method

try_const

v1_9_3_125 - Show latest stable - Class: Object

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 1078
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

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