FOLLY_NAMESPACE_STD_BEGIN
-#if _LIBCPP_VERSION < 4000 && !FOLLY_SKIP_LIBCPP_4000_THROW_BACKPORTS
+#if _LIBCPP_VERSION < 4000
void __throw_length_error(char const* msg) {
throw std::length_error(msg);
}
FOLLY_NAMESPACE_STD_BEGIN
-#if _LIBCPP_VERSION < 4000 && !FOLLY_SKIP_LIBCPP_4000_THROW_BACKPORTS
+#if _LIBCPP_VERSION < 4000
[[noreturn]] void __throw_length_error(char const* msg); // @nolint
[[noreturn]] void __throw_logic_error(char const* msg);
[[noreturn]] void __throw_out_of_range(char const* msg);