cmake/modules/FindPythonLibrary.cmake

0001 # FindPythonLibrary.cmake
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_DIR - Location of the Python site-packages directory.
0016 #
0017 # PYTHON_INCLUDE_PATH - Directory holding the python.h include file.
0018 #
0019 # PYTHON_LIBRARY, PYTHON_LIBRARIES- Location of the Python library.
0020
0021 # Copyright (c) 2007, Simon Edwards <simon@simonzone.com>
0022 # Redistribution and use is allowed according to the terms of the BSD license.
0023 # For details see the accompanying COPYING-CMAKE-SCRIPTS file.
0024
0025 INCLUDE(CMakeFindFrameworks)
0026
0027 if(EXISTS PYTHON_LIBRARY)
0028   # Already in cache, be silent
0029   set(PYTHONLIBRARY_FOUND TRUE)
0030 else(EXISTS PYTHON_LIBRARY)
0031   FIND_PACKAGE(PythonInterp)
0032
0033   if(PYTHONINTERP_FOUND)
0034     FIND_FILE(_find_lib_python_py FindLibPython.py PATHS ${CMAKE_MODULE_PATH})
0035
0036     EXECUTE_PROCESS(COMMAND ${PYTHON_EXECUTABLE} ${_find_lib_python_py} OUTPUT_VARIABLE python_config)
0037     if(python_config)
0038       STRING(REGEX REPLACE ".*exec_prefix:([^\n]+).*$" "\\1" PYTHON_PREFIX ${python_config})
0039       STRING(REGEX REPLACE ".*\nshort_version:([^\n]+).*$" "\\1" PYTHON_SHORT_VERSION ${python_config})
0040       STRING(REGEX REPLACE ".*\nlong_version:([^\n]+).*$" "\\1" PYTHON_LONG_VERSION ${python_config})
0041       STRING(REGEX REPLACE ".*\npy_inc_dir:([^\n]+).*$" "\\1" PYTHON_INCLUDE_PATH ${python_config})
0042       STRING(REGEX REPLACE ".*\nsite_packages_dir:([^\n]+).*$" "\\1" PYTHON_SITE_PACKAGES_DIR ${python_config})
0043       STRING(REGEX REPLACE "([0-9]+).([0-9]+)" "\\1\\2" PYTHON_SHORT_VERSION_NO_DOT ${PYTHON_SHORT_VERSION})
0044       set(PYTHON_LIBRARY_NAMES python${PYTHON_SHORT_VERSION} python${PYTHON_SHORT_VERSION_NO_DOT})
0045       if(WIN32)
0046           STRING(REPLACE "\\" "/" PYTHON_SITE_PACKAGES_DIR ${PYTHON_SITE_PACKAGES_DIR})
0047       endif(WIN32)
0048       FIND_LIBRARY(PYTHON_LIBRARY NAMES ${PYTHON_LIBRARY_NAMES} PATHS ${PYTHON_PREFIX}/lib ${PYTHON_PREFIX}/libs NO_DEFAULT_PATH)
0049       set(PYTHONLIBRARY_FOUND TRUE)
0050     endif(python_config)
0051
0052     # adapted from cmake's builtin FindPythonLibs
0053     if(APPLE)
0054       CMAKE_FIND_FRAMEWORKS(Python)
0055       set(PYTHON_FRAMEWORK_INCLUDES)
0056       if(Python_FRAMEWORKS)
0057         # If a framework has been selected for the include path,
0058         # make sure "-framework" is used to link it.
0059         if("${PYTHON_INCLUDE_PATH}" MATCHES "Python\\.framework")
0060           set(PYTHON_LIBRARY "")
0061           set(PYTHON_DEBUG_LIBRARY "")
0062         endif("${PYTHON_INCLUDE_PATH}" MATCHES "Python\\.framework")
0063         if(NOT PYTHON_LIBRARY)
0064           set (PYTHON_LIBRARY "-framework Python" CACHE FILEPATH "Python Framework" FORCE)
0065         endif(NOT PYTHON_LIBRARY)
0066         set(PYTHONLIBRARY_FOUND TRUE)
0067       endif(Python_FRAMEWORKS)
0068     endif(APPLE)
0069   endif(PYTHONINTERP_FOUND)
0070
0071   if(PYTHONLIBRARY_FOUND)
0072     set(PYTHON_LIBRARIES ${PYTHON_LIBRARY})
0073     if(NOT PYTHONLIBRARY_FIND_QUIETLY)
0074       message(STATUS "Found Python executable: ${PYTHON_EXECUTABLE}")
0075       message(STATUS "Found Python version: ${PYTHON_LONG_VERSION}")
0076     endif(NOT PYTHONLIBRARY_FIND_QUIETLY)
0077   else(PYTHONLIBRARY_FOUND)
0078     if(PYTHONLIBRARY_FIND_REQUIRED)
0079       message(FATAL_ERROR "Could not find Python")
0080     endif(PYTHONLIBRARY_FIND_REQUIRED)
0081   endif(PYTHONLIBRARY_FOUND)
0082
0083 endif (EXISTS PYTHON_LIBRARY)