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SetupPython.cmake
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SetupPython.cmake
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macro(SetupPython)
# -------------------------------- Python --------------------------------
# For building on OS X
if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin" AND NOT BUILD_WITH_CONDA)
# If the user doesn't tell us which package manager they're using
if(NOT DEFINED MACPORTS_PREFIX AND NOT DEFINED HOMEBREW_PREFIX)
# Try to find MacPorts path
find_program(MACPORTS_EXECUTABLE port)
if(EXISTS ${MACPORTS_EXECUTABLE})
string(REPLACE "/bin/port" ""
MACPORTS_PREFIX ${MACPORTS_EXECUTABLE})
message(STATUS "Detected MacPorts install at ${MACPORTS_PREFIX}")
endif(EXISTS ${MACPORTS_EXECUTABLE})
# Try to find Homebrew path
find_program(HOMEBREW_EXECUTABLE brew)
if(EXISTS ${HOMEBREW_EXECUTABLE})
string(REPLACE "/bin/brew" ""
HOMEBREW_PREFIX ${HOMEBREW_EXECUTABLE})
message(STATUS "Detected Homebrew install at ${HOMEBREW_PREFIX}")
endif()
endif(NOT DEFINED MACPORTS_PREFIX AND NOT DEFINED HOMEBREW_PREFIX)
# In case someone tries to shoot themselves in the foot
if(DEFINED MACPORTS_PREFIX AND DEFINED HOMEBREW_PREFIX)
message(SEND_ERROR
"Multiple package management systems detected - ")
message(SEND_ERROR
"define either MACPORTS_PREFIX or HOMEBREW_PREFIX")
# No package manager
elseif(NOT DEFINED MACPORTS_PREFIX AND NOT DEFINED HOMEBREW_PREFIX)
message(SEND_ERROR
"No package manager detected - install MacPorts or Homebrew")
# The hopefully-normal case - one package manager identified
else(DEFINED MACPORTS_PREFIX AND DEFINED HOMEBREW_PREFIX)
# Construct a list like python;python2.9;python2.8;...
set(Python_ADDITIONAL_VERSIONS_REV ${Python_ADDITIONAL_VERSIONS})
list(REVERSE Python_ADDITIONAL_VERSIONS_REV)
set(_PYTHON_NAMES "python")
foreach(_PYTHON_VERSION IN LISTS Python_ADDITIONAL_VERSIONS_REV)
list(APPEND _PYTHON_NAMES "python${_PYTHON_VERSION}")
endforeach(_PYTHON_VERSION)
# Find python in the package management systems, using names in that
# list in decreasing priority. Note that a manually specified
# PYTHON_EXECUTABLE still has prescedence over this.
find_program(PYTHON_EXECUTABLE
NAMES ${_PYTHON_NAMES}
PATHS ${MACPORTS_PREFIX} ${HOMEBREW_PREFIX}
PATH_SUFFIXES /bin
NO_DEFAULT_PATH)
endif(DEFINED MACPORTS_PREFIX AND DEFINED HOMEBREW_PREFIX)
# Warn user if we still only have the system Python
string(FIND ${PYTHON_EXECUTABLE} "/usr/bin/python" _FIND_SYS_PYTHON)
if(_FIND_SYS_PYTHON EQUAL 0)
message(SEND_ERROR
"Only found the stock Python, that's probably bad.")
endif(_FIND_SYS_PYTHON EQUAL 0)
# Ask Python to tell us it's include directory, if nobody else has
if(NOT DEFINED PYTHON_INCLUDE_DIR)
execute_process(COMMAND ${PYTHON_EXECUTABLE} -c
"from distutils.sysconfig import get_python_inc;print(get_python_inc())"
OUTPUT_VARIABLE PYTHON_INCLUDE_DIR
RESULT_VARIABLE PYTHON_INCLUDE_DIR_RESULT
ERROR_QUIET)
if(NOT PYTHON_INCLUDE_DIR_RESULT MATCHES 0)
message(SEND_ERROR "Failed to determine PYTHON_INCLUDE_DIR")
endif(NOT PYTHON_INCLUDE_DIR_RESULT MATCHES 0)
endif(NOT DEFINED PYTHON_INCLUDE_DIR)
