes != gold::options::ONE_DASH)
+ return NULL;
+ }
-// We have a separate table for --debug options.
+ // Now that we know the option is good (or else bad in a way that
+ // will cause us to die), increment i to point past this argv.
+ ++(*i);
-struct options::One_debug_option
-{
- // The name of the option.
- const char* name;
+ // Figure out the option's argument, if any.
+ if (!retval->takes_argument())
+ {
+ if (equals)
+ usage(_("unexpected argument"), this_argv);
+ else
+ *arg = NULL;
+ }
+ else
+ {
+ if (equals)
+ *arg = equals + 1;
+ else if (retval->takes_optional_argument())
+ *arg = retval->default_value;
+ else if (*i < argc && !equals_only)
+ *arg = argv[(*i)++];
+ else
+ usage(_("missing argument"), this_argv);
+ }
- // The flags to turn on.
- unsigned int debug_flags;
-};
+ return retval;
+}
-class options::Command_line_options
+// Parse a short option. Such options have the form -<option>[arg].
+// If "arg" is not present but the option takes an argument, the next
+// word is taken to the be the argument. If the option does not take
+// an argument, it may be followed by another short option. Returns a
+// One_option struct or NULL if argv[i] cannot be parsed as a short
+// option. In the not-NULL case, *arg is set to the option's argument
+// (NULL if the option takes no argument), and *i is advanced past
+// this option. This function keeps *i the same if we parsed a short
+// option that does not take an argument, that looks to be followed by
+// another short option in the same word.
+gold::options::One_option*
+parse_short_option(int argc, const char** argv, int pos_in_argv_i,
+ const char** arg, int* i)
{
- public:
- static const One_option options[];
- static const int options_size;
- static const One_z_option z_options[];
- static const int z_options_size;
- static const One_debug_option debug_options[];
- static const int debug_options_size;
-};
+ const char* const this_argv = argv[*i];
+
+ if (this_argv[0] != '-')
+ return NULL;
+
+ // We handle -z as a special case.
+ static gold::options::One_option dash_z("", gold::options::DASH_Z,
+ 'z', "", NULL, "Z-OPTION", false,
+ NULL, false);
+ gold::options::One_option* retval = NULL;
+ if (this_argv[pos_in_argv_i] == 'z')
+ retval = &dash_z;
+ else
+ {
+ const int char_as_int = static_cast<int>(this_argv[pos_in_argv_i]);
+ if (char_as_int > 0 && char_as_int < 128)
+ retval = gold::options::short_options[char_as_int];
+ }
-} // End namespace gold.
+ if (retval == NULL)
+ return NULL;
-namespace
-{
+ // Figure out the option's argument, if any.
+ if (!retval->takes_argument())
+ {
+ *arg = NULL;
+ // We only advance past this argument if it's the only one in argv.
+ if (this_argv[pos_in_argv_i + 1] == '\0')
+ ++(*i);
+ }
+ else
+ {
+ // If we take an argument, we'll eat up this entire argv entry.
+ ++(*i);
+ if (this_argv[pos_in_argv_i + 1] != '\0')
+ *arg = this_argv + pos_in_argv_i + 1;
+ else if (retval->takes_optional_argument())
+ *arg = retval->default_value;
+ else if (*i < argc)
+ *arg = argv[(*i)++];
+ else
+ usage(_("missing argument"), this_argv);
+ }
-// Handle the special -l option, which adds an input file.
+ // If we're a -z option, we need to parse our argument as a
+ // long-option, e.g. "-z stacksize=8192".
+ if (retval == &dash_z)
+ {
+ int dummy_i = 0;
+ const char* dash_z_arg = *arg;
+ retval = parse_long_option(1, arg, true, arg, &dummy_i);
+ if (retval == NULL)
+ usage(_("unknown -z option"), dash_z_arg);
+ }
-int
-library(int argc, char** argv, char* arg, bool long_option,
- gold::Command_line* cmdline)
-{
- return cmdline->process_l_option(argc, argv, arg, long_option);
+ return retval;
}
-// Handle the special -T/--script option, which reads a linker script.
+} // End anonymous namespace.
-int
-invoke_script(int argc, char** argv, char* arg, bool long_option,
- gold::Command_line* cmdline)
+namespace gold
{
- int ret;
- const char* script_name = cmdline->get_special_argument("script", argc, argv,
- arg, long_option,
- &ret);
- if (!read_commandline_script(script_name, cmdline))
- gold::gold_error(_("unable to parse script file %s\n"), script_name);
- return ret;
-}
-// Handle the special --start-group option.
-
-int
-start_group(int, char**, char* arg, bool, gold::Command_line* cmdline)
+General_options::General_options()
+ : printed_version_(false),
+ execstack_status_(EXECSTACK_FROM_INPUT),
+ icf_status_(ICF_NONE),
+ static_(false),
+ do_demangle_(false),
+ plugins_(NULL),
+ dynamic_list_(),
+ have_dynamic_list_(false),
+ incremental_mode_(INCREMENTAL_OFF),
+ incremental_disposition_(INCREMENTAL_STARTUP),
+ incremental_startup_disposition_(INCREMENTAL_CHECK),
+ implicit_incremental_(false),
+ excluded_libs_(),
+ symbols_to_retain_(),
+ section_starts_(),
+ fix_v4bx_(FIX_V4BX_NONE),
+ endianness_(ENDIANNESS_NOT_SET),
+ discard_locals_(DISCARD_SEC_MERGE),
+ orphan_handling_enum_(ORPHAN_PLACE)
{
- cmdline->start_group(arg);
- return 1;
+ // Turn off option registration once construction is complete.
+ gold::options::ready_to_register = false;
}
-// Handle the special --end-group option.
+General_options::Object_format
+General_options::format_enum() const
+{
+ return General_options::string_to_object_format(this->format());
+}
-int
-end_group(int, char**, char* arg, bool, gold::Command_line* cmdline)
+General_options::Object_format
+General_options::oformat_enum() const
{
- cmdline->end_group(arg);
- return 1;
+ return General_options::string_to_object_format(this->oformat());
}
-// Report usage information for ld --help, and exit.
