| # |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| # |
| |
| #.rst |
| # CheckPythonModule |
| # ---------------- |
| # |
| # Provides a macro to check if a python module is available |
| # |
| # .. commmand:: CHECK_PYTHON_MODULE |
| # |
| # :: |
| # |
| # CHECK_PYTHON_MODULE(<module> <variable>) |
| # |
| # Check if the given python ``<module>`` may be used by the detected |
| # python interpreter and store the result in an internal cache entry |
| # named ``<variable>``. |
| # |
| # The ``Python_EXECUTABLE`` variable must be set before calling this |
| # macro, usually by using find_package(Python). |
| |
| macro (CHECK_PYTHON_MODULE MODULE VARIABLE) |
| if (NOT ${VARIABLE} AND Python_EXECUTABLE) |
| execute_process( |
| COMMAND ${Python_EXECUTABLE} -c "import sys, pkgutil; sys.exit(0 if pkgutil.find_loader('${MODULE}') else 1)" |
| RESULT_VARIABLE RESULT) |
| if (RESULT EQUAL 0) |
| if(NOT CMAKE_REQUIRED_QUIET) |
| message(STATUS "Looking for Python module ${MODULE} - found") |
| endif() |
| set(${VARIABLE} 1 CACHE INTERNAL "Have Python module ${MODULE}") |
| else() |
| if(NOT CMAKE_REQUIRED_QUIET) |
| message(STATUS "Looking for Python module ${MODULE} - not found") |
| endif() |
| set(${VARIABLE} "" CACHE INTERNAL "Have Python module ${MODULE}") |
| endif() |
| endif() |
| endmacro() |