// options.h -- handle command line options for gold -*- C++ -*-
+// Copyright 2006, 2007, 2008 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.
+
// Command_line
// Holds everything we get from the command line.
// General_options (from Command_line::options())
#ifndef GOLD_OPTIONS_H
#define GOLD_OPTIONS_H
+#include <cstdlib>
#include <list>
#include <string>
#include <vector>
+#include "script.h"
+
namespace gold
{
class Command_line;
class Input_file_group;
+class Position_dependent_options;
-namespace options {
+namespace options
+{
class Command_line_options;
struct One_option;
+struct One_z_option;
+struct One_debug_option;
} // End namespace gold::options.
+// 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
+// is found within the sysroot, we will apply the sysroot to any files
+// named by that script.
+
+class Search_directory
+{
+ public:
+ // We need a default constructor because we put this in a
+ // std::vector.
+ Search_directory()
+ : name_(NULL), put_in_sysroot_(false), is_in_sysroot_(false)
+ { }
+
+ // 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()); }
+
+ // 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
+ // set to true for any enries which are in the sysroot (this will
+ // naturally include any entries for which put_in_sysroot_ is true).
+ // SYSROOT is the sysroot, CANONICAL_SYSROOT is the result of
+ // passing SYSROOT to lrealpath.
+ void
+ add_sysroot(const char* sysroot, const char* canonical_sysroot);
+
+ // Get the directory name.
+ const std::string&
+ name() const
+ { return this->name_; }
+
+ // Return whether this directory is in the sysroot.
+ bool
+ is_in_sysroot() const
+ { return this->is_in_sysroot_; }
+
+ private:
+ std::string name_;
+ bool put_in_sysroot_;
+ 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();
+ General_options(Script_options*);
+
+ // -e: set entry address.
+ const char*
+ entry() const
+ { return this->script_options_->entry(); }
+
+ // -E: export dynamic symbols.
+ bool
+ export_dynamic() const
+ { return this->export_dynamic_; }
+
+ // -h: shared library name.
+ const char*
+ soname() const
+ { return this->soname_; }
// -I: dynamic linker name.
const char*
{ return this->dynamic_linker_; }
// -L: Library search path.
- typedef std::vector<const char*> Dir_list;
+ typedef std::vector<Search_directory> Dir_list;
const Dir_list&
search_path() const
{ return this->search_path_; }
+ // -O: optimization level (0: don't try to optimize output size).
+ int
+ optimization_level() const
+ { return this->optimization_level_; }
+
// -o: Output file name.
const char*
output_file_name() const
is_relocatable() const
{ return this->is_relocatable_; }
+ // -s: Strip all symbols.
+ bool
+ strip_all() const
+ { return this->strip_ == STRIP_ALL; }
+
+ // -S: Strip debugging information.
+ bool
+ strip_debug() const
+ { return this->strip_ == STRIP_ALL || this->strip_ == STRIP_DEBUG; }
+
+ // --strip-debug-gdb: strip only debugging information that's not
+ // used by gdb (at least, for gdb versions <= 6.7).
+ bool
+ strip_debug_gdb() const
+ { return this->strip_debug() || this->strip_ == STRIP_DEBUG_UNUSED_BY_GDB; }
+
+ // --allow-shlib-undefined: do not warn about unresolved symbols in
+ // --shared libraries.
+ bool
+ allow_shlib_undefined() const
+ { return this->allow_shlib_undefined_; }
+
+ // -Bsymbolic: bind defined symbols locally.
+ bool
+ symbolic() const
+ { return this->symbolic_; }
+
+ // --compress-debug-sections: compress .debug_* sections in the
+ // output file using the given compression method. This is useful
+ // when the tools (such as gdb) support compressed sections.
+ bool
+ compress_debug_sections() const
+ { return this->compress_debug_sections_ != NO_COMPRESSION; }
+
+ bool
+ zlib_compress_debug_sections() const
+ { return this->compress_debug_sections_ == ZLIB_COMPRESSION; }
+
+ // --demangle: demangle C++ symbols in our log messages.
+ bool
+ demangle() const
+ { return this->demangle_; }
+
+ // --detect-odr-violations: Whether to search for One Defn Rule violations.
+ bool
+ detect_odr_violations() const
+ { return this->detect_odr_violations_; }
+
+ // --eh-frame-hdr: Whether to generate an exception frame header.
+ bool
+ create_eh_frame_hdr() const
+ { return this->create_eh_frame_hdr_; }
+
// --rpath: The runtime search path.
const Dir_list&
rpath() const
{ return this->rpath_; }
+ // --rpath-link: The link time search patch for shared libraries.
+ const Dir_list&
+ rpath_link() const
+ { return this->rpath_link_; }
+
// --shared: Whether generating a shared object.
bool
is_shared() const
is_static() const
{ return this->is_static_; }
+ // --stats: Print resource usage statistics.
+ bool
+ print_stats() const
+ { return this->print_stats_; }
+
+ // --sysroot: The system root of a cross-linker.
