[CMake] Building library with a collection of source + pre-existing object files (which are not compiled via the cmake build system)

[Nils Gladitz]

On 09.09.2014 17:02, Tom Kacvinsky wrote:
> Hi,
>
> I have not been able to find this in the cmake documentation. I have a 
> collection of source that needs to be compiled via the cmake build 
> system, plus a collection of object files that were compiled outside 
> the cmake build system.  I want to combine the two of these to make a 
> shared library, but apparently add_library only takes a list of source 
> files.  Is there a way of getting cmake to build a shared library with 
> the collection of source and object files I have?  I know I could make 
> an archive of the object files and use that library in 
> target_link_libraries, but I would like to avoid this if I can.
>

You should be able to list your object files like regular source files.
If they have known object file extensions they should be detected as 
such (.obj, .o, .lo).
Otherwise you can try setting the EXTERNAL_OBJECT[1] source file 
property for them.

Nils

[1] www.cmake.org/cmake/help/v3.0/prop_sf/EXTERNAL_OBJECT.html