Failing to create R package on Linux.

[hadjipantelis]

Hello, I try to create the R-package to install from source on CentOS 7 but loading the package during package building fails. I follow the instructions here.
In the past (around Feb-March 2017) I have installed and ran mxnet fine on this particular system but now the make rpkg fails so I am slightly puzzled what is going on. I have the same error as #1104 but the proposed solutions (make clean/ make clean_all prior to built) do not work. Building the MXNet core shared library works fine on face value, but building the MXNet R binding/package fails.

The exact commands I use are:

rm mxnet/ -rf
git clone --recursive https://github.com/apache/incubator-mxnet.git mxnet --branch 0.11.0
cd mxnet/
make clean_all #(I tried simple make clean too)
cp make/config.mk .
echo "ADD_CFLAGS += -I/usr/include/openblas" >>config.mk
make -j $(nproc) USE_OPENCV=0 USE_BLAS=openblas USE_LAPACK=1
make rpkg

The error that I get is:

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/userh/R/x86_64-redhat-linux-gnu-library/3.4/mxnet/libs/mxnet.so':
  /home/userh/R/x86_64-redhat-linux-gnu-library/3.4/mxnet/libs/mxnet.so: undefined symbol: _ZN2cv8fastFreeEPv

R environment:

R version 3.4.1 (2017-06-30)
Platform: x86_64-redhat-linux-gnu (64-bit)
Running under: CentOS Linux 7 (Core)

Matrix products: default
BLAS/LAPACK: /usr/lib64/R/lib/libRblas.so

locale:
 [1] LC_CTYPE=en_GB.UTF-8       LC_NUMERIC=C              
 [3] LC_TIME=en_GB.UTF-8        LC_COLLATE=en_GB.UTF-8    
 [5] LC_MONETARY=en_GB.UTF-8    LC_MESSAGES=en_GB.UTF-8   
 [7] LC_PAPER=en_GB.UTF-8       LC_NAME=C                 
 [9] LC_ADDRESS=C               LC_TELEPHONE=C            
[11] LC_MEASUREMENT=en_GB.UTF-8 LC_IDENTIFICATION=C       

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

loaded via a namespace (and not attached):
[1] compiler_3.4.1

I have also tried (as in #1011): 1. after make clean_all to go into cd ps-lite and make -j prior to the general building of the shared MXnet libraries as well as 2. after make clean_all to git submodule update but neither has resolved the error.
A final thing I tried is to install the clone current ( so use git clone --recursive https://github.com/apache/incubator-mxnet.git mxnet directly instead of 0.11.0 and then make clean etc. etc.) but this gave the same error as above.

(I am able to build the MXNet Python binding fine.)
(Update (16-Oct-2017): I am able to build the R bindings on Debian 8 but not on CentOS 7. -- Update (20-Oct-2017): OpenCV was installed in that system so unintentionally the dependency was met.
(Update (20-Oct-2017): I am able to build the R bindings on this CentOS system when using branch v0.10.0. Something has changed (probably in the R-package or MAKEFILE rpkg? I suspect that all the cp src/io/image_recordio.h R-package/src line; see also #7273 ) between the two versions causing CentOS to fail creating the R bindings.

Thank you!

[thirdwing]

I guess _ZN2cv8fastFreeEPv should come from opencv.

Please try to remove the installed mxnet package first.

[hadjipantelis]

@thirdwing: Hello, thank you for the reply.
Yes, of course I have removed my prior mxnet installation. The issue is that OpenCV is unavailable on the systems I work on and this prohibits running newer mxnet versions. (I don't work on CV/ImRec.)

[anirudhacharya]

This issue has been resolved in the latest master. @sandeep-krishnamurthy please close this issue.

@hadjipantelis feel free to reopen if the problem persists.