[libcxx-commits] [libcxx] [libc++] Simplify the implementation of <stddef.h> (PR #86843)

[Nico Weber via libcxx-commits]

nico wrote:

Here's another thing that happened to work before but breaks now (…but somehow only on Windows):

```
namespace mynamespace {
#include <stddef.h>
}
```

(Details: https://crbug.com/333934598)

That's of course something you shouldn't do, but since it used to work, there's code out there that does it. Not a ton as far as I can tell, but I thought I'd mention it. (No action needed.)

https://github.com/llvm/llvm-project/pull/86843