# Similar for the Python library - there must be an easier way...
if(NOT DEFINED PYTHON_LIBRARY)
# Get the library path
execute_process(COMMAND "${PYTHON_EXECUTABLE}" -c
"from distutils import sysconfig;print(sysconfig.get_config_var('LIBDIR'))"
OUTPUT_VARIABLE PYTHON_LIBRARY_DIR
RESULT_VARIABLE PYTHON_LIBRARY_DIR_RESULT
ERROR_QUIET)
string(STRIP ${PYTHON_LIBRARY_DIR} PYTHON_LIBRARY_DIR)
if(NOT PYTHON_LIBRARY_DIR_RESULT MATCHES 0)
message(SEND_ERROR "Failed to determine PYTHON_LIBRARY")
endif(NOT PYTHON_LIBRARY_DIR_RESULT MATCHES 0)
# Get library filename - might not be safe to assume .dylib extension?
execute_process(COMMAND "${PYTHON_EXECUTABLE}" -c
"import sys;print('libpython%d.%d.dylib'%sys.version_info[0:2])"
OUTPUT_VARIABLE PYTHON_LIBRARY_FILE
RESULT_VARIABLE PYTHON_LIBRARY_FILE_RESULT
ERROR_QUIET)
string(STRIP ${PYTHON_LIBRARY_FILE} PYTHON_LIBRARY_FILE)
if(NOT PYTHON_LIBRARY_FILE_RESULT MATCHES 0)
message(SEND_ERROR "Failed to determine PYTHON_LIBRARY")
endif(NOT PYTHON_LIBRARY_FILE_RESULT MATCHES 0)
set(PYTHON_LIBRARY "${PYTHON_LIBRARY_DIR}/${PYTHON_LIBRARY_FILE}")
else(NOT DEFINED PYTHON_LIBRARY)
# Used on MacPorts systems for finding Shiboken and PySide
# TODO: When we start requiring minimum CMake version above
# 2.8.11, change PATH below to DIRECTORY
get_filename_component(PYTHON_LIBRARY_DIR ${PYTHON_LIBRARY} PATH)
endif(NOT DEFINED PYTHON_LIBRARY)
endif(${CMAKE_SYSTEM_NAME} MATCHES "Darwin" AND NOT BUILD_WITH_CONDA)
if(${CMAKE_VERSION} VERSION_LESS "3.12")
set(Python_ADDITIONAL_VERSIONS ${Python_ADDITIONAL_VERSIONS} "3.10" "3.9" "3.8" "3.7" "3.6")
find_package(PythonInterp REQUIRED)
set(Python_ADDITIONAL_VERSIONS ${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR})
if (NOT DEFINED PYTHON_VERSION_STRING)
find_package(PythonLibs REQUIRED)
else (NOT DEFINED PYTHON_VERSION_STRING)
find_package(PythonLibs ${PYTHON_VERSION_STRING} EXACT)
endif(NOT DEFINED PYTHON_VERSION_STRING)
if(NOT PYTHONLIBS_FOUND)
message(FATAL_ERROR "=================================\n"
"Python not found, install Python!\n"
"=================================\n")
endif()
# For forward compatibility with new CMake scripts
set(Python3_EXECUTABLE ${PYTHON_EXECUTABLE})
set(Python3_LIBRARIES ${PYTHON_LIBRARIES})
set(Python3_INCLUDE_DIRS ${PYTHON_INCLUDE_DIRS})
set(Python3_LIBRARY_DIRS ${PYTHON_LIBRARY_DIRS})
set(Python3_VERSION ${PYTHON_VERSION_STRING})
set(Python3_VERSION_MAJOR ${PYTHON_VERSION_MAJOR})
set(Python3_VERSION_MINOR ${PYTHON_VERSION_MINOR})
set(Python3_VERSION_PATCH ${PYTHON_VERSION_PATCH})
else()
find_package(Python3 COMPONENTS Interpreter Development REQUIRED)
# For backwards compatibility with old CMake scripts
set(PYTHON_EXECUTABLE ${Python3_EXECUTABLE})
set(PYTHON_LIBRARIES ${Python3_LIBRARIES})
set(PYTHON_INCLUDE_DIRS ${Python3_INCLUDE_DIRS})
set(PYTHON_LIBRARY_DIRS ${Python3_LIBRARY_DIRS})
set(PYTHON_VERSION_STRING ${Python3_VERSION})
set(PYTHON_VERSION_MAJOR ${Python3_VERSION_MAJOR})
set(PYTHON_VERSION_MINOR ${Python3_VERSION_MINOR})
set(PYTHON_VERSION_PATCH ${Python3_VERSION_PATCH})
endif()
# prevent python3 lower than 3.6
if (${PYTHON_VERSION_STRING} VERSION_LESS "3.6")
message(FATAL_ERROR "To build FreeCAD you need at least Python 3.6\n")
endif()
endmacro(SetupPython)