[CMake] Transitive include and link libraries on imported targets ?

[David Jobet]

Well not quite.
I tried that, but my current definition is rather
Target_link_libraries(B interface B_imported)

I don't remember for which reason I had to do it in 2 stages like that (the A/A_imported and B/B_imported versions)

If I add A in the list to read :
Target_link_libraries(B interface B_imported A)

Then linking against B does add B_imported and A, but it does not keep the link order and might put B_imported before A on the command line.

I'll try with property INTERFACE_LINK_LIBRARIES instead, and will also try to remove those 2 stages...

With regards

David

Le 6 avril 2017 05:11:46 GMT+01:00, Dvir Yitzchaki <Dvir.Yitzchaki at ceva-dsp.com> a écrit :
>target_link_libraries(B INTERFACE A)
>
>Regards,
>Dvir
>
>From: CMake [mailto:cmake-bounces at cmake.org] On Behalf Of David Jobet
>Sent: Wednesday, April 5, 2017 18:34
>To: cmake at cmake.org
>Subject: [CMake] Transitive include and link libraries on imported
>targets ?
>
>Hello,
>
>Let's say I build some external libs A and B with B depending on A.
>B and A do not use cmake, so I build them and install them in a
>3rdparty directory. I now have access to includes and libs.
>I then create some cmake file to describe those libs so I can use them
>in my project :
>Add_library(A_imported STATIC imported)
>Set_property(TARGET A_imported APPEND PROPERTY
>INTERFACE_INCLUDE_DIRECTORIES 3rdparty/include/A)
>Set_property(TARGET A_imported APPEND PROPERTY IMPORTED_LOCATION
>3rdparty/libs/libA.a)
>Add_library(A INTERFACE)
>Target_link_library(A INTERFACE A_imported)
>
>Same thing for B
>
>Now let's say I create a top-level target T that depends on B.
>Compilation might fail because B might include files from A and A is
>currently not a dependency of T.
>
>I can fix it in 2 ways :
>1- add A as a dependency of T, but I will need to do it on all my Ts
>2- somehow make B have transitive dependencies for include and link on
>A. That would be my prefered choice... But I don't know how to do it.
>
>Is it possible ? How ?
>
>Tx for your help.
>
>David

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