[Rtk-users] Question on the definition of RTK_LIBRARIES from FindRTK.cmake

[Fredrik Hellman]

Hi,

I have been using the CMake find_package()-function to set the
RTK_LIBRARIES variable in order to link my application with RTK, rtkcuda
etc.

I noticed that RTK_LIBRARIES also contains the paths to the CUDA libaries:
cuda, cudart, cufft, cublas.

I have had some problems with this, since my application (forced by a bug
in FindCUDA for my CMake-version) needs to link with the static CUDA
libraries, while RTK links with the dynamic (or static, I am not sure).
Regardless, I end up with duplicate symbols for some cuda runtime API
functions when linking with ${RTK_LIBRARIES} and ${CUDA_LIBRARIES} for my
application.

So, the general question is: Should third-party libraries be included in
the variable XXX_LIBRARIES after running find_package?

I am not sure, but I believe not. The patch below in RTK fixed the problems
for me. Then, of course, I need to always link with CUDA from my
independent project (an application in my case) when linking with RTK. But
I guess that's the way it is typically done.

---
 code/CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/code/CMakeLists.txt b/code/CMakeLists.txt
index 437274ec..a1cdcec3 100644
--- a/code/CMakeLists.txt
+++ b/code/CMakeLists.txt
@@ -62,7 +62,7 @@ target_link_libraries(RTK lpsolve55)
 #=========================================================
 # Cuda library stuff
 if (RTK_USE_CUDA)
-  set (RTK_LIBRARIES ${RTK_LIBRARIES} rtkcuda ITKCudaCommon
${CUDA_CUDA_LIBRARY} ${CUDA_CUDART_LIBRARY} ${CUDA_CUFFT_LIBRARIES}
${CUDA_CUBLAS_LIBRARIES})
+  set (RTK_LIBRARIES ${RTK_LIBRARIES} rtkcuda ITKCudaCommon)
   set (rtkcuda_CUDA_FILES
        rtkCudaCropImageFilter.cu
        rtkCudaUtilities.cu
-- 

Best wishes,
Fredrik
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