// options.h -- handle command line options for gold -*- C++ -*-
-// Copyright 2006, 2007 Free Software Foundation, Inc.
+// Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
// MA 02110-1301, USA.
-// Command_line
-// Holds everything we get from the command line.
// General_options (from Command_line::options())
-// Options which are not position dependent.
+// All the options (a.k.a. command-line flags)
// Input_argument (from Command_line::inputs())
// The list of input files, including -l options.
-// Position_dependent_options (from Input_argument::options())
-// Position dependent options which apply to this argument.
+// Command_line
+// Everything we get from the command line -- the General_options
+// plus the Input_arguments.
+//
+// There are also some smaller classes, such as
+// Position_dependent_options which hold a subset of General_options
+// that change as options are parsed (as opposed to the usual behavior
+// of the last instance of that option specified on the commandline wins).
#ifndef GOLD_OPTIONS_H
#define GOLD_OPTIONS_H
#include <cstdlib>
+#include <cstring>
#include <list>
#include <string>
#include <vector>
+#include "elfcpp.h"
#include "script.h"
namespace gold
{
class Command_line;
+class General_options;
+class Search_directory;
class Input_file_group;
class Position_dependent_options;
+class Target;
+class Plugin_manager;
+
+// Incremental build action for a specific file, as selected by the user.
+
+enum Incremental_disposition
+{
+ // Determine the status from the timestamp (default).
+ INCREMENTAL_CHECK,
+ // Assume the file changed from the previous build.
+ INCREMENTAL_CHANGED,
+ // Assume the file didn't change from the previous build.
+ INCREMENTAL_UNCHANGED
+};
+
+// The nested namespace is to contain all the global variables and
+// structs that need to be defined in the .h file, but do not need to
+// be used outside this class.
+namespace options
+{
+typedef std::vector<Search_directory> Dir_list;
+typedef Unordered_set<std::string> String_set;
+
+// These routines convert from a string option to various types.
+// Each gives a fatal error if it cannot parse the argument.
+
+extern void
+parse_bool(const char* option_name, const char* arg, bool* retval);
+
+extern void
+parse_int(const char* option_name, const char* arg, int* retval);
+
+extern void
+parse_uint(const char* option_name, const char* arg, int* retval);
+
+extern void
+parse_uint64(const char* option_name, const char* arg, uint64_t* retval);
+
+extern void
+parse_double(const char* option_name, const char* arg, double* retval);
+
+extern void
+parse_string(const char* option_name, const char* arg, const char** retval);
-namespace options {
+extern void
+parse_optional_string(const char* option_name, const char* arg,
+ const char** retval);
-class Command_line_options;
-struct One_option;
-struct One_z_option;
+extern void
+parse_dirlist(const char* option_name, const char* arg, Dir_list* retval);
-} // End namespace gold::options.
+extern void
+parse_set(const char* option_name, const char* arg, String_set* retval);
+
+extern void
+parse_choices(const char* option_name, const char* arg, const char** retval,
+ const char* choices[], int num_choices);
+
+struct Struct_var;
+
+// Most options have both a shortname (one letter) and a longname.
+// This enum controls how many dashes are expected for longname access
+// -- shortnames always use one dash. Most longnames will accept
+// either one dash or two; the only difference between ONE_DASH and
+// TWO_DASHES is how we print the option in --help. However, some
+// longnames require two dashes, and some require only one. The
+// special value DASH_Z means that the option is preceded by "-z".
+enum Dashes
+{
+ ONE_DASH, TWO_DASHES, EXACTLY_ONE_DASH, EXACTLY_TWO_DASHES, DASH_Z
+};
+
+// LONGNAME is the long-name of the option with dashes converted to
+// underscores, or else the short-name if the option has no long-name.
+// It is never the empty string.
+// DASHES is an instance of the Dashes enum: ONE_DASH, TWO_DASHES, etc.
+// SHORTNAME is the short-name of the option, as a char, or '\0' if the
+// option has no short-name. If the option has no long-name, you
+// should specify the short-name in *both* VARNAME and here.
+// DEFAULT_VALUE is the value of the option if not specified on the
+// commandline, as a string.
+// HELPSTRING is the descriptive text used with the option via --help
+// HELPARG is how you define the argument to the option.
+// --help output is "-shortname HELPARG, --longname HELPARG: HELPSTRING"
+// HELPARG should be NULL iff the option is a bool and takes no arg.
+// OPTIONAL_ARG is true if this option takes an optional argument. An
+// optional argument must be specifid as --OPTION=VALUE, not
+// --OPTION VALUE.
+// READER provides parse_to_value, which is a function that will convert
+// a char* argument into the proper type and store it in some variable.
+// A One_option struct initializes itself with the global list of options
+// at constructor time, so be careful making one of these.
+struct One_option
+{
+ std::string longname;
+ Dashes dashes;
+ char shortname;
+ const char* default_value;
+ const char* helpstring;
+ const char* helparg;
+ bool optional_arg;
+ Struct_var* reader;
+
+ One_option(const char* ln, Dashes d, char sn, const char* dv,
+ const char* hs, const char* ha, bool oa, Struct_var* r)
+ : longname(ln), dashes(d), shortname(sn), default_value(dv ? dv : ""),
+ helpstring(hs), helparg(ha), optional_arg(oa), reader(r)
+ {
+ // In longname, we convert all underscores to dashes, since GNU
+ // style uses dashes in option names. longname is likely to have
+ // underscores in it because it's also used to declare a C++
+ // function.
+ const char* pos = strchr(this->longname.c_str(), '_');
+ for (; pos; pos = strchr(pos, '_'))
+ this->longname[pos - this->longname.c_str()] = '-';
+
+ // We only register ourselves if our helpstring is not NULL. This
+ // is to support the "no-VAR" boolean variables, which we
+ // conditionally turn on by defining "no-VAR" help text.
+ if (this->helpstring)
+ this->register_option();
+ }
+
+ // This option takes an argument iff helparg is not NULL.
+ bool
+ takes_argument() const
+ { return this->helparg != NULL; }
+
+ // Whether the argument is optional.
+ bool
+ takes_optional_argument() const
+ { return this->optional_arg; }
+
+ // Register this option with the global list of options.
+ void
+ register_option();
+
+ // Print this option to stdout (used with --help).
+ void
+ print() const;
+};
+
+// All options have a Struct_##varname that inherits from this and
+// actually implements parse_to_value for that option.
+struct Struct_var
+{
+ // OPTION: the name of the option as specified on the commandline,
+ // including leading dashes, and any text following the option:
+ // "-O", "--defsym=mysym=0x1000", etc.
+ // ARG: the arg associated with this option, or NULL if the option
+ // takes no argument: "2", "mysym=0x1000", etc.
+ // CMDLINE: the global Command_line object. Used by DEFINE_special.
+ // OPTIONS: the global General_options object. Used by DEFINE_special.
+ virtual void
+ parse_to_value(const char* option, const char* arg,
+ Command_line* cmdline, General_options* options) = 0;
+ virtual
+ ~Struct_var() // To make gcc happy.
+ { }
+};
+
+// This is for "special" options that aren't of any predefined type.
+struct Struct_special : public Struct_var
+{
+ // If you change this, change the parse-fn in DEFINE_special as well.
+ typedef void (General_options::*Parse_function)(const char*, const char*,
+ Command_line*);
+ Struct_special(const char* varname, Dashes dashes, char shortname,
+ Parse_function parse_function,
+ const char* helpstring, const char* helparg)
+ : option(varname, dashes, shortname, "", helpstring, helparg, false, this),
+ parse(parse_function)
+ { }
+
+ void parse_to_value(const char* option, const char* arg,
+ Command_line* cmdline, General_options* options)
+ { (options->*(this->parse))(option, arg, cmdline); }
+
+ One_option option;
+ Parse_function parse;
+};
+
+} // End namespace options.
+
+
+// These are helper macros use by DEFINE_uint64/etc below.
+// This macro is used inside the General_options_ class, so defines
+// var() and set_var() as General_options methods. Arguments as are
+// for the constructor for One_option. param_type__ is the same as
+// type__ for built-in types, and "const type__ &" otherwise.
