lib/voodoo/config.rb.in

   1 #! /usr/bin/env ruby
   2
   3 # Ruby program to generate config.rb
   4
   5 default_architecture = ENV['DEFAULT_ARCHITECTURE']
   6 default_format = ENV['DEFAULT_FORMAT']
   7 gas_command = ENV['GAS'] || 'as'
   8 nasm_command = ENV['NASM'] || ENV['YASM'] || 'nasm'
   9 version = open(File.join(File.dirname(__FILE__), '..', '..', 'VERSION')) { |f|
  10   f.read }
  11
  12 print <<EOT
  13 module Voodoo
  14   # Methods to get and set configuration parameters
  15   module Config
  16     IMPLEMENTATION_NAME = 'Voodoo Compiler'
  17     IMPLEMENTATION_VERSION = '#{version.chop}'
  18
  19     # Class that holds configuration parameters
  20     class Configuration
  21       def initialize
  22         @default_architecture = #{default_architecture.to_sym.inspect}
  23         @default_format = #{default_format.to_sym.inspect}
  24         @gas_command = #{gas_command.inspect}
  25         @nasm_command = #{nasm_command.inspect}
  26       end
  27
  28       attr_accessor :default_format,
  29                     :gas_command,
  30                     :nasm_command
  31
  32       attr_writer :default_architecture
  33
  34       # Returns the default architecture for this compiler
  35       def default_architecture
  36         if @default_architecture == :auto
  37           # If @default_architecture has been set to :auto,
  38           # return the host architecture, falling back to :i386
  39           # if the host architecture cannot be determined
  40           host_architecture || :i386
  41         else
  42           @default_architecture
  43         end
  44       end
  45
  46       # Returns the architecture of the machine running the program,
  47       # or nil if that architecture cannot be determined
  48       def host_architecture
  49         arch, = RUBY_PLATFORM.split '-'
  50         case arch
  51         when 'x86_64', 'amd64'
  52           :amd64
  53         when /^arm/
  54           :arm
  55         when 'i386', 'i686'
  56           :i386
  57         when 'mips'
  58           :mips
  59         when 'mipsel'
  60           :mipsel
  61         else
  62           nil
  63         end
  64       end
  65     end
  66
  67     DEFAULT_CONFIGURATION = Configuration.new
  68
  69     module_function
  70
  71 EOT
  72
  73 [:default_architecture,
  74  :default_format,
  75  :gas_command,
  76  :nasm_command
  77 ].each do |symbol|
  78     print <<EOT
  79     def #{symbol}
  80       DEFAULT_CONFIGURATION.#{symbol}
  81     end
  82
  83     def #{symbol}= value
  84       DEFAULT_CONFIGURATION.#{symbol} = value
  85     end
  86 EOT
  87 end
  88
  89 print <<EOT
  90   end
  91 end
  92 EOT