On ARM platforms, `__dso_handle` is used for dynamic shared objects. But it is also required if global static objects are used. To avoid that `sys/cpp11_compat` is required only for using the (re)defined `new`/`delete` operators, `__dso_handle` is moved to module `sys/cpp_new_delete`
On some platforms `libstdc++` is not used or not available, like on the AVR. Such platforms can use this module to implement the C++ `new` and `delete` operators using `malloc` and `free` respectively. However, to be thread-safe, a thread-safe implementation of `malloc` and `free` must be present.
