# File lib/mkmf.rb, line 439
def try_var(var, headers = nil, &b)
  headers = cpp_include(headers)
  try_compile("\#{COMMON_HEADERS}\n\#{headers}\n/*top*/\nint main() { return 0; }\nint t() { const volatile void *volatile p; p = &(&\#{var})[0]; return 0; }\n", &b)
end