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#
# Copyright 2010-2011 Ettus Research LLC
# Copyright 2018 Ettus Research, a National Instruments Company
# Copyright 2019 Ettus Research, a National Instruments Company
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
if (POLICY CMP0094)
# See https://cmake.org/cmake/help/v3.15/policy/CMP0094.html
# set Python3_FIND_STRATEGY to LOCATION - this ensures that Python from
# sysroot is used first when cross-compiling
# note: policy CMP0094 is available starting with CMake 3.15
cmake_policy(SET CMP0094 NEW)
endif()
if(NOT DEFINED INCLUDED_UHD_PYTHON_CMAKE)
set(INCLUDED_UHD_PYTHON_CMAKE TRUE)
########################################################################
# Setup Python Part 1: Find the interpreters
########################################################################
message(STATUS "")
message(STATUS "Configuring the Python interpreter...")
#this allows the user to override PYTHON_EXECUTABLE
if(PYTHON_EXECUTABLE)
set(PYTHONINTERP_FOUND TRUE)
endif(PYTHON_EXECUTABLE)
if(NOT PYTHONINTERP_FOUND)
find_package(Python3 ${PYTHON_MIN_VERSION} QUIET)
if(Python3_Interpreter_FOUND)
set(PYTHON_VERSION ${Python3_VERSION})
set(PYTHON_EXECUTABLE ${Python3_EXECUTABLE})
set(PYTHONINTERP_FOUND TRUE)
endif(Python3_Interpreter_FOUND)
endif(NOT PYTHONINTERP_FOUND)
if(NOT PYTHONINTERP_FOUND)
find_package(PythonInterp ${PYTHON_MIN_VERSION} QUIET)
if(PYTHONINTERP_FOUND)
set(PYTHON_VERSION ${PYTHON_VERSION_STRING})
endif(PYTHONINTERP_FOUND)
endif(NOT PYTHONINTERP_FOUND)
# If that fails, try using the build-in find program routine.
if(NOT PYTHONINTERP_FOUND)
message(STATUS "Attempting to find Python without CMake...")
find_program(PYTHON_EXECUTABLE NAMES python3 python3.6 python3.7 python3.8 python3.9)
if(PYTHON_EXECUTABLE)
set(PYTHONINTERP_FOUND TRUE)
endif(PYTHON_EXECUTABLE)
endif(NOT PYTHONINTERP_FOUND)
if(NOT PYTHON_VERSION)
message(STATUS "Manually determining build Python version...")
execute_process(COMMAND ${PYTHON_EXECUTABLE} -c "
import sys
print('{}.{}.{}'.format(
sys.version_info.major,
sys.version_info.minor,
sys.version_info.micro))"
OUTPUT_VARIABLE PYTHON_VERSION
OUTPUT_STRIP_TRAILING_WHITESPACE)
endif(NOT PYTHON_VERSION)
# If we still haven't found a Python interpreter, then we're done.
if(NOT PYTHONINTERP_FOUND)
message(FATAL_ERROR "Error: Python interpreter required by the build system.")
endif(NOT PYTHONINTERP_FOUND)
if(NOT PYTHON_EXECUTABLE)
message(FATAL_ERROR "Error: Python interpreter required by the build system.")
endif(NOT PYTHON_EXECUTABLE)
#make the path to the executable appear in the cmake gui
set(PYTHON_EXECUTABLE ${PYTHON_EXECUTABLE} CACHE FILEPATH
"python buildtime interpreter")
message(STATUS "Python interpreter: ${PYTHON_EXECUTABLE} Version: ${PYTHON_VERSION}")
message(STATUS "Override with: -DPYTHON_EXECUTABLE=<path-to-python>")
#this allows the user to override RUNTIME_PYTHON_EXECUTABLE
if(NOT RUNTIME_PYTHON_EXECUTABLE)
if(CMAKE_CROSSCOMPILING)
message(STATUS "Cross compiling, setting python runtime to /usr/bin/python3")
message(STATUS "and interpreter to min. required version ${PYTHON_MIN_VERSION}")
message(STATUS "If this is not what you want, please set RUNTIME_PYTHON_EXECUTABLE")
message(STATUS "and RUNTIME_PYTHON_VERSION manually")
set(RUNTIME_PYTHON_EXECUTABLE "/usr/bin/python3")
set(RUNTIME_PYTHON_VERSION ${PYTHON_MIN_VERSION})
set(EXACT_ARGUMENT "")
else(CMAKE_CROSSCOMPILING)
#default to the buildtime interpreter
set(RUNTIME_PYTHON_EXECUTABLE ${PYTHON_EXECUTABLE})
set(RUNTIME_PYTHON_VERSION ${PYTHON_VERSION})
set(EXACT_ARGUMENT "EXACT")
endif(CMAKE_CROSSCOMPILING)
else(NOT RUNTIME_PYTHON_EXECUTABLE)
set(EXACT_ARGUMENT "EXACT")
endif(NOT RUNTIME_PYTHON_EXECUTABLE)
if(NOT RUNTIME_PYTHON_VERSION)
message(STATUS "Manually determining runtime Python version...")
