[CMake] Dependency on library in a separate branch

[David Cole]

In your top level CMakeLists.txt:

add_subdirectory(B)
add_subdirectory(A)
add_subdirectory(C)

A & C must come after B since they both depend on B.

Does that help?


Hope so,
David


2011/6/26 Klaim - Joël Lamotte <mjklaim at gmail.com>

> Hi,
>
> I'm having trouble understanding how I should solve this case correctly in
> CMake :
>
> I want my project A to include+link my project B. I already made it with
> project C but it don't work with A.
> I think the problems comes from the directory structure :
>
> /myrepo/tools/A (exe/Qt)
> /myrepo/tools/B (shared library)
> /myrepo/tools/B/C (exe)
>
> Each of those folders have a CMakeFiles.txt file that add_subdirectory(
> the_sub_directories ).
>
> B uses include_directories() and C use target_link_libraries( C B )
> So C does include and compile+link with code using B code.
>
> A code runs fine alone, but now I need it to use B.
> I've added
>
> target_link_libraries( A ${QT_LIBRARIES} B )
>
> to make sure it does uses B but the generated projects don't have the B
> include  directory.
>
> I know that I could use an advanced variable to get the include file, but I
> don't find it consistent with the fact that
> C executable does implicitely use the include file from B. A being
> configured the same, it should work too... no?
>
> I think it's related to the projects CMakeFiles.txt positions in the
> directory hierarchy but I'm still often wrestling with CMake so I'm not
> sure.
>
> What would be the idiomatic CMake way of making A include+link B?
>
> The real code is open source so I can show you exactly what is my current
> setup if it helps (but I guess it's a noob question...)
>
>
> Klaim - Joël Lamotte
>
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