+#define DEFINE_var(varname__, dashes__, shortname__, default_value__, \
+ default_value_as_string__, helpstring__, helparg__, \
+ optional_arg__, type__, param_type__, parse_fn__) \
+ public: \
+ param_type__ \
+ varname__() const \
+ { return this->varname__##_.value; } \
+ \
+ bool \
+ user_set_##varname__() const \
+ { return this->varname__##_.user_set_via_option; } \
+ \
+ void \
+ set_user_set_##varname__() \
+ { this->varname__##_.user_set_via_option = true; } \
+ \
+ private: \
+ struct Struct_##varname__ : public options::Struct_var \
+ { \
+ Struct_##varname__() \
+ : option(#varname__, dashes__, shortname__, default_value_as_string__, \
+ helpstring__, helparg__, optional_arg__, this), \
+ user_set_via_option(false), value(default_value__) \
+ { } \
+ \
+ void \
+ parse_to_value(const char* option_name, const char* arg, \
+ Command_line*, General_options*) \
+ { \
+ parse_fn__(option_name, arg, &this->value); \
+ this->user_set_via_option = true; \
+ } \
+ \
+ options::One_option option; \
+ bool user_set_via_option; \
+ type__ value; \
+ }; \
+ Struct_##varname__ varname__##_; \
+ void \
+ set_##varname__(param_type__ value) \
+ { this->varname__##_.value = value; }
+
+// These macros allow for easy addition of a new commandline option.
+
+// If no_helpstring__ is not NULL, then in addition to creating
+// VARNAME, we also create an option called no-VARNAME (or, for a -z
+// option, noVARNAME).
+#define DEFINE_bool(varname__, dashes__, shortname__, default_value__, \
+ helpstring__, no_helpstring__) \
+ DEFINE_var(varname__, dashes__, shortname__, default_value__, \
+ default_value__ ? "true" : "false", helpstring__, NULL, \
+ false, bool, bool, options::parse_bool) \
+ struct Struct_no_##varname__ : public options::Struct_var \
+ { \
+ Struct_no_##varname__() : option((dashes__ == options::DASH_Z \
+ ? "no" #varname__ \
+ : "no-" #varname__), \
+ dashes__, '\0', \
+ default_value__ ? "false" : "true", \
+ no_helpstring__, NULL, false, this) \
+ { } \
+ \
+ void \
+ parse_to_value(const char*, const char*, \
+ Command_line*, General_options* options) \
+ { options->set_##varname__(false); } \
+ \
+ options::One_option option; \
+ }; \
+ Struct_no_##varname__ no_##varname__##_initializer_
+
+#define DEFINE_enable(varname__, dashes__, shortname__, default_value__, \
+ helpstring__, no_helpstring__) \
+ DEFINE_var(enable_##varname__, dashes__, shortname__, default_value__, \
+ default_value__ ? "true" : "false", helpstring__, NULL, \
+ false, bool, bool, options::parse_bool) \
+ struct Struct_disable_##varname__ : public options::Struct_var \
+ { \
+ Struct_disable_##varname__() : option("disable-" #varname__, \
+ dashes__, '\0', \
+ default_value__ ? "false" : "true", \
+ no_helpstring__, NULL, false, this) \
+ { } \
+ \
+ void \
+ parse_to_value(const char*, const char*, \
+ Command_line*, General_options* options) \
+ { options->set_enable_##varname__(false); } \
+ \
+ options::One_option option; \
+ }; \
+ Struct_disable_##varname__ disable_##varname__##_initializer_
+
+#define DEFINE_int(varname__, dashes__, shortname__, default_value__, \
+ helpstring__, helparg__) \
+ DEFINE_var(varname__, dashes__, shortname__, default_value__, \
+ #default_value__, helpstring__, helparg__, false, \
+ int, int, options::parse_int)
+
+#define DEFINE_uint(varname__, dashes__, shortname__, default_value__, \
+ helpstring__, helparg__) \
+ DEFINE_var(varname__, dashes__, shortname__, default_value__, \
+ #default_value__, helpstring__, helparg__, false, \
+ int, int, options::parse_uint)
+
+#define DEFINE_uint64(varname__, dashes__, shortname__, default_value__, \
+ helpstring__, helparg__) \
+ DEFINE_var(varname__, dashes__, shortname__, default_value__, \
+ #default_value__, helpstring__, helparg__, false, \
+ uint64_t, uint64_t, options::parse_uint64)
+
+#define DEFINE_double(varname__, dashes__, shortname__, default_value__, \
+ helpstring__, helparg__) \
+ DEFINE_var(varname__, dashes__, shortname__, default_value__, \
+ #default_value__, helpstring__, helparg__, false, \
+ double, double, options::parse_double)
+
+#define DEFINE_string(varname__, dashes__, shortname__, default_value__, \
+ helpstring__, helparg__) \
+ DEFINE_var(varname__, dashes__, shortname__, default_value__, \
+ default_value__, helpstring__, helparg__, false, \
+ const char*, const char*, options::parse_string)
+
+// This is like DEFINE_string, but we convert each occurrence to a
+// Search_directory and store it in a vector. Thus we also have the
+// add_to_VARNAME() method, to append to the vector.
+#define DEFINE_dirlist(varname__, dashes__, shortname__, \
+ helpstring__, helparg__) \
+ DEFINE_var(varname__, dashes__, shortname__, , \
+ "", helpstring__, helparg__, false, options::Dir_list, \
+ const options::Dir_list&, options::parse_dirlist) \
+ void \
+ add_to_##varname__(const char* new_value) \
+ { options::parse_dirlist(NULL, new_value, &this->varname__##_.value); } \
+ void \
+ add_search_directory_to_##varname__(const Search_directory& dir) \
+ { this->varname__##_.value.push_back(dir); }
+
+// This is like DEFINE_string, but we store a set of strings.
+#define DEFINE_set(varname__, dashes__, shortname__, \
+ helpstring__, helparg__) \
+ DEFINE_var(varname__, dashes__, shortname__, , \
+ "", helpstring__, helparg__, false, options::String_set, \
+ const options::String_set&, options::parse_set) \
+ public: \
+ bool \
+ any_##varname__() const \
+ { return !this->varname__##_.value.empty(); } \
+ \
+ bool \
+ is_##varname__(const char* symbol) const \
+ { \
+ return (!this->varname__##_.value.empty() \
+ && (this->varname__##_.value.find(std::string(symbol)) \
+ != this->varname__##_.value.end())); \
+ } \
+ \
+ options::String_set::const_iterator \
+ varname__##_begin() const \
+ { return this->varname__##_.value.begin(); } \
+ \
+ options::String_set::const_iterator \
+ varname__##_end() const \
+ { return this->varname__##_.value.end(); }
+
+// When you have a list of possible values (expressed as string)
+// After helparg__ should come an initializer list, like
+// {"foo", "bar", "baz"}
+#define DEFINE_enum(varname__, dashes__, shortname__, default_value__, \
+ helpstring__, helparg__, ...) \
+ DEFINE_var(varname__, dashes__, shortname__, default_value__, \
+ default_value__, helpstring__, helparg__, false, \
+ const char*, const char*, parse_choices_##varname__) \
+ private: \
+ static void parse_choices_##varname__(const char* option_name, \
+ const char* arg, \
+ const char** retval) { \
+ const char* choices[] = __VA_ARGS__; \
+ options::parse_choices(option_name, arg, retval, \
+ choices, sizeof(choices) / sizeof(*choices)); \
+ }
+
+// This is like DEFINE_bool, but VARNAME is the name of a different
+// option. This option becomes an alias for that one. INVERT is true
+// if this option is an inversion of the other one.
+#define DEFINE_bool_alias(option__, varname__, dashes__, shortname__, \
+ helpstring__, no_helpstring__, invert__) \
+ private: \
+ struct Struct_##option__ : public options::Struct_var \
+ { \
+ Struct_##option__() \
+ : option(#option__, dashes__, shortname__, "", helpstring__, \
+ NULL, false, this) \
+ { } \
+ \
+ void \
+ parse_to_value(const char*, const char*, \
+ Command_line*, General_options* options) \
+ { \
+ options->set_##varname__(!invert__); \
+ options->set_user_set_##varname__(); \
+ } \
+ \
+ options::One_option option; \
+ }; \
+ Struct_##option__ option__##_; \
+ \
+ struct Struct_no_##option__ : public options::Struct_var \
+ { \
+ Struct_no_##option__() \
+ : option((dashes__ == options::DASH_Z \
+ ? "no" #option__ \
+ : "no-" #option__), \
+ dashes__, '\0', "", no_helpstring__, \
+ NULL, false, this) \
+ { } \
+ \
+ void \
+ parse_to_value(const char*, const char*, \
+ Command_line*, General_options* options) \
+ { \
+ options->set_##varname__(invert__); \
+ options->set_user_set_##varname__(); \
+ } \
+ \
+ options::One_option option; \
+ }; \
+ Struct_no_##option__ no_##option__##_initializer_
+
+// This is used for non-standard flags. It defines no functions; it
+// just calls General_options::parse_VARNAME whenever the flag is
+// seen. We declare parse_VARNAME as a static member of
+// General_options; you are responsible for defining it there.
