class Object

# File ext/json/ext/parser/extconf.rb, line 18
def have_builtin_func(name, check_expr, opt = "", &b)
  checking_for checking_message(name.funcall_style, nil, opt) do
    if try_compile(<<SRC, opt, &b)
int foo;
int main() { #{check_expr}; return 0; }
SRC
      $defs.push(format("-DHAVE_BUILTIN_%s", name.tr_cpp))
      true
    else
      false
    end
  end
end