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CMake/Modules/FindPythonLibs.cmake

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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
#.rst:
# FindPythonLibs
# --------------
#
# Find python libraries
#
# This module finds if Python is installed and determines where the
# include files and libraries are. It also determines what the name of
# the library is. This code sets the following variables:
#
# ::
#
# PYTHONLIBS_FOUND - have the Python libs been found
# PYTHON_LIBRARIES - path to the python library
# PYTHON_INCLUDE_PATH - path to where Python.h is found (deprecated)
# PYTHON_INCLUDE_DIRS - path to where Python.h is found
# PYTHON_DEBUG_LIBRARIES - path to the debug library (deprecated)
# PYTHONLIBS_VERSION_STRING - version of the Python libs found (since CMake 2.8.8)
#
#
#
# The Python_ADDITIONAL_VERSIONS variable can be used to specify a list
# of version numbers that should be taken into account when searching
# for Python. You need to set this variable before calling
# find_package(PythonLibs).
#
# If you'd like to specify the installation of Python to use, you should
# modify the following cache variables:
#
# ::
#
# PYTHON_LIBRARY - path to the python library
# PYTHON_INCLUDE_DIR - path to where Python.h is found
#
# If calling both ``find_package(PythonInterp)`` and
# ``find_package(PythonLibs)``, call ``find_package(PythonInterp)`` first to
# get the currently active Python version by default with a consistent version
# of PYTHON_LIBRARIES.
# Use the executable's path as a hint
set(_Python_LIBRARY_PATH_HINT)
if(PYTHON_EXECUTABLE)
if(WIN32)
get_filename_component(_Python_PREFIX ${PYTHON_EXECUTABLE} PATH)
if(_Python_PREFIX)
set(_Python_LIBRARY_PATH_HINT ${_Python_PREFIX}/libs)
endif()
unset(_Python_PREFIX)
else()
get_filename_component(_Python_PREFIX ${PYTHON_EXECUTABLE} PATH)
get_filename_component(_Python_PREFIX ${_Python_PREFIX} PATH)
if(_Python_PREFIX)
set(_Python_LIBRARY_PATH_HINT ${_Python_PREFIX}/lib)
endif()
unset(_Python_PREFIX)
endif()
endif()
include(${CMAKE_CURRENT_LIST_DIR}/CMakeFindFrameworks.cmake)
# Search for the python framework on Apple.
CMAKE_FIND_FRAMEWORKS(Python)
# Save CMAKE_FIND_FRAMEWORK
if(DEFINED CMAKE_FIND_FRAMEWORK)
set(_PythonLibs_CMAKE_FIND_FRAMEWORK ${CMAKE_FIND_FRAMEWORK})
else()
unset(_PythonLibs_CMAKE_FIND_FRAMEWORK)
endif()
# To avoid picking up the system Python.h pre-maturely.
set(CMAKE_FIND_FRAMEWORK LAST)
set(_PYTHON1_VERSIONS 1.6 1.5)
set(_PYTHON2_VERSIONS 2.7 2.6 2.5 2.4 2.3 2.2 2.1 2.0)
set(_PYTHON3_VERSIONS 3.7 3.6 3.5 3.4 3.3 3.2 3.1 3.0)
if(PythonLibs_FIND_VERSION)
if(PythonLibs_FIND_VERSION_COUNT GREATER 1)
set(_PYTHON_FIND_MAJ_MIN "${PythonLibs_FIND_VERSION_MAJOR}.${PythonLibs_FIND_VERSION_MINOR}")
unset(_PYTHON_FIND_OTHER_VERSIONS)
if(PythonLibs_FIND_VERSION_EXACT)
if(_PYTHON_FIND_MAJ_MIN STREQUAL PythonLibs_FIND_VERSION)
set(_PYTHON_FIND_OTHER_VERSIONS "${PythonLibs_FIND_VERSION}")
else()
set(_PYTHON_FIND_OTHER_VERSIONS "${PythonLibs_FIND_VERSION}" "${_PYTHON_FIND_MAJ_MIN}")
endif()
else()
foreach(_PYTHON_V ${_PYTHON${PythonLibs_FIND_VERSION_MAJOR}_VERSIONS})
if(NOT _PYTHON_V VERSION_LESS _PYTHON_FIND_MAJ_MIN)
list(APPEND _PYTHON_FIND_OTHER_VERSIONS ${_PYTHON_V})
endif()
endforeach()
endif()
unset(_PYTHON_FIND_MAJ_MIN)
else()
set(_PYTHON_FIND_OTHER_VERSIONS ${_PYTHON${PythonLibs_FIND_VERSION_MAJOR}_VERSIONS})
endif()
else()
set(_PYTHON_FIND_OTHER_VERSIONS ${_PYTHON3_VERSIONS} ${_PYTHON2_VERSIONS} ${_PYTHON1_VERSIONS})
endif()
