build_files/cmake/Modules/FindPythonLibsUnix.cmake

   1 # - Find Python libraries
   2 # Find the native Python includes and library
   3 #
   4 # Note:, This is not _yet_ intended to be a general python module for other
   5 #  projects to use since its hard coded to python 3.2 as blender only supports
   6 #  a single python version.
   7 #  This is for blender/unix python only.
   8 #
   9 # This module defines
  10 #  PYTHON_VERSION
  11 #  PYTHON_INCLUDE_DIRS
  12 #  PYTHON_INCLUDE_CONFIG_DIRS
  13 #  PYTHON_LIBRARIES
  14 #  PYTHON_LIBPATH, Used for installation
  15 #  PYTHON_LINKFLAGS
  16 #  PYTHON_ROOT_DIR, The base directory to search for Python.
  17 #                   This can also be an environment variable.
  18 #
  19 # also defined, but not for general use are
  20 #  PYTHON_LIBRARY, where to find the python library.
  21
  22 #=============================================================================
  23 # Copyright 2011 Blender Foundation.
  24 #
  25 # Distributed under the OSI-approved BSD License (the "License");
  26 # see accompanying file Copyright.txt for details.
  27 #
  28 # This software is distributed WITHOUT ANY WARRANTY; without even the
  29 # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  30 # See the License for more information.
  31 #=============================================================================
  32
  33 # If PYTHON_ROOT_DIR was defined in the environment, use it.
  34 IF(NOT PYTHON_ROOT_DIR AND NOT $ENV{PYTHON_ROOT_DIR} STREQUAL "")
  35   SET(PYTHON_ROOT_DIR $ENV{PYTHON_ROOT_DIR})
  36 ENDIF()
  37
  38 SET(PYTHON_VERSION 3.3 CACHE STRING "Python Version (major and minor only)")
  39 MARK_AS_ADVANCED(PYTHON_VERSION)
  40
  41
  42 # See: http://docs.python.org/extending/embedding.html#linking-requirements
  43 #      for why this is needed
  44 SET(PYTHON_LINKFLAGS "-Xlinker -export-dynamic" CACHE STRING "Linker flags for python")
  45 MARK_AS_ADVANCED(PYTHON_LINKFLAGS)
  46
  47
  48 # if the user passes these defines as args, we dont want to overwrite
  49 SET(_IS_INC_DEF OFF)
  50 SET(_IS_INC_CONF_DEF OFF)
  51 SET(_IS_LIB_DEF OFF)
  52 SET(_IS_LIB_PATH_DEF OFF)
  53 IF(DEFINED PYTHON_INCLUDE_DIR)
  54   SET(_IS_INC_DEF ON)
  55 ENDIF()
  56 IF(DEFINED PYTHON_INCLUDE_CONFIG_DIR)
  57   SET(_IS_INC_CONF_DEF ON)
  58 ENDIF()
  59 IF(DEFINED PYTHON_LIBRARY)
  60   SET(_IS_LIB_DEF ON)
  61 ENDIF()
  62 IF(DEFINED PYTHON_LIBPATH)
  63   SET(_IS_LIB_PATH_DEF ON)
  64 ENDIF()
  65
  66
  67 # only search for the dirs if we havn't already
  68 IF((NOT _IS_INC_DEF) OR (NOT _IS_INC_CONF_DEF) OR (NOT _IS_LIB_DEF) OR (NOT _IS_LIB_PATH_DEF))
  69
  70   SET(_python_ABI_FLAGS
  71     "m;mu;u; "    # release
  72     "md;mud;ud;d" # debug
  73   )
  74
  75   STRING(REPLACE "." "" _PYTHON_VERSION_NO_DOTS ${PYTHON_VERSION})
  76
  77   SET(_python_SEARCH_DIRS
  78     ${PYTHON_ROOT_DIR}
  79     "$ENV{HOME}/py${_PYTHON_VERSION_NO_DOTS}"
  80     "/opt/py${_PYTHON_VERSION_NO_DOTS}"
  81     "/opt/lib/python-${PYTHON_VERSION}"
  82   )
  83
  84   FOREACH(_CURRENT_ABI_FLAGS ${_python_ABI_FLAGS})
  85     #IF(CMAKE_BUILD_TYPE STREQUAL Debug)
  86     #  SET(_CURRENT_ABI_FLAGS "d${_CURRENT_ABI_FLAGS}")
  87     #ENDIF()
  88     STRING(REPLACE " " "" _CURRENT_ABI_FLAGS ${_CURRENT_ABI_FLAGS})
  89
  90     IF(NOT DEFINED PYTHON_INCLUDE_DIR)
  91       FIND_PATH(PYTHON_INCLUDE_DIR
  92         NAMES
  93           Python.h
  94         HINTS
  95           ${_python_SEARCH_DIRS}
  96         PATH_SUFFIXES
  97           include/python${PYTHON_VERSION}${_CURRENT_ABI_FLAGS}
  98           include/${CMAKE_LIBRARY_ARCHITECTURE}/python${PYTHON_VERSION}${_CURRENT_ABI_FLAGS}
  99       )
 100     ENDIF()
 101
 102     IF(NOT DEFINED PYTHON_INCLUDE_CONFIG_DIR)
 103       FIND_PATH(PYTHON_INCLUDE_CONFIG_DIR
 104         NAMES
 105           pyconfig.h
 106         HINTS
 107           ${_python_SEARCH_DIRS}
 108         PATH_SUFFIXES
 109           include/python${PYTHON_VERSION}${_CURRENT_ABI_FLAGS}
 110           include/${CMAKE_LIBRARY_ARCHITECTURE}/python${PYTHON_VERSION}${_CURRENT_ABI_FLAGS}
 111       )
 112       IF((NOT PYTHON_INCLUDE_CONFIG_DIR) AND PYTHON_INCLUDE_DIR)
 113         # Fallback...
