X-Git-Url: https://oss.titaniummirror.com/gitweb?p=msp430-binutils.git;a=blobdiff_plain;f=gold%2Foptions.cc;fp=gold%2Foptions.cc;h=299a748048b03ea7cfd4481f0e38209ea9d56c5c;hp=0000000000000000000000000000000000000000;hb=d5da4f291af551c0b8b79e1d4a9b173d60e5c10e;hpb=7b5ea4fcdf2819e070665ab5610f8b48e3867c10

diff --git a/gold/options.cc b/gold/options.cc
new file mode 100644
index 0000000..299a748
--- /dev/null
+++ b/gold/options.cc
@@ -0,0 +1,1209 @@
+// options.c -- handle command line options for gold
+
+// Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+// Written by Ian Lance Taylor <iant@google.com>.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
+#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
+{
+
+General_options
+Position_dependent_options::default_options_;
+
+namespace options
+{
+
+// This flag is TRUE if we should register the command-line options as they
+// are constructed.  It is set after contruction of the options within
+// class Position_dependent_options.
+static bool ready_to_register = false;
+
+// This global variable is set up as General_options is constructed.
+static std::vector<const One_option*> registered_options;
+
+// 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 thes data structures.
+typedef Unordered_map<std::string, One_option*> Option_map;
+static Option_map* long_options = NULL;
+static One_option* short_options[128];
+
+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(' ');
+
+  // TODO: if we're boolean, add " (default)" when appropriate.
+  printf("%s\n", gettext(this->helpstring));
+}
+
+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");
+
+  // 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_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++)
+    {
+      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*)
+{
+  gold::print_version(opt[0] == '-' && opt[1] == 'v');
+  ::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);
+}
+
+void
+General_options::parse_defsym(const char*, const char* arg,
+                              Command_line* cmdline)
+{
+  cmdline->script_options().define_symbol(arg);
+}
+
+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_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);
+}
+
+#ifdef ENABLE_PLUGINS
+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);
+}
+#endif // ENABLE_PLUGINS
+
+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);
+}
+
+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);
+}
+
+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();
+}
+
+// The function add_excluded_libs() in ld/ldlang.c of GNU ld breaks up a list
+// of names seperated 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)
+    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;
+    }
+}
+
+} // 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;
+
+  // 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;
+    }
+
+  // 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);
+
+  // 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);
+    }
+
+  return retval;
+}
+
+// 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)
+{
+  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);
+  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];
+    }
+
+  if (retval == NULL)
+    return NULL;
+
+  // 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);
+    }
+
+  // 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);
+    }
+
+  return retval;
+}
+
+} // End anonymous namespace.
+
+namespace gold
+{
+
+General_options::General_options()
+  : printed_version_(false),
+    execstack_status_(General_options::EXECSTACK_FROM_INPUT), static_(false),
+    do_demangle_(false), plugins_(),
+    incremental_disposition_(INCREMENTAL_CHECK), implicit_incremental_(false)
+{
+  // Turn off option registration once construction is complete.
+  gold::options::ready_to_register = false;
+}
+
+General_options::Object_format
+General_options::format_enum() const
+{
+  return General_options::string_to_object_format(this->format());
+}
+
+General_options::Object_format
+General_options::oformat_enum() const
+{
+  return General_options::string_to_object_format(this->oformat());
+}
+
+// Add the sysroot, if any, to the search paths.
+
+void
+General_options::add_sysroot()
+{
+  if (this->sysroot() == NULL || this->sysroot()[0] == '\0')
+    {
+      this->set_sysroot(get_default_sysroot());
+      if (this->sysroot() == NULL || this->sysroot()[0] == '\0')
+        return;
+    }
+
+  char* canonical_sysroot = lrealpath(this->sysroot());
+
+  for (Dir_list::iterator p = this->library_path_.value.begin();
+       p != this->library_path_.value.end();
+       ++p)
+    p->add_sysroot(this->sysroot(), canonical_sysroot);
+
+  free(canonical_sysroot);
+}
+
+// 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;
+}
+
+// Add a plugin to the list of plugins.
+
+void
+General_options::add_plugin(const char* filename)
+{
+  if (this->plugins_ == NULL)
+    this->plugins_ = new Plugin_manager(*this);
+  this->plugins_->add_plugin(filename);
+}
+
+// Add a plugin option to a plugin.
+
+void
+General_options::add_plugin_option(const char* arg)
+{
+  if (this->plugins_ == NULL)
+    gold_fatal("--plugin-opt requires --plugin.");
+  this->plugins_->add_plugin_option(arg);
+}
+
+// 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.
+
+void
+General_options::finalize()
+{
+  // 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())
+    {
+      this->set_strip_all(false);
+      gold_assert(this->strip_debug());
+    }
+
+  // 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);
+
+  // Handle the optional argument for --demangle.
+  if (this->user_set_demangle())
+    {
+      this->set_do_demangle(true);
+      const char* style = this->demangle();
+      if (*style != '\0')
+	{
+	  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);
+    }
+
+  // -M is equivalent to "-Map -".
