[CMake] FindCUDA fails to find libcuda.so

Marcel Loose marcel.loose at zonnet.nl
Tue Apr 30 16:37:38 EDT 2013 

Here are the results on my Ubuntu 12.10 system:

$ cmake --debug-output ..
Running with debug output on.
-- The C compiler identification is GNU 4.7.2
    Called from: [2] 
/usr/share/cmake-2.8/Modules/CMakeDetermineCCompiler.cmake
                 [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- The CXX compiler identification is GNU 4.7.2
    Called from: [2] 
/usr/share/cmake-2.8/Modules/CMakeDetermineCXXCompiler.cmake
                 [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- Check for working C compiler: /usr/bin/gcc
    Called from: [2] /usr/share/cmake-2.8/Modules/CMakeTestCCompiler.cmake
                 [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- Check for working C compiler: /usr/bin/gcc -- works
    Called from: [2] /usr/share/cmake-2.8/Modules/CMakeTestCCompiler.cmake
                 [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- Detecting C compiler ABI info
    Called from: [2] /usr/share/cmake-2.8/Modules/CMakeTestCCompiler.cmake
                 [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- Detecting C compiler ABI info - done
    Called from: [2] /usr/share/cmake-2.8/Modules/CMakeTestCCompiler.cmake
                 [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- Check for working CXX compiler: /usr/bin/c++
    Called from: [2] /usr/share/cmake-2.8/Modules/CMakeTestCXXCompiler.cmake
                 [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- Check for working CXX compiler: /usr/bin/c++ -- works
    Called from: [2] /usr/share/cmake-2.8/Modules/CMakeTestCXXCompiler.cmake
                 [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- Detecting CXX compiler ABI info
    Called from: [2] /usr/share/cmake-2.8/Modules/CMakeTestCXXCompiler.cmake
                 [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- Detecting CXX compiler ABI info - done
    Called from: [2] /usr/share/cmake-2.8/Modules/CMakeTestCXXCompiler.cmake
                 [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- Found CUDA: /usr (found version "4.2")
    Called from: [2] /usr/share/cmake-2.8/Modules/FindCUDA.cmake
                 [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- CUDA_LIBRARIES = /usr/lib/x86_64-linux-gnu/libcudart.so
    Called from: [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- Configuring done
-- Generating /home/marcel/temp/cmake/cuda/build
-- Generating done
-- Build files have been written to: /home/marcel/temp/cmake/cuda/build

And here's the output when setting CUDA_LIB_PATH:

$ CUDA_LIB_PATH=/usr/lib/nvidia-current cmake --debug-output ..
Running with debug output on.
-- The C compiler identification is GNU 4.7.2
    Called from: [2] 
/usr/share/cmake-2.8/Modules/CMakeDetermineCCompiler.cmake
                 [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- The CXX compiler identification is GNU 4.7.2
    Called from: [2] 
/usr/share/cmake-2.8/Modules/CMakeDetermineCXXCompiler.cmake
                 [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- Check for working C compiler: /usr/bin/gcc
    Called from: [2] /usr/share/cmake-2.8/Modules/CMakeTestCCompiler.cmake
                 [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- Check for working C compiler: /usr/bin/gcc -- works
    Called from: [2] /usr/share/cmake-2.8/Modules/CMakeTestCCompiler.cmake
                 [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- Detecting C compiler ABI info
    Called from: [2] /usr/share/cmake-2.8/Modules/CMakeTestCCompiler.cmake
                 [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- Detecting C compiler ABI info - done
    Called from: [2] /usr/share/cmake-2.8/Modules/CMakeTestCCompiler.cmake
                 [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- Check for working CXX compiler: /usr/bin/c++
    Called from: [2] /usr/share/cmake-2.8/Modules/CMakeTestCXXCompiler.cmake
                 [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- Check for working CXX compiler: /usr/bin/c++ -- works
    Called from: [2] /usr/share/cmake-2.8/Modules/CMakeTestCXXCompiler.cmake
                 [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- Detecting CXX compiler ABI info
    Called from: [2] /usr/share/cmake-2.8/Modules/CMakeTestCXXCompiler.cmake
                 [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- Detecting CXX compiler ABI info - done
    Called from: [2] /usr/share/cmake-2.8/Modules/CMakeTestCXXCompiler.cmake
                 [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- Found CUDA: /usr (found version "4.2")
    Called from: [2] /usr/share/cmake-2.8/Modules/FindCUDA.cmake
                 [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- CUDA_LIBRARIES = 
/usr/lib/x86_64-linux-gnu/libcudart.so;/usr/lib/nvidia-current/libcuda.so
    Called from: [1] /home/marcel/temp/cmake/cuda/CMakeLists.txt
-- Configuring done
-- Generating /home/marcel/temp/cmake/cuda/build
-- Generating done
-- Build files have been written to: /home/marcel/temp/cmake/cuda/build

Best regards,
Marcel Loose.