+// helparg__ should be NULL iff this special-option is a boolean.
+#define DEFINE_special(varname__, dashes__, shortname__, \
+ helpstring__, helparg__) \
+ private: \
+ void parse_##varname__(const char* option, const char* arg, \
+ Command_line* inputs); \
+ struct Struct_##varname__ : public options::Struct_special \
+ { \
+ Struct_##varname__() \
+ : options::Struct_special(#varname__, dashes__, shortname__, \
+ &General_options::parse_##varname__, \
+ helpstring__, helparg__) \
+ { } \
+ }; \
+ Struct_##varname__ varname__##_initializer_
+
+// An option that takes an optional string argument. If the option is
+// used with no argument, the value will be the default, and
+// user_set_via_option will be true.
+#define DEFINE_optional_string(varname__, dashes__, shortname__, \
+ default_value__, \
+ helpstring__, helparg__) \
+ DEFINE_var(varname__, dashes__, shortname__, default_value__, \
+ default_value__, helpstring__, helparg__, true, \
+ const char*, const char*, options::parse_optional_string)
// A directory to search. For each directory we record whether it is
// in the sysroot. We need to know this so that, if a linker script
// This is the usual constructor.
Search_directory(const char* name, bool put_in_sysroot)
: name_(name), put_in_sysroot_(put_in_sysroot), is_in_sysroot_(false)
- { gold_assert(!this->name_.empty()); }
+ {
+ if (this->name_.empty())
+ this->name_ = ".";
+ }
// This is called if we have a sysroot. The sysroot is prefixed to
// any entries for which put_in_sysroot_ is true. is_in_sysroot_ is
is_in_sysroot() const
{ return this->is_in_sysroot_; }
+ // Return whether this is considered a system directory.
+ bool
+ is_system_directory() const
+ { return this->put_in_sysroot_ || this->is_in_sysroot_; }
+
private:
+ // The directory name.
std::string name_;
+ // True if the sysroot should be added as a prefix for this
+ // directory (if there is a sysroot). This is true for system
+ // directories that we search by default.
bool put_in_sysroot_;
+ // True if this directory is in the sysroot (if there is a sysroot).
+ // This is true if there is a sysroot and either 1) put_in_sysroot_
+ // is true, or 2) the directory happens to be in the sysroot based
+ // on a pathname comparison.
bool is_in_sysroot_;
};
-// The position independent options which apply to the whole link.
-// There are a lot of them.
-
class General_options
{
- public:
- General_options();
+ private:
+ // NOTE: For every option that you add here, also consider if you
+ // should add it to Position_dependent_options.
+ DEFINE_special(help, options::TWO_DASHES, '\0',
+ N_("Report usage information"), NULL);
+ DEFINE_special(version, options::TWO_DASHES, 'v',
+ N_("Report version information"), NULL);
+ DEFINE_special(V, options::EXACTLY_ONE_DASH, '\0',
+ N_("Report version and target information"), NULL);
+
+ // These options are sorted approximately so that for each letter in
+ // the alphabet, we show the option whose shortname is that letter
+ // (if any) and then every longname that starts with that letter (in
+ // alphabetical order). For both, lowercase sorts before uppercase.
+ // The -z options come last.
+
+ DEFINE_bool(allow_shlib_undefined, options::TWO_DASHES, '\0', false,
+ N_("Allow unresolved references in shared libraries"),
+ N_("Do not allow unresolved references in shared libraries"));
+
+ DEFINE_bool(as_needed, options::TWO_DASHES, '\0', false,
+ N_("Only set DT_NEEDED for dynamic libs if used"),
+ N_("Always DT_NEEDED for dynamic libs"));
+
+ DEFINE_enum(assert, options::ONE_DASH, '\0', NULL,
+ N_("Ignored"), N_("[ignored]"),
+ {"definitions", "nodefinitions", "nosymbolic", "pure-text"});
+
+ // This should really be an "enum", but it's too easy for folks to
+ // forget to update the list as they add new targets. So we just
+ // accept any string. We'll fail later (when the string is parsed),
+ // if the target isn't actually supported.
+ DEFINE_string(format, options::TWO_DASHES, 'b', "elf",
+ N_("Set input format"), ("[elf,binary]"));
+
+ DEFINE_bool(Bdynamic, options::ONE_DASH, '\0', true,
+ N_("-l searches for shared libraries"), NULL);
+ DEFINE_bool_alias(Bstatic, Bdynamic, options::ONE_DASH, '\0',
+ N_("-l does not search for shared libraries"), NULL,
+ true);
+
+ DEFINE_bool(Bsymbolic, options::ONE_DASH, '\0', false,
+ N_("Bind defined symbols locally"), NULL);
+
+ DEFINE_bool(Bsymbolic_functions, options::ONE_DASH, '\0', false,
+ N_("Bind defined function symbols locally"), NULL);
+
+ DEFINE_optional_string(build_id, options::TWO_DASHES, '\0', "sha1",
+ N_("Generate build ID note"),
+ N_("[=STYLE]"));
+
+ DEFINE_bool(check_sections, options::TWO_DASHES, '\0', true,
+ N_("Check segment addresses for overlaps (default)"),
+ N_("Do not check segment addresses for overlaps"));
+
+#ifdef HAVE_ZLIB_H
+ DEFINE_enum(compress_debug_sections, options::TWO_DASHES, '\0', "none",
+ N_("Compress .debug_* sections in the output file"),
+ ("[none,zlib]"),
+ {"none", "zlib"});
+#else
+ DEFINE_enum(compress_debug_sections, options::TWO_DASHES, '\0', "none",
+ N_("Compress .debug_* sections in the output file"),
+ N_("[none]"),
+ {"none"});
+#endif
+
+ DEFINE_bool(define_common, options::TWO_DASHES, 'd', false,
+ N_("Define common symbols"),
+ N_("Do not define common symbols"));
+ DEFINE_bool(dc, options::ONE_DASH, '\0', false,
+ N_("Alias for -d"), NULL);
+ DEFINE_bool(dp, options::ONE_DASH, '\0', false,
+ N_("Alias for -d"), NULL);
+
+ DEFINE_string(debug, options::TWO_DASHES, '\0', "",
+ N_("Turn on debugging"),
+ N_("[all,files,script,task][,...]"));
+
+ DEFINE_special(defsym, options::TWO_DASHES, '\0',
+ N_("Define a symbol"), N_("SYMBOL=EXPRESSION"));
+
+ DEFINE_optional_string(demangle, options::TWO_DASHES, '\0', NULL,
+ N_("Demangle C++ symbols in log messages"),
+ N_("[=STYLE]"));
+
+ DEFINE_bool(no_demangle, options::TWO_DASHES, '\0', false,
+ N_("Do not demangle C++ symbols in log messages"),
+ NULL);
+
+ DEFINE_bool(detect_odr_violations, options::TWO_DASHES, '\0', false,
+ N_("Try to detect violations of the One Definition Rule"),
+ NULL);
+
+ DEFINE_bool(discard_all, options::TWO_DASHES, 'x', false,
+ N_("Delete all local symbols"), NULL);
+ DEFINE_bool(discard_locals, options::TWO_DASHES, 'X', false,
+ N_("Delete all temporary local symbols"), NULL);
+
+ DEFINE_bool(dynamic_list_data, options::TWO_DASHES, '\0', false,
+ N_("Add data symbols to dynamic symbols"), NULL);
+
+ DEFINE_bool(dynamic_list_cpp_new, options::TWO_DASHES, '\0', false,
+ N_("Add C++ operator new/delete to dynamic symbols"), NULL);
+
+ DEFINE_bool(dynamic_list_cpp_typeinfo, options::TWO_DASHES, '\0', false,
+ N_("Add C++ typeinfo to dynamic symbols"), NULL);
- // -E: export dynamic symbols.
