Finding CUDA_SDK_ROOT_DIR

问题

I am trying to set up Point Cloud Library trunk build with CUDA options enabled.

I believe I have installed CUDA correctly, following these instructions.

In the cmake options for the PCL build, some options are unrecognised:

Is there something I can manually set CUDA_SDK_ROOT_DIR to? Likewise for the other unfound options.

回答1:

CUDA_SDK_ROOT_DIR should be set to the direction in which you installed the NVIDIA's GPU Computing SDK. The GPU Computing SDK is downloadable from the same page at NVIDIA where you downloaded CUDA. By default, this SDK will install to $HOME/NVIDIA_GPU_Computing_SDK. Set it appropriately and then rerun cmake.

Edit:

The CUDA_SDK_ROOT_DIR variable is actually looking for the sub-directory beneath $HOME/NVIDIA_GPU_Computing_SDK that contains the version of CUDA you're using. For me, this is $HOME/NVIDIA_GPU_Computing_SDK/CUDA/v4.1.

回答2:

The source code for FindCUDA.cmake gives some hints on how this path is found:

########################
# Look for the SDK stuff.  As of CUDA 3.0 NVSDKCUDA_ROOT has been replaced with
# NVSDKCOMPUTE_ROOT with the old CUDA C contents moved into the C subdirectory
find_path(CUDA_SDK_ROOT_DIR common/inc/cutil.h
  "$ENV{NVSDKCOMPUTE_ROOT}/C"
  "$ENV{NVSDKCUDA_ROOT}"
  "[HKEY_LOCAL_MACHINE\\SOFTWARE\\NVIDIA Corporation\\Installed Products\\NVIDIA SDK 10\\Compute;InstallDir]"
  "/Developer/GPU\ Computing/C"
)

I.e. check that NVSDKCOMPUTE_ROOT or NVSDKCUDA_ROOT environment variables are set correctly.

回答3:

On a Linux machine,.. Add "$ENV{HOME}/NVIDIA_GPU_Computing_SDK/C" to the 'find_path' options in FindCUDA.cmake module: (usr/share/cmake-2.8/Modules/FindCUDA.cmake)

########################
# Look for the SDK stuff.  As of CUDA 3.0 NVSDKCUDA_ROOT has been replaced with
# NVSDKCOMPUTE_ROOT with the old CUDA C contents moved into the C subdirectory
find_path(CUDA_SDK_ROOT_DIR common/inc/cutil.h
  "$ENV{HOME}/NVIDIA_GPU_Computing_SDK/C"
  "$ENV{NVSDKCOMPUTE_ROOT}/C"
  "$ENV{NVSDKCUDA_ROOT}"
  "[HKEY_LOCAL_MACHINE\\SOFTWARE\\NVIDIA Corporation\\Installed Products\\NVIDIA SDK 10\\Compute;InstallDir]"
  "/Developer/GPU\ Computing/C"
)

cmake now finds my 4.0 SDK automatically.
But my build still fails to find cutil.h, even though it is there. $HOME/NVIDIA_GPU_Computing_SDK/C/common/inc/cutil.h. I had to add an include flag to the project to get it to finally work. CUDA_NVCC_FLAGS : -I/home/bill/NVIDIA_GPU_Computing_SDK/C/common/inc
Note: -I/$HOME/NVIDIA_GPU_Computing_SDK/C/common/inc does NOT work. (The env $HOME is set correctly.)

来源：https://stackoverflow.com/questions/8648712/finding-cuda-sdk-root-dir