+  if (this->print_map() && !this->user_set_Map())
+    {
+      this->set_Map("-");
+      this->set_user_set_Map();
+    }
+
+  // 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
+
+  if (this->user_set_Y())
+    {
+      std::string s = this->Y();
+      if (s.compare(0, 2, "P,") == 0)
+	s.erase(0, 2);
+
+      size_t pos = 0;
+      size_t next_pos;
+      do
+	{
+	  next_pos = s.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(s.substr(pos, len).c_str());
+	  pos = next_pos + 1;
+	}
+      while (next_pos != std::string::npos);
+    }
+  else
+    {
+      // Even if they don't specify it, we add -L /lib and -L /usr/lib.
+      // FIXME: We should only do this when configured in native mode.
+      this->add_to_library_path_with_sysroot("/lib");
+      this->add_to_library_path_with_sysroot("/usr/lib");
+    }
+
+  // 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);
+        }
+    }
+
+  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->shared() && this->relocatable())
+    gold_fatal(_("-shared and -r are incompatible"));
+  if (this->pie() && this->relocatable())
+    gold_fatal(_("-pie and -r are incompatible"));
+
+  // 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())
+    gold_fatal(_("Options --incremental-changed, --incremental-unchanged, "
+                 "--incremental-unknown require the use of --incremental"));
+
+  // FIXME: we can/should be doing a lot more sanity checking here.
+}
+
+// Search_directory methods.
+
+// This is called if we have a sysroot.  Apply the sysroot if
+// appropriate.  Record whether the directory is in the sysroot.
+
+void
+Search_directory::add_sysroot(const char* sysroot,
+                              const char* canonical_sysroot)
+{
+  gold_assert(*sysroot != '\0');
+  if (this->put_in_sysroot_)
+    {
+      if (!IS_DIR_SEPARATOR(this->name_[0])
+          && !IS_DIR_SEPARATOR(sysroot[strlen(sysroot) - 1]))
+        this->name_ = '/' + this->name_;
+      this->name_ = sysroot + this->name_;
+      this->is_in_sysroot_ = true;
+    }
+  else
+    {
+      // Check whether this entry is in the sysroot.  To do this
+      // correctly, we need to use canonical names.  Otherwise we will
+      // get confused by the ../../.. paths that gcc tends to use.
+      char* canonical_name = lrealpath(this->name_.c_str());
+      int canonical_name_len = strlen(canonical_name);
+      int canonical_sysroot_len = strlen(canonical_sysroot);
+      if (canonical_name_len > canonical_sysroot_len
+          && IS_DIR_SEPARATOR(canonical_name[canonical_sysroot_len]))
+        {
+          canonical_name[canonical_sysroot_len] = '\0';
+          if (FILENAME_CMP(canonical_name, canonical_sysroot) == 0)
+            this->is_in_sysroot_ = true;
+        }
+      free(canonical_name);
+    }
+}
+
+// Input_arguments methods.
+
+// Add a file to the list.
+
+void
+Input_arguments::add_file(const Input_file_argument& file)
+{
+  if (!this->in_group_)
+    this->input_argument_list_.push_back(Input_argument(file));
+  else
+    {
+      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);
+    }
+}
+
+// Start a group.
+
+void
+Input_arguments::start_group()
+{
+  if (this->in_group_)
+    gold_fatal(_("May not nest groups"));
+  Input_file_group* group = new Input_file_group();
+  this->input_argument_list_.push_back(Input_argument(group));
+  this->in_group_ = true;
+}
+
+// End a group.
+
+void
+Input_arguments::end_group()
+{
+  if (!this->in_group_)
+    gold_fatal(_("Group end without group start"));
+  this->in_group_ = false;
+}
+
+// Command_line options.
+
+Command_line::Command_line()
+{
+}
+
+// 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, const char** argv, int i,
+                                 bool* no_more_options)
+{
+  gold_assert(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')
+    {
+      *no_more_options = true;
+      return i + 1;
+    }
+
+  int new_i = i;
+  options::One_option* option = NULL;
+  const char* arg = NULL;
+
+  // First, try to process argv as a long option.
+  option = parse_long_option(argc, argv, false, &arg, &new_i);
+  if (option)
+    {
+      option->reader->parse_to_value(argv[i], arg, this, &this->options_);
+      return new_i;
+    }
+
+  // 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)
+    {
+      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;
+    }
+  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, const char** argv)
+{
+  bool no_more_options = false;
+  int i = 0;
+  while (i < argc)
+    {
+      this->position_options_.copy_from_options(this->options());
+      if (no_more_options || argv[i][0] != '-')
+        {
+	  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);
+    }
+
+  if (this->inputs_.in_group())
+    {
+      fprintf(stderr, _("%s: missing group end\n"), program_name);
+      usage();
+    }
+
+  // Normalize the options and ensure they don't contradict each other.
+  this->options_.finalize();
+}
+
+} // End namespace gold.