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Q121889: PRB: Error C2858: Command-line Options Inconsistent

Article: Q121889
Product(s): Microsoft C Compiler
Version(s): 1.0,2.0,4.0,5.0,6.0
Operating System(s): 
Keyword(s): kbCompiler kbCPPonly kbVC kbVC100 kbVC200 kbVC400 kbVC500 kbVC600
Last Modified: 11-FEB-2002

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The information in this article applies to:

- The C/C++ Compiler (CL.EXE), included with:
   - Microsoft Visual C++, 32-bit Editions, versions 1.0, 2.0, 4.0, 5.0, 6.0 
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SYMPTOMS
========

When building a file from an existing application that uses precompiled header
files, the compiler produces the following error if the source drive letter has
changed:

  error C2858: command-line option 'program database name
  (/FdN:\test.pdb)' inconsistent with precompiled header,
  which used '/FdM:\test.pdb'

CAUSE
=====

The compiler stores and uses an absolute path to the precompiled header file,
not a relative path.

RESOLUTION
==========

Microsoft recommends that you rebuild an application when moving its source code
or when connecting with a different drive letter.

MORE INFORMATION
================

The following sample code demonstrates the behavior. If the two files shown
below are compiled from the M: drive and later TEST2.CPP is compiled from the N:
drive, the error will occur.

Sample Code
-----------

  /* Compile options needed: /Zi /Fp"test.pch" /Yc
     TEST1.CPP
  */ 

  #include <iostream.h>

  void main()
  {
  }

  /* Compile options needed: /Zi /Fp"test.pch" /Yu"iostream.h"
     TEST2.CPP
  */ 

  #include <iostream.h>

  void sub()
  {
  }

Additional query words: 9.00

======================================================================
Keywords          : kbCompiler kbCPPonly kbVC kbVC100 kbVC200 kbVC400 kbVC500 kbVC600 
Technology        : kbVCsearch kbAudDeveloper kbCVCComp
Version           : :1.0,2.0,4.0,5.0,6.0
Issue type        : kbprb

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