+// Add the sysroot, if any, to the search paths.
-int
-help(int, char**, char*, bool, gold::Command_line*)
+void
+General_options::add_sysroot()
{
- printf(_("Usage: %s [options] file...\nOptions:\n"), gold::program_name);
-
- const int options_size = gold::options::Command_line_options::options_size;
- const gold::options::One_option* options =
- gold::options::Command_line_options::options;
- for (int i = 0; i < options_size; ++i)
+ if (this->sysroot() == NULL || this->sysroot()[0] == '\0')
{
- if (options[i].doc == NULL)
- continue;
+ this->set_sysroot(get_default_sysroot());
+ if (this->sysroot() == NULL || this->sysroot()[0] == '\0')
+ return;
+ }
- printf(" ");
- int len = 2;
- bool comma = false;
+ char* canonical_sysroot = lrealpath(this->sysroot());
- int j = i;
- do
- {
- if (options[j].help_output != NULL)
- {
- if (comma)
- {
- printf(", ");
- len += 2;
- }
- printf(options[j].help_output);
- len += std::strlen(options[i].help_output);
- comma = true;
- }
- else
- {
- if (options[j].short_option != '\0')
- {
- if (comma)
- {
- printf(", ");
- len += 2;
- }
- printf("-%c", options[j].short_option);
- len += 2;
- comma = true;
- }
-
- if (options[j].long_option != NULL)
- {
- if (comma)
- {
- printf(", ");
- len += 2;
- }
- if (options[j].dash == gold::options::One_option::ONE_DASH)
- {
- printf("-");
- ++len;
- }
- else
- {
- printf("--");
- len += 2;
- }
- printf("%s", options[j].long_option);
- len += std::strlen(options[j].long_option);
- comma = true;
- }
- }
- ++j;
- }
- while (j < options_size && options[j].doc == NULL);
+ for (Dir_list::iterator p = this->library_path_.value.begin();
+ p != this->library_path_.value.end();
+ ++p)
+ p->add_sysroot(this->sysroot(), canonical_sysroot);
- if (len >= 30)
- {
- printf("\n");
- len = 0;
- }
- for (; len < 30; ++len)
- std::putchar(' ');
+ free(canonical_sysroot);
+}
- std::puts(options[i].doc);
+// Return whether FILENAME is in a system directory.
+
+bool
+General_options::is_in_system_directory(const std::string& filename) const
+{
+ for (Dir_list::const_iterator p = this->library_path_.value.begin();
+ p != this->library_path_.value.end();
+ ++p)
+ {
+ // We use a straight string comparison rather than calling
+ // FILENAME_CMP because we are only interested in the cases
+ // where we found the file in a system directory, which means
+ // that we used the directory name as a prefix for a -L search.
+ if (p->is_system_directory()
+ && filename.compare(0, p->name().size(), p->name()) == 0)
+ return true;
}
+ return false;
+}
- ::exit(EXIT_SUCCESS);
+// Add a plugin to the list of plugins.
- return 0;
+void
+General_options::add_plugin(const char* filename)
+{
+ if (this->plugins_ == NULL)
+ this->plugins_ = new Plugin_manager(*this);
+ this->plugins_->add_plugin(filename);
}
-// Report version information.
+// Add a plugin option to a plugin.
-int
-version(int, char**, char* opt, bool, gold::Command_line*)
+void
+General_options::add_plugin_option(const char* arg)
{
- gold::print_version(opt[0] == 'v' && opt[1] == '\0');
- ::exit(EXIT_SUCCESS);
- return 0;
+ if (this->plugins_ == NULL)
+ gold_fatal("--plugin-opt requires --plugin.");
+ this->plugins_->add_plugin_option(arg);
}
-// If the default sysroot is relocatable, try relocating it based on
-// the prefix FROM.
+// Set up variables and other state that isn't set up automatically by
+// the parse routine, and ensure options don't contradict each other
+// and are otherwise kosher.
-char*
-get_relative_sysroot(const char* from)
+void
+General_options::finalize()
{
- char* path = make_relative_prefix(gold::program_name, from,
- TARGET_SYSTEM_ROOT);
- if (path != NULL)
+ // Normalize the strip modifiers. They have a total order:
+ // strip_all > strip_debug > strip_non_line > strip_debug_gdb.
+ // If one is true, set all beneath it to true as well.
+ if (this->strip_all())
+ this->set_strip_debug(true);
+ if (this->strip_debug())
+ this->set_strip_debug_non_line(true);
+ if (this->strip_debug_non_line())
+ this->set_strip_debug_gdb(true);
+
+ if (this->Bshareable())
+ this->set_shared(true);
+
+ // If the user specifies both -s and -r, convert the -s to -S.
+ // -r requires us to keep externally visible symbols!
+ if (this->strip_all() && this->relocatable())
{
- struct stat s;
- if (::stat(path, &s) == 0 && S_ISDIR(s.st_mode))
- return path;
- free(path);
+ this->set_strip_all(false);
+ gold_assert(this->strip_debug());
}
- return NULL;
-}
-
-// Return the default sysroot. This is set by the --with-sysroot
-// option to configure.
-
-std::string
-get_default_sysroot()
-{
- const char* sysroot = TARGET_SYSTEM_ROOT;
- if (*sysroot == '\0')
- return "";
+ // For us, -dc and -dp are synonyms for --define-common.
+ if (this->dc())
+ this->set_define_common(true);
+ if (this->dp())
+ this->set_define_common(true);
+
+ // We also set --define-common if we're not relocatable, as long as
+ // the user didn't explicitly ask for something different.
+ if (!this->user_set_define_common())
+ this->set_define_common(!this->relocatable());
+
+ // execstack_status_ is a three-state variable; update it based on
+ // -z [no]execstack.
+ if (this->execstack())
+ this->set_execstack_status(EXECSTACK_YES);
+ else if (this->noexecstack())
+ this->set_execstack_status(EXECSTACK_NO);
+
+ // icf_status_ is a three-state variable; update it based on the
+ // value of this->icf().
