CMake Warning at source_subfolder/cmake/OpenCVDetectPython.cmake:81 (message): CMake's 'find_host_package(PythonInterp 2.7)' found wrong Python version: PYTHON_EXECUTABLE=/opt/pyenv/versions/3.7.5/bin/python PYTHON_VERSION_STRING=3.7.5 Consider providing the 'PYTHON2_EXECUTABLE' variable via CMake command line or environment variables Call Stack (most recent call first): source_subfolder/cmake/OpenCVDetectPython.cmake:271 (find_python) source_subfolder/CMakeLists.txt:606 (include) Traceback (most recent call last): File "", line 1, in ModuleNotFoundError: No module named 'numpy' clang: error: unable to execute command: Terminated clang: error: clang frontend command failed due to signal (use -v to see invocation) clang version 9.0.0-2 (tags/RELEASE_900/final) Target: x86_64-pc-linux-gnu Thread model: posix InstalledDir: /usr/bin clang: note: diagnostic msg: PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace, preprocessed source, and associated run script. Terminated make[2]: *** [source_subfolder/modules/ml/CMakeFiles/opencv_ml.dir/build.make:115: source_subfolder/modules/ml/CMakeFiles/opencv_ml.dir/src/gbt.cpp.o] Error 143 make[1]: *** [CMakeFiles/Makefile2:1641: source_subfolder/modules/ml/CMakeFiles/opencv_ml.dir/all] Error 2 make[1]: *** Waiting for unfinished jobs.... clang: error: unable to execute command: Terminated clang: error: clang frontend command failed due to signal (use -v to see invocation) clang version 9.0.0-2 (tags/RELEASE_900/final) Target: x86_64-pc-linux-gnu Thread model: posix InstalledDir: /usr/bin clang: note: diagnostic msg: PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace, preprocessed source, and associated run script. Terminated make[2]: *** [source_subfolder/modules/imgproc/CMakeFiles/opencv_imgproc.dir/build.make:139: source_subfolder/modules/imgproc/CMakeFiles/opencv_imgproc.dir/src/approx.cpp.o] Error 143 make[2]: *** Waiting for unfinished jobs.... make[2]: *** [source_subfolder/modules/imgproc/CMakeFiles/opencv_imgproc.dir/build.make:152: source_subfolder/modules/imgproc/CMakeFiles/opencv_imgproc.dir/src/bilateral_filter.dispatch.cpp.o] Terminated make[1]: *** [CMakeFiles/Makefile2:1587: source_subfolder/modules/imgproc/CMakeFiles/opencv_imgproc.dir/all] Terminated make[2]: *** [source_subfolder/modules/flann/CMakeFiles/opencv_flann.dir/build.make:98: lib/libopencv_flann.a] Terminated make[1]: *** [CMakeFiles/Makefile2:1560: source_subfolder/modules/flann/CMakeFiles/opencv_flann.dir/all] Terminated make: *** [Makefile:152: all] Error 2 ERROR: Exiting with code: 5