max_align_t has been introduced by C++11 and C99Depend on the compiler to provide a correct implementation of
`max_align_t`. When an older languageIf `__STDCPP_NEW_ALIGNMENT`__ is missing and C++03 mode ishas
been explicitly requestedenabled, the system headers might not provide. Don't define it in this case unless other headers (<new>) depend on it.provide a minimal fallback in `<new>` as
alignment of the largest primitive types.