+ if (strcmp(this->icf(), "none") == 0)
+ this->set_icf_status(ICF_NONE);
+ else if (strcmp(this->icf(), "safe") == 0)
+ this->set_icf_status(ICF_SAFE);
+ else
+ this->set_icf_status(ICF_ALL);
- if (TARGET_SYSTEM_ROOT_RELOCATABLE)
+ // Handle the optional argument for --demangle.
+ if (this->user_set_demangle())
{
- char* path = get_relative_sysroot (BINDIR);
- if (path == NULL)
- path = get_relative_sysroot (TOOLBINDIR);
- if (path != NULL)
+ this->set_do_demangle(true);
+ const char* style = this->demangle();
+ if (*style != '\0')
{
- std::string ret = path;
- free(path);
- return ret;
+ enum demangling_styles style_code;
+
+ style_code = cplus_demangle_name_to_style(style);
+ if (style_code == unknown_demangling)
+ gold_fatal("unknown demangling style '%s'", style);
+ cplus_demangle_set_style(style_code);
}
}
+ else if (this->user_set_no_demangle())
+ this->set_do_demangle(false);
+ else
+ {
+ // Testing COLLECT_NO_DEMANGLE makes our default demangling
+ // behaviour identical to that of gcc's linker wrapper.
+ this->set_do_demangle(getenv("COLLECT_NO_DEMANGLE") == NULL);
+ }
- return sysroot;
-}
-
-} // End anonymous namespace.
+ // Parse the --orphan-handling argument.
+ if (this->user_set_orphan_handling())
+ {
+ if (strcmp(this->orphan_handling(), "place") == 0)
+ this->set_orphan_handling_enum(ORPHAN_PLACE);
+ else if (strcmp(this->orphan_handling(), "discard") == 0)
+ this->set_orphan_handling_enum(ORPHAN_DISCARD);
+ else if (strcmp(this->orphan_handling(), "warn") == 0)
+ this->set_orphan_handling_enum(ORPHAN_WARN);
+ else if (strcmp(this->orphan_handling(), "error") == 0)
+ this->set_orphan_handling_enum(ORPHAN_ERROR);
+ }
-namespace gold
-{
+ // -M is equivalent to "-Map -".
+ if (this->print_map() && !this->user_set_Map())
+ {
+ this->set_Map("-");
+ this->set_user_set_Map();
+ }
-// Helper macros used to specify the options. We could also do this
-// using constructors, but then g++ would generate code to initialize
-// the array. We want the array to be initialized statically so that
-// we get better startup time.
-
-#define GENERAL_NOARG(short_option, long_option, doc, help, dash, func) \
- { short_option, long_option, doc, help, options::One_option::dash, \
- NULL, func, NULL, NULL, NULL }
-#define GENERAL_ARG(short_option, long_option, doc, help, dash, func) \
- { short_option, long_option, doc, help, options::One_option::dash, \
- NULL, NULL, func, NULL, NULL }
-#define POSDEP_NOARG(short_option, long_option, doc, help, dash, func) \
- { short_option, long_option, doc, help, options::One_option::dash, \
- NULL, NULL, NULL, func, NULL }
-#define POSDEP_ARG(short_option, long_option, doc, help, dash, func) \
- { short_option, long_option, doc, help, options::One_option::dash, \
- NULL, NULL, NULL, NULL, func }
-#define SPECIAL(short_option, long_option, doc, help, dash, func) \
- { short_option, long_option, doc, help, options::One_option::dash, \
- func, NULL, NULL, NULL, NULL }
-
-// Here is the actual list of options which we accept.
-
-const options::One_option
-options::Command_line_options::options[] =
-{
- GENERAL_NOARG('\0', "allow-shlib-undefined",
- N_("Allow unresolved references in shared libraries"),
- NULL, TWO_DASHES,
- &General_options::set_allow_shlib_undefined),
- GENERAL_NOARG('\0', "no-allow-shlib-undefined",
- N_("Do not allow unresolved references in shared libraries"),
- NULL, TWO_DASHES,
- &General_options::set_no_allow_shlib_undefined),
- POSDEP_NOARG('\0', "as-needed",
- N_("Only set DT_NEEDED for dynamic libs if used"),
- NULL, TWO_DASHES, &Position_dependent_options::set_as_needed),
- POSDEP_NOARG('\0', "no-as-needed",
- N_("Always DT_NEEDED for dynamic libs (default)"),
- NULL, TWO_DASHES, &Position_dependent_options::clear_as_needed),
- POSDEP_NOARG('\0', "Bdynamic",
- N_("-l searches for shared libraries"),
- NULL, ONE_DASH,
- &Position_dependent_options::set_dynamic_search),
- POSDEP_NOARG('\0', "Bstatic",
- N_("-l does not search for shared libraries"),
- NULL, ONE_DASH,
- &Position_dependent_options::set_static_search),
- GENERAL_NOARG('\0', "Bsymbolic", N_("Bind defined symbols locally"),
- NULL, ONE_DASH, &General_options::set_symbolic),
-#ifdef HAVE_ZLIB_H
-# define ZLIB_STR ",zlib"
-#else
-# define ZLIB_STR ""
+ // Using -n or -N implies -static.
+ if (this->nmagic() || this->omagic())
+ this->set_static(true);
+
+ // If --thread_count is specified, it applies to
+ // --thread-count-{initial,middle,final}, though it doesn't override
+ // them.
+ if (this->thread_count() > 0 && this->thread_count_initial() == 0)
+ this->set_thread_count_initial(this->thread_count());
+ if (this->thread_count() > 0 && this->thread_count_middle() == 0)
+ this->set_thread_count_middle(this->thread_count());
+ if (this->thread_count() > 0 && this->thread_count_final() == 0)
+ this->set_thread_count_final(this->thread_count());
+
+ // Let's warn if you set the thread-count but we're going to ignore it.