- bool
- export_dynamic() const
- { return this->export_dynamic_; }
+ DEFINE_special(dynamic_list, options::TWO_DASHES, '\0',
+ N_("Read a list of dynamic symbols"), N_("FILE"));
- // -I: dynamic linker name.
- const char*
- dynamic_linker() const
- { return this->dynamic_linker_; }
+ DEFINE_string(entry, options::TWO_DASHES, 'e', NULL,
+ N_("Set program start address"), N_("ADDRESS"));
- // -L: Library search path.
- typedef std::vector<Search_directory> Dir_list;
+ DEFINE_special(exclude_libs, options::TWO_DASHES, '\0',
+ N_("Exclude libraries from automatic export"),
+ N_(("lib,lib ...")));
- const Dir_list&
- search_path() const
- { return this->search_path_; }
+ DEFINE_bool(export_dynamic, options::TWO_DASHES, 'E', false,
+ N_("Export all dynamic symbols"),
+ N_("Do not export all dynamic symbols (default)"));
- // -O: optimization level (0: don't try to optimize output size).
- int
- optimization_level() const
- { return this->optimization_level_; }
+ DEFINE_bool(eh_frame_hdr, options::TWO_DASHES, '\0', false,
+ N_("Create exception frame header"), NULL);
- // -o: Output file name.
- const char*
- output_file_name() const
- { return this->output_file_name_; }
+ DEFINE_bool(fatal_warnings, options::TWO_DASHES, '\0', false,
+ N_("Treat warnings as errors"),
+ N_("Do not treat warnings as errors"));
+
+ DEFINE_string(fini, options::ONE_DASH, '\0', "_fini",
+ N_("Call SYMBOL at unload-time"), N_("SYMBOL"));
- // -r: Whether we are doing a relocatable link.
- bool
- is_relocatable() const
- { return this->is_relocatable_; }
+ DEFINE_bool(g, options::EXACTLY_ONE_DASH, '\0', false,
+ N_("Ignored"), NULL);
- // -s: Strip all symbols.
- bool
- strip_all() const
- { return this->strip_ == STRIP_ALL; }
+ DEFINE_string(soname, options::ONE_DASH, 'h', NULL,
+ N_("Set shared library name"), N_("FILENAME"));
- // -S: Strip debugging information.
- bool
- strip_debug() const
- { return this->strip_ == STRIP_ALL || this->strip_ == STRIP_DEBUG; }
+ DEFINE_bool(i, options::EXACTLY_ONE_DASH, '\0', false,
+ N_("Ignored"), NULL);
- // --allow-shlib-undefined: do not warn about unresolved symbols in
- // --shared libraries.
- bool
- allow_shlib_undefined() const
- { return this->allow_shlib_undefined_; }
+ DEFINE_double(hash_bucket_empty_fraction, options::TWO_DASHES, '\0', 0.0,
+ N_("Min fraction of empty buckets in dynamic hash"),
+ N_("FRACTION"));
- // -Bsymbolic: bind defined symbols locally.
- bool
- symbolic() const
- { return this->symbolic_; }
+ DEFINE_enum(hash_style, options::TWO_DASHES, '\0', "sysv",
+ N_("Dynamic hash style"), N_("[sysv,gnu,both]"),
+ {"sysv", "gnu", "both"});
- // --detect-odr-violations: Whether to search for One Defn Rule violations.
- bool
- detect_odr_violations() const
- { return this->detect_odr_violations_; }
+ DEFINE_string(dynamic_linker, options::TWO_DASHES, 'I', NULL,
+ N_("Set dynamic linker path"), N_("PROGRAM"));
- // --eh-frame-hdr: Whether to generate an exception frame header.
- bool
- create_eh_frame_hdr() const
- { return this->create_eh_frame_hdr_; }
+ DEFINE_bool(incremental, options::TWO_DASHES, '\0', false,
+ N_("Work in progress; do not use"),
+ N_("Do a full build"));
- // --rpath: The runtime search path.
- const Dir_list&
- rpath() const
- { return this->rpath_; }
+ DEFINE_special(incremental_changed, options::TWO_DASHES, '\0',
+ N_("Assume files changed"), NULL);
- // --rpath-link: The link time search patch for shared libraries.
- const Dir_list&
- rpath_link() const
- { return this->rpath_link_; }
+ DEFINE_special(incremental_unchanged, options::TWO_DASHES, '\0',
+ N_("Assume files didn't change"), NULL);
- // --shared: Whether generating a shared object.
- bool
- is_shared() const
- { return this->is_shared_; }
+ DEFINE_special(incremental_unknown, options::TWO_DASHES, '\0',
+ N_("Use timestamps to check files (default)"), NULL);
- // --static: Whether doing a static link.
- bool
- is_static() const
- { return this->is_static_; }
+ DEFINE_string(init, options::ONE_DASH, '\0', "_init",
+ N_("Call SYMBOL at load-time"), N_("SYMBOL"));
- // --stats: Print resource usage statistics.
- bool
- print_stats() const
- { return this->print_stats_; }
+ DEFINE_special(just_symbols, options::TWO_DASHES, '\0',
+ N_("Read only symbol values from FILE"), N_("FILE"));
- // --sysroot: The system root of a cross-linker.
- const std::string&
- sysroot() const
- { return this->sysroot_; }
+ DEFINE_bool(keep_files_mapped, options::TWO_DASHES, '\0',
+ sizeof(void*) >= 8,
+ N_("Map whole files to memory (default on 64-bit hosts)"),
+ N_("Map relevant file parts to memory (default on 32-bit "
+ "hosts)"));
- // -Ttext: The address of the .text section
- uint64_t
- text_segment_address() const
- { return this->text_segment_address_; }
+ DEFINE_special(library, options::TWO_DASHES, 'l',
+ N_("Search for library LIBNAME"), N_("LIBNAME"));
- // Whether -Ttext was used.
- bool
- user_set_text_segment_address() const
- { return this->text_segment_address_ != -1U; }
+ DEFINE_dirlist(library_path, options::TWO_DASHES, 'L',
+ N_("Add directory to search path"), N_("DIR"));
- // --threads: Whether to use threads.
- bool
- threads() const
- { return this->threads_; }
+ DEFINE_string(m, options::EXACTLY_ONE_DASH, 'm', "",
+ N_("Ignored for compatibility"), N_("EMULATION"));
- // --thread-count-initial: Threads to use in initial pass.
- int
- thread_count_initial() const
- { return this->thread_count_initial_; }
+ DEFINE_bool(print_map, options::TWO_DASHES, 'M', false,
+ N_("Write map file on standard output"), NULL);
+ DEFINE_string(Map, options::ONE_DASH, '\0', NULL, N_("Write map file"),
+ N_("MAPFILENAME"));
- // --thread-count-middle: Threads to use in middle pass.
- int
- thread_count_middle() const
- { return this->thread_count_middle_; }
+ DEFINE_bool(nmagic, options::TWO_DASHES, 'n', false,
+ N_("Do not page align data"), NULL);
+ DEFINE_bool(omagic, options::EXACTLY_TWO_DASHES, 'N', false,
+ N_("Do not page align data, do not make text readonly"),
+ N_("Page align data, make text readonly"));
- // --thread-count-final: Threads to use in final pass.
- int
- thread_count_final() const
- { return this->thread_count_final_; }
+ DEFINE_enable(new_dtags, options::EXACTLY_TWO_DASHES, '\0', false,
+ N_("Enable use of DT_RUNPATH and DT_FLAGS"),
+ N_("Disable use of DT_RUNPATH and DT_FLAGS"));
- // -z execstack, -z noexecstack
- bool
- is_execstack_set() const
- { return this->execstack_ != EXECSTACK_FROM_INPUT; }
+ DEFINE_bool(noinhibit_exec, options::TWO_DASHES, '\0', false,
+ N_("Create an output file even if errors occur"), NULL);
- bool
- is_stack_executable() const
- { return this->execstack_ == EXECSTACK_YES; }
+ DEFINE_bool_alias(no_undefined, defs, options::TWO_DASHES, '\0',
+ N_("Report undefined symbols (even with --shared)"),
+ NULL, false);
- private:
- // Don't copy this structure.
- General_options(const General_options&);
- General_options& operator=(const General_options&);
+ DEFINE_string(output, options::TWO_DASHES, 'o', "a.out",
+ N_("Set output file name"), N_("FILE"));
- friend class Command_line;
- friend class options::Command_line_options;
+ DEFINE_uint(optimize, options::EXACTLY_ONE_DASH, 'O', 0,
+ N_("Optimize output file size"), N_("LEVEL"));
- // Which symbols to strip.
