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// parameters.h -- general parameters for a link using 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.
#ifndef GOLD_PARAMETERS_H
#define GOLD_PARAMETERS_H
namespace gold
{
class General_options;
class Errors;
class Target;
// Here we define the Parameters class which simply holds simple
// general parameters which apply to the entire link. We use a global
// variable for this. The parameters class holds three types of data:
// 1) An Errors struct. Any part of the code that wants to log an
// error can use parameters->errors().
// 2) A const General_options. These are the options as read on
// the commandline.
// 3) Target information, such as size and endian-ness. This is
// available as soon as we've decided on the Target (after
// parsing the first .o file).
// 4) Whether we're doing a static link or not. This is set
// after all inputs have been read and we know if any is a
// dynamic library.
class Parameters
{
public:
Parameters()
: errors_(NULL), options_(NULL), target_(NULL),
doing_static_link_valid_(false), doing_static_link_(false),
debug_(0)
{ }
// These should be called as soon as they are known.
void
set_errors(Errors* errors);
void
set_options(const General_options* options);
void
set_target(const Target* target);
void
set_doing_static_link(bool doing_static_link);
// Return the error object.
Errors*
errors() const
{ return this->errors_; }
// Whether the options are valid. This should not normally be
// called, but it is needed by gold_exit.
bool
options_valid() const
{ return this->options_ != NULL; }
// Return the options object.
const General_options&
options() const
{
gold_assert(this->options_valid());
return *this->options_;
}
// Return whether the target field has been set.
bool
target_valid() const
{ return this->target_ != NULL; }
// The target of the output file we are generating.
const Target&
target() const
{
gold_assert(this->target_valid());
return *this->target_;
}
// When we don't have an output file to associate a target, make a
// default one, with guesses about size and endianness.
const Target&
default_target() const;
// Return true if TARGET is compatible with the current target.
bool
is_compatible_target(const Target*) const;
bool
doing_static_link() const
{
gold_assert(this->doing_static_link_valid_);
return this->doing_static_link_;
}
// This is just a copy of options().debug(). We make a copy so we
// don't have to #include options.h in order to inline
// is_debugging_enabled, below.
int
debug() const
{
// This can be called before the options are set up.
if (!this->options_valid())
return 0;
return debug_;
}
// A convenience routine for combining size and endianness. It also
// checks the HAVE_TARGET_FOO configure options and dies if the
// current target's size/endianness is not supported according to
// HAVE_TARGET_FOO. Otherwise it returns this enum
enum Target_size_endianness
{ TARGET_32_LITTLE, TARGET_32_BIG, TARGET_64_LITTLE, TARGET_64_BIG };
Target_size_endianness
size_and_endianness() const;
private:
Errors* errors_;
const General_options* options_;
const Target* target_;
bool doing_static_link_valid_;
bool doing_static_link_;
int debug_;
};
// This is a global variable.
extern const Parameters* parameters;
// We use free functions for these since they affect a global variable
// that is internal to parameters.cc.
extern void
set_parameters_errors(Errors* errors);
extern void
set_parameters_options(const General_options* options);
extern void
set_parameters_target(const Target* target);
extern void
set_parameters_doing_static_link(bool doing_static_link);
// Return whether we are doing a particular debugging type. The
// argument is one of the flags from debug.h.
inline bool
is_debugging_enabled(unsigned int type)
{ return (parameters->debug() & type) != 0; }
} // End namespace gold.
#endif // !defined(GOLD_PARAMETERS_H)
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