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Posted to commits@mxnet.apache.org by GitBox <gi...@apache.org> on 2020/08/11 01:29:00 UTC

[GitHub] [incubator-mxnet] Zha0q1 opened a new issue #18898: Static Build with OPENCV Linking Error

Zha0q1 opened a new issue #18898:
URL: https://github.com/apache/incubator-mxnet/issues/18898


   I used this cmake config
   ```
   set(CMAKE_BUILD_TYPE "Distribution" CACHE STRING "Build type")
   set(CFLAGS "-mno-avx" CACHE STRING "CFLAGS")
   set(CXXFLAGS "-mno-avx" CACHE STRING "CXXFLAGS")
   
   set(USE_CUDA OFF CACHE BOOL "Build with CUDA support")
   set(USE_OPENCV ON CACHE BOOL "Build with OpenCV support")
   set(USE_OPENMP ON CACHE BOOL "Build with Openmp support")
   set(USE_MKL_IF_AVAILABLE OFF CACHE BOOL "Use Intel MKL if found")
   set(USE_MKLDNN ON CACHE BOOL "Build with MKL-DNN support")
   set(USE_LAPACK OFF CACHE BOOL "Build with lapack support")
   set(USE_TVM_OP OFF CACHE BOOL "Enable use of TVM operator build system.")
   set(USE_SSE ON CACHE BOOL "Build with x86 SSE instruction support")
   set(USE_F16C OFF CACHE BOOL "Build with x86 F16C instruction support")
   set(USE_LIBJPEG_TURBO ON CACHE BOOL "Build with libjpeg-turbo")
   set(USE_DIST_KVSTORE ON CACHE BOOL "Build with DIST_KVSTORE support")
   
   set(USE_INT64_TENSOR_SIZE ON CACHE BOOL "Use int64_t to represent the total number of elements in a tensor")
   ```
   The compilation was successful but when importing mxnet this was the error message:
   ```
   OSError: /home/ubuntu/.local/mxnet/libmxnet.so: undefined symbol: _gfortran_concat_string
   ```
   Disabling opencv resolved the issue
   


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[GitHub] [incubator-mxnet] leezu edited a comment on issue #18898: Static Build with OPENCV Linking Error

Posted by GitBox <gi...@apache.org>.
leezu edited a comment on issue #18898:
URL: https://github.com/apache/incubator-mxnet/issues/18898#issuecomment-672162202


   > I am building with ilp64 mkl 
   
   However you set `USE_MKL_IF_AVAILABLE OFF` and you didn't specify the `BLAS` option?
   
   If you build with mkl blas, mxnet will not depend on libgfortran. As you build opencv with a dependency on libgfortran and static link opencv, you need to manually specify the dependency on libgfortran. It would be better to use a consistent BLAS library when building OpenCV and MXNet, ie also use MKL for OpenCV


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[GitHub] [incubator-mxnet] Zha0q1 edited a comment on issue #18898: Static Build with OPENCV Linking Error

Posted by GitBox <gi...@apache.org>.
Zha0q1 edited a comment on issue #18898:
URL: https://github.com/apache/incubator-mxnet/issues/18898#issuecomment-672107948


   > Is this on master or on your modified code?
   
   This is on master


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[GitHub] [incubator-mxnet] Zha0q1 commented on issue #18898: Static Build with OPENCV Linking Error

Posted by GitBox <gi...@apache.org>.
Zha0q1 commented on issue #18898:
URL: https://github.com/apache/incubator-mxnet/issues/18898#issuecomment-672143328


   > Why do you turn `USE_LAPACK OFF`? 
   
   I am building with ilp64 mkl so lapack signatures are different. This is something I will work on fixing but for this build I turned it off.
   > Do you build via the tools/staticbuild/build.s?
   
