[CMake] Including an external object file (.o) into static shared library using MS Visual Studio generator

[David Cole]

Can you send your CMakeLists.txt file? Or at least copy/paste the
relevant portion of it so we can see how you're adding the file?

Actually, maybe you won't need to send us code...

It needs to be a "*.obj" file to work with the Visual Studio
generators. We use the file extension ".obj" to identify them as
object files.

If you copy it to a file name ending with ".obj" does it work?


On Thu, Feb 17, 2011 at 2:18 PM, Chatterjee, Shash
<schatterjee at camber.com> wrote:
> Hi David,
>
> I truly appreciate your willingness to help, and your prompt response.  Thanks a bunch!
>
> I just installed 2.8.4 and tried again.  As far as I can tell, the behavior did not change (I deleted the CMake-2.8.3 generated build directory, as well as uninstalling CMake-2.8.3).  I still see the <ClInstall> element for the .o file, and it does not get included in the library.
>
> Thanks,
> Shash
>
>
> -----Original Message-----
> From: David Cole [mailto:david.cole at kitware.com]
> Sent: Thursday, February 17, 2011 12:23 PM
> To: Chatterjee, Shash
> Cc: cmake at cmake.org
> Subject: Re: [CMake] Including an external object file (.o) into static shared library using MS Visual Studio generator
>
> This was a known bug, and has been fixed in CMake 2.8.4.
>
> See here for details if you want:
> http://public.kitware.com/Bug/view.php?id=11459
>
> Upgrade to CMake 2.8.4 and try again. Should work....
>
>
> Cheers,
> David
>
>
> On Thu, Feb 17, 2011 at 12:59 PM, Chatterjee, Shash
> <schatterjee at camber.com> wrote:
>> Hi!
>>
>>
>>
>> I need to include a 3rd-party API, which comes without source, as an object
>> (.o) file into a static library using CMake 2.8.3.  I know it is possible to
>> add the .o when executables are linked, but that is not the preferred
>> method.
>>
>>
>>
>> I have simply defined the .o file in the ADD_LIBRARY command.  This works
>> under linux, and nmake (MS Visual Studio 10 /2010).  If I look in the
>> cmake-generated build.make, CMake correctly recognizes the .o as an external
>> dependency and defines a <libname>_EXTERNAL_OBJECTS variable in there, and
>> it is listed at the tail end of objects1.rsp.  So far, so good!
>>
>>
>>
>> When using the "Visual Studio 10" generator, CMake adds the object file as a
>> <ClInclude Include="....."/> XML element under a <ItemGroup> element that also
>> lists all the source files as <ClCompile> elements for the static library
>> project.  Of course the .o is not include in the lib when the project is
>> built.  I can manually go into the project properties, and add it as an
>> "Additional Dependencies" dependency for the Librarian, and that works.  Is
>> there a way to get CMake to do this automatically?
>>
>>
>>
>> Thanks,
>>
>> Shash
>>
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