BUG: C2487 Error Occurs If Multiple Static Vars Use dllexport

• The Microsoft C/C++ Compiler (CL.EXE) included with: - Microsoft Visual C++, 32-bit Edition, versions 2.0, 2.1, 4.0, 4.1,

       4.2, 5.0
  

SYMPTOMS

Using _declspec(dllexport) or _declspec(dllimport) on a class with multiple static variable definitions may cause a C2487 error to be generated on all but the first variable. For example, consider this class declaration:

   class _declspec(dllexport) MyClass
   {
   public:
     static int i,j,k;
   };

   error C2487: 'j' : member of dll interface class may not be declared
                      with dll interface
   error C2487: 'k' : member of dll interface class may not be declared
                      with dll interface

RESOLUTION

Move each static variable declaration to its own line. To fix the above class so that it will compile cleanly, use this:

   class _declspec(dllexport) MyClass
   {
   public:
     static int i;
     static int j;
     static int k;
   };

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.