catkin and cuda_add_library

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Hi, I have the following error when I try to build a *.cu file using cuda_add_library. cuda_add_library works fine on normal cpp files though.

nvcc fatal   : A single input file is required for a non-link phase when an outputfile is specified

Portion of my verbose build is below. It seems like the nvcc build string for DenseTracking.cu is wrong. The same for so3.cpp looks fine. I have no problems on rosbuild though.

[ 30%] Building CXX object CMakeFiles/so_phus.dir/src/so_phus/so3.cpp.o
**/usr/bin/c++   -DBT_USE_DOUBLE_PRECISION -DCUDA_BUILD -DROS_PACKAGE_NAME=\"dwo_slam\" -Dso_phus_EXPORTS -O3 -fPIC -I/usr/local/include/opencv -I/usr/local/include -I/home/hope/Dropbox/office/catkin_ws/src/dwo_slam/include -I/opt/ros/hydro/include -I/opt/ros/hydro/include/opencv -I/usr/include/eigen3 -I/usr/include/suitesparse -I/home/hope/svslocal/include -I/usr/local/cuda/include -I/usr/local/cuda-5.5/include    -o CMakeFiles/so_phus.dir/src/so_phus/so3.cpp.o -c /home/hope/Dropbox/office/catkin_ws/src/dwo_slam/src/so_phus/so3.cpp
Linking CXX shared library devel/lib/libso_phus.so**
/usr/bin/cmake -E cmake_link_script CMakeFiles/so_phus.dir/link.txt --verbose=1
/usr/bin/c++  -fPIC -O3   -shared -Wl,-soname,libso_phus.so -o devel/lib/libso_phus.so CMakeFiles/so_phus.dir/src/so_phus/se3.cpp.o CMakeFiles/so_phus.dir/src/so_phus/so3.cpp.o /usr/local/cuda-5.5/lib64/libcudart.so -lcuda -Wl,-rpath,/usr/local/cuda-5.5/lib64 


[ 38%] Building NVCC (Device) object ./dwoSLAM_generated_DenseTracking.cu.o
/usr/bin/cmake -E make_directory /home/hope/Dropbox/office/catkin_ws/src/dwo_slam/.
/usr/bin/cmake -D verbose:BOOL=1 -D build_configuration:STRING= -D generated_file:STRING=/home/hope/Dropbox/office/catkin_ws/src/dwo_slam/./dwoSLAM_generated_DenseTracking.cu.o -D generated_cubin_file:STRING=/home/hope/Dropbox/office/catkin_ws/src/dwo_slam/./dwoSLAM_generated_DenseTracking.cu.o.cubin.txt -P /home/hope/Dropbox/office/catkin_ws/src/dwo_slam/CMakeFiles/dwoSLAM_generated_DenseTracking.cu.o.cmake
-- Removing /home/hope/Dropbox/office/catkin_ws/src/dwo_slam/./dwoSLAM_generated_DenseTracking.cu.o
/usr/bin/cmake -E remove /home/hope/Dropbox/office/catkin_ws/src/dwo_slam/./dwoSLAM_generated_DenseTracking.cu.o
-- Generating dependency file: /home/hope/Dropbox/office/catkin_ws/src/dwo_slam/CMakeFiles/dwoSLAM_generated_DenseTracking.cu.o.NVCC-depend
**/usr/local/cuda-5.5/bin/nvcc -M -D__CUDACC__ /home/hope/Dropbox/office/catkin_ws/src/dwo_slam/src/DenseTracking.cu -o /home/hope/Dropbox/office/catkin_ws/src/dwo_slam/CMakeFiles/dwoSLAM_generated_DenseTracking.cu.o.NVCC-depend -m64 -DROS_PACKAGE_NAME= dwo_slam\" -DCUDA_BUILD -DBT_USE_DOUBLE_PRECISION -DdwoSLAM_EXPORTS\" -Xcompiler ,\"-O3\",\"-fPIC\",\"-g\" -arch=sm_20 --use_fast_math -O3 -DNVCC -I/usr/local/cuda-5.5/include -I/usr/local/include/opencv -I/usr/local/include -I/home/hope/Dropbox/office/catkin_ws/src/dwo_slam/include -I/opt/ros/hydro/include -I/opt/ros/hydro/include/opencv -I/usr/include -I/usr/include/eigen3 -I/usr/include/suitesparse -I/home/hope/svslocal/include -I/usr/local/cuda/include -I/usr/local/cuda-5.5/include**
nvcc fatal   : A single input file is required for a non-link phase when an outputfile is specified
CMake Error at CMakeFiles/dwoSLAM_generated_DenseTracking.cu.o.cmake:198 (message):
  Error generating
  /home/hope/Dropbox/office/catkin_ws/src/dwo_slam/./dwoSLAM_generated_DenseTracking.cu.o

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