+#ifndef ENABLE_THREADS
+ if (this->threads())
+ {
+ gold_warning(_("ignoring --threads: "
+ "%s was compiled without thread support"),
+ program_name);
+ this->set_threads(false);
+ }
+ if (this->thread_count() > 0 || this->thread_count_initial() > 0
+ || this->thread_count_middle() > 0 || this->thread_count_final() > 0)
+ gold_warning(_("ignoring --thread-count: "
+ "%s was compiled without thread support"),
+ program_name);
#endif
- GENERAL_ARG('\0', "compress-debug-sections",
- N_("Compress .debug_* sections in the output file "
- "(default is none)"),
- N_("--compress-debug-sections=[none" ZLIB_STR "]"),
- TWO_DASHES,
- &General_options::set_compress_debug_sections),
- GENERAL_NOARG('\0', "demangle", N_("Demangle C++ symbols in log messages"),
- NULL, TWO_DASHES, &General_options::set_demangle),
- GENERAL_NOARG('\0', "no-demangle",
- N_("Do not demangle C++ symbols in log messages"),
- NULL, TWO_DASHES, &General_options::clear_demangle),
- GENERAL_NOARG('\0', "detect-odr-violations",
- N_("Try to detect violations of the One Definition Rule"),
- NULL, TWO_DASHES, &General_options::set_detect_odr_violations),
- GENERAL_ARG('e', "entry", N_("Set program start address"),
- N_("-e ADDRESS, --entry ADDRESS"), TWO_DASHES,
- &General_options::set_entry),
- GENERAL_NOARG('E', "export-dynamic", N_("Export all dynamic symbols"),
- NULL, TWO_DASHES, &General_options::set_export_dynamic),
- GENERAL_NOARG('\0', "eh-frame-hdr", N_("Create exception frame header"),
- NULL, TWO_DASHES, &General_options::set_create_eh_frame_hdr),
- GENERAL_ARG('h', "soname", N_("Set shared library name"),
- N_("-h FILENAME, -soname FILENAME"), ONE_DASH,
- &General_options::set_soname),
- GENERAL_ARG('I', "dynamic-linker", N_("Set dynamic linker path"),
- N_("-I PROGRAM, --dynamic-linker PROGRAM"), TWO_DASHES,
- &General_options::set_dynamic_linker),
- SPECIAL('l', "library", N_("Search for library LIBNAME"),
- N_("-lLIBNAME, --library LIBNAME"), TWO_DASHES,
- &library),
- GENERAL_ARG('L', "library-path", N_("Add directory to search path"),
- N_("-L DIR, --library-path DIR"), TWO_DASHES,
- &General_options::add_to_search_path),
- GENERAL_ARG('m', NULL, N_("Ignored for compatibility"), NULL, ONE_DASH,
- &General_options::ignore),
- GENERAL_ARG('o', "output", N_("Set output file name"),
- N_("-o FILE, --output FILE"), TWO_DASHES,
- &General_options::set_output_file_name),
- GENERAL_ARG('O', NULL, N_("Optimize output file size"),
- N_("-O level"), ONE_DASH,
- &General_options::set_optimization_level),
- GENERAL_NOARG('r', NULL, N_("Generate relocatable output"), NULL,
- ONE_DASH, &General_options::set_relocatable),
- GENERAL_ARG('R', "rpath", N_("Add DIR to runtime search path"),
- N_("-R DIR, -rpath DIR"), ONE_DASH,
- &General_options::add_to_rpath),
- GENERAL_ARG('\0', "rpath-link",
- N_("Add DIR to link time shared library search path"),
- N_("--rpath-link DIR"), TWO_DASHES,
- &General_options::add_to_rpath_link),
- GENERAL_NOARG('s', "strip-all", N_("Strip all symbols"), NULL,
- TWO_DASHES, &General_options::set_strip_all),
- GENERAL_NOARG('\0', "strip-debug-gdb",
- N_("Strip debug symbols that are unused by gdb "
- "(at least versions <= 6.7)"),
- NULL, TWO_DASHES, &General_options::set_strip_debug_gdb),
- // This must come after -Sdebug since it's a prefix of it.
- GENERAL_NOARG('S', "strip-debug", N_("Strip debugging information"), NULL,
- TWO_DASHES, &General_options::set_strip_debug),
- GENERAL_NOARG('\0', "shared", N_("Generate shared library"),
- NULL, ONE_DASH, &General_options::set_shared),
- GENERAL_NOARG('\0', "static", N_("Do not link against shared libraries"),
- NULL, ONE_DASH, &General_options::set_static),
- GENERAL_NOARG('\0', "stats", N_("Print resource usage statistics"),
- NULL, TWO_DASHES, &General_options::set_stats),
- GENERAL_ARG('\0', "sysroot", N_("Set target system root directory"),
- N_("--sysroot DIR"), TWO_DASHES, &General_options::set_sysroot),
- GENERAL_ARG('\0', "Ttext", N_("Set the address of the .text section"),
- N_("-Ttext ADDRESS"), ONE_DASH,
- &General_options::set_text_segment_address),
- // This must come after -Ttext since it's a prefix of it.
