Package: python3-numpy Version: 1:1.17.4-3 Control: affects -1 src:casacore
Dear numpy maintainers, the numpy package depends on all possible Python 3 versions at the same time: * python * python3.7 * python3.8 There is no need to depend on the individual Python versions; any supported version should be sufficient. Otherwise both versions are pulled, even when they are not used. My specific problem with that is that CMake fails to find the Python 3.7 development libraries when Python 3.8 is installed without development libs. This happens in the "casacore" package: Build-Depends: [...], python3-dev, python3-numpy, [...] This pulls python3.7, python3.8, python3.7-dev, but not (on purpose) python3.8-dev, which makes the following CMake fail: find_package(Python3 REQUIRED COMPONENTS Interpreter Development NumPy) results in CMake Error at /usr/share/cmake-3.15/Modules/FindPackageHandleStandardArgs.cmake:137 (message): Could NOT find Python3 (missing: Python3_LIBRARY Python3_INCLUDE_DIR Development NumPy) (found version "3.8.0") Call Stack (most recent call first): /usr/share/cmake-3.15/Modules/FindPackageHandleStandardArgs.cmake:378 (_FPHSA_FAILURE_MESSAGE) /usr/share/cmake-3.15/Modules/FindPython/Support.cmake:1653 (find_package_handle_standard_args) /usr/share/cmake-3.15/Modules/FindPython3.cmake:215 (include) python3/CMakeLists-cmake3.14.txt:3 (find_package) python3/CMakeLists.txt:4 (include) While this is probably a bug in cmake, it would help if one could avoid installing a Python version that is not standard for the moment. Best regards Ole
