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Compiler Error C3862

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'function': cannot compile an unmanaged function with /clr:pure or /clr:safe

Remarks

The /clr:pure and /clr:safe compiler options are deprecated in Visual Studio 2015 and unsupported in Visual Studio 2017.

A compilation with /clr:pure or /clr:safe will produce an MSIL only image, an image with no native (unmanaged) code. Therefore, you cannot use the unmanaged pragma in a /clr:pure or /clr:safe compilation.

For more information, see /clr (Common Language Runtime Compilation) and managed, unmanaged.

Example

The following sample generates C3862:

// C3862.cpp
// compile with: /clr:pure /c
#pragma unmanaged
void f() {}   // C3862