[GitHub] [incubator-mxnet] yinghu5 edited a comment on issue #15294: mkldnn is not properly installed

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yinghu5 edited a comment on issue #15294: mkldnn is not properly installed
URL: https://github.com/apache/incubator-mxnet/issues/15294#issuecomment-508644374
 
 
   Hi butui 
   Thank you a lot for your report.  I actually was able to reproduce the problem under linux  by CMake install system. 
   >Cmake ..
   >make -j && make install
   and did some investigation: 
   the  root cause should be  CMAKE install mechanism will do the strip by default. It removes the runtime dependency library  libmklml_intel.so (coexist wtih intel openmp ) or libmklml_gnu.so (coexist with gomp). 
   for example, after Cmake, you can see the below code in the cmake_install.cmake : 
   
   file(RPATH_CHANGE
              FILE "${file}"
              OLD_RPATH "/home/yhu5/mxnet/incubator-mxnet/build/mklml/mklml_lnx_2019.0.5.20190502/lib:"
   **# NEW_RPATH " ")**
              NEW_RPATH "$ENV{DESTDIR}${CMAKE_INSTALL_PREFIX}/lib:")
         if(CMAKE_INSTALL_DO_STRIP)
           execute_process(COMMAND "/usr/bin/strip" "${file}")
   it did the remove. 
   So one of  basic solution may be 
   1. to  rewrite the CMAKElist .txt  to make sure  cmake install the libmklml and set the set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib" for example, 
   it required to create a new PR for libmklml install 
   
   I discussed this with tao.lv  and  as you sknow, there are some change about libmklml in later design.  so I may suggested  keep the current workaround  as you did
   or  use the workaround : 
   2. 1. cmake  make -j , make install   after that manually  export the so runtime path. 
   2. 2 export LD_LIBRARY_PATH = < include the path of mklml
   how do you think? Please feel free to let us know if the workaround is ok. 

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