- enum Strip
- {
- // Don't strip any symbols.
- STRIP_NONE,
- // Strip all symbols.
- STRIP_ALL,
- // Strip debugging information.
- STRIP_DEBUG
- };
+ DEFINE_string(oformat, options::EXACTLY_TWO_DASHES, '\0', "elf",
+ N_("Set output format"), N_("[binary]"));
- // Whether to mark the stack as executable.
- enum Execstack
- {
- // Not set on command line.
- EXECSTACK_FROM_INPUT,
- // Mark the stack as executable.
- EXECSTACK_YES,
- // Mark the stack as not executable.
- EXECSTACK_NO
- };
+ DEFINE_bool(pie, options::ONE_DASH, '\0', false,
+ N_("Create a position independent executable"), NULL);
+ DEFINE_bool_alias(pic_executable, pie, options::TWO_DASHES, '\0',
+ N_("Create a position independent executable"), NULL,
+ false);
- void
- set_export_dynamic()
- { this->export_dynamic_ = true; }
+#ifdef ENABLE_PLUGINS
+ DEFINE_special(plugin, options::TWO_DASHES, '\0',
+ N_("Load a plugin library"), N_("PLUGIN"));
+ DEFINE_special(plugin_opt, options::TWO_DASHES, '\0',
+ N_("Pass an option to the plugin"), N_("OPTION"));
+#endif
- void
- set_dynamic_linker(const char* arg)
- { this->dynamic_linker_ = arg; }
+ DEFINE_bool(preread_archive_symbols, options::TWO_DASHES, '\0', false,
+ N_("Preread archive symbols when multi-threaded"), NULL);
- void
- add_to_search_path(const char* arg)
- { this->search_path_.push_back(Search_directory(arg, false)); }
+ DEFINE_string(print_symbol_counts, options::TWO_DASHES, '\0', NULL,
+ N_("Print symbols defined and used for each input"),
+ N_("FILENAME"));
- void
- add_to_search_path_with_sysroot(const char* arg)
- { this->search_path_.push_back(Search_directory(arg, true)); }
+ DEFINE_bool(Qy, options::EXACTLY_ONE_DASH, '\0', false,
+ N_("Ignored for SVR4 compatibility"), NULL);
- void
- set_optimization_level(const char* arg)
- { this->optimization_level_ = atoi(arg); }
+ DEFINE_bool(emit_relocs, options::TWO_DASHES, 'q', false,
+ N_("Generate relocations in output"), NULL);
- void
- set_output_file_name(const char* arg)
- { this->output_file_name_ = arg; }
+ DEFINE_bool(relocatable, options::EXACTLY_ONE_DASH, 'r', false,
+ N_("Generate relocatable output"), NULL);
- void
- set_relocatable()
- { this->is_relocatable_ = true; }
+ DEFINE_bool(relax, options::TWO_DASHES, '\0', false,
+ N_("Relax branches on certain targets"), NULL);
- void
- set_strip_all()
- { this->strip_ = STRIP_ALL; }
+ DEFINE_string(retain_symbols_file, options::TWO_DASHES, '\0', NULL,
+ N_("keep only symbols listed in this file"), N_("FILE"));
+
+ // -R really means -rpath, but can mean --just-symbols for
+ // compatibility with GNU ld. -rpath is always -rpath, so we list
+ // it separately.
+ DEFINE_special(R, options::EXACTLY_ONE_DASH, 'R',
+ N_("Add DIR to runtime search path"), N_("DIR"));
+
+ DEFINE_dirlist(rpath, options::ONE_DASH, '\0',
+ N_("Add DIR to runtime search path"), N_("DIR"));
+
+ DEFINE_dirlist(rpath_link, options::TWO_DASHES, '\0',
+ N_("Add DIR to link time shared library search path"),
+ N_("DIR"));
+
+ DEFINE_optional_string(sort_common, options::TWO_DASHES, '\0', NULL,
+ N_("Sort common symbols by alignment"),
+ N_("[={ascending,descending}]"));
+
+ DEFINE_bool(strip_all, options::TWO_DASHES, 's', false,
+ N_("Strip all symbols"), NULL);
+ DEFINE_bool(strip_debug, options::TWO_DASHES, 'S', false,
+ N_("Strip debugging information"), NULL);
+ DEFINE_bool(strip_debug_non_line, options::TWO_DASHES, '\0', false,
+ N_("Emit only debug line number information"), NULL);
+ DEFINE_bool(strip_debug_gdb, options::TWO_DASHES, '\0', false,
+ N_("Strip debug symbols that are unused by gdb "
+ "(at least versions <= 6.7)"), NULL);
+ DEFINE_bool(strip_lto_sections, options::TWO_DASHES, '\0', true,
+ N_("Strip LTO intermediate code sections"), NULL);
+
+ DEFINE_int(stub_group_size, options::TWO_DASHES , '\0', 1,
+ N_("(ARM only) The maximum distance from instructions in a group "
+ "of sections to their stubs. Negative values mean stubs "
+ "are always after the group. 1 means using default size.\n"),
+ N_("SIZE"));
+
+ DEFINE_bool(no_keep_memory, options::TWO_DASHES, '\0', false,
+ N_("Use less memory and more disk I/O "
+ "(included only for compatibility with GNU ld)"), NULL);
+
+ DEFINE_bool(shared, options::ONE_DASH, 'G', false,
+ N_("Generate shared library"), NULL);
+
+ DEFINE_bool(Bshareable, options::ONE_DASH, '\0', false,
+ N_("Generate shared library"), NULL);
+
+ DEFINE_uint(split_stack_adjust_size, options::TWO_DASHES, '\0', 0x4000,
+ N_("Stack size when -fsplit-stack function calls non-split"),
+ N_("SIZE"));
+
+ // This is not actually special in any way, but I need to give it
+ // a non-standard accessor-function name because 'static' is a keyword.
