321 lines
8.4 KiB
C++
321 lines
8.4 KiB
C++
// parameters.h -- general parameters for a link using gold -*- C++ -*-
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// Copyright 2006, 2007 Free Software Foundation, Inc.
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// Written by Ian Lance Taylor <iant@google.com>.
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// This file is part of gold.
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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// MA 02110-1301, USA.
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#ifndef GOLD_PARAMETERS_H
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#define GOLD_PARAMETERS_H
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namespace gold
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{
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class General_options;
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class Errors;
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// Here we define the Parameters class which simply holds simple
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// general parameters which apply to the entire link. We use a global
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// variable for this. This is in contrast to the General_options
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// class, which holds the complete state of position independent
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// command line options. The hope is that Parameters will stay fairly
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// simple, so that if this turns into a library it will be clear how
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// these parameters should be set.
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class Parameters
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{
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public:
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Parameters(Errors*);
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// Return the error object.
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Errors*
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errors() const
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{ return this->errors_; }
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// Whether to use threads.
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bool
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threads() const
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{
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gold_assert(this->options_valid_);
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return this->threads_;
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}
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// Return the output file name.
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const char*
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output_file_name() const
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{
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gold_assert(this->options_valid_);
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return this->output_file_name_;
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}
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// Whether we are generating a regular executable.
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bool
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output_is_executable() const
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{
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gold_assert(this->output_file_type_ != OUTPUT_INVALID);
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return this->output_file_type_ == OUTPUT_EXECUTABLE;
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}
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// Whether we are generating a shared library.
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bool
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output_is_shared() const
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{
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gold_assert(this->output_file_type_ != OUTPUT_INVALID);
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return this->output_file_type_ == OUTPUT_SHARED;
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}
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// Whether we are generating an object file.
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bool
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output_is_object() const
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{
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gold_assert(this->output_file_type_ != OUTPUT_INVALID);
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return this->output_file_type_ == OUTPUT_OBJECT;
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}
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// Whether we are generating position-independent output.
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// This is the case when generating either a shared library
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// or a regular executable with the --pic-executable option.
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// FIXME: support --pic-executable
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bool
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output_is_position_independent() const
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{ return output_is_shared(); }
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// The target system root directory. This is NULL if there isn't
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// one.
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const std::string&
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sysroot() const
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{
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gold_assert(this->options_valid_);
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return this->sysroot_;
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}
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// Whether to strip all symbols.
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bool
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strip_all() const
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{
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gold_assert(this->strip_ != STRIP_INVALID);
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return this->strip_ == STRIP_ALL;
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}
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// Whether to strip debugging information.
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bool
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strip_debug() const
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{
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gold_assert(this->strip_ != STRIP_INVALID);
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return this->strip_ == STRIP_ALL || this->strip_ == STRIP_DEBUG;
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}
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// Whether to strip debugging information that's not used by gdb.
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bool
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strip_debug_gdb() const
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{
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gold_assert(this->strip_ != STRIP_INVALID);
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return this->strip_debug() || this->strip_ == STRIP_DEBUG_UNUSED_BY_GDB;
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}
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// Whether to permit unresolved references from shared libraries.
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bool
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allow_shlib_undefined() const
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{
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gold_assert(this->options_valid_);
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return this->allow_shlib_undefined_;
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}
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// Whether we are doing a symbolic link, in which all defined
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// symbols are bound locally.
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bool
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symbolic() const
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{
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gold_assert(this->options_valid_);
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return this->symbolic_;
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}
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// Whether we should demangle C++ symbols in our log messages.
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bool
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demangle() const
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{ return this->demangle_; }
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// Whether we should try to detect violations of the One Definition Rule.
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bool
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detect_odr_violations() const
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{
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gold_assert(this->options_valid_);
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return this->detect_odr_violations_;
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}
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// The general linker optimization level.
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int
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optimization_level() const
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{
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gold_assert(this->options_valid_);
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return this->optimization_level_;
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}
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// Whether the -E/--export-dynamic flag is set.
