cmake/modules/FindPythonLibrary.cmake

0001 # Find Python
0002 # ~~~~~~~~~~~
0003 # Find the Python interpreter and related Python directories.
0004 #
0005 # This file defines the following variables:
0006 #
0007 # PYTHON_EXECUTABLE - The path and filename of the Python interpreter.
0008 #
0009 # PYTHON_SHORT_VERSION - The version of the Python interpreter found,
0010 #     excluding the patch version number. (e.g. 2.5 and not 2.5.1))
0011 #
0012 # PYTHON_LONG_VERSION - The version of the Python interpreter found as a human
0013 #     readable string.
0014 #
0015 # PYTHON_SITE_PACKAGES_INSTALL_DIR - this cache variable can be used for installing
0016 #                              own python modules. You may want to adjust this to be the
0017 #                              same as ${PYTHON_SITE_PACKAGES_DIR}, but then admin
0018 #                              privileges may be required for installation.
0019 #
0020 # PYTHON_SITE_PACKAGES_DIR - Location of the Python site-packages directory.
0021 #
0022 # PYTHON_INCLUDE_PATH - Directory holding the python.h include file.
0023 #
0024 # PYTHON_LIBRARY, PYTHON_LIBRARIES- Location of the Python library.
0025
0026 # Copyright (c) 2007, Simon Edwards <simon@simonzone.com>
0027 # Copyright (c) 2012, Luca Beltrame <lbeltrame@kde.org>
0028 # Redistribution and use is allowed according to the terms of the BSD license.
0029 # For details see the accompanying COPYING-CMAKE-SCRIPTS file.
0030
0031 include(FindPackageHandleStandardArgs)
0032
0033 find_package(PythonInterp)
0034
0035 if (PYTHONINTERP_FOUND)
0036
0037     option(INSTALL_PYTHON_FILES_IN_PYTHON_PREFIX "Install the Python files in the Python packages dir" FALSE)
0038
0039     # Set the Python libraries to what we actually found for interpreters
0040     set(Python_ADDITIONAL_VERSIONS "${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}")
0041     # These are kept for compatibility
0042     set(PYTHON_SHORT_VERSION "${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}")
0043     set(PYTHON_LONG_VERSION ${PYTHON_VERSION_STRING})
0044
0045     find_package(PythonLibs QUIET)
0046
0047     if(PYTHONLIBS_FOUND)
0048         set(PYTHON_LIBRARY ${PYTHON_LIBRARIES})
0049     endif(PYTHONLIBS_FOUND)
0050
0051     # Auto detect Python site-packages directory
0052     execute_process(COMMAND ${PYTHON_EXECUTABLE} -c "from distutils.sysconfig import get_python_lib; print(get_python_lib(True))"
0053                     OUTPUT_VARIABLE PYTHON_SITE_PACKAGES_DIR
0054                     OUTPUT_STRIP_TRAILING_WHITESPACE
0055                    )
0056
0057     message(STATUS "Python system site-packages directory: ${PYTHON_SITE_PACKAGES_DIR}")
0058     if(INSTALL_PYTHON_FILES_IN_PYTHON_PREFIX)
0059         set(PYTHON_SITE_PACKAGES_INSTALL_DIR ${PYTHON_SITE_PACKAGES_DIR})
0060     else()
0061         execute_process(COMMAND ${PYTHON_EXECUTABLE} -c "from distutils.sysconfig import get_python_lib; print(get_python_lib(True, prefix='${CMAKE_INSTALL_PREFIX}'))"
0062                         OUTPUT_VARIABLE PYTHON_SITE_PACKAGES_INSTALL_DIR
0063                         OUTPUT_STRIP_TRAILING_WHITESPACE
0064                        )
0065     endif()
0066
0067     if(NOT PYTHON_SITE_PACKAGES_INSTALL_DIR STREQUAL PYTHON_SITE_PACKAGES_DIR)
0068         message(STATUS "The Python files will be installed to ${PYTHON_SITE_PACKAGES_INSTALL_DIR}. Make sure to add them to the Python search path (e.g. by setting PYTHONPATH)")
0069     endif()
0070
0071 endif(PYTHONINTERP_FOUND)
0072
0073 find_package_handle_standard_args(PythonLibrary DEFAULT_MSG PYTHON_LIBRARY)