method

try_const

v2_4_6 - Show latest stable - 0 notes - Class: MakeMakefile

1_8_6_287
1_8_7_72
1_8_7_330
1_9_1_378
1_9_2_180
1_9_3_125
1_9_3_392
2_1_10 (0)
2_2_9 (0)
2_4_6 (0)
2_5_5 (0)
2_6_3 (0)
What's this?

try_const(const, headers = nil, opt = "", &b) public

Returns whether or not the constant const is defined.

See also have_const

# File lib/mkmf.rb, line 1258
  def try_const(const, headers = nil, opt = "", &b)
    const, type = *const
    if try_compile(#{cpp_include(headers)}/*top*/typedef #{type || 'int'} conftest_type;conftest_type conftestval = #{type ? '' : '(int)'}#{const};, opt, &b)
      $defs.push(format("-DHAVE_CONST_%s", const.tr_cpp))
      true
    else
      false
    end
  end

try_const

Related methods