+ const std::string&
+ sysroot() const
+ { return this->sysroot_; }
+
+ // --version-script: The version script to apply if --shared is true.
+ const Version_script_info&
+ version_script() const
+ { return *this->script_options_->version_script_info(); }
+
+ // -Ttext: The address of the .text section
+ uint64_t
+ text_segment_address() const
+ { return this->text_segment_address_; }
+
+ // Whether -Ttext was used.
+ bool
+ user_set_text_segment_address() const
+ { return this->text_segment_address_ != -1U; }
+
+ // --threads: Whether to use threads.
+ bool
+ threads() const
+ { return this->threads_; }
+
+ // --thread-count-initial: Threads to use in initial pass.
+ int
+ thread_count_initial() const
+ { return this->thread_count_initial_; }
+
+ // --thread-count-middle: Threads to use in middle pass.
+ int
+ thread_count_middle() const
+ { return this->thread_count_middle_; }
+
+ // --thread-count-final: Threads to use in final pass.
+ int
+ thread_count_final() const
+ { return this->thread_count_final_; }
+
+ // -z execstack, -z noexecstack
+ bool
+ is_execstack_set() const
+ { return this->execstack_ != EXECSTACK_FROM_INPUT; }
+
+ bool
+ is_stack_executable() const
+ { return this->execstack_ == EXECSTACK_YES; }
+
+ // --debug
+ unsigned int
+ debug() const
+ { return this->debug_; }
+
+ // Return the options which may be set from a linker script.
+ Script_options*
+ script_options()
+ { return this->script_options_; }
+
+ const Script_options*
+ script_options() const
+ { return this->script_options_; }
+
private:
// Don't copy this structure.
General_options(const General_options&);
friend class Command_line;
friend class options::Command_line_options;
+ // Which symbols to strip.
+ enum Strip
+ {
+ // Don't strip any symbols.
+ STRIP_NONE,
+ // Strip all symbols.
+ STRIP_ALL,
+ // Strip debugging information.
+ STRIP_DEBUG,
+ // Strip debugging information that's not used by gdb (at least <= 6.7)
+ STRIP_DEBUG_UNUSED_BY_GDB
+ };
+
+ // 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
+ };
+
+ // What compression method to use
+ enum CompressionMethod
+ {
+ NO_COMPRESSION,
+ ZLIB_COMPRESSION,
+ };
+
+ void
+ set_entry(const char* arg)
+ { this->script_options_->set_entry(arg, strlen(arg)); }
+
+ void
+ set_export_dynamic()
+ { this->export_dynamic_ = true; }
+
+ void
+ set_soname(const char* arg)
+ { this->soname_ = arg; }
+
void
set_dynamic_linker(const char* arg)
{ this->dynamic_linker_ = arg; }
void
add_to_search_path(const char* arg)
- { this->search_path_.push_back(arg); }
+ { this->search_path_.push_back(Search_directory(arg, false)); }
+
+ void
+ add_to_search_path_with_sysroot(const char* arg)
+ { this->search_path_.push_back(Search_directory(arg, true)); }
+
+ void
+ set_optimization_level(const char* arg)
+ {
+ char* endptr;
+ this->optimization_level_ = strtol(arg, &endptr, 0);
+ if (*endptr != '\0' || this->optimization_level_ < 0)
+ gold_fatal(_("invalid optimization level: %s"), arg);
+ }
void
set_output_file_name(const char* arg)
{ this->is_relocatable_ = true; }
void
+ set_strip_all()
+ { this->strip_ = STRIP_ALL; }
+
+ // 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; }
+
+ void
+ set_strip_debug_gdb()
+ { this->strip_ = STRIP_DEBUG_UNUSED_BY_GDB; }
+
+ void
+ set_allow_shlib_undefined()
+ { this->allow_shlib_undefined_ = true; }
+
+ void
+ set_no_allow_shlib_undefined()
+ { this->allow_shlib_undefined_ = false; }
+
+ void
+ set_symbolic()
+ { this->symbolic_ = true; }
+
+ void set_compress_debug_sections(const char* arg)
+ {
+ if (strcmp(arg, "none") == 0)
+ this->compress_debug_sections_ = NO_COMPRESSION;
+#ifdef HAVE_ZLIB_H
+ else if (strcmp(arg, "zlib") == 0)
+ this->compress_debug_sections_ = ZLIB_COMPRESSION;
+#endif
+ else
+ gold_fatal(_("unsupported argument to --compress-debug-sections: %s"),
+ arg);
+ }
+
+ void
+ define_symbol(const char* arg);
+
+ void
+ set_demangle()
+ { this->demangle_ = true; }
+
+ void
+ clear_demangle()
+ { this->demangle_ = false; }
+
+ void
+ set_detect_odr_violations()
+ { this->detect_odr_violations_ = true; }
+
+ void
+ set_create_eh_frame_hdr()
+ { this->create_eh_frame_hdr_ = true; }
+
+ void
add_to_rpath(const char* arg)
- { this->rpath_.push_back(arg); }
+ { this->rpath_.push_back(Search_directory(arg, false)); }
+
+ void
+ add_to_rpath_link(const char* arg)
+ { this->rpath_link_.push_back(Search_directory(arg, false)); }
void
set_shared()
{ this->is_static_ = true; }
void
+ set_stats()
+ { this->print_stats_ = true; }
+
+ void
+ set_sysroot(const char* arg)
+ { this->sysroot_ = arg; }
+
+ 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)
+ gold_fatal(_("invalid argument to -Ttext: %s"), arg);
