| # SPDX-License-Identifier: Apache-2.0 |
| |
| include_guard(GLOBAL) |
| |
| # On Windows, instruct Python to output UTF-8 even when not |
| # interacting with a terminal. This is required since Python scripts |
| # are invoked by CMake code and, on Windows, standard I/O encoding defaults |
| # to the current code page if not connected to a terminal, which is often |
| # not what we want. |
| if (WIN32) |
| set(ENV{PYTHONIOENCODING} "utf-8") |
| endif() |
| |
| set(PYTHON_MINIMUM_REQUIRED 3.6) |
| |
| # We are using foreach here, instead of find_program(PYTHON_EXECUTABLE_SYSTEM_DEFAULT "python" "python3") |
| # cause just using find_program directly could result in a python2.7 as python, and not finding a valid python3. |
| foreach(PYTHON_PREFER ${PYTHON_PREFER} ${WEST_PYTHON} "python" "python3") |
| find_program(PYTHON_PREFER_EXECUTABLE ${PYTHON_PREFER}) |
| if(PYTHON_PREFER_EXECUTABLE) |
| execute_process (COMMAND "${PYTHON_PREFER_EXECUTABLE}" -c |
| "import sys; sys.stdout.write('.'.join([str(x) for x in sys.version_info[:2]]))" |
| RESULT_VARIABLE result |
| OUTPUT_VARIABLE version |
| ERROR_QUIET |
| OUTPUT_STRIP_TRAILING_WHITESPACE) |
| |
| if(version VERSION_LESS PYTHON_MINIMUM_REQUIRED) |
| set(PYTHON_PREFER_EXECUTABLE "PYTHON_PREFER_EXECUTABLE-NOTFOUND") |
| else() |
| set(PYTHON_MINIMUM_REQUIRED ${version}) |
| set(PYTHON_EXACT EXACT) |
| # Python3_ROOT_DIR ensures that location will be preferred by FindPython3. |
| # On Linux, this has no impact as it will usually be /usr/bin |
| # but on Windows it solve issues when both 32 and 64 bit versions are |
| # installed, as version is not enough and FindPython3 might pick the |
| # version not on %PATH%. Setting Python3_ROOT_DIR ensures we are using |
| # the version we just tested. |
| get_filename_component(PYTHON_PATH ${PYTHON_PREFER_EXECUTABLE} DIRECTORY) |
| set(Python3_ROOT_DIR ${PYTHON_PATH}) |
| break() |
| endif() |
| endif() |
| endforeach() |
| |
| find_package(Python3 ${PYTHON_MINIMUM_REQUIRED} REQUIRED ${PYTHON_EXACT}) |
| set(PYTHON_EXECUTABLE ${Python3_EXECUTABLE}) |