# Set up the versions we know about, in the order we will search. Always add
# the user supplied additional versions to the front.
# If FindPythonInterp has already found the major and minor version,
# insert that version between the user supplied versions and the stock
# version list.
set(_Python_VERSIONS ${Python_ADDITIONAL_VERSIONS})
if(DEFINED PYTHON_VERSION_MAJOR AND DEFINED PYTHON_VERSION_MINOR)
list(APPEND _Python_VERSIONS ${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR})
endif()
list(APPEND _Python_VERSIONS ${_PYTHON_FIND_OTHER_VERSIONS})
unset(_PYTHON_FIND_OTHER_VERSIONS)
unset(_PYTHON1_VERSIONS)
unset(_PYTHON2_VERSIONS)
unset(_PYTHON3_VERSIONS)
foreach(_CURRENT_VERSION ${_Python_VERSIONS})
string(REPLACE "." "" _CURRENT_VERSION_NO_DOTS ${_CURRENT_VERSION})
if(WIN32)
find_library(PYTHON_DEBUG_LIBRARY
NAMES python${_CURRENT_VERSION_NO_DOTS}_d python
HINTS ${_Python_LIBRARY_PATH_HINT}
PATHS
[HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${_CURRENT_VERSION}\\InstallPath]/libs/Debug
[HKEY_CURRENT_USER\\SOFTWARE\\Python\\PythonCore\\${_CURRENT_VERSION}\\InstallPath]/libs/Debug
[HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${_CURRENT_VERSION}\\InstallPath]/libs
[HKEY_CURRENT_USER\\SOFTWARE\\Python\\PythonCore\\${_CURRENT_VERSION}\\InstallPath]/libs
)
endif()
set(PYTHON_FRAMEWORK_LIBRARIES)
if(Python_FRAMEWORKS AND NOT PYTHON_LIBRARY)
foreach(dir ${Python_FRAMEWORKS})
list(APPEND PYTHON_FRAMEWORK_LIBRARIES
${dir}/Versions/${_CURRENT_VERSION}/lib)
endforeach()
endif()
find_library(PYTHON_LIBRARY
NAMES
python${_CURRENT_VERSION_NO_DOTS}
python${_CURRENT_VERSION}mu
python${_CURRENT_VERSION}m
python${_CURRENT_VERSION}u
python${_CURRENT_VERSION}
HINTS
${_Python_LIBRARY_PATH_HINT}
PATHS
${PYTHON_FRAMEWORK_LIBRARIES}
[HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${_CURRENT_VERSION}\\InstallPath]/libs
[HKEY_CURRENT_USER\\SOFTWARE\\Python\\PythonCore\\${_CURRENT_VERSION}\\InstallPath]/libs
# Avoid finding the .dll in the PATH. We want the .lib.
NO_SYSTEM_ENVIRONMENT_PATH
)