+ DEFINE_special(static, options::ONE_DASH, '\0',
+ N_("Do not link against shared libraries"), NULL);
+
+ DEFINE_enum(icf, options::TWO_DASHES, '\0', "none",
+ N_("Identical Code Folding. "
+ "\'--icf=safe\' folds only ctors and dtors."),
+ ("[none,all,safe]"),
+ {"none", "all", "safe"});
+
+ DEFINE_uint(icf_iterations, options::TWO_DASHES , '\0', 0,
+ N_("Number of iterations of ICF (default 2)"), N_("COUNT"));
+
+ DEFINE_bool(print_icf_sections, options::TWO_DASHES, '\0', false,
+ N_("List folded identical sections on stderr"),
+ N_("Do not list folded identical sections"));
+
+ DEFINE_set(keep_unique, options::TWO_DASHES, '\0',
+ N_("Do not fold this symbol during ICF"), N_("SYMBOL"));
+
+ DEFINE_bool(gc_sections, options::TWO_DASHES, '\0', false,
+ N_("Remove unused sections"),
+ N_("Don't remove unused sections (default)"));
+
+ DEFINE_bool(print_gc_sections, options::TWO_DASHES, '\0', false,
+ N_("List removed unused sections on stderr"),
+ N_("Do not list removed unused sections"));
+
+ DEFINE_bool(stats, options::TWO_DASHES, '\0', false,
+ N_("Print resource usage statistics"), NULL);
+
+ DEFINE_string(sysroot, options::TWO_DASHES, '\0', "",
+ N_("Set target system root directory"), N_("DIR"));
+
+ DEFINE_bool(trace, options::TWO_DASHES, 't', false,
+ N_("Print the name of each input file"), NULL);
+
+ DEFINE_special(script, options::TWO_DASHES, 'T',
+ N_("Read linker script"), N_("FILE"));
+
+ DEFINE_bool(threads, options::TWO_DASHES, '\0', false,
+ N_("Run the linker multi-threaded"),
+ N_("Do not run the linker multi-threaded"));
+ DEFINE_uint(thread_count, options::TWO_DASHES, '\0', 0,
+ N_("Number of threads to use"), N_("COUNT"));
+ DEFINE_uint(thread_count_initial, options::TWO_DASHES, '\0', 0,
+ N_("Number of threads to use in initial pass"), N_("COUNT"));
+ DEFINE_uint(thread_count_middle, options::TWO_DASHES, '\0', 0,
+ N_("Number of threads to use in middle pass"), N_("COUNT"));
+ DEFINE_uint(thread_count_final, options::TWO_DASHES, '\0', 0,
+ N_("Number of threads to use in final pass"), N_("COUNT"));
+
+ DEFINE_uint64(Tbss, options::ONE_DASH, '\0', -1U,
+ N_("Set the address of the bss segment"), N_("ADDRESS"));
+ DEFINE_uint64(Tdata, options::ONE_DASH, '\0', -1U,
+ N_("Set the address of the data segment"), N_("ADDRESS"));
+ DEFINE_uint64(Ttext, options::ONE_DASH, '\0', -1U,
+ N_("Set the address of the text segment"), N_("ADDRESS"));
+
+ DEFINE_set(undefined, options::TWO_DASHES, 'u',
+ N_("Create undefined reference to SYMBOL"), N_("SYMBOL"));
+
+ DEFINE_bool(verbose, options::TWO_DASHES, '\0', false,
+ N_("Synonym for --debug=files"), NULL);
+
+ DEFINE_special(version_script, options::TWO_DASHES, '\0',
+ N_("Read version script"), N_("FILE"));
+
+ DEFINE_bool(warn_common, options::TWO_DASHES, '\0', false,
+ N_("Warn about duplicate common symbols"),
+ N_("Do not warn about duplicate common symbols (default)"));
+
+ DEFINE_bool(warn_constructors, options::TWO_DASHES, '\0', false,
+ N_("Ignored"), N_("Ignored"));
+
+ DEFINE_bool(warn_search_mismatch, options::TWO_DASHES, '\0', true,
+ N_("Warn when skipping an incompatible library"),
+ N_("Don't warn when skipping an incompatible library"));
+
+ DEFINE_bool(whole_archive, options::TWO_DASHES, '\0', false,
+ N_("Include all archive contents"),
+ N_("Include only needed archive contents"));
+
+ DEFINE_set(wrap, options::TWO_DASHES, '\0',
+ N_("Use wrapper functions for SYMBOL"), N_("SYMBOL"));
+
+ DEFINE_set(trace_symbol, options::TWO_DASHES, 'y',
+ N_("Trace references to symbol"), N_("SYMBOL"));
+
+ DEFINE_string(Y, options::EXACTLY_ONE_DASH, 'Y', "",
+ N_("Default search path for Solaris compatibility"),
+ N_("PATH"));
+
+ DEFINE_special(start_group, options::TWO_DASHES, '(',
+ N_("Start a library search group"), NULL);
+ DEFINE_special(end_group, options::TWO_DASHES, ')',
+ N_("End a library search group"), NULL);
+
+ // The -z options.
+
+ DEFINE_bool(combreloc, options::DASH_Z, '\0', true,
+ N_("Sort dynamic relocs"),
+ N_("Do not sort dynamic relocs"));
+ DEFINE_uint64(common_page_size, options::DASH_Z, '\0', 0,
+ N_("Set common page size to SIZE"), N_("SIZE"));
+ DEFINE_bool(defs, options::DASH_Z, '\0', false,
+ N_("Report undefined symbols (even with --shared)"),
+ NULL);
+ DEFINE_bool(execstack, options::DASH_Z, '\0', false,
+ N_("Mark output as requiring executable stack"), NULL);
+ DEFINE_bool(initfirst, options::DASH_Z, '\0', false,
+ N_("Mark DSO to be initialized first at runtime"),
+ NULL);
+ DEFINE_bool(interpose, options::DASH_Z, '\0', false,
+ N_("Mark object to interpose all DSOs but executable"),
+ NULL);
+ DEFINE_bool(lazy, options::DASH_Z, '\0', false,
+ N_("Mark object for lazy runtime binding (default)"),
+ NULL);
+ DEFINE_bool(loadfltr, options::DASH_Z, '\0', false,
+ N_("Mark object requiring immediate process"),
+ NULL);
+ DEFINE_uint64(max_page_size, options::DASH_Z, '\0', 0,
+ N_("Set maximum page size to SIZE"), N_("SIZE"));
+ DEFINE_bool(copyreloc, options::DASH_Z, '\0', true,
+ NULL,
+ N_("Do not create copy relocs"));
+ DEFINE_bool(nodefaultlib, options::DASH_Z, '\0', false,
+ N_("Mark object not to use default search paths"),
+ NULL);
+ DEFINE_bool(nodelete, options::DASH_Z, '\0', false,
+ N_("Mark DSO non-deletable at runtime"),
+ NULL);
+ DEFINE_bool(nodlopen, options::DASH_Z, '\0', false,
+ N_("Mark DSO not available to dlopen"),
+ NULL);
+ DEFINE_bool(nodump, options::DASH_Z, '\0', false,
+ N_("Mark DSO not available to dldump"),
+ NULL);
+ DEFINE_bool(noexecstack, options::DASH_Z, '\0', false,
+ N_("Mark output as not requiring executable stack"), NULL);
+ DEFINE_bool(now, options::DASH_Z, '\0', false,
+ N_("Mark object for immediate function binding"),
+ NULL);
+ DEFINE_bool(origin, options::DASH_Z, '\0', false,
+ N_("Mark DSO to indicate that needs immediate $ORIGIN "
+ "processing at runtime"), NULL);
+ DEFINE_bool(relro, options::DASH_Z, '\0', false,
+ N_("Where possible mark variables read-only after relocation"),
+ N_("Don't mark variables read-only after relocation"));
- // Note: normalize_options() depends on the fact that this turns off
- // STRIP_ALL if it were already set.
- void
- set_strip_debug()
- { this->strip_ = STRIP_DEBUG; }
+ public:
+ typedef options::Dir_list Dir_list;
- void
- set_allow_shlib_undefined()
- { this->allow_shlib_undefined_ = true; }
+ General_options();
- void
- set_no_allow_shlib_undefined()
- { this->allow_shlib_undefined_ = false; }
+ // Does post-processing on flags, making sure they all have
+ // non-conflicting values. Also converts some flags from their
+ // "standard" types (string, etc), to another type (enum, DirList),
+ // which can be accessed via a separate method. Dies if it notices
+ // any problems.
+ void finalize();
- void
- set_symbolic()
- { this->symbolic_ = true; }
+ // True if we printed the version information.
+ bool
+ printed_version() const
+ { return this->printed_version_; }
- void
- set_detect_odr_violations()
- { this->detect_odr_violations_ = true; }
+ // The macro defines output() (based on --output), but that's a
+ // generic name. Provide this alternative name, which is clearer.
+ const char*
+ output_file_name() const
+ { return this->output(); }
- void
- set_create_eh_frame_hdr()
- { this->create_eh_frame_hdr_ = true; }
+ // This is not defined via a flag, but combines flags to say whether
+ // the output is position-independent or not.
+ bool
+ output_is_position_independent() const
+ { return this->shared() || this->pie(); }
- void
- add_to_rpath(const char* arg)
- { this->rpath_.push_back(Search_directory(arg, false)); }
+ // Return true if the output is something that can be exec()ed, such
+ // as a static executable, or a position-dependent or
+ // position-independent executable, but not a dynamic library or an
+ // object file.
+ bool
+ output_is_executable() const
+ { return !this->shared() && !this->relocatable(); }
- void
- add_to_rpath_link(const char* arg)
- { this->rpath_link_.push_back(Search_directory(arg, false)); }
+ // This would normally be static(), and defined automatically, but
+ // since static is a keyword, we need to come up with our own name.
+ bool
+ is_static() const
+ { return static_; }
- void
- set_shared()
- { this->is_shared_ = true; }
+ // In addition to getting the input and output formats as a string
+ // (via format() and oformat()), we also give access as an enum.
+ enum Object_format
+ {
+ // Ordinary ELF.
+ OBJECT_FORMAT_ELF,
+ // Straight binary format.
+ OBJECT_FORMAT_BINARY
+ };
- void
- set_static()
- { this->is_static_ = true; }
+ // Convert a string to an Object_format. Gives an error if the
+ // string is not recognized.
+ static Object_format
+ string_to_object_format(const char* arg);
- void
- set_stats()
- { this->print_stats_ = true; }
+ // Note: these functions are not very fast.
+ Object_format format_enum() const;
+ Object_format oformat_enum() const;
- void
- set_sysroot(const char* arg)
- { this->sysroot_ = arg; }
+ // Return whether FILENAME is in a system directory.
