OpenE2K
/
binutils-gdb
12
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
binutils-gdb/gold/options.cc

1392 lines
39 KiB
C++
Raw Blame History

// options.c -- handle command line options for gold
// Copyright 2006, 2007, 2008, 2009, 2010 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 construction 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 these 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*)
{
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);
}
void
General_options::parse_defsym(const char*, const char* arg,
Command_line* cmdline)
{
cmdline->script_options().define_symbol(arg);
}
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_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);
}
// 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);
}
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)
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;
}
}
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;
}
} // 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_(EXECSTACK_FROM_INPUT),
icf_status_(ICF_NONE),
static_(false),
do_demangle_(false),
plugins_(NULL),
dynamic_list_(),
incremental_mode_(INCREMENTAL_OFF),
incremental_disposition_(INCREMENTAL_CHECK),
implicit_incremental_(false),
excluded_libs_(),
symbols_to_retain_(),
section_starts_(),
fix_v4bx_(FIX_V4BX_NONE),
endianness_(ENDIANNESS_NOT_SET)
{
// 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 if (!this->nostdlib())
{
// 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_mode_ == INCREMENTAL_OFF)
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_)
{
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);
}
else if (this->in_lib_)
{
gold_assert(!this->input_argument_list_.empty());
gold_assert(this->input_argument_list_.back().is_lib());
this->input_argument_list_.back().lib()->add_file(file);
}
else
this->input_argument_list_.push_back(Input_argument(file));
}
// Start a group.
void
Input_arguments::start_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;
}
// End a group.
void
Input_arguments::end_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()
{
}
// 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();
}
// Finalize the version script options and return them.
const Version_script_info&
Command_line::version_script()
{
this->options_.finalize_dynamic_list();
Version_script_info* vsi = this->script_options_.version_script_info();
vsi->finalize();
return *vsi;
}
} // End namespace gold.
Reference in New Issue View Git Blame Copy Permalink