- SPECIAL('T', "script", N_("Read linker script"),
- N_("-T FILE, --script FILE"), TWO_DASHES,
- &invoke_script),
- GENERAL_NOARG('\0', "threads", N_("Run the linker multi-threaded"),
- NULL, TWO_DASHES, &General_options::set_threads),
- GENERAL_NOARG('\0', "no-threads", N_("Do not run the linker multi-threaded"),
- NULL, TWO_DASHES, &General_options::clear_threads),
- GENERAL_ARG('\0', "thread-count", N_("Number of threads to use"),
- N_("--thread-count COUNT"), TWO_DASHES,
- &General_options::set_thread_count),
- GENERAL_ARG('\0', "thread-count-initial",
- N_("Number of threads to use in initial pass"),
- N_("--thread-count-initial COUNT"), TWO_DASHES,
- &General_options::set_thread_count_initial),
- GENERAL_ARG('\0', "thread-count-middle",
- N_("Number of threads to use in middle pass"),
- N_("--thread-count-middle COUNT"), TWO_DASHES,
- &General_options::set_thread_count_middle),
- GENERAL_ARG('\0', "thread-count-final",
- N_("Number of threads to use in final pass"),
- N_("--thread-count-final COUNT"), TWO_DASHES,
- &General_options::set_thread_count_final),
- POSDEP_NOARG('\0', "whole-archive",
- N_("Include all archive contents"),
- NULL, TWO_DASHES,
- &Position_dependent_options::set_whole_archive),
- POSDEP_NOARG('\0', "no-whole-archive",
- N_("Include only needed archive contents"),
- NULL, TWO_DASHES,
- &Position_dependent_options::clear_whole_archive),
-
- GENERAL_ARG('z', NULL,
- N_("Subcommands as follows:\n\
- -z execstack Mark output as requiring executable stack\n\
- -z noexecstack Mark output as not requiring executable stack"),
- N_("-z SUBCOMMAND"), ONE_DASH,
- &General_options::handle_z_option),
-
- SPECIAL('(', "start-group", N_("Start a library search group"), NULL,
- TWO_DASHES, &start_group),
- SPECIAL(')', "end-group", N_("End a library search group"), NULL,
- TWO_DASHES, &end_group),
- SPECIAL('\0', "help", N_("Report usage information"), NULL,
- TWO_DASHES, &help),
- SPECIAL('v', "version", N_("Report version information"), NULL,
- TWO_DASHES, &version),
- GENERAL_ARG('\0', "debug", N_("Turn on debugging (all,task)"),
- N_("--debug=TYPE"), TWO_DASHES,
- &General_options::handle_debug_option)
-};
-
-const int options::Command_line_options::options_size =
- sizeof (options) / sizeof (options[0]);
-
-// The -z options.
-
-const options::One_z_option
-options::Command_line_options::z_options[] =
-{
- { "execstack", &General_options::set_execstack },
- { "noexecstack", &General_options::set_noexecstack },
-};
-
-const int options::Command_line_options::z_options_size =
- sizeof(z_options) / sizeof(z_options[0]);
-
-// The --debug options.
-
-const options::One_debug_option
-options::Command_line_options::debug_options[] =
-{
- { "all", DEBUG_ALL },
- { "task", DEBUG_TASK },
-};
-
-const int options::Command_line_options::debug_options_size =
- sizeof(debug_options) / sizeof(debug_options[0]);
-
-// The default values for the general options.
-General_options::General_options()
- : entry_(NULL),
- export_dynamic_(false),
- soname_(NULL),
- dynamic_linker_(NULL),
- search_path_(),
- optimization_level_(0),
- output_file_name_("a.out"),
- is_relocatable_(false),
- strip_(STRIP_NONE),
- allow_shlib_undefined_(false),
- symbolic_(false),
- compress_debug_sections_(NO_COMPRESSION),
- detect_odr_violations_(false),
- create_eh_frame_hdr_(false),
- rpath_(),
- rpath_link_(),
- is_shared_(false),
- is_static_(false),
- print_stats_(false),
- sysroot_(),
- text_segment_address_(-1U), // -1 indicates value not set by user
- threads_(false),
- thread_count_initial_(0),
- thread_count_middle_(0),
- thread_count_final_(0),
- execstack_(EXECSTACK_FROM_INPUT),
- debug_(0)
-{
- // We initialize demangle_ based on the environment variable
- // COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the
- // output of the linker, unless COLLECT_NO_DEMANGLE is set in the
- // environment. Acting the same way here lets us provide the same
- // interface by default.
- this->demangle_ = getenv("COLLECT_NO_DEMANGLE") == NULL;
-}
-
-// The default values for the position dependent options.
-
-Position_dependent_options::Position_dependent_options()
- : do_static_search_(false),
- as_needed_(false),
- include_whole_archive_(false)
-{
-}
-
-// Handle the -z option.
+#ifndef ENABLE_PLUGINS
+ if (this->has_plugins())
+ gold_fatal(_("cannot use --plugin: "
+ "%s was compiled without plugin support"),
+ program_name);
+#endif
-void
-General_options::handle_z_option(const char* arg)
-{
- const int z_options_size = options::Command_line_options::z_options_size;
- const gold::options::One_z_option* z_options =
- gold::options::Command_line_options::z_options;
- for (int i = 0; i < z_options_size; ++i)
+ std::string libpath;
+ if (this->user_set_Y())
+ {
+ libpath = this->Y();
+ if (libpath.compare(0, 2, "P,") == 0)
+ libpath.erase(0, 2);
+ }
+ else if (!this->nostdlib())
{
- if (strcmp(arg, z_options[i].name) == 0)
+#ifndef NATIVE_LINKER
+#define NATIVE_LINKER 0
+#endif
+ const char* p = LIB_PATH;
+ if (strcmp(p, "::DEFAULT::") != 0)
+ libpath = p;
+ else if (NATIVE_LINKER
+ || this->user_set_sysroot()
+ || *TARGET_SYSTEM_ROOT != '\0')
{
- (this->*(z_options[i].set))();
- return;
+ this->add_to_library_path_with_sysroot("/lib");
+ this->add_to_library_path_with_sysroot("/usr/lib");
}
+ else
+ this->add_to_library_path_with_sysroot(TOOLLIBDIR);
}
- fprintf(stderr, _("%s: unrecognized -z subcommand: %s\n"),
- program_name, arg);
- ::exit(EXIT_FAILURE);
-}
-
-// Handle the --debug option.
-
-void
-General_options::handle_debug_option(const char* arg)
-{
- const int debug_options_size =
- options::Command_line_options::debug_options_size;
- const gold::options::One_debug_option* debug_options =
- options::Command_line_options::debug_options;
- for (int i = 0; i < debug_options_size; ++i)
+ if (!libpath.empty())
{
- if (strcmp(arg, debug_options[i].name) == 0)
+ size_t pos = 0;
+ size_t next_pos;
+ do
{
- this->set_debug(debug_options[i].debug_flags);
- return;
+ next_pos = libpath.find(':', pos);
+ size_t len = (next_pos == std::string::npos
+ ? next_pos
+ : next_pos - pos);
+ if (len != 0)
+ this->add_to_library_path_with_sysroot(libpath.substr(pos, len));
+ pos = next_pos + 1;
}
+ while (next_pos != std::string::npos);
}
- fprintf(stderr, _("%s: unrecognized --debug subcommand: %s\n"),
- program_name, arg);
- ::exit(EXIT_FAILURE);
-}
-
-// Add the sysroot, if any, to the search paths.