# Look for the static library in the Python config directory
find_library(PYTHON_LIBRARY
NAMES python${_CURRENT_VERSION_NO_DOTS} python${_CURRENT_VERSION}
# Avoid finding the .dll in the PATH. We want the .lib.
NO_SYSTEM_ENVIRONMENT_PATH
# This is where the static library is usually located
PATH_SUFFIXES python${_CURRENT_VERSION}/config
)
# Don't search for include dir until library location is known
if(PYTHON_LIBRARY)
# Use the library's install prefix as a hint
set(_Python_INCLUDE_PATH_HINT)
get_filename_component(_Python_PREFIX ${PYTHON_LIBRARY} PATH)
get_filename_component(_Python_PREFIX ${_Python_PREFIX} PATH)
if(_Python_PREFIX)
set(_Python_INCLUDE_PATH_HINT ${_Python_PREFIX}/include)
endif()
unset(_Python_PREFIX)
# Add framework directories to the search paths
set(PYTHON_FRAMEWORK_INCLUDES)
if(Python_FRAMEWORKS AND NOT PYTHON_INCLUDE_DIR)
foreach(dir ${Python_FRAMEWORKS})
list(APPEND PYTHON_FRAMEWORK_INCLUDES
${dir}/Versions/${_CURRENT_VERSION}/include)
endforeach()
endif()
find_path(PYTHON_INCLUDE_DIR
NAMES Python.h
HINTS
${_Python_INCLUDE_PATH_HINT}
PATHS
${PYTHON_FRAMEWORK_INCLUDES}
[HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${_CURRENT_VERSION}\\InstallPath]/include
[HKEY_CURRENT_USER\\SOFTWARE\\Python\\PythonCore\\${_CURRENT_VERSION}\\InstallPath]/include
PATH_SUFFIXES
python${_CURRENT_VERSION}mu
python${_CURRENT_VERSION}m
python${_CURRENT_VERSION}u
python${_CURRENT_VERSION}
)
endif()
# For backward compatibility, set PYTHON_INCLUDE_PATH.
set(PYTHON_INCLUDE_PATH "${PYTHON_INCLUDE_DIR}")
if(PYTHON_INCLUDE_DIR AND EXISTS "${PYTHON_INCLUDE_DIR}/patchlevel.h")
file(STRINGS "${PYTHON_INCLUDE_DIR}/patchlevel.h" python_version_str
REGEX "^#define[ \t]+PY_VERSION[ \t]+\"[^\"]+\"")
string(REGEX REPLACE "^#define[ \t]+PY_VERSION[ \t]+\"([^\"]+)\".*" "\\1"
PYTHONLIBS_VERSION_STRING "${python_version_str}")
unset(python_version_str)
endif()
if(PYTHON_LIBRARY AND PYTHON_INCLUDE_DIR)
break()
endif()
endforeach()
unset(_Python_INCLUDE_PATH_HINT)
unset(_Python_LIBRARY_PATH_HINT)
mark_as_advanced(
PYTHON_DEBUG_LIBRARY
PYTHON_LIBRARY
PYTHON_INCLUDE_DIR
)
# We use PYTHON_INCLUDE_DIR, PYTHON_LIBRARY and PYTHON_DEBUG_LIBRARY for the
# cache entries because they are meant to specify the location of a single
# library. We now set the variables listed by the documentation for this
# module.
set(PYTHON_INCLUDE_DIRS "${PYTHON_INCLUDE_DIR}")
set(PYTHON_DEBUG_LIBRARIES "${PYTHON_DEBUG_LIBRARY}")
# These variables have been historically named in this module different from
# what SELECT_LIBRARY_CONFIGURATIONS() expects.
set(PYTHON_LIBRARY_DEBUG "${PYTHON_DEBUG_LIBRARY}")
set(PYTHON_LIBRARY_RELEASE "${PYTHON_LIBRARY}")
include(${CMAKE_CURRENT_LIST_DIR}/SelectLibraryConfigurations.cmake)
SELECT_LIBRARY_CONFIGURATIONS(PYTHON)
# SELECT_LIBRARY_CONFIGURATIONS() sets ${PREFIX}_FOUND if it has a library.
# Unset this, this prefix doesn't match the module prefix, they are different
# for historical reasons.
unset(PYTHON_FOUND)
# Restore CMAKE_FIND_FRAMEWORK
if(DEFINED _PythonLibs_CMAKE_FIND_FRAMEWORK)
set(CMAKE_FIND_FRAMEWORK ${_PythonLibs_CMAKE_FIND_FRAMEWORK})
unset(_PythonLibs_CMAKE_FIND_FRAMEWORK)
else()
unset(CMAKE_FIND_FRAMEWORK)
endif()
include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(PythonLibs
REQUIRED_VARS PYTHON_LIBRARIES PYTHON_INCLUDE_DIRS
VERSION_VAR PYTHONLIBS_VERSION_STRING)
