Q127900: BUG: C2487 Error Occurs If Multiple Static Vars Use dllexport

Article: Q127900
Product(s): Microsoft C Compiler
Version(s): winnt:2.0,2.1,4.0,4.1,4.2,5.0,6.0
Operating System(s): 
Keyword(s): kbLangCPP kbVC kbVC500bug
Last Modified: 06-MAY-2001

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The information in this article applies to:

- The C/C++ Compiler (CL.EXE), used with:
   - Microsoft Visual C++, 32-bit Editions, versions 2.0, 2.1, 4.0, 4.1 
   - Microsoft Visual C++, 32-bit Enterprise Edition, version 4.2 
   - Microsoft Visual C++, 32-bit Professional Edition, version 4.2 
   - Microsoft Visual C++, 32-bit Enterprise Edition, version 5.0 
   - Microsoft Visual C++, 32-bit Professional Edition, version 5.0 
   - Microsoft Visual C++, 32-bit Enterprise Edition, version 6.0 
   - Microsoft Visual C++, 32-bit Professional Edition, version 6.0 
   - Microsoft Visual C++, 32-bit Learning Edition, version 6.0 
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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;
  };

This class declaration generates these errors:

  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.

Additional query words: kbVC400bug dllimport export afxdll 9.00 9.10 10.00 10.10 10.20

======================================================================
Keywords          : kbLangCPP kbVC kbVC500bug 
Technology        : kbVCsearch kbAudDeveloper kbCVCComp
Version           : winnt:2.0,2.1,4.0,4.1,4.2,5.0,6.0
Issue type        : kbbug

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