+ // Parse the contents of -retain-symbols-file into a set.
+ if (this->retain_symbols_file())
+ {
+ std::ifstream in;
+ in.open(this->retain_symbols_file());
+ if (!in)
+ gold_fatal(_("unable to open -retain-symbols-file file %s: %s"),
+ this->retain_symbols_file(), strerror(errno));
+ std::string line;
+ std::getline(in, line); // this chops off the trailing \n, if any
+ while (in)
+ {
+ if (!line.empty() && line[line.length() - 1] == '\r') // Windows
+ line.resize(line.length() - 1);
+ this->symbols_to_retain_.insert(line);
+ std::getline(in, line);
+ }
+ }
-void
-General_options::add_sysroot()
-{
- if (this->sysroot_.empty())
+ // -Bgroup implies --unresolved-symbols=report-all.
+ if (this->Bgroup() && !this->user_set_unresolved_symbols())
+ this->set_unresolved_symbols("report-all");
+
+ // -shared implies --allow-shlib-undefined. Currently
+ // ---allow-shlib-undefined controls warnings issued based on the
+ // -symbol table. --unresolved-symbols controls warnings issued
+ // -based on relocations.
+ if (this->shared() && !this->user_set_allow_shlib_undefined())
+ this->set_allow_shlib_undefined(true);
+
+ // Normalize library_path() by adding the sysroot to all directories
+ // in the path, as appropriate.
+ this->add_sysroot();
+
+ // Now that we've normalized the options, check for contradictory ones.
+ if (this->shared() && this->is_static())
+ gold_fatal(_("-shared and -static are incompatible"));
+ if (this->shared() && this->pie())
+ gold_fatal(_("-shared and -pie are incompatible"));
+ if (this->pie() && this->is_static())
+ gold_fatal(_("-pie and -static are incompatible"));
+
+ if (this->shared() && this->relocatable())
+ gold_fatal(_("-shared and -r are incompatible"));
+ if (this->pie() && this->relocatable())
+ gold_fatal(_("-pie and -r are incompatible"));
+
+ if (!this->shared())
{
- this->sysroot_ = get_default_sysroot();
- if (this->sysroot_.empty())
- return;
+ if (this->filter() != NULL)
+ gold_fatal(_("-F/--filter may not used without -shared"));
+ if (this->any_auxiliary())
+ gold_fatal(_("-f/--auxiliary may not be used without -shared"));
}
- const char* sysroot = this->sysroot_.c_str();
- char* canonical_sysroot = lrealpath(sysroot);
+ // TODO: implement support for -retain-symbols-file with -r, if needed.
+ if (this->relocatable() && this->retain_symbols_file())
+ gold_fatal(_("-retain-symbols-file does not yet work with -r"));
+
+ if (this->oformat_enum() != General_options::OBJECT_FORMAT_ELF
+ && (this->shared()
+ || this->pie()
+ || this->relocatable()))
+ gold_fatal(_("binary output format not compatible "
+ "with -shared or -pie or -r"));
+
+ if (this->user_set_hash_bucket_empty_fraction()
+ && (this->hash_bucket_empty_fraction() < 0.0
+ || this->hash_bucket_empty_fraction() >= 1.0))
+ gold_fatal(_("--hash-bucket-empty-fraction value %g out of range "
+ "[0.0, 1.0)"),
+ this->hash_bucket_empty_fraction());
+
+ if (this->implicit_incremental_ && this->incremental_mode_ == INCREMENTAL_OFF)
+ gold_fatal(_("Options --incremental-changed, --incremental-unchanged, "
+ "--incremental-unknown require the use of --incremental"));
+
+ // Check for options that are not compatible with incremental linking.
+ // Where an option can be disabled without seriously changing the semantics
+ // of the link, we turn the option off; otherwise, we issue a fatal error.
+
+ if (this->incremental_mode_ != INCREMENTAL_OFF)
+ {
+ if (this->relocatable())
+ gold_fatal(_("incremental linking is not compatible with -r"));
+ if (this->emit_relocs())
+ gold_fatal(_("incremental linking is not compatible with "
+ "--emit-relocs"));
+ if (this->has_plugins())
+ gold_fatal(_("incremental linking is not compatible with --plugin"));
+ if (this->relro())
+ gold_fatal(_("incremental linking is not compatible with -z relro"));
+ if (this->pie())
+ gold_fatal(_("incremental linking is not compatible with -pie"));
+ if (this->gc_sections())
+ {
+ gold_warning(_("ignoring --gc-sections for an incremental link"));
+ this->set_gc_sections(false);
+ }
+ if (this->icf_enabled())
+ {
+ gold_warning(_("ignoring --icf for an incremental link"));
+ this->set_icf_status(ICF_NONE);
+ }
+ if (strcmp(this->compress_debug_sections(), "none") != 0)
+ {
+ gold_warning(_("ignoring --compress-debug-sections for an "
+ "incremental link"));
+ this->set_compress_debug_sections("none");
+ }
+ }
- for (Dir_list::iterator p = this->search_path_.begin();
- p != this->search_path_.end();
- ++p)
- p->add_sysroot(sysroot, canonical_sysroot);
+ // --rosegment-gap implies --rosegment.
+ if (this->user_set_rosegment_gap())
+ this->set_rosegment(true);
- free(canonical_sysroot);
+ // FIXME: we can/should be doing a lot more sanity checking here.
}
// Search_directory methods.
// Add a file to the list.
