Modules/FindPythonLibs.cmake

   1 # - Find python libraries
   2 # This module finds if Python is installed and determines where the
   3 # include files and libraries are. It also determines what the name of
   4 # the library is. This code sets the following variables:
   5 #
   6 #  PYTHONLIBS_FOUND     = have the Python libs been found
   7 #  PYTHON_LIBRARIES     = path to the python library
   8 #  PYTHON_INCLUDE_PATH  = path to where Python.h is found
   9 #  PYTHON_DEBUG_LIBRARIES = path to the debug library
  10 #
  11
  12 INCLUDE(CMakeFindFrameworks)
  13 # Search for the python framework on Apple.
  14 CMAKE_FIND_FRAMEWORKS(Python)
  15
  16 FOREACH(_CURRENT_VERSION 2.6 2.5 2.4 2.3 2.2 2.1 2.0 1.6 1.5)
  17   STRING(REPLACE "." "" _CURRENT_VERSION_NO_DOTS ${_CURRENT_VERSION})
  18   IF(WIN32)
  19     FIND_LIBRARY(PYTHON_DEBUG_LIBRARY
  20       NAMES python${_CURRENT_VERSION_NO_DOTS}_d python
  21       PATHS
  22       [HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${_CURRENT_VERSION}\\InstallPath]/libs/Debug
  23       [HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${_CURRENT_VERSION}\\InstallPath]/libs )
  24   ENDIF(WIN32)
  25
  26   FIND_LIBRARY(PYTHON_LIBRARY
  27     NAMES python${_CURRENT_VERSION_NO_DOTS} python${_CURRENT_VERSION}
  28     PATHS
  29       [HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${_CURRENT_VERSION}\\InstallPath]/libs
  30     PATH_SUFFIXES
  31       python${_CURRENT_VERSION}/config
  32     # Avoid finding the .dll in the PATH.  We want the .lib.
  33     NO_SYSTEM_ENVIRONMENT_PATH
  34   )
  35
  36   SET(PYTHON_FRAMEWORK_INCLUDES)
  37   IF(Python_FRAMEWORKS AND NOT PYTHON_INCLUDE_PATH)
  38     FOREACH(dir ${Python_FRAMEWORKS})
  39       SET(PYTHON_FRAMEWORK_INCLUDES ${PYTHON_FRAMEWORK_INCLUDES}
  40         ${dir}/Versions/${_CURRENT_VERSION}/include/python${_CURRENT_VERSION})
  41     ENDFOREACH(dir)
  42   ENDIF(Python_FRAMEWORKS AND NOT PYTHON_INCLUDE_PATH)
  43
  44   FIND_PATH(PYTHON_INCLUDE_PATH
  45     NAMES Python.h
  46     PATHS
  47       ${PYTHON_FRAMEWORK_INCLUDES}
  48       [HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${_CURRENT_VERSION}\\InstallPath]/include
  49     PATH_SUFFIXES
  50       python${_CURRENT_VERSION}
  51   )
  52
  53 ENDFOREACH(_CURRENT_VERSION)
  54
  55 MARK_AS_ADVANCED(
  56   PYTHON_DEBUG_LIBRARY
  57   PYTHON_LIBRARY
  58   PYTHON_INCLUDE_PATH
  59 )
  60
  61 # Python Should be built and installed as a Framework on OSX
  62 IF(Python_FRAMEWORKS)
  63   # If a framework has been selected for the include path,
  64   # make sure "-framework" is used to link it.
  65   IF("${PYTHON_INCLUDE_PATH}" MATCHES "Python\\.framework")
  66     SET(PYTHON_LIBRARY "")
  67     SET(PYTHON_DEBUG_LIBRARY "")
  68   ENDIF("${PYTHON_INCLUDE_PATH}" MATCHES "Python\\.framework")
  69   IF(NOT PYTHON_LIBRARY)
  70     SET (PYTHON_LIBRARY "-framework Python" CACHE FILEPATH "Python Framework" FORCE)
  71   ENDIF(NOT PYTHON_LIBRARY)
  72   IF(NOT PYTHON_DEBUG_LIBRARY)
  73     SET (PYTHON_DEBUG_LIBRARY "-framework Python" CACHE FILEPATH "Python Framework" FORCE)
  74   ENDIF(NOT PYTHON_DEBUG_LIBRARY)
  75 ENDIF(Python_FRAMEWORKS)
  76
  77 # We use PYTHON_LIBRARY and PYTHON_DEBUG_LIBRARY for the cache entries
  78 # because they are meant to specify the location of a single library.
  79 # We now set the variables listed by the documentation for this
  80 # module.
  81 SET(PYTHON_LIBRARIES "${PYTHON_LIBRARY}")
  82 SET(PYTHON_DEBUG_LIBRARIES "${PYTHON_DEBUG_LIBRARY}")
  83
  84
  85 INCLUDE(FindPackageHandleStandardArgs)
  86 FIND_PACKAGE_HANDLE_STANDARD_ARGS(PythonLibs DEFAULT_MSG PYTHON_LIBRARIES PYTHON_INCLUDE_PATH)
  87
  88
  89 # PYTHON_ADD_MODULE(<name> src1 src2 ... srcN) is used to build modules for python.
