Article ID: 191669 - Last Review: October 3, 2005 - Revision: 3.2

You may receive an "error LNK2001 unresolved external symbol __chkesp" error message when you build a project with Visual C++ 6.0

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This article was previously published under Q191669

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SYMPTOMS

When building a project with Visual C++ 6.0, you may get the following linker error:
error LNK2001: unresolved external symbol __chkesp
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CAUSE

The new compiler stack-checking feature requires you to link with the C run-time library.
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RESOLUTION

Either link with one of the C run-time libraries or disable the compiler stack-checking feature (remove /GZ from the compiler switches).
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STATUS

This behavior is by design.
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MORE INFORMATION

Steps to reproduce the behavior

Sample code

   // test.cpp
   // compile with: cl /GZ test.cpp /link /nod
   void f() {}
   int main ()
   {
      f();
      return 0;
   }
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APPLIES TO
  • The C Run-Time (CRT), when used with:
    • Microsoft Visual C++ 6.0 Enterprise Edition
    • Microsoft Visual C++ 6.0 Professional Edition
    • Microsoft Visual C++, 32-bit Learning Edition 6.0
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Keywords: 
kbtshoot kberrmsg kbcompiler kbprb KB191669
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