-void
-Input_arguments::add_file(const Input_file_argument& file)
+Input_argument&
+Input_arguments::add_file(Input_file_argument& file)
{
- if (!this->in_group_)
- this->input_argument_list_.push_back(Input_argument(file));
- else
+ file.set_arg_serial(++this->file_count_);
+ if (this->in_group_)
{
gold_assert(!this->input_argument_list_.empty());
gold_assert(this->input_argument_list_.back().is_group());
- this->input_argument_list_.back().group()->add_file(file);
+ return this->input_argument_list_.back().group()->add_file(file);
+ }
+ if (this->in_lib_)
+ {
+ gold_assert(!this->input_argument_list_.empty());
+ gold_assert(this->input_argument_list_.back().is_lib());
+ return this->input_argument_list_.back().lib()->add_file(file);
}
+ this->input_argument_list_.push_back(Input_argument(file));
+ return this->input_argument_list_.back();
}
// Start a group.
void
Input_arguments::start_group()
{
- gold_assert(!this->in_group_);
+ if (this->in_group_)
+ gold_fatal(_("May not nest groups"));
+ if (this->in_lib_)
+ gold_fatal(_("may not nest groups in libraries"));
Input_file_group* group = new Input_file_group();
this->input_argument_list_.push_back(Input_argument(group));
this->in_group_ = true;
void
Input_arguments::end_group()
{
- gold_assert(this->in_group_);
+ if (!this->in_group_)
+ gold_fatal(_("Group end without group start"));
this->in_group_ = false;
}
+// Start a lib.
+
+void
+Input_arguments::start_lib(const Position_dependent_options& options)
+{
+ if (this->in_lib_)
+ gold_fatal(_("may not nest libraries"));
+ if (this->in_group_)
+ gold_fatal(_("may not nest libraries in groups"));
+ Input_file_lib* lib = new Input_file_lib(options);
+ this->input_argument_list_.push_back(Input_argument(lib));
+ this->in_lib_ = true;
+}
+
+// End a lib.
+
+void
+Input_arguments::end_lib()
+{
+ if (!this->in_lib_)
+ gold_fatal(_("lib end without lib start"));
+ this->in_lib_ = false;
+}
+
// Command_line options.
Command_line::Command_line()
- : options_(), position_options_(), inputs_()
{
}
-// Process the command line options. For process_one_option,
-// i is the index of argv to process next, and the return value
-// is the index of the next option to process (i+1 or i+2, or argc
-// to indicate processing is done). no_more_options is set to true
-// if (and when) "--" is seen as an option.
+// Pre_options is the hook that sets the ready_to_register flag.
+
+Command_line::Pre_options::Pre_options()
+{
+ gold::options::ready_to_register = true;
+}
+
+// Process the command line options. For process_one_option, i is the
+// index of argv to process next, and must be an option (that is,
+// start with a dash). The return value is the index of the next
+// option to process (i+1 or i+2, or argc to indicate processing is
+// done). no_more_options is set to true if (and when) "--" is seen
+// as an option.
int
-Command_line::process_one_option(int argc, char** argv, int i,
- bool* no_more_options)
+Command_line::process_one_option(int argc, const char** argv, int i,
+ bool* no_more_options)
{
- const int options_size = options::Command_line_options::options_size;
- const options::One_option* options = options::Command_line_options::options;
- gold_assert(i < argc);
+ gold_assert(argv[i][0] == '-' && !(*no_more_options));
- if (argv[i][0] != '-' || *no_more_options)
+ // If we are reading "--", then just set no_more_options and return.
+ if (argv[i][1] == '-' && argv[i][2] == '\0')
{
- this->add_file(argv[i], false);
+ *no_more_options = true;
return i + 1;
}
- // Option starting with '-'.
- int dashes = 1;
- if (argv[i][1] == '-')
- {
- dashes = 2;
- if (argv[i][2] == '\0')
- {
- *no_more_options = true;
- return i + 1;
- }
- }
+ int new_i = i;
+ options::One_option* option = NULL;
+ const char* arg = NULL;
- // Look for a long option match.
- char* opt = argv[i] + dashes;
- char first = opt[0];
- int skiparg = 0;
- char* arg = strchr(opt, '=');
- bool argument_with_equals = arg != NULL;
- if (arg != NULL)
- {
- *arg = '\0';
- ++arg;
- }
- else if (i + 1 < argc)
+ // First, try to process argv as a long option.
+ option = parse_long_option(argc, argv, false, &arg, &new_i);
+ if (option)
{
- arg = argv[i + 1];
- skiparg = 1;
+ option->reader->parse_to_value(argv[i], arg, this, &this->options_);
+ return new_i;
}
- int j;
- for (j = 0; j < options_size; ++j)
- {
- if (options[j].long_option != NULL
- && (dashes == 2
- || (options[j].dash
- != options::One_option::EXACTLY_TWO_DASHES))
- && first == options[j].long_option[0]
- && strcmp(opt, options[j].long_option) == 0)
- {
- if (options[j].special)
- {
- // Restore the '=' we clobbered above.
- if (arg != NULL && skiparg == 0)
- arg[-1] = '=';
- i += options[j].special(argc - i, argv + i, opt, true, this);
- }
- else
- {
- if (!options[j].takes_argument())
- {
- if (argument_with_equals)
- this->usage(_("unexpected argument"), argv[i]);
- arg = NULL;
- skiparg = 0;
- }
- else
- {
- if (arg == NULL)
- this->usage(_("missing argument"), argv[i]);
- }
- this->apply_option(options[j], arg);
- i += skiparg + 1;
- }
- break;
- }
- }
- if (j < options_size)
- return i;
-
- // If we saw two dashes, we needed to have seen a long option.
- if (dashes == 2)
- this->usage(_("unknown option"), argv[i]);
-
- // Look for a short option match. There may be more than one
- // short option in a given argument.
- bool done = false;
- char* s = argv[i] + 1;
- ++i;
- while (*s != '\0' && !done)
+ // Now, try to process argv as a short option. Since several short
+ // options can be combined in one argv, we may have to parse a lot
+ // until we're done reading this argv.
+ int pos_in_argv_i = 1;
+ while (new_i == i)
{
- char opt = *s;
- int j;
- for (j = 0; j < options_size; ++j)
- {
- if (options[j].short_option == opt)
- {
- if (options[j].special)
- {
- // Undo the argument skip done above.
