Cmake error about densepose_installation

[wine3603]

finally I past the zero_even_op.py test, get rid of the

OSError: /home/zhang-u16/DensePose/build/libcaffe2_detectron_custom_ops_gpu.so: undefined symbol: _ZN6caffe219CPUOperatorRegistryB5cxx11Ev

my final settings:

• `-- Found CUDA: /usr/local/cuda-8.0 (found version "8.0")
• -- Caffe2: CUDA detected: 8.0
• -- Caffe2: CUDA nvcc is: /usr/local/cuda-8.0/bin/nvcc
• -- Caffe2: CUDA toolkit directory: /usr/local/cuda-8.0
• -- Caffe2: Header version is: 8.0
• -- Found CUDNN: /home/zhang-u16/anaconda3/pkgs/cudnn-7.6.0-cuda9.0_0/include
• -- Found cuDNN: v7.6.0 (include: /home/my-u16/anaconda3/pkgs/cudnn-7.6.0-cuda9.0_0/include, library: /home/zhang-u16/anaconda3/pkgs/cudnn-7.6.0-cuda9.0_0/lib/libcudnn.so.7.6.0)
• -- Autodetected CUDA architecture(s): 6.1 6.1 6.1
• -- Added CUDA NVCC flags for: -gencode;arch=compute_61,code=sm_61
• -- Summary:
• -- CMake version : 3.14.0
• -- CMake command : /home/my-u16/anaconda3/envs/densepose/bin/cmake
• -- System name : Linux
• -- C++ compiler : /home/my-u16/gcc-4.9.2/build/bin/g++
• -- C++ compiler version : 4.9.2
• -- CXX flags : -std=c++11 -O2 -fPIC -Wno-narrowing
• -- Caffe2 version : 1.1.0
• -- Caffe2 include path : /home/my-u16/anaconda3/envs/densepose/lib/python3.7/site-packages/torch/include
• -- Caffe2 found CUDA : True
• -- CUDA version : 8.0
• -- CuDNN version : 7.6.0
• -- Configuring done
• -- Generating done

`

the bug was from g++ 5.4.0. since I have two gcc installed, to tell cmake(3.14.0 from conda install cmake) use the version of 4.9.2, I did:
cmake -DCMAKE_C_COMPILER="/home/my-u16/gcc-4.9.2/build/bin/gcc" -DCMAKE_CXX_COMPILER="/home/my-u16/gcc-4.9.2/build/bin/g++" ..
note that, set compiler path in CMakeLists.txt doesn't work for me, e.g.
#SET(CMAKE_CXX_COMPILER "/home/zhang-u16/gcc-4.9.2/build/bin/g++")

PS: this cmke-gui cannot work, since the GLIBCXX_3.4.21' not found problem,
remember to do make clean // rm CMakeCache.txt // rm -r build
before remake densepose.

[rishilss99]

Thanks for the help. I was able to finally compile custom operator using using cmake from conda itself.
conda install cmake

[Johnqczhang]

Which version of cmake did you install? It seems that your installed cmake is not compatible with your installed gcc.

[rishilss99]

Should I build cmake from source or should I install cmake from anaconda. The system cmake is currently at 3.5.1 version
Thanks

[Johnqczhang]

You can try to download the cmake zip file at specific version from the official website. FYI, I used cmake-3.8.2 to build DensePose

[wine3603]

i met the same problem, I did conda install cmake, and it is 3.14.0 in conda, but still the same error of missing GLIBCXX_3.4.21'

[wine3603]

Thanks for the help. I was able to finally compile custom operator using using cmake from conda itself.
conda install cmake

may I ask which cmake version were you using in your conda