Does not compile

[nightduck]

I tried 3 different packages, but the output below is from the roscuda_vectoradd example (after adding the missing THREADS_PER_BLOCK define and updating the cuda architectures in the CMakeLists file). The cpp file is not getting properly linked to the CUDA file.

Errors     << roscuda_vectoradd:make /home/oren/catkin_ws/logs/roscuda_vectoradd/build.make.001.log                                        
Generated /home/oren/catkin_ws/build/roscuda_vectoradd/CMakeFiles/TestLib.dir/src/./TestLib_generated_vectoradd.cu.o successfully.
CMakeFiles/roscuda_vectoradd.dir/src/main.cpp.o: In function `main':
main.cpp:(.text.startup+0x217): undefined reference to `testmain(int, int)'
collect2: error: ld returned 1 exit status
make[2]: *** [/home/oren/catkin_ws/devel/lib/roscuda_vectoradd/roscuda_vectoradd] Error 1
make[1]: *** [CMakeFiles/roscuda_vectoradd.dir/all] Error 2
make: *** [all] Error 2

[NicoMandel]

The declared testmain in the main.cpp file, here, wants 2 ints as arguments, whereas your vectoradd.cu only has one argument. Switch out either or and you should be fine.
I would propose switching main.cpp, so changing it to a declaration with one int. Also the call in the actual main loop, here requires deletion in that case.