   Yes. The build succeeded but I ran into that error at runtime


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[GitHub] [incubator-mxnet] leezu commented on issue #18898: Static Build with OPENCV Linking Error

Posted by GitBox <gi...@apache.org>.
leezu commented on issue #18898:
URL: https://github.com/apache/incubator-mxnet/issues/18898#issuecomment-672120536


   Why do you turn `USE_LAPACK OFF`?


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[GitHub] [incubator-mxnet] leezu commented on issue #18898: Static Build with OPENCV Linking Error

Posted by GitBox <gi...@apache.org>.
leezu commented on issue #18898:
URL: https://github.com/apache/incubator-mxnet/issues/18898#issuecomment-672088991


   Is this on master or on your modified code?


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[GitHub] [incubator-mxnet] leezu edited a comment on issue #18898: Static Build with OPENCV Linking Error

Posted by GitBox <gi...@apache.org>.
leezu edited a comment on issue #18898:
URL: https://github.com/apache/incubator-mxnet/issues/18898#issuecomment-672120536


   Why do you turn `USE_LAPACK OFF`? Do you build via the `tools/staticbuild/build.s`? Otherwise the `Distribution` build type is not supported.


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[GitHub] [incubator-mxnet] leezu edited a comment on issue #18898: Static Build with OPENCV Linking Error

Posted by GitBox <gi...@apache.org>.
leezu edited a comment on issue #18898:
URL: https://github.com/apache/incubator-mxnet/issues/18898#issuecomment-672162202


   > I am building with ilp64 mkl 
   
   However you set `USE_MKL_IF_AVAILABLE OFF` and you didn't specify the `BLAS` option. 
   
   If you build with mkl blas, mxnet will not depend on libgfortran. As you build opencv with a dependency on libgfortran and static link opencv, you need to manually specify the dependency on libgfortran. It would be better to use a consistent BLAS library when building OpenCV and MXNet, ie also use MKL for OpenCV


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[GitHub] [incubator-mxnet] leezu commented on issue #18898: Static Build with OPENCV Linking Error

Posted by GitBox <gi...@apache.org>.
leezu commented on issue #18898:
URL: https://github.com/apache/incubator-mxnet/issues/18898#issuecomment-672162202


   > I am building with ilp64 mkl 
   
   However you set `USE_MKL_IF_AVAILABLE OFF` and you didn't specify the `BLAS` option


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[GitHub] [incubator-mxnet] szha commented on issue #18898: Static Build with OPENCV Linking Error

Posted by GitBox <gi...@apache.org>.
szha commented on issue #18898:
URL: https://github.com/apache/incubator-mxnet/issues/18898#issuecomment-671731355


   Looks like the same issue as this? https://github.com/xianyi/OpenBLAS/issues/460


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[GitHub] [incubator-mxnet] Zha0q1 commented on issue #18898: Static Build with OPENCV Linking Error

Posted by GitBox <gi...@apache.org>.
Zha0q1 commented on issue #18898:
URL: https://github.com/apache/incubator-mxnet/issues/18898#issuecomment-672423339


   
   > However you set `USE_MKL_IF_AVAILABLE OFF` and you didn't specify the `BLAS` option?
   
   Right, I overlooked this. But our cmake will still choose mkl as our choice of blas.
   
   > If you build with mkl blas, mxnet will not depend on libgfortran. As you build opencv with a dependency on libgfortran and static link opencv, you need to manually specify the dependency on libgfortran. It would be better to use a consistent BLAS library when building OpenCV and MXNet, ie also use MKL for OpenCV
   
   Thanks for the insight! As discussed offline we will be providing a fix to this


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[GitHub] [incubator-mxnet] Zha0q1 commented on issue #18898: Static Build with OPENCV Linking Error

Posted by GitBox <gi...@apache.org>.
Zha0q1 commented on issue #18898:
URL: https://github.com/apache/incubator-mxnet/issues/18898#issuecomment-672107948


   > Is this on master or on your modified code?
   
   This is on Master


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