How to export data to C

[romov]

I am trying to export a variable from an executable binary on Windows. E.g: 
    
    
    __declspec(dllexport) int MyVar = 5;
    

However simply decorating it with _exportc_ pragma doesn't seem to work. 
    
    
    let MyVar {.exportc.} : int = 5
    

How does one export variables in Nim?

P.S. For now I am using _emit_ workaround for this. 
    
    
    {.emit: """
    __declspec(dllexport) int MyVar = 5;
    """.}