gold/parameters.h

   1 // parameters.h -- general parameters for a link using gold  -*- C++ -*-
   2
   3 // Copyright 2006, 2007 Free Software Foundation, Inc.
   4 // Written by Ian Lance Taylor <iant@google.com>.
   5
   6 // This file is part of gold.
   7
   8 // This program is free software; you can redistribute it and/or modify
   9 // it under the terms of the GNU General Public License as published by
  10 // the Free Software Foundation; either version 3 of the License, or
  11 // (at your option) any later version.
  12
  13 // This program is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the Free Software
  20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21 // MA 02110-1301, USA.
  22
  23 #ifndef GOLD_PARAMETERS_H
  24 #define GOLD_PARAMETERS_H
  25
  26 namespace gold
  27 {
  28
  29 class General_options;
  30
  31 // Here we define the Parameters class which simply holds simple
  32 // general parameters which apply to the entire link.  We use a global
  33 // variable for this.  This is in contrast to the General_options
  34 // class, which holds the complete state of position independent
  35 // command line options.  The hope is that Parameters will stay fairly
  36 // simple, so that if this turns into a library it will be clear how
  37 // these parameters should be set.
  38
  39 class Parameters
  40 {
  41  public:
  42   Parameters(const General_options*);
  43
  44   // Whether we are generating a regular executable.
  45   bool
  46   output_is_executable() const
  47   { return this->output_file_type_ == OUTPUT_EXECUTABLE; }
  48
  49   // Whether we are generating a shared library.
  50   bool
  51   output_is_shared() const
  52   { return this->output_file_type_ == OUTPUT_SHARED; }
  53
  54   // Whether we are generating an object file.
  55   bool
  56   output_is_object() const
  57   { return this->output_file_type_ == OUTPUT_OBJECT; }
  58
  59   // Whether we are doing a static link--a link in which none of the
  60   // input files are shared libraries.  This is only known after we
  61   // have seen all the input files.
  62   bool
  63   doing_static_link() const
  64   {
  65     gold_assert(this->is_doing_static_link_valid_);
  66     return this->doing_static_link_;
  67   }
  68
  69   // The size of the output file we are generating.  This should
  70   // return 32 or 64.
  71   int
  72   get_size() const
  73   {
  74     gold_assert(this->is_size_and_endian_valid_);
  75     return this->size_;
  76   }
  77
  78   // Whether the output is big endian.
  79   bool
  80   is_big_endian() const
  81   {
  82     gold_assert(this->is_size_and_endian_valid_);
  83     return this->is_big_endian_;
  84   }
  85
  86   // The general linker optimization level.
  87   int
  88   optimization_level() const
  89   { return this->optimization_level_; }
  90
  91   // Set whether we are doing a static link.
  92   void
  93   set_doing_static_link(bool doing_static_link);
  94
  95   // Set the size and endianness.
  96   void
  97   set_size_and_endianness(int size, bool is_big_endian);
  98
  99  private:
 100   // The types of output files.
 101   enum Output_file_type
 102     {
 103       // Generating executable.
 104       OUTPUT_EXECUTABLE,
 105       // Generating shared library.
 106       OUTPUT_SHARED,
 107       // Generating object file.
 108       OUTPUT_OBJECT
 109     };
 110
 111   // The type of the output file.
 112   Output_file_type output_file_type_;
 113   // Whether the doing_static_link_ field is valid.
 114   bool is_doing_static_link_valid_;
 115   // Whether we are doing a static link.
 116   bool doing_static_link_;
 117   // Whether the size_ and is_big_endian_ fields are valid.
 118   bool is_size_and_endian_valid_;
 119   // The size of the output file--32 or 64.
 120   int size_;
 121   // Whether the output file is big endian.
 122   bool is_big_endian_;
 123   // The optimization level.
 124   int optimization_level_;
 125 };
 126
 127 // This is a global variable.
 128 extern const Parameters* parameters;
 129
 130 // Initialize the global variable.
 131 extern void initialize_parameters(const General_options*);
 132
 133 // Set the size and endianness of the global parameters variable.
 134 extern void set_parameters_size_and_endianness(int size, bool is_big_endian);
 135
 136 // Set whether we are doing a static link.
 137 extern void set_parameters_doing_static_link(bool doing_static_link);
 138
 139 } // End namespace gold.
 140
 141 #endif // !defined(GOLD_PARAMATERS_H)