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bool
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export_dynamic() const
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{
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gold_assert(this->options_valid_);
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return this->export_dynamic_;
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}
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// Return the debug flags. These are the flags for which we should
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// report internal debugging information.
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unsigned int
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debug() const
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{
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gold_assert(this->options_valid_);
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return this->debug_;
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}
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// Whether we are doing a static link--a link in which none of the
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// input files are shared libraries. This is only known after we
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// have seen all the input files.
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bool
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doing_static_link() const
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{
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gold_assert(this->is_doing_static_link_valid_);
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return this->doing_static_link_;
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}
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// The size of the output file we are generating. This should
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// return 32 or 64.
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int
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get_size() const
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{
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gold_assert(this->is_size_and_endian_valid_);
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return this->size_;
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}
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// Whether the output is big endian.
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bool
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is_big_endian() const
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{
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gold_assert(this->is_size_and_endian_valid_);
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return this->is_big_endian_;
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}
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// Set values recorded from options.
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void
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set_from_options(const General_options*);
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// Set whether we are doing a static link.
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void
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set_doing_static_link(bool doing_static_link);
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// Set the size and endianness.
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void
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set_size_and_endianness(int size, bool is_big_endian);
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private:
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// The types of output files.
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enum Output_file_type
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{
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// Uninitialized.
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OUTPUT_INVALID,
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// Generating executable.
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OUTPUT_EXECUTABLE,
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// Generating shared library.
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OUTPUT_SHARED,
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// Generating object file.
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OUTPUT_OBJECT
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};
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// Which symbols to strip.
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enum Strip
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{
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// Uninitialize.
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STRIP_INVALID,
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// Don't strip any symbols.
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STRIP_NONE,
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// Strip all symbols.
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STRIP_ALL,
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// Strip debugging information.
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STRIP_DEBUG,
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// Strip debugging information that's not used by gdb (at least <= 6.7)
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STRIP_DEBUG_UNUSED_BY_GDB
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};
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// A pointer to the error handling object.
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Errors* errors_;
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// Whether the fields set from the options are valid.
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bool options_valid_;
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// Whether to use threads.
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bool threads_;
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// The output file name.
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const char* output_file_name_;
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// The type of the output file.
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Output_file_type output_file_type_;
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// The target system root directory.
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std::string sysroot_;
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// Which symbols to strip.
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Strip strip_;
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// Whether to allow undefined references from shared libraries.
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bool allow_shlib_undefined_;
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// Whether we are doing a symbolic link.
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bool symbolic_;
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// Whether we should demangle C++ symbols in our log messages.
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bool demangle_;
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// Whether we try to detect One Definition Rule violations.
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bool detect_odr_violations_;
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// The optimization level.
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int optimization_level_;
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// Whether the -E/--export-dynamic flag is set.
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bool export_dynamic_;
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// The debug flags.
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unsigned int debug_;
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// Whether the doing_static_link_ field is valid.
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bool is_doing_static_link_valid_;
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// Whether we are doing a static link.
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bool doing_static_link_;
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// Whether the size_ and is_big_endian_ fields are valid.
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bool is_size_and_endian_valid_;
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// The size of the output file--32 or 64.
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int size_;
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// Whether the output file is big endian.
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bool is_big_endian_;
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};
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// This is a global variable.
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extern const Parameters* parameters;
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// Initialize the global variable.
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extern void initialize_parameters(Errors*);
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// Set the options.
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extern void set_parameters_from_options(const General_options*);
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// Set the size and endianness of the global parameters variable.
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extern void set_parameters_size_and_endianness(int size, bool is_big_endian);
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// Set whether we are doing a static link.
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extern void set_parameters_doing_static_link(bool doing_static_link);
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// Return whether we are doing a particular debugging type. The
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// argument is one of the flags from debug.h.
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inline bool
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is_debugging_enabled(unsigned int type)
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{ return (parameters->debug() & type) != 0; }
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} // End namespace gold.
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#endif // !defined(GOLD_PARAMETERS_H)
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