 114         UNSET(PYTHON_INCLUDE_CONFIG_DIR CACHE)
 115         SET(PYTHON_INCLUDE_CONFIG_DIR ${PYTHON_INCLUDE_DIR} CACHE PATH "")
 116       ENDIF()
 117     ENDIF()
 118
 119     IF(NOT DEFINED PYTHON_LIBRARY)
 120       FIND_LIBRARY(PYTHON_LIBRARY
 121         NAMES
 122           "python${PYTHON_VERSION}${_CURRENT_ABI_FLAGS}"
 123         HINTS
 124           ${_python_SEARCH_DIRS}
 125         PATH_SUFFIXES
 126           lib64 lib
 127       )
 128     ENDIF()
 129
 130     IF(NOT DEFINED PYTHON_LIBPATH)
 131       FIND_PATH(PYTHON_LIBPATH
 132         NAMES
 133           "python${PYTHON_VERSION}/abc.py" # This is a bit hackish! :/
 134         HINTS
 135           ${_python_SEARCH_DIRS}
 136         PATH_SUFFIXES
 137           lib64 lib
 138       )
 139       IF((NOT PYTHON_LIBPATH) AND PYTHON_LIBRARY)
 140         # Fallback...
 141         UNSET(PYTHON_LIBPATH CACHE)
 142         GET_FILENAME_COMPONENT(PYTHON_LIBPATH ${PYTHON_LIBRARY} PATH)
 143       ENDIF()
 144     ENDIF()
 145
 146     IF(PYTHON_LIBRARY AND PYTHON_LIBPATH AND PYTHON_INCLUDE_DIR AND PYTHON_INCLUDE_CONFIG_DIR)
 147       break()
 148     ELSE()
 149       # ensure we dont find values from 2 different ABI versions
 150       IF(NOT _IS_INC_DEF)
 151         UNSET(PYTHON_INCLUDE_DIR CACHE)
 152       ENDIF()
 153       IF(NOT _IS_INC_CONF_DEF)
 154         UNSET(PYTHON_INCLUDE_CONFIG_DIR CACHE)
 155       ENDIF()
 156       IF(NOT _IS_LIB_DEF)
 157         UNSET(PYTHON_LIBRARY CACHE)
 158       ENDIF()
 159       IF(NOT _IS_LIB_PATH_DEF)
 160         UNSET(PYTHON_LIBPATH CACHE)
 161       ENDIF()
 162     ENDIF()
 163   ENDFOREACH()
 164
 165   UNSET(_CURRENT_ABI_FLAGS)
 166   UNSET(_CURRENT_PATH)
 167
 168   UNSET(_python_ABI_FLAGS)
 169   UNSET(_python_SEARCH_DIRS)
 170 ENDIF()
 171
 172 UNSET(_IS_INC_DEF)
 173 UNSET(_IS_INC_CONF_DEF)
 174 UNSET(_IS_LIB_DEF)
 175 UNSET(_IS_LIB_PATH_DEF)
 176
 177 # handle the QUIETLY and REQUIRED arguments and SET PYTHONLIBSUNIX_FOUND to TRUE IF
 178 # all listed variables are TRUE
 179 INCLUDE(FindPackageHandleStandardArgs)
 180 FIND_PACKAGE_HANDLE_STANDARD_ARGS(PythonLibsUnix  DEFAULT_MSG
 181     PYTHON_LIBRARY PYTHON_LIBPATH PYTHON_INCLUDE_DIR PYTHON_INCLUDE_CONFIG_DIR)
 182
 183 IF(PYTHONLIBSUNIX_FOUND)
 184   # Assign cache items
 185   SET(PYTHON_INCLUDE_DIRS ${PYTHON_INCLUDE_DIR} ${PYTHON_INCLUDE_CONFIG_DIR})
 186   SET(PYTHON_LIBRARIES ${PYTHON_LIBRARY})
 187
 188   # we need this for installation
 189   # XXX No more valid with debian-like py3.3 packages...
 190 #  GET_FILENAME_COMPONENT(PYTHON_LIBPATH ${PYTHON_LIBRARY} PATH)
 191
 192   # not used
 193   # SET(PYTHON_BINARY ${PYTHON_EXECUTABLE} CACHE STRING "")
 194 ENDIF()
 195
 196 MARK_AS_ADVANCED(
 197   PYTHON_INCLUDE_DIR
 198   PYTHON_INCLUDE_CONFIG_DIR
 199   PYTHON_LIBRARY
 200 )