# File lib/childprocess/tools/generator.rb, line 69
      def fetch_constant(name, opts)
        print "#{name}: "
        src = "int main() {\nprintf(\"%d\", (unsigned int)\#{name});\nreturn 0;\n}\n"

        output = execute(src, opts)
        value  = Integer(output)
        @constants[name] = value

        puts value
      end