Unresolved external symbol static variable (variable used by method defined in header)

Question

Here is the .h:

class Logger
{
private:
    static int mTresholdSeverity;

public:
    static __declspec(dllexport) void log(const char* message);
    static         


        

Answer 1

The problem is that mThresholdSeverity is not exported from the DLL, but the two accessors are defined inline, so wherever they're called they have to be able to see mThresholdSeverity. There are two solutions: either export mThresholdSeverity from the DLL (sorry, I don't remember how to do that off the top of my head), or make the accessors non-inline functions, define them in the DLL, and export them from the DLL.