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:607 (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 7.0.0-3 (tags/RELEASE_700/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/calib3d/CMakeFiles/opencv_calib3d.dir/build.make:191: source_subfolder/modules/calib3d/CMakeFiles/opencv_calib3d.dir/src/dls.cpp.o] Error 143 make[2]: *** 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 7.0.0-3 (tags/RELEASE_700/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/calib3d/CMakeFiles/opencv_calib3d.dir/build.make:217: source_subfolder/modules/calib3d/CMakeFiles/opencv_calib3d.dir/src/fisheye.cpp.o] Error 143 clang: error: unable to execute command: Terminated clang: error: clang frontend command failed due to signal (use -v to see invocation) clang version 7.0.0-3 (tags/RELEASE_700/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/calib3d/CMakeFiles/opencv_calib3d.dir/build.make:230: source_subfolder/modules/calib3d/CMakeFiles/opencv_calib3d.dir/src/five-point.cpp.o] Error 143 make[1]: *** [CMakeFiles/Makefile2:1393: source_subfolder/modules/calib3d/CMakeFiles/opencv_calib3d.dir/all] Error 2 make: *** [Makefile:171: all] Error 2 ERROR: Exiting with code: 5