Knowledge Base

BUG: C2487 Error Occurs If Multiple Static Vars Use dllexport

Article ID: 127900

Article Last Modified on 7/5/2005

Microsoft Visual C++ 2.0 Professional Edition
Microsoft Visual C++ 2.1
Microsoft Visual C++ 4.0 Standard Edition
Microsoft Visual C++ 4.1 Subscription
Microsoft Visual C++ 4.2 Enterprise Edition
Microsoft Visual C++ 4.2 Professional Edition
Microsoft Visual C++ 5.0 Enterprise Edition
Microsoft Visual C++ 5.0 Professional Edition
Microsoft Visual C++ 6.0 Enterprise Edition
Microsoft Visual C++ 6.0 Professional Edition
Microsoft Visual C++ 6.0 Standard Edition

This article was previously published under Q127900

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 that this is a bug in the Microsoft products that are 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: kbbug kblangcpp KB127900