cmake/OpenCVDetectPython.cmake

   1 if(WIN32 AND NOT PYTHON_EXECUTABLE)
   2   # search for executable with the same bitness as resulting binaries
   3   # standard FindPythonInterp always prefers executable from system path
   4   # this is really important because we are using the interpreter for numpy search and for choosing the install location
   5   foreach(_CURRENT_VERSION ${Python_ADDITIONAL_VERSIONS} 2.7 "${MIN_VER_PYTHON}")
   6     find_host_program(PYTHON_EXECUTABLE
   7       NAMES python${_CURRENT_VERSION} python
   8       PATHS
   9         [HKEY_LOCAL_MACHINE\\\\SOFTWARE\\\\Python\\\\PythonCore\\\\${_CURRENT_VERSION}\\\\InstallPath]
  10         [HKEY_CURRENT_USER\\\\SOFTWARE\\\\Python\\\\PythonCore\\\\${_CURRENT_VERSION}\\\\InstallPath]
  11       NO_SYSTEM_ENVIRONMENT_PATH
  12     )
  13   endforeach()
  14 endif()
  15 find_host_package(PythonInterp 2.7)
  16 if(NOT PYTHONINTERP_FOUND)
  17 find_host_package(PythonInterp "${MIN_VER_PYTHON}")
  18 endif()
  19
  20 unset(HAVE_SPHINX CACHE)
  21
  22 if(PYTHONINTERP_FOUND)
  23   set(PYTHON_VERSION_MAJOR_MINOR "${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}")
  24
  25   if(NOT ANDROID AND NOT IOS)
  26     ocv_check_environment_variables(PYTHON_LIBRARY PYTHON_INCLUDE_DIR)
  27     find_host_package(PythonLibs "${PYTHON_VERSION_STRING}" EXACT)
  28   endif()
  29
  30   if(NOT ANDROID AND NOT IOS)
  31     if(CMAKE_HOST_UNIX)
  32       execute_process(COMMAND ${PYTHON_EXECUTABLE} -c "from distutils.sysconfig import *; print(get_python_lib())"
  33                       RESULT_VARIABLE PYTHON_CVPY_PROCESS
  34                       OUTPUT_VARIABLE PYTHON_STD_PACKAGES_PATH
  35                       OUTPUT_STRIP_TRAILING_WHITESPACE)
  36       if("${PYTHON_STD_PACKAGES_PATH}" MATCHES "site-packages")
  37         set(_PYTHON_PACKAGES_PATH "python${PYTHON_VERSION_MAJOR_MINOR}/site-packages")
  38       else() #debian based assumed, install to the dist-packages.
  39         set(_PYTHON_PACKAGES_PATH "python${PYTHON_VERSION_MAJOR_MINOR}/dist-packages")
  40       endif()
  41       if(EXISTS "${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX}/${PYTHON_PACKAGES_PATH}")
  42         set(_PYTHON_PACKAGES_PATH "lib${LIB_SUFFIX}/${_PYTHON_PACKAGES_PATH}")
  43       else()
  44         set(_PYTHON_PACKAGES_PATH "lib/${_PYTHON_PACKAGES_PATH}")
  45       endif()
  46     elseif(CMAKE_HOST_WIN32)
  47       get_filename_component(PYTHON_PATH "${PYTHON_EXECUTABLE}" PATH)
  48       file(TO_CMAKE_PATH "${PYTHON_PATH}" PYTHON_PATH)
  49       if(NOT EXISTS "${PYTHON_PATH}/Lib/site-packages")
  50         unset(PYTHON_PATH)
  51         get_filename_component(PYTHON_PATH "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${PYTHON_VERSION_MAJOR_MINOR}\\InstallPath]" ABSOLUTE)
  52         if(NOT PYTHON_PATH)
  53            get_filename_component(PYTHON_PATH "[HKEY_CURRENT_USER\\SOFTWARE\\Python\\PythonCore\\${PYTHON_VERSION_MAJOR_MINOR}\\InstallPath]" ABSOLUTE)
  54         endif()
  55         file(TO_CMAKE_PATH "${PYTHON_PATH}" PYTHON_PATH)
  56       endif()
  57       set(_PYTHON_PACKAGES_PATH "${PYTHON_PATH}/Lib/site-packages")
  58     endif()
  59     SET(PYTHON_PACKAGES_PATH "${_PYTHON_PACKAGES_PATH}" CACHE PATH "Where to install the python packages.")
  60
  61     if(NOT PYTHON_NUMPY_INCLUDE_DIRS)
  62       # Attempt to discover the NumPy include directory. If this succeeds, then build python API with NumPy
  63       execute_process(COMMAND "${PYTHON_EXECUTABLE}" -c
  64                         "import os; os.environ['DISTUTILS_USE_SDK']='1'; import numpy.distutils; print(os.pathsep.join(numpy.distutils.misc_util.get_numpy_include_dirs()))"
  65                       RESULT_VARIABLE PYTHON_NUMPY_PROCESS
  66                       OUTPUT_VARIABLE PYTHON_NUMPY_INCLUDE_DIRS
  67                       OUTPUT_STRIP_TRAILING_WHITESPACE)
  68
  69       if(PYTHON_NUMPY_PROCESS EQUAL 0)
  70         file(TO_CMAKE_PATH "${PYTHON_NUMPY_INCLUDE_DIRS}" _PYTHON_NUMPY_INCLUDE_DIRS)
  71         set(PYTHON_NUMPY_INCLUDE_DIRS "${_PYTHON_NUMPY_INCLUDE_DIRS}" CACHE PATH "Path to numpy headers")
  72       endif()
  73     endif()
  74
  75     if(PYTHON_NUMPY_INCLUDE_DIRS)
  76       execute_process(COMMAND "${PYTHON_EXECUTABLE}" -c "import numpy; print(numpy.version.version)"
  77                       OUTPUT_VARIABLE PYTHON_NUMPY_VERSION
  78                       OUTPUT_STRIP_TRAILING_WHITESPACE)
  79     endif()
  80   endif(NOT ANDROID AND NOT IOS)
  81 endif()
  82
  83 if(BUILD_DOCS)
  84   find_host_program(SPHINX_BUILD sphinx-build)
  85   find_host_program(PLANTUML plantuml)
  86   if(SPHINX_BUILD)
  87       execute_process(COMMAND "${SPHINX_BUILD}"
  88                       OUTPUT_QUIET
  89                       ERROR_VARIABLE SPHINX_OUTPUT
  90                       OUTPUT_STRIP_TRAILING_WHITESPACE)
  91       if(SPHINX_OUTPUT MATCHES "Sphinx v([0-9][^ \n]*)")
  92         set(SPHINX_VERSION "${CMAKE_MATCH_1}")
  93         set(HAVE_SPHINX 1)
  94         message(STATUS "Found Sphinx ${SPHINX_VERSION}: ${SPHINX_BUILD}")
  95       endif()
  96   endif()
  97 endif(BUILD_DOCS)