[CMake] Incorrect code generated in DSP project file for IDL source file -- HELP!

[Brad King]

Bennett Smith wrote:
> Hello,
> 
> I am trying to use cmake for building a project on Windows. This
> project is currently built using Visual Studio 6.0, and it uses the
> ATL libraries to produce some COM components. Part of this is the
> invocation of the MIDL compiler to process a file with the .IDL
> extension.  When I add this file to the list of sources in the
> CMakeLists.txt file it seems to produce an incorrect section in the
> generated DSP file.
> 
> Here is what I want/expect:
> 
>  SOURCE=.\Echo.idl
>  # ADD MTL /tlb ".\Echo.tlb" /h "Echo.h" /iid "Echo_i.c" /Oicf
>  # End Source File
>  # Begin Source File
> 
> Here is what I actually get:
> 
>  SOURCE=D:\CMAKE_PRACTICE\SRC\Echo\Echo.idl
> 
>  !IF  "$(CFG)" == "Echo - Win32 Release"
> 
>  # ADD CPP /tlb
> 
>  !ELSEIF  "$(CFG)" == "Echo - Win32 Debug"
> 
>  # ADD CPP /tlb
> 
>  !ELSEIF  "$(CFG)" == "Echo - Win32 MinSizeRel"
> 
>  # ADD CPP /tlb
> 
>  !ELSEIF  "$(CFG)" == "Echo - Win32 RelWithDebInfo"
> 
>  # ADD CPP /tlb
> 
>  !ENDIF
> 
> Could someone please teach me the secret hand-shake to get cmake to
> generate a DSP file with correct entries for MIDL invocation?

I don't think CMake knows how to do that.  The VS6 generator is not as 
well-maintained as the others.  You can submit a feature request here:

http://www.cmake.org/Bug

but I don't know when there will be time to implement it.  If you want 
to try to patch CMake yourself look at 
Source/cmLocalVisualStudio6Generator.cxx to get started.  Just include 
the patch in the feature request if you get it working.

-Brad