  90 # PYTHON_WRITE_MODULES_HEADER(<filename>) writes a header file you can include
  91 # in your sources to initialize the static python modules
  92
  93 GET_PROPERTY(_TARGET_SUPPORTS_SHARED_LIBS
  94   GLOBAL PROPERTY TARGET_SUPPORTS_SHARED_LIBS)
  95
  96 FUNCTION(PYTHON_ADD_MODULE _NAME )
  97   OPTION(PYTHON_ENABLE_MODULE_${_NAME} "Add module ${_NAME}" TRUE)
  98   OPTION(PYTHON_MODULE_${_NAME}_BUILD_SHARED "Add module ${_NAME} shared" ${_TARGET_SUPPORTS_SHARED_LIBS})
  99
 100   IF(PYTHON_ENABLE_MODULE_${_NAME})
 101     IF(PYTHON_MODULE_${_NAME}_BUILD_SHARED)
 102       SET(PY_MODULE_TYPE MODULE)
 103     ELSE(PYTHON_MODULE_${_NAME}_BUILD_SHARED)
 104       SET(PY_MODULE_TYPE STATIC)
 105       SET_PROPERTY(GLOBAL  APPEND  PROPERTY  PY_STATIC_MODULES_LIST ${_NAME})
 106     ENDIF(PYTHON_MODULE_${_NAME}_BUILD_SHARED)
 107
 108     SET_PROPERTY(GLOBAL  APPEND  PROPERTY  PY_MODULES_LIST ${_NAME})
 109     ADD_LIBRARY(${_NAME} ${PY_MODULE_TYPE} ${ARGN})
 110 #    TARGET_LINK_LIBRARIES(${_NAME} ${PYTHON_LIBRARIES})
 111
 112   ENDIF(PYTHON_ENABLE_MODULE_${_NAME})
 113 ENDFUNCTION(PYTHON_ADD_MODULE)
 114
 115 FUNCTION(PYTHON_WRITE_MODULES_HEADER _filename)
 116
 117   GET_PROPERTY(PY_STATIC_MODULES_LIST  GLOBAL  PROPERTY PY_STATIC_MODULES_LIST)
 118
 119   GET_FILENAME_COMPONENT(_name "${_filename}" NAME)
 120   STRING(REPLACE "." "_" _name "${_name}")
 121   STRING(TOUPPER ${_name} _name)
 122
 123   SET(_filenameTmp "${_filename}.in")
 124   FILE(WRITE ${_filenameTmp} "/*Created by cmake, do not edit, changes will be lost*/\n")
 125   FILE(APPEND ${_filenameTmp}
 126 "#ifndef ${_name}
 127 #define ${_name}
 128
 129 #include <Python.h>
 130
 131 #ifdef __cplusplus
 132 extern \"C\" {
 133 #endif /* __cplusplus */
 134
 135 ")
 136
 137   FOREACH(_currentModule ${PY_STATIC_MODULES_LIST})
 138     FILE(APPEND ${_filenameTmp} "extern void init${PYTHON_MODULE_PREFIX}${_currentModule}(void);\n\n")
 139   ENDFOREACH(_currentModule ${PY_STATIC_MODULES_LIST})
 140
 141   FILE(APPEND ${_filenameTmp}
 142 "#ifdef __cplusplus
 143 }
 144 #endif /* __cplusplus */
 145
 146 ")
 147
 148
 149   FOREACH(_currentModule ${PY_STATIC_MODULES_LIST})
 150     FILE(APPEND ${_filenameTmp} "int CMakeLoadPythonModule_${_currentModule}(void) \n{\n  static char name[]=\"${PYTHON_MODULE_PREFIX}${_currentModule}\"; return PyImport_AppendInittab(name, init${PYTHON_MODULE_PREFIX}${_currentModule});\n}\n\n")
 151   ENDFOREACH(_currentModule ${PY_STATIC_MODULES_LIST})
 152
 153   FILE(APPEND ${_filenameTmp} "#ifndef EXCLUDE_LOAD_ALL_FUNCTION\nvoid CMakeLoadAllPythonModules(void)\n{\n")
 154   FOREACH(_currentModule ${PY_STATIC_MODULES_LIST})
 155     FILE(APPEND ${_filenameTmp} "  CMakeLoadPythonModule_${_currentModule}();\n")
 156   ENDFOREACH(_currentModule ${PY_STATIC_MODULES_LIST})
 157   FILE(APPEND ${_filenameTmp} "}\n#endif\n\n#endif\n")
 158
 159 # with CONFIGURE_FILE() cmake complains that you may not use a file created using FILE(WRITE) as input file for CONFIGURE_FILE()
 160   EXECUTE_PROCESS(COMMAND ${CMAKE_COMMAND} -E copy_if_different "${_filenameTmp}" "${_filename}" OUTPUT_QUIET ERROR_QUIET)
 161
 162 ENDFUNCTION(PYTHON_WRITE_MODULES_HEADER)