+ bool
+ is_in_system_directory(const std::string& name) const;
- void
- set_text_segment_address(const char* arg)
- {
- char* endptr;
- this->text_segment_address_ = strtoull(arg, &endptr, 0);
- if (*endptr != '\0'
- || this->text_segment_address_ == -1U)
- {
- fprintf(stderr, _("%s: invalid argument to -Ttext: %s\n"),
- program_name, arg);
- ::exit(1);
- }
- }
+ // RETURN whether SYMBOL_NAME should be kept, according to symbols_to_retain_.
+ bool
+ should_retain_symbol(const char* symbol_name) const
+ {
+ if (symbols_to_retain_.empty()) // means flag wasn't specified
+ return true;
+ return symbols_to_retain_.find(symbol_name) != symbols_to_retain_.end();
+ }
+
+ // These are the best way to get access to the execstack state,
+ // not execstack() and noexecstack() which are hard to use properly.
+ bool
+ is_execstack_set() const
+ { return this->execstack_status_ != EXECSTACK_FROM_INPUT; }
- int
- parse_thread_count(const char* arg)
- {
- char* endptr;
- int count = strtol(arg, &endptr, 0);
- if (*endptr != '\0' || count < 0)
- {
- fprintf(stderr, _("%s: invalid thread count: %s\n"),
- program_name, arg);
- ::exit(1);
- }
- return count;
- }
+ bool
+ is_stack_executable() const
+ { return this->execstack_status_ == EXECSTACK_YES; }
- void
- set_threads()
- { this->threads_ = true; }
+ bool
+ icf_enabled() const
+ { return this->icf_status_ != ICF_NONE; }
- void
- clear_threads()
- { this->threads_ = false; }
+ bool
+ icf_safe_folding() const
+ { return this->icf_status_ == ICF_SAFE; }
+
+ // The --demangle option takes an optional string, and there is also
+ // a --no-demangle option. This is the best way to decide whether
+ // to demangle or not.
+ bool
+ do_demangle() const
+ { return this->do_demangle_; }
+ // Returns TRUE if any plugin libraries have been loaded.
+ bool
+ has_plugins() const
+ { return this->plugins_ != NULL; }
+
+ // Return a pointer to the plugin manager.
+ Plugin_manager*
+ plugins() const
+ { return this->plugins_; }
+
+ // True iff SYMBOL was found in the file specified by dynamic-list.
+ bool
+ in_dynamic_list(const char* symbol) const
+ { return this->dynamic_list_.version_script_info()->symbol_is_local(symbol); }
+
+ // Finalize the dynamic list.
void
- set_thread_count(const char* arg)
+ finalize_dynamic_list()
+ { this->dynamic_list_.version_script_info()->finalize(); }
+
+ // The disposition given by the --incremental-changed,
+ // --incremental-unchanged or --incremental-unknown option. The
+ // value may change as we proceed parsing the command line flags.
+ Incremental_disposition
+ incremental_disposition() const
+ { return this->incremental_disposition_; }
+
+ // Return true if S is the name of a library excluded from automatic
+ // symbol export.
+ bool
+ check_excluded_libs (const std::string &s) const;
+
+ private:
+ // Don't copy this structure.
+ General_options(const General_options&);
+ General_options& operator=(const General_options&);
+
+ // Whether to mark the stack as executable.
+ enum Execstack
{
- int count = this->parse_thread_count(arg);
- this->thread_count_initial_ = count;
- this->thread_count_middle_ = count;
- this->thread_count_final_ = count;
- }
+ // Not set on command line.
+ EXECSTACK_FROM_INPUT,
+ // Mark the stack as executable (-z execstack).
+ EXECSTACK_YES,
+ // Mark the stack as not executable (-z noexecstack).
+ EXECSTACK_NO
+ };
+
+ enum Icf_status
+ {
+ // Do not fold any functions (Default or --icf=none).
+ ICF_NONE,
+ // All functions are candidates for folding. (--icf=all).
+ ICF_ALL,
+ // Only ctors and dtors are candidates for folding. (--icf=safe).
+ ICF_SAFE
+ };
void
- set_thread_count_initial(const char* arg)
- { this->thread_count_initial_ = this->parse_thread_count(arg); }
+ set_icf_status(Icf_status value)
+ { this->icf_status_ = value; }
void
- set_thread_count_middle(const char* arg)
- { this->thread_count_initial_ = this->parse_thread_count(arg); }
+ set_execstack_status(Execstack value)
+ { this->execstack_status_ = value; }
void
- set_thread_count_final(const char* arg)
- { this->thread_count_initial_ = this->parse_thread_count(arg); }
+ set_do_demangle(bool value)
+ { this->do_demangle_ = value; }
void
- ignore(const char*)
- { }
+ set_static(bool value)
+ { static_ = value; }
+ // These are called by finalize() to set up the search-path correctly.
void
- set_execstack()
- { this->execstack_ = EXECSTACK_YES; }
+ add_to_library_path_with_sysroot(const char* arg)
+ { this->add_search_directory_to_library_path(Search_directory(arg, true)); }
+ // Apply any sysroot to the directory lists.
void
- set_noexecstack()
- { this->execstack_ = EXECSTACK_NO; }
+ add_sysroot();
- // Handle the -z option.
+ // Add a plugin and its arguments to the list of plugins.
void
- handle_z_option(const char*);
+ add_plugin(const char *filename);
- // Apply any sysroot to the directory lists.
+ // Add a plugin option.
void
- add_sysroot();
+ add_plugin_option(const char* opt);
- bool export_dynamic_;
- const char* dynamic_linker_;
- Dir_list search_path_;
- int optimization_level_;
- const char* output_file_name_;
- bool is_relocatable_;
- Strip strip_;
- bool allow_shlib_undefined_;
- bool symbolic_;
- bool detect_odr_violations_;
- bool create_eh_frame_hdr_;
- Dir_list rpath_;
- Dir_list rpath_link_;
- bool is_shared_;
- bool is_static_;
- bool print_stats_;
- std::string sysroot_;
- uint64_t text_segment_address_;
- bool threads_;
- int thread_count_initial_;
- int thread_count_middle_;
- int thread_count_final_;
- Execstack execstack_;
+ // Whether we printed version information.
+ bool printed_version_;
+ // Whether to mark the stack as executable.
+ Execstack execstack_status_;
+ // Whether to do code folding.
+ Icf_status icf_status_;
+ // Whether to do a static link.
+ bool static_;
+ // Whether to do demangling.
+ bool do_demangle_;
+ // List of plugin libraries.
+ Plugin_manager* plugins_;
+ // The parsed output of --dynamic-list files. For convenience in
+ // script.cc, we store this as a Script_options object, even though
+ // we only use a single Version_tree from it.
+ Script_options dynamic_list_;
+ // The disposition given by the --incremental-changed,
+ // --incremental-unchanged or --incremental-unknown option. The
+ // value may change as we proceed parsing the command line flags.
+ Incremental_disposition incremental_disposition_;
+ // Whether we have seen one of the options that require incremental
+ // build (--incremental-changed, --incremental-unchanged or
+ // --incremental-unknown)
+ bool implicit_incremental_;
+ // Libraries excluded from automatic export, via --exclude-libs.
+ Unordered_set<std::string> excluded_libs_;
+ // List of symbol-names to keep, via -retain-symbol-info.
+ Unordered_set<std::string> symbols_to_retain_;
};
-// The current state of the position dependent options.
+// The position-dependent options. We use this to store the state of
+// the commandline at a particular point in parsing for later
+// reference. For instance, if we see "ld --whole-archive foo.a
+// --no-whole-archive," we want to store the whole-archive option with
+// foo.a, so when the time comes to parse foo.a we know we should do
+// it in whole-archive mode. We could store all of General_options,
+// but that's big, so we just pick the subset of flags that actually
+// change in a position-dependent way.
+
+#define DEFINE_posdep(varname__, type__) \
+ public: \
+ type__ \
+ varname__() const \
+ { return this->varname__##_; } \
+ \
+ void \
+ set_##varname__(type__ value) \
+ { this->varname__##_ = value; } \
+ private: \
+ type__ varname__##_
class Position_dependent_options
{
public:
- Position_dependent_options();
-
- // -Bdynamic/-Bstatic: Whether we are searching for a static archive
- // -rather than a shared object.
- bool
- do_static_search() const
- { return this->do_static_search_; }
-
- // --as-needed: Whether to add a DT_NEEDED argument only if the
- // dynamic object is used.
