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Compiler Warning (level 1, Error) C4399

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'symbol' : per-process symbol should not be marked with __declspec(dllimport) when compiled with /clr:pure

Remarks

The /clr:pure compiler option is deprecated in Visual Studio 2015 and unsupported in Visual Studio 2017.

Data from a native image or an image with native and common language runtime (CLR) constructs can't be imported into a pure image. To resolve this warning, compile with /clr (not /clr:pure) or delete __declspec(dllimport).

This warning can be issued as an error. Use the warning pragma to disable or change the warning level.

Example

The following sample generates C4399.

// C4399.cpp
// compile with: /clr:pure /doc /W1 /c
__declspec(dllimport) __declspec(process) extern const int i;   // C4399