Re: [PATCH v5 0/2] MR2045: d3d12core: Add stub DLL.

[Zebediah Figura (＠zfigura)]

> +DECLSPEC_EXPORT const UINT D3D12SDKVersion = D3D12_SDK_VERSION;

We don't use DECLSPEC_EXPORT.
> +@ cdecl D3D12SDKVersion()

This is wrong, it should be "@ extern D3D12SDKVersion".

This is one reason to avoid implementing features until they're needed.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/2045#note_22504