KB102697 - An attempt to create a debugging library that uses precompiled headers may fail, and fatal build errors may be generated

SYMPTOMS

CVPACK : fatal error CK1017: cannot find precompiled types file; relink with file.obj
LINK : warning LNK4027: CVPACK error

LINK : fatal error LNK1211: precompiled type information not found; "<filename>" not linked or overwritten

Note

You may receive the following error message in the Watch window:

CXX0033:Error:error in OMF type information

While expanding a class object, you may see only blank entries for the class members.

RESOLUTION

Specify the /Yd compiler option switch to add the CodeView information from the precompiled header to each object module. This method is less desirable because it generally produces large object modules that can increase the time required to link the application.

Note The following work-around is for 32-bit versions only. Specify the /Yl<symbol> compiler option switch, where <symbol> is the name of an arbitrary symbol in the library, when you create a precompiled header file that does not contain any function definitions. This switch directs the compiler to store the debugging information in the precompiled header file.

MORE INFORMATION

When you compile a module with the /Yc and /Yl<symbol_name> option switches using the 32-bit edition, the compiler creates a symbol similar to __@@_PchSym_@00@...@<symbol_name>, where the ellipsis (...) represents a linker generated character string, and stores it in the object module. Any source file that you compile with this precompiled header refers to the specified symbol, which causes the linker to include the object module and its debugging information from the library.

The following code example demonstrates the problem.

Sample code

   /*

    * To demonstrate this problem, perform the following five steps:
    *
    * 1. Compile TEST1.C as follows: cl /Yctest.h /Z7 /c TEST1.C
    * 2. Compile TEST2.C as follows: cl /Yutest.h /Z7 /c TEST2.C
    * 3. Build a library that contains TEST1.OBJ and TEST2.OBJ as
    *    follows: lib /out:test.lib test1.obj test2.obj
    * 4. Compile TEST3.C as follows: cl /Yutest.h /Z7 /c TEST3.C
    * 5. Link the application as follows:
    *       link /debugtype:cv /debug:notmapped,full test3.obj test.lib
    *
    * To correct this problem, do one of the following:
    *
    *   1. 32-bit only)  Compile TEST1.C in step 1 as follows:
    *        cl /Yctest.h /YlAnyName /Z7 /c TEST1.C
    *      Then, repeat step 2 through 5.
    *
    *   2. Repeat steps 1 through 5, adding the /Yd command line option
    *      to steps 1, 2, and 4.

    */

TEST.H

   #include <stdio.h>

TEST1.C

   #include "test.h"

TEST2.C

   #include "test.h"

   void test2func(void)
   {
      printf("inside TEST2FUNC...\n");
   }

TEST3.C

   #include "test.h"

   void test2func(void);

   void main(void)
   {
      printf("inside MAIN...\n");
   }

An attempt to create a debugging library that uses precompiled headers may fail, and fatal build errors may be generated