Op 29-04-13 18:04, Robert Maynard schreef:
> I have had no problem with Ubuntu 12.10 and Cuda 5; findCuda is able
> to find cuda in /usr/lib.  Can you run CMake --debug-output output
> enable and see where findCuda is searching?
>
> On Mon, Apr 29, 2013 at 11:52 AM, Marcel Loose <loose at astron.nl> wrote:
>> Hi Robert,
>>
>> I agree that on the CentOS machine the install paths are non-standard. For
>> the Ubuntu system, on the other hand, I have to disagree with that
>> statement. It is a *standard* Ubuntu 12.10 system, so IMHO FindCUDA.cmake
>> should be able to locate libcuda.so on that system.
>>
>> Regards,
>> Marcel Loose.
>>
>>
>> On 29/04/13 16:54, Robert Maynard wrote:
>>> You have a nonstandard install path that will require you to use
>>> CUDA_PATH / CUDA_BIN_PATH and CUDA_LIB_PATH.
>>>
>>> On Mon, Apr 29, 2013 at 10:10 AM, Marcel Loose <loose at astron.nl> wrote:
>>>> Hi,
>>>>
>>>> It fails to find CUDA 5.0. See below.
>>>>
>>>> $ env | grep CUDA
>>>> CUDA_PATH=/cm/shared/apps/cuda50/toolkit/5.0.35
>>>> CUDA_INC_PATH=/cm/shared/apps/cuda50/toolkit/5.0.35
>>>> CUDA_SDK=/cm/shared/apps/cuda50/sdk/5.0.35
>>>> CUDA_CACHE_DISABLE=1
>>>> CUDA_INSTALL_PATH=/cm/shared/apps/cuda50/toolkit/5.0.35
>>>> CUDA_ROOT=/cm/local/apps/cuda50/libs/304.54
>>>>
>>>> $ cat ../CMakeLists.txt
>>>> cmake_minimum_required(VERSION 2.8)
>>>> project(CheckCUDALibs)
>>>> find_package(CUDA)
>>>> message(STATUS "CUDA_LIBRARIES = ${CUDA_LIBRARIES}")
>>>>
>>>> $ cmake ..
>>>> -- The C compiler identification is GNU
>>>> -- The CXX compiler identification is GNU
>>>> -- Check for working C compiler: /usr/bin/gcc
>>>> -- Check for working C compiler: /usr/bin/gcc -- works
>>>> -- Detecting C compiler ABI info
>>>> -- Detecting C compiler ABI info - done
>>>> -- Check for working CXX compiler: /usr/bin/c++
>>>> -- Check for working CXX compiler: /usr/bin/c++ -- works
>>>> -- Detecting CXX compiler ABI info
>>>> -- Detecting CXX compiler ABI info - done
>>>> -- Found CUDA: /cm/shared/apps/cuda50/toolkit/5.0.35 (found version
>>>> "5.0")
>>>> -- CUDA_LIBRARIES =
>>>> /cm/shared/apps/cuda50/toolkit/5.0.35/lib64/libcudart.so
>>>> -- Configuring done
>>>> -- Generating done
>>>> -- Build files have been written to: /home/loose/temp/cmake/cuda/build
>>>>
>>>> $ CUDA_LIB_PATH=$CUDA_ROOT/lib cmake ..
>>>> -- CUDA_LIBRARIES =
>>>>
>>>> /cm/shared/apps/cuda50/toolkit/5.0.35/lib64/libcudart.so;/cm/local/apps/cuda50/libs/304.54/lib64/libcuda.so
>>>> -- Configuring done
>>>> -- Generating done
>>>> -- Build files have been written to: /home/loose/temp/cmake/cuda/build
>>>>
>>>> Only when explicitly setting CUDA_LIB_PATH, libcuda.so is found.
>>>>
>>>> BTW: On Ubuntu I also need to set CUDA_LIB_PATH, but then to
>>>> /usr/lib/nvidia-current.
>>>>
>>>> Regards,
>>>> Marcel Loose.
>>>>
>>>>
>>>>
>>>> On 29/04/13 15:36, Robert Maynard wrote:
>>>>> Can you provide what Cuda version FindCuda is failing to find, and
>>>>> where Cluster Manager is installing the CUDA toolkit and library?
>>>>>
>>>>> On Mon, Apr 29, 2013 at 7:38 AM, Marcel Loose <loose at astron.nl> wrote:
>>>>>> Hi all,
>>>>>>
>>>>>> I noticed that FindCUDA.cmake fails to locate libcuda.so on at least
>>>>>> two
>>>>>> different platforms: Ubuntu 12.10 and CentOS 6.3 using Cluster Manager
>>>>>> v5.2.
>>>>>> I can persuade FindCUDA.cmake to search for this library by explicitly
>>>>>> setting the environment variable CUDA_LIB_PATH, and then it finds it.
>>>>>> However, IMHO, using this trick should only be necessary as a last
>>>>>> resort.
>>>>>> Is this a bug?
>>>>>>
>>>>>> Best regards,
>>>>>> Marcel Loose.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>>
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