[GitHub] liori opened a new issue #12491: undefined symbol: _ZTVN2cv11_InputArrayE on `make rpkg` when USE_OPENCV=0

[GitBox <gi...@apache.org>]

liori opened a new issue #12491: undefined symbol: _ZTVN2cv11_InputArrayE on `make rpkg` when USE_OPENCV=0
URL: https://github.com/apache/incubator-mxnet/issues/12491
 
 
   ## Description
   
   Building the R package fails if OpenCV is disabled.
   
   ## Environment info (Required)
   
   Debian Stable (stretch). R installed from CRAN Debian packages (version 3.5.1). CUDA tools installed from Debian Backports repository. All other tools, including the necessary dependencies, installed from Debian Stretch repository (gcc 6.3).
   
   ## Minimum reproducible example
   
   `(git clone --recursive https://github.com/apache/incubator-mxnet; cd incubator-mxnet; time make -j $(nproc) USE_OPENCV=0 USE_BLAS=openblas USE_CUDA=1 USE_CUDA_PATH=/usr/lib/nvidia-cuda-toolkit && make rpkg)`
   
   fails with the following error:
   
   ```
   […]
   *** installing help indices
   ** building package indices
   ** installing vignettes
   ** testing if installed package can be loaded
   Error: package or namespace load failed for ‘mxnet’:
    .onLoad failed in loadNamespace() for 'mxnet', details:
     call: dyn.load(file, DLLpath = DLLpath, ...)
     error: unable to load shared object '/home/liori/R/x86_64-pc-linux-gnu-library/3.5/mxnet/libs/mxnet.so':
     /home/liori/R/x86_64-pc-linux-gnu-library/3.5/mxnet/libs/mxnet.so: undefined symbol: _ZTVN2cv11_InputArrayE
   Error: loading failed
   Execution halted
   ERROR: loading failed
   * removing ‘/home/liori/R/x86_64-pc-linux-gnu-library/3.5/mxnet’
   * restoring previous ‘/home/liori/R/x86_64-pc-linux-gnu-library/3.5/mxnet’
   Makefile:568: polecenia dla obiektu 'rpkg' nie powiodły się
   make: *** [rpkg] Błąd 1
   ```
   
   Changing `USE_OPENCV=0` to `USE_OPENCV=1` makes the package build correctly without any errors.
   
   If the R package requires OpenCV itself, I believe this should be just documented on the http://mxnet.incubator.apache.org/install/ubuntu_setup.html#install-the-mxnet-package-for-r webpage.

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