# PYTHON_ADD_MODULE(<name> src1 src2 ... srcN) is used to build modules for python.
# PYTHON_WRITE_MODULES_HEADER(<filename>) writes a header file you can include
# in your sources to initialize the static python modules
function(PYTHON_ADD_MODULE _NAME )
get_property(_TARGET_SUPPORTS_SHARED_LIBS
GLOBAL PROPERTY TARGET_SUPPORTS_SHARED_LIBS)
option(PYTHON_ENABLE_MODULE_${_NAME} "Add module ${_NAME}" TRUE)
option(PYTHON_MODULE_${_NAME}_BUILD_SHARED
"Add module ${_NAME} shared" ${_TARGET_SUPPORTS_SHARED_LIBS})
# Mark these options as advanced
mark_as_advanced(PYTHON_ENABLE_MODULE_${_NAME}
PYTHON_MODULE_${_NAME}_BUILD_SHARED)
if(PYTHON_ENABLE_MODULE_${_NAME})
if(PYTHON_MODULE_${_NAME}_BUILD_SHARED)
set(PY_MODULE_TYPE MODULE)
else()
set(PY_MODULE_TYPE STATIC)
set_property(GLOBAL APPEND PROPERTY PY_STATIC_MODULES_LIST ${_NAME})
endif()
set_property(GLOBAL APPEND PROPERTY PY_MODULES_LIST ${_NAME})
add_library(${_NAME} ${PY_MODULE_TYPE} ${ARGN})
# target_link_libraries(${_NAME} ${PYTHON_LIBRARIES})
if(PYTHON_MODULE_${_NAME}_BUILD_SHARED)
set_target_properties(${_NAME} PROPERTIES PREFIX "${PYTHON_MODULE_PREFIX}")
if(WIN32 AND NOT CYGWIN)
set_target_properties(${_NAME} PROPERTIES SUFFIX ".pyd")
endif()
endif()
endif()
endfunction()
function(PYTHON_WRITE_MODULES_HEADER _filename)
get_property(PY_STATIC_MODULES_LIST GLOBAL PROPERTY PY_STATIC_MODULES_LIST)
get_filename_component(_name "${_filename}" NAME)
string(REPLACE "." "_" _name "${_name}")
string(TOUPPER ${_name} _nameUpper)
set(_filename ${CMAKE_CURRENT_BINARY_DIR}/${_filename})
set(_filenameTmp "${_filename}.in")
file(WRITE ${_filenameTmp} "/*Created by cmake, do not edit, changes will be lost*/\n")
file(APPEND ${_filenameTmp}
"#ifndef ${_nameUpper}
#define ${_nameUpper}
#include <Python.h>
#ifdef __cplusplus
extern \"C\" {
#endif /* __cplusplus */
")
foreach(_currentModule ${PY_STATIC_MODULES_LIST})
file(APPEND ${_filenameTmp} "extern void init${PYTHON_MODULE_PREFIX}${_currentModule}(void);\n\n")
endforeach()
file(APPEND ${_filenameTmp}
"#ifdef __cplusplus
}
#endif /* __cplusplus */
")
foreach(_currentModule ${PY_STATIC_MODULES_LIST})
file(APPEND ${_filenameTmp} "int ${_name}_${_currentModule}(void) \n{\n static char name[]=\"${PYTHON_MODULE_PREFIX}${_currentModule}\"; return PyImport_AppendInittab(name, init${PYTHON_MODULE_PREFIX}${_currentModule});\n}\n\n")
endforeach()
file(APPEND ${_filenameTmp} "void ${_name}_LoadAllPythonModules(void)\n{\n")
foreach(_currentModule ${PY_STATIC_MODULES_LIST})
file(APPEND ${_filenameTmp} " ${_name}_${_currentModule}();\n")
endforeach()
file(APPEND ${_filenameTmp} "}\n\n")
file(APPEND ${_filenameTmp} "#ifndef EXCLUDE_LOAD_ALL_FUNCTION\nvoid CMakeLoadAllPythonModules(void)\n{\n ${_name}_LoadAllPythonModules();\n}\n#endif\n\n#endif\n")
# with configure_file() cmake complains that you may not use a file created using file(WRITE) as input file for configure_file()
execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different "${_filenameTmp}" "${_filename}" OUTPUT_QUIET ERROR_QUIET)
endfunction()
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