1 # Copyright (C) 2013 CEA/DEN, EDF R&D, OPEN CASCADE
3 # This library is free software; you can redistribute it and/or
4 # modify it under the terms of the GNU Lesser General Public
5 # License as published by the Free Software Foundation; either
6 # version 2.1 of the License.
8 # This library is distributed in the hope that it will be useful,
9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 # Lesser General Public License for more details.
13 # You should have received a copy of the GNU Lesser General Public
14 # License along with this library; if not, write to the Free Software
15 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 # See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
19 # Author: Adrien Bruneton
22 # Python libraries and interpreter detection for libBatch
23 # The interpreter is found first, and if OK, the corresponding libraries are searched.
24 # We ensure the version of the libraries matches the one of the interpreter.
27 # 1. Load environment or any previously detected Python
28 IF(DEFINED ENV{PYTHON_ROOT_DIR})
29 FILE(TO_CMAKE_PATH "$ENV{PYTHON_ROOT_DIR}" _PYTHON_ROOT_DIR_ENV)
30 SET(_dflt_value "${_PYTHON_ROOT_DIR_ENV}")
32 # will be blank if no Python was previously loaded
33 SET(_dflt_value "${PYTHON_ROOT_DIR_EXP}")
37 SET(PYTHON_ROOT_DIR "${_dflt_value}" CACHE PATH "Path to Python directory (interpreter and libs)")
39 # 2. Find package - config mode first (i.e. looking for XYZ-config.cmake)
40 IF(EXISTS "${PYTHON_ROOT_DIR}")
41 # Hope to find direclty a CMake config file there
42 SET(_CONF_DIR "${PYTHON_ROOT_DIR}/share/cmake")
44 # Try find_package in config mode with a hard-coded guess. This
46 FIND_PACKAGE(Python CONFIG QUIET PATHS "${_CONF_DIR}")
47 MARK_AS_ADVANCED(Python_DIR)
50 LIST(APPEND CMAKE_PREFIX_PATH "${PYTHON_ROOT_DIR}")
52 MESSAGE(STATUS "Found Python in CONFIG mode!")
56 # Otherwise try the standard way (module mode, with the standard CMake Find*** macro):
57 SALOME_FIND_PACKAGE(LibbatchPython PythonInterp MODULE)
58 SET(_found1 ${PYTHONINTERP_FOUND})
60 IF (PYTHONINTERP_FOUND)
61 # Now ensure we find the Python libraries matching the interpreter:
62 # This uses the variable PYTHON_EXECUTABLE
63 GET_FILENAME_COMPONENT(_python_dir "${PYTHON_EXECUTABLE}" PATH)
64 GET_FILENAME_COMPONENT(CMAKE_INCLUDE_PATH "${_python_dir}/../include/python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}" ABSOLUTE)
65 GET_FILENAME_COMPONENT(CMAKE_LIBRARY_PATH "${_python_dir}/../lib" ABSOLUTE)
66 # For a Windows install, this might look more like this:
68 LIST(APPEND CMAKE_LIBRARY_PATH "${_python_dir}/libs" ABSOLUTE)
69 LIST(APPEND CMAKE_INCLUDE_PATH "${_python_dir}/include" ABSOLUTE)
71 # Override the EXACT and VERSION settings of the LibbatchPython module
72 # to force the next call to SALOME_FIND_PACKAGE() to find the exact matching
74 SET(_old_EXACT ${LibbatchPython_FIND_VERSION_EXACT})
75 SET(_old_VERSION "${LibbatchPython_FIND_VERSION}")
76 SET(LibbatchPython_FIND_VERSION_EXACT TRUE)
77 SET(LibbatchPython_FIND_VERSION "${PYTHON_VERSION_STRING}")
78 # Prepare call to FIND_PACKAGE(PythonLibs) and ensure priority is given to
79 # the location found for the interpreter:
80 GET_FILENAME_COMPONENT(_tmp "${_python_dir}" PATH)
81 # SET(PYTHON_LIBRARY ${_tmp}/lib)
82 # SET(PYTHON_INCLUDE_DIR ${_tmp}/include)
83 SALOME_FIND_PACKAGE(LibbatchPython PythonLibs MODULE)
85 SET(LibbatchPython_FIND_VERSION_EXACT ${_old_EXACT})
86 SET(LibbatchPython_FIND_VERSION "${_old_VERSION}")
89 # Set the FOUND flag for LibbatchPython:
90 SET(LIBBATCHPYTHON_FOUND FALSE)
91 IF (_found1 AND PYTHONLIBS_FOUND)
92 SET(LIBBATCHPYTHON_FOUND TRUE)
95 IF (LIBBATCHPYTHON_FOUND)
96 MESSAGE(STATUS "Python interpreter and Python libraries found:")
97 MESSAGE(STATUS "Python libraries: ${PYTHON_LIBRARY}")
98 MESSAGE(STATUS "Python include dir: ${PYTHON_INCLUDE_DIR}")
100 # 3. Set the root dir which was finally retained
101 # For Python this is the grand-parent of the
103 GET_FILENAME_COMPONENT(_tmp_ROOT_DIR "${PYTHON_INCLUDE_DIR}" PATH)
105 GET_FILENAME_COMPONENT(_tmp_ROOT_DIR "${_tmp_ROOT_DIR}" PATH)
108 # 4. Warn if CMake found something not located under ENV(XYZ_ROOT_DIR)
109 IF(DEFINED ENV{PYTHON_ROOT_DIR})
110 SALOME_CHECK_EQUAL_PATHS(_res "${_tmp_ROOT_DIR}" "${_PYTHON_ROOT_DIR_ENV}")
112 MESSAGE(WARNING "Python was found, but not a the path given by the "
113 "environment PYTHON_ROOT_DIR! Is the variable correctly set?")
115 MESSAGE(STATUS "Python found directory matches what was specified in the PYTHON_ROOT_DIR, all good!")
119 # 5. Conflict detection
120 # 5.1 From another prerequisite using Python
121 IF(PYTHON_ROOT_DIR_EXP)
122 SALOME_CHECK_EQUAL_PATHS(_res "${_tmp_ROOT_DIR}" "${PYTHON_ROOT_DIR_EXP}")
124 MESSAGE(WARNING "Warning: Python: detected version conflicts with a previously found Python!"
125 "The two paths are " ${_tmp_ROOT_DIR} " vs " ${PYTHON_ROOT_DIR_EXP})
127 MESSAGE(STATUS "Python directory matches what was previously exposed by another prereq, all good!")
131 # 6. Finally retained variable:
132 SET(PYTHON_ROOT_DIR "${_tmp_ROOT_DIR}")
136 ELSE(LIBBATCHPYTHON_FOUND)
137 MESSAGE(STATUS "Python was only partially (or not at all) found .")
138 ENDIF(LIBBATCHPYTHON_FOUND)