- --i;
- i += options[j].special(argc - i, argv + i, s, false,
- this);
- done = true;
- }
- else
- {
- arg = NULL;
- if (options[j].takes_argument())
- {
- if (s[1] != '\0')
- {
- arg = s + 1;
- done = true;
- }
- else if (i < argc)
- {
- arg = argv[i];
- ++i;
- }
- else
- this->usage(_("missing argument"), opt);
- }
- this->apply_option(options[j], arg);
- }
- break;
- }
- }
-
- if (j >= options_size)
- this->usage(_("unknown option"), *s);
-
- ++s;
+ option = parse_short_option(argc, argv, pos_in_argv_i, &arg, &new_i);
+ if (!option)
+ break;
+ option->reader->parse_to_value(argv[i], arg, this, &this->options_);
+ ++pos_in_argv_i;
}
- return i;
+ if (option)
+ return new_i;
+
+ // I guess it's neither a long option nor a short option.
+ usage(_("unknown option"), argv[i]);
+ return argc;
}
void
-Command_line::process(int argc, char** argv)
+Command_line::process(int argc, const char** argv)
{
bool no_more_options = false;
int i = 0;
while (i < argc)
- i = process_one_option(argc, argv, i, &no_more_options);
-
- if (this->inputs_.in_group())
- {
- fprintf(stderr, _("%s: missing group end\n"), program_name);
- this->usage();
- }
-
- // FIXME: We should only do this when configured in native mode.
- this->options_.add_to_search_path_with_sysroot("/lib");
- this->options_.add_to_search_path_with_sysroot("/usr/lib");
-
- this->options_.add_sysroot();
-
- // Ensure options don't contradict each other and are otherwise kosher.
- this->normalize_options();
-}
-
-// Extract an option argument for a special option. LONGNAME is the
-// long name of the option. This sets *PRET to the return value for
-// the special function handler to skip to the next option.
-
-const char*
-Command_line::get_special_argument(const char* longname, int argc, char** argv,
- const char* arg, bool long_option,
- int *pret)
-{
- if (long_option)
- {
- size_t longlen = strlen(longname);
- gold_assert(strncmp(arg, longname, longlen) == 0);
- arg += longlen;
- if (*arg == '=')
- {
- *pret = 1;
- return arg + 1;
- }
- else if (argc > 1)
- {
- gold_assert(*arg == '\0');
- *pret = 2;
- return argv[1];
- }
- }
- else
{
- if (arg[1] != '\0')
- {
- *pret = 1;
- return arg + 1;
- }
- else if (argc > 1)
+ this->position_options_.copy_from_options(this->options());
+ if (no_more_options || argv[i][0] != '-')
{
- *pret = 2;
- return argv[1];
+ Input_file_argument file(argv[i],
+ Input_file_argument::INPUT_FILE_TYPE_FILE,
+ "", false, this->position_options_);
+ this->inputs_.add_file(file);
+ ++i;
}
+ else
+ i = process_one_option(argc, argv, i, &no_more_options);
}
- this->usage(_("missing argument"), arg);
-}
-
-// Ensure options don't contradict each other and are otherwise kosher.
-
-void
-Command_line::normalize_options()
-{
- // If the user specifies both -s and -r, convert the -s as -S.
- // -r requires us to keep externally visible symbols!
- if (this->options_.strip_all() && this->options_.is_relocatable())
+ if (this->inputs_.in_group())
{
- // Clears the strip_all() status, replacing it with strip_debug().
- this->options_.set_strip_debug();
+ fprintf(stderr, _("%s: missing group end\n"), program_name);
+ usage();
}
- // FIXME: we can/should be doing a lot more sanity checking here.
-}
-
-
-// Apply a command line option.
-
-void
-Command_line::apply_option(const options::One_option& opt,
- const char* arg)
-{
- if (arg == NULL)
+ if (this->inputs_.in_lib())
{
- if (opt.general_noarg)
- (this->options_.*(opt.general_noarg))();
- else if (opt.dependent_noarg)
- (this->position_options_.*(opt.dependent_noarg))();
- else
- gold_unreachable();
- }
- else
- {
- if (opt.general_arg)
- (this->options_.*(opt.general_arg))(arg);
- else if (opt.dependent_arg)
- (this->position_options_.*(opt.dependent_arg))(arg);
- else
- gold_unreachable();
+ fprintf(stderr, _("%s: missing lib end\n"), program_name);
+ usage();
}
-}
-
-// Add an input file or library.
-
-void
-Command_line::add_file(const char* name, bool is_lib)
-{
- Input_file_argument file(name, is_lib, "", this->position_options_);
- this->inputs_.add_file(file);
-}
-
-// Handle the -l option, which requires special treatment.
-
-int
-Command_line::process_l_option(int argc, char** argv, char* arg,
- bool long_option)
-{
- int ret;
- const char* libname = this->get_special_argument("library", argc, argv, arg,
- long_option, &ret);
- this->add_file(libname, true);
- return ret;
-}
-
-// Handle the --start-group option.
-
-void
-Command_line::start_group(const char* arg)
-{
- if (this->inputs_.in_group())
- this->usage(_("may not nest groups"), arg);
- this->inputs_.start_group();
-}
-
-// Handle the --end-group option.
-
-void
-Command_line::end_group(const char* arg)
-{
- if (!this->inputs_.in_group())
- this->usage(_("group end without group start"), arg);
- this->inputs_.end_group();
-}
-
-// Report a usage error. */
-void
-Command_line::usage()
-{
- fprintf(stderr,
- _("%s: use the --help option for usage information\n"),
- program_name);
- ::exit(EXIT_FAILURE);
+ // Normalize the options and ensure they don't contradict each other.
+ this->options_.finalize();
}
-void
-Command_line::usage(const char* msg, const char *opt)
-{
- fprintf(stderr,
- _("%s: %s: %s\n"),
- program_name, opt, msg);
- this->usage();
-}
+// Finalize the version script options and return them.
-void
-Command_line::usage(const char* msg, char opt)
+const Version_script_info&
+Command_line::version_script()
{
- fprintf(stderr,
- _("%s: -%c: %s\n"),
- program_name, opt, msg);
- this->usage();
+ this->options_.finalize_dynamic_list();
+ Version_script_info* vsi = this->script_options_.version_script_info();
+ vsi->finalize();
+ return *vsi;
}
} // End namespace gold.
projects / deliverable / binutils-gdb.git / blobdiff