+ }
+
+ int
+ parse_thread_count(const char* arg)
+ {
+ char* endptr;
+ const int count = strtol(arg, &endptr, 0);
+ if (*endptr != '\0' || count < 0)
+ gold_fatal(_("invalid thread count: %s"), arg);
+ return count;
+ }
+
+ void
+ set_threads()
+ {
+#ifndef ENABLE_THREADS
+ gold_fatal(_("--threads not supported"));
+#endif
+ this->threads_ = true;
+ }
+
+ void
+ clear_threads()
+ { this->threads_ = false; }
+
+ void
+ set_thread_count(const char* arg)
+ {
+ int count = this->parse_thread_count(arg);
+ this->thread_count_initial_ = count;
+ this->thread_count_middle_ = count;
+ this->thread_count_final_ = count;
+ }
+
+ void
+ set_thread_count_initial(const char* arg)
+ { this->thread_count_initial_ = this->parse_thread_count(arg); }
+
+ void
+ set_thread_count_middle(const char* arg)
+ { this->thread_count_middle_ = this->parse_thread_count(arg); }
+
+ void
+ set_thread_count_final(const char* arg)
+ { this->thread_count_final_ = this->parse_thread_count(arg); }
+
+ void
ignore(const char*)
{ }
+ void
+ set_execstack()
+ { this->execstack_ = EXECSTACK_YES; }
+
+ void
+ set_noexecstack()
+ { this->execstack_ = EXECSTACK_NO; }
+
+ void
+ set_debug(unsigned int flags)
+ { this->debug_ = flags; }
+
+ // Handle the -z option.
+ void
+ handle_z_option(const char*);
+
+ // Handle the --debug option.
+ void
+ handle_debug_option(const char*);
+
+ // Apply any sysroot to the directory lists.
+ void
+ add_sysroot();
+
+ bool export_dynamic_;
+ const char* soname_;
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_;
+ CompressionMethod compress_debug_sections_;
+ bool demangle_;
+ 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_;
+ unsigned int debug_;
+ // Some options can also be set from linker scripts. Those are
+ // stored here.
+ Script_options* script_options_;
};
// The current state of the position dependent options.
public:
Position_dependent_options();
- // -Bstatic: Whether we are searching for a static archive rather
- // than a shared object.
+ // -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_; }
class Input_file_argument
{
public:
+ // 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
+ // 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.
+ // options: The position dependent options at this point in the
+ // command line, such as --whole-archive.
Input_file_argument()
- : name_(), is_lib_(false), options_()
+ : name_(), is_lib_(false), extra_search_path_(""), options_()
{ }
Input_file_argument(const char* name, bool is_lib,
+ const char* extra_search_path,
const Position_dependent_options& options)
- : name_(name), is_lib_(is_lib), options_(options)
+ : name_(name), is_lib_(is_lib), extra_search_path_(extra_search_path),
+ options_(options)
{ }
const char*
is_lib() const
{ return this->is_lib_; }
+ const char*
+ extra_search_path() const
+ {
+ return (this->extra_search_path_.empty()
+ ? NULL
+ : this->extra_search_path_.c_str());
+ }
+
+ // 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(); }
+
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_;
+ std::string extra_search_path_;
Position_dependent_options options_;
};
in_group() const
{ return this->in_group_; }
+ // The number of entries in the list.
+ int
+ size() const
+ { return this->input_argument_list_.size(); }
+
// Iterators to iterate over the list of input files.
const_iterator
public:
typedef Input_arguments::const_iterator const_iterator;
- Command_line();
+ Command_line(Script_options*);
// 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 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.
int
- process_l_option(int, char**, char*);
+ process_l_option(int, char**, char*, bool);
// Handle a --start-group option.
void
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);
+
// Get the general options.
const General_options&
options() const
{ return this->options_; }
+ // Get the position dependent options.
+ const Position_dependent_options&
+ position_dependent_options() const
+ { return this->position_options_; }
+
+ // Get the options which may be set from a linker script.
+ Script_options*
+ script_options()
+ { return this->options_.script_options(); }
+
+ const Script_options*
+ script_options() const
+ { return this->options_.script_options(); }
+
+ // The number of input files.
+ int
+ number_of_input_files() const
+ { return this->inputs_.size(); }
+
// Iterators to iterate over the list of input files.
const_iterator
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();
+
General_options options_;
Position_dependent_options position_options_;
Input_arguments inputs_;
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