Losing preprocessor defintion after generating first temporary file

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From: Sachin Sharma (sachinssharma_at_hotmail.com)
Date: 11/20/04

  • Next message: Sachin Sharma: "Re: Losing preprocessor defintion after generating first temporary file" 
    Date: Sat, 20 Nov 2004 18:30:02 +0530

    Hello,

    I have a regular DLL using Win32 APIs that I compile with Visual C++.NET
    2003. In one of the files, say "d.cpp", I have this code:

    #if defined(PRE_ID)
    char* pszID = "12345";
    #else
    char* pszID = NULL;
    #endif

    Now, I have two release configurations. Same in all other settings, except
    that the new configuration contains PRE_ID in Project > Properties > C/C++ >
    Preprocessor > Preprocessor Definitions. When I compile the new
    configuration, I get char* pszID = NULL and not the other declaration as
    expected.

    The build log shows that first the compiler creates a temporary files then
    compiles a few files, then another temporary file and compiles only
    stdafx.cpp. Finally a third temporary file where it compiles our "d.cpp".
    The first temporary file shows /D "PRE_ID" as part of the command line but
    the second and the third does not.

    To confirm this, if I put the above mentioned code in the first file that
    compiles as part of the first temporary file then everything works as
    expected. So I have a workaround. But why this behavior?

    In addition, it is interesting to note that the order of compilation is in
    descending order of file names (Z to A) - in this case at least.

    Please help.

    Regards,
    Sachin Sharma

  • Next message: Sachin Sharma: "Re: Losing preprocessor defintion after generating first temporary file"

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