- bool
- as_needed() const
- { return this->as_needed_; }
-
- // --whole-archive: Whether to include the entire contents of an
- // --archive.
- bool
- include_whole_archive() const
- { return this->include_whole_archive_; }
-
- void
- set_static_search()
- { this->do_static_search_ = true; }
-
- void
- set_dynamic_search()
- { this->do_static_search_ = false; }
-
- void
- set_as_needed()
- { this->as_needed_ = true; }
-
- void
- clear_as_needed()
- { this->as_needed_ = false; }
+ Position_dependent_options(const General_options& options
+ = Position_dependent_options::default_options_)
+ { copy_from_options(options); }
- void
- set_whole_archive()
- { this->include_whole_archive_ = true; }
+ void copy_from_options(const General_options& options)
+ {
+ this->set_as_needed(options.as_needed());
+ this->set_Bdynamic(options.Bdynamic());
+ this->set_format_enum(options.format_enum());
+ this->set_whole_archive(options.whole_archive());
+ this->set_incremental_disposition(options.incremental_disposition());
+ }
- void
- clear_whole_archive()
- { this->include_whole_archive_ = false; }
+ DEFINE_posdep(as_needed, bool);
+ DEFINE_posdep(Bdynamic, bool);
+ DEFINE_posdep(format_enum, General_options::Object_format);
+ DEFINE_posdep(whole_archive, bool);
+ DEFINE_posdep(incremental_disposition, Incremental_disposition);
private:
- bool do_static_search_;
- bool as_needed_;
- bool include_whole_archive_;
+ // This is a General_options with everything set to its default
+ // value. A Position_dependent_options created with no argument
+ // will take its values from here.
+ static General_options default_options_;
};
+
// A single file or library argument from the command line.
class Input_file_argument
{
public:
+ enum Input_file_type
+ {
+ // A regular file, name used as-is, not searched.
+ INPUT_FILE_TYPE_FILE,
+ // A library name. When used, "lib" will be prepended and ".so" or
+ // ".a" appended to make a filename, and that filename will be searched
+ // for using the -L paths.
+ INPUT_FILE_TYPE_LIBRARY,
+ // A regular file, name used as-is, but searched using the -L paths.
+ INPUT_FILE_TYPE_SEARCHED_FILE
+ };
+
// name: file name or library name
- // is_lib: true if name is a library name: that is, emits the leading
- // "lib" and trailing ".so"/".a" from the name
+ // type: the type of this input file.
// extra_search_path: an extra directory to look for the file, prior
// to checking the normal library search path. If this is "",
// then no extra directory is added.
+ // just_symbols: whether this file only defines symbols.
// options: The position dependent options at this point in the
// command line, such as --whole-archive.
Input_file_argument()
- : name_(), is_lib_(false), extra_search_path_(""), options_()
+ : name_(), type_(INPUT_FILE_TYPE_FILE), extra_search_path_(""),
+ just_symbols_(false), options_()
+ { }
+
+ Input_file_argument(const char* name, Input_file_type type,
+ const char* extra_search_path,
+ bool just_symbols,
+ const Position_dependent_options& options)
+ : name_(name), type_(type), extra_search_path_(extra_search_path),
+ just_symbols_(just_symbols), options_(options)
{ }
- Input_file_argument(const char* name, bool is_lib,
+ // You can also pass in a General_options instance instead of a
+ // Position_dependent_options. In that case, we extract the
+ // position-independent vars from the General_options and only store
+ // those.
+ Input_file_argument(const char* name, Input_file_type type,
const char* extra_search_path,
- const Position_dependent_options& options)
- : name_(name), is_lib_(is_lib), extra_search_path_(extra_search_path),
- options_(options)
+ bool just_symbols,
+ const General_options& options)
+ : name_(name), type_(type), extra_search_path_(extra_search_path),
+ just_symbols_(just_symbols), options_(options)
{ }
const char*
bool
is_lib() const
- { return this->is_lib_; }
+ { return type_ == INPUT_FILE_TYPE_LIBRARY; }
+
+ bool
+ is_searched_file() const
+ { return type_ == INPUT_FILE_TYPE_SEARCHED_FILE; }
const char*
extra_search_path() const
{
return (this->extra_search_path_.empty()
? NULL
- : this->extra_search_path_.c_str());
+ : this->extra_search_path_.c_str());
}
+ // Return whether we should only read symbols from this file.
+ bool
+ just_symbols() const
+ { return this->just_symbols_; }
+
// Return whether this file may require a search using the -L
// options.
bool
may_need_search() const
- { return this->is_lib_ || !this->extra_search_path_.empty(); }
+ {
+ return (this->is_lib()
+ || this->is_searched_file()
+ || !this->extra_search_path_.empty());
+ }
private:
// We use std::string, not const char*, here for convenience when
// using script files, so that we do not have to preserve the string
// in that case.
std::string name_;
- bool is_lib_;
+ Input_file_type type_;
std::string extra_search_path_;
+ bool just_symbols_;
Position_dependent_options options_;
};
Input_file_group* group_;
};
+typedef std::vector<Input_argument> Input_argument_list;
+
// A group from the command line. This is a set of arguments within
// --start-group ... --end-group.
class Input_file_group
{
public:
- typedef std::vector<Input_argument> Files;
- typedef Files::const_iterator const_iterator;
+ typedef Input_argument_list::const_iterator const_iterator;
Input_file_group()
: files_()
{ return this->files_.end(); }
private:
- Files files_;
+ Input_argument_list files_;
};
// A list of files from the command line or a script.
class Input_arguments
{
public:
- typedef std::vector<Input_argument> Input_argument_list;
typedef Input_argument_list::const_iterator const_iterator;
Input_arguments()
bool in_group_;
};
-// All the information read from the command line.
+
+// All the information read from the command line. These are held in
+// three separate structs: one to hold the options (--foo), one to
+// hold the filenames listed on the commandline, and one to hold
+// linker script information. This third is not a subset of the other
+// two because linker scripts can be specified either as options (via
+// -T) or as a file.
class Command_line
{
// Process the command line options. This will exit with an
// appropriate error message if an unrecognized option is seen.
void
- process(int argc, char** argv);
+ process(int argc, const char** argv);
// Process one command-line option. This takes the index of argv to
- // process, and returns the index for the next option.
- int
- process_one_option(int argc, char** argv, int i, bool* no_more_options);
-
- // Handle a -l option.
+ // process, and returns the index for the next option. no_more_options
+ // is set to true if argv[i] is "--".
int
- process_l_option(int, char**, char*, bool);
-
- // Handle a --start-group option.
- void
- start_group(const char* arg);
-
- // Handle a --end-group option.
- void
- end_group(const char* arg);
-
- // Get an option argument--a helper function for special processing.
- const char*
- get_special_argument(const char* longname, int argc, char** argv,
- const char* arg, bool long_option,
- int *pret);
+ process_one_option(int argc, const char** argv, int i,
+ bool* no_more_options);
// Get the general options.
const General_options&
position_dependent_options() const
{ return this->position_options_; }
+ // Get the linker-script options.
+ Script_options&
+ script_options()
+ { return this->script_options_; }
+
+ // Finalize the version-script options and return them.
+ const Version_script_info&
+ version_script();
+
+ // Get the input files.
+ Input_arguments&
+ inputs()
+ { return this->inputs_; }
+
// The number of input files.
int
number_of_input_files() const
Command_line(const Command_line&);
Command_line& operator=(const Command_line&);
- // Report usage error.
- void
- usage() ATTRIBUTE_NORETURN;
- void
- usage(const char* msg, const char* opt) ATTRIBUTE_NORETURN;
- void
- usage(const char* msg, char opt) ATTRIBUTE_NORETURN;
-
- // Apply a command line option.
- void
- apply_option(const gold::options::One_option&, const char*);
-
- // Add a file.
- void
- add_file(const char* name, bool is_lib);
-
- // Examine the result of processing the command-line, and verify
- // the flags do not contradict each other or are otherwise illegal.
- void
- normalize_options();
+ // This is a dummy class to provide a constructor that runs before
+ // the constructor for the General_options. The Pre_options constructor
+ // is used as a hook to set the flag enabling the options to register
+ // themselves.
+ struct Pre_options {
+ Pre_options();
+ };
+ // This must come before options_!
+ Pre_options pre_options_;
General_options options_;
Position_dependent_options position_options_;
+ Script_options script_options_;
Input_arguments inputs_;
};
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