[Issue 16289] no extern(C++) mangling for size_t/unsigned long parameters

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=16289

--- Comment #1 from Martin Nowak <code at dawg.eu> ---
It's possible to use cpp_ulong which get's the correct mangling, but it's
fairly unfriendly to use.
https://github.com/dlang/druntime/blob/fb0dafb741d33ae030c2e7a96bee2c61aa4d3cb4/src/core/stdc/config.d#L91

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