Python3.6Config.cmake python3.6-config.cmake

🐛 Bug

To Reproduce

Steps to reproduce the behavior:

1.cmake -DCMAKE_PREFIX_PATH="/opt/libtorch-cxx11-abi-shared-with-deps-1.5.0/libtorch;/home/ts/opt/torchvision" -DCMAKE_BUILD_TYPE=Release ..
2.CMake Warning at CMakeLists.txt:12 (find_package):
By not providing "FindPython3.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "Python3", but
CMake did not find one.

Could not find a package configuration file provided by "Python3" with any
of the following names:

Python3Config.cmake
python3-config.cmake

Add the installation prefix of "Python3" to CMAKE_PREFIX_PATH or set
"Python3_DIR" to a directory containing one of the above files. If
"Python3" provides a separate development package or SDK, be sure it has
been installed.

-- Looking for pthread.h
-- Looking for pthread.h - found
-- Looking for pthread_create
-- Looking for pthread_create - not found
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE
-- Found CUDA: /usr/local/cuda (found version "10.2")
-- Caffe2: CUDA detected: 10.2
-- Caffe2: CUDA nvcc is: /usr/local/cuda/bin/nvcc
-- Caffe2: CUDA toolkit directory: /usr/local/cuda
-- Caffe2: Header version is: 10.2
-- Found CUDNN: /usr/local/cuda/lib64/libcudnn.so
-- Found cuDNN: v7.6.5 (include: /usr/local/cuda/include, library: /usr/local/cuda/lib64/libcudnn.so)
-- Autodetected CUDA architecture(s): 6.1
-- Added CUDA NVCC flags for: -gencode;arch=compute_61,code=sm_61
-- Found torch: /opt/libtorch-cxx11-abi-shared-with-deps-1.5.0/libtorch/lib/libtorch.so
-- Configuring done
-- Generating done
-- Build files have been written to: /home/ts/project/vision/build

Expected behavior

Environment

Please copy and paste the output from our
environment collection script
(or fill out the checklist below manually).

You can get the script and run it with:

wget https://raw.githubusercontent.com/pytorch/pytorch/master/torch/utils/collect_env.py
# For security purposes, please check the contents of collect_env.py before running it.
python collect_env.py

• PyTorch / torchvision Version (1.5.0):
• OS ( Linux):
• How you installed PyTorch / torchvision (pip):
• Build command you used (if compiling from source):
• Python version:3.6.5
• CUDA/cuDNN version:10.2/7.6.5
• GPU models and configuration:
• Any other relevant information:

Additional context

CMake Warning at CMakeLists.txt:12 (find_package):
By not providing "FindPython3.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "Python3", but
CMake did not find one.

Could not find a package configuration file provided by "Python3" with any
of the following names:

Python3Config.cmake
python3-config.cmake

Add the installation prefix of "Python3" to CMAKE_PREFIX_PATH or set
"Python3_DIR" to a directory containing one of the above files. If
"Python3" provides a separate development package or SDK, be sure it has
been installed.

-- Looking for pthread.h
-- Looking for pthread.h - found
-- Looking for pthread_create
-- Looking for pthread_create - not found
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE
-- Found CUDA: /usr/local/cuda (found version "10.2")
-- Caffe2: CUDA detected: 10.2
-- Caffe2: CUDA nvcc is: /usr/local/cuda/bin/nvcc
-- Caffe2: CUDA toolkit directory: /usr/local/cuda
-- Caffe2: Header version is: 10.2
-- Found CUDNN: /usr/local/cuda/lib64/libcudnn.so
-- Found cuDNN: v7.6.5 (include: /usr/local/cuda/include, library: /usr/local/cuda/lib64/libcudnn.so)
-- Autodetected CUDA architecture(s): 6.1
-- Added CUDA NVCC flags for: -gencode;arch=compute_61,code=sm_61
-- Found torch: /opt/libtorch-cxx11-abi-shared-with-deps-1.5.0/libtorch/lib/libtorch.so
-- Configuring done
-- Generating done
-- Build files have been written to: /home/ts/project/vision/build

Start with CMakeLists.txt line 12 and reproduce the configuration using the reported CMake command and Python 3.6.5 environment. Check how the Python3 package is expected to be discovered and define done as resolving the reported Python3Config.cmake warning, since the issue does not state an expected behavior beyond the warning.