    # File ext/RMagick/extconf.rb, line 13
    def have_enum_value(enum, value, headers=nil, &b)
      checking_for "#{enum}.#{value}" do
        if try_compile("\#{COMMON_HEADERS}\n\#{cpp_include(headers)}\n/*top*/\nint main() { \#{enum} t = \#{value}; t = t; return 0; }\n", &b)
          $defs.push(format("-DHAVE_ENUM_%s", value.upcase))
          true
        else
          false
        end
      end
    end