[CMake] Project being (unnecessarily) relinked

[Jesper Eskilson]

Jesper Eskilson wrote:
> Mathieu Malaterre wrote:
>> On 9/4/07, Jesper Eskilson <jesper at eskilson.se> wrote:
>>> Hi!
>>>
>>> I've got a Visual Studio 8 solution generated by CMake where one of the
>>> projects is always being relinked everytime I build it, even when
>>> nothing in it has changed (i.e. if I try to build it twice, it always
>>> relinks the project the second time).
>>>
>>> I've studied the build logs, but they do not make me any wiser.
>>>
>>> Does anyone recognize this behavior?
>>
>>
>> <wild guess>
>> Circular dependencie ?
>> </wild guess>
>>
>> I am not sure if outputing the depencie graph with graphiz could show
>> that, since it only output high level dep (libs/executable)
> 
> I think I've located the problem. The project in question uses
> target_link_library() in a possibly non-kosher way:
> 
>     target_link_library(Foo Bar.lib)
> 
> That is, the top-level target Foo should include "Bar.lib" on its
> command line. This seems to work insofar that it actually performs the
> link correctly, but for some reason it always relinks as well.
> 
> A related question: if I include an external project in my solution using
> 
>     include_external_msproject(Bar ../../Bar/Bar.vcproj)
> 
> can I later refer to this project using
> 
>     target_link_libraries(Foo Bar)
> 
> More generally, what is the correct way to specify that a CMake target
> should be linked with some external library?
>

I'm still very much interested in an answer to this question.

--
/Jesper


-- 
/Jesper