execute_process(COMMAND ${PYTHON_EXECUTABLE} -c "
from __future__ import print_function
import sys
print('{}.{}.{}'.format(
sys.version_info.major,
sys.version_info.minor,
sys.version_info.micro))"
OUTPUT_VARIABLE RUNTIME_PYTHON_VERSION
OUTPUT_STRIP_TRAILING_WHITESPACE)
endif(NOT RUNTIME_PYTHON_VERSION)
#make the path to the executable appear in the cmake gui
set(RUNTIME_PYTHON_EXECUTABLE ${RUNTIME_PYTHON_EXECUTABLE} CACHE FILEPATH
"python runtime interpreter")
message(STATUS "Python runtime interpreter: ${RUNTIME_PYTHON_EXECUTABLE} Version: ${RUNTIME_PYTHON_VERSION}")
message(STATUS "Override with: -DRUNTIME_PYTHON_EXECUTABLE=<path-to-python>")
###############################################################################
# Determine if a Python module is installed, or, more generally, determine
# if some condition that Python can report through a Boolean expression is
# met. This macro allows one or more modules to be imported and a Python
# Boolean expression to be evaluated.
#
# - desc:
# Description of what's being checked (for user feedback)
# - module:
# The module(s) to be passed to the `import` command
# - bool_expr:
# A Python expression to be evaluated that returns True or False based on
# the presence or absence of the module (or in the general case, the
# condition being checked)
# - have_ver:
# The variable name to be set to TRUE if the Python expression returns True,
# or FALSE otherwise
macro(PYTHON_CHECK_MODULE desc module bool_expr have_var)
message(STATUS "")
message(STATUS "Python checking for ${desc}")
execute_process(
COMMAND ${PYTHON_EXECUTABLE} -c "
#########################################
try:
import ${module}
except:
exit(1)
try:
assert ${bool_expr}
except:
exit(2)
exit(0)
#########################################"
RESULT_VARIABLE python_result
)
if(python_result EQUAL 0)
message(STATUS "Python checking for ${desc} - found")
set(${have_var} TRUE)
elseif(python_result EQUAL 1)
message(STATUS "Python checking for ${desc} - \"import ${module}\" failed (is it installed?)")
set(${have_var} FALSE)
elseif(python_result EQUAL 2)
message(STATUS "Python checking for ${desc} - \"assert ${bool_expr}\" failed")
set(${have_var} FALSE)
else()
message(STATUS "Python checking for ${desc} - unknown error")
set(${have_var} FALSE)
endif()
endmacro(PYTHON_CHECK_MODULE)
###############################################################################
# Determine if a Python module is installed and if it meets a minimum required
# version.
#
# - desc:
# Description of what's being checked (for user feedback)
# - module:
# The module to be `import`ed
# - module_version_expr:
# A Python expression to be evaluated that returns the module version string
# (usually "module_name.__version__", but may be tailored for non-conformant
# modules, or other custom use cases)
# - min_module_version:
# The minimum version required of the module as a canonical Python version
# string ("major.minor.micro") as defined in PEP 440
# - have_ver:
# The variable name to be set to TRUE if the module is present and meets
# the minimum version requirement or FALSE otherwise
macro(PYTHON_CHECK_MODULE_VERSION desc module module_version_expr min_module_version have_var)
message(STATUS "")
message(STATUS "Python checking for ${desc}")
execute_process(
COMMAND ${PYTHON_EXECUTABLE} -c "
#########################################
try:
import ${module}
except:
exit(1)
try:
version = ${module_version_expr}
print(version)
except:
exit(2)
exit(0)
#########################################"
RESULT_VARIABLE python_result
OUTPUT_VARIABLE version_output
OUTPUT_STRIP_TRAILING_WHITESPACE
)
if(python_result EQUAL 0)
if(${version_output} VERSION_GREATER_EQUAL ${min_module_version})
message(STATUS "Python checking for ${desc} - ${version_output} satisifes minimum required version ${min_module_version}")
set(${have_var} TRUE)
else()
message(STATUS "Python checking for ${desc} - ${version_output} does not satisfy minimum required version ${min_module_version}")
set(${have_var} FALSE)
endif()
elseif(python_result EQUAL 1)
message(STATUS "Python checking for ${desc} - \"import ${module}\" failed (is it installed?)")
set(${have_var} FALSE)
elseif(python_result EQUAL 2)
message(STATUS "Python checking for ${desc} - evaluation of \"${module_version_expr}\" failed")
set(${have_var} FALSE)
else()
message(STATUS "Python checking for ${desc} - unknown error")
set(${have_var} FALSE)
endif()
endmacro(PYTHON_CHECK_MODULE_VERSION)
###############################################################################
# Part 2: Python Libraries
###############################################################################
# The libraries must match the RUNTIME_PYTHON_EXECUTABLE's version.
# - Figure out version
# - See if Python3_LIBRARIES is already set (or Python2_LIBRARIES)
if(NOT PYTHON_LIBRARIES OR NOT PYTHON_INCLUDE_DIRS)
message(STATUS "Finding Python Libraries...")
find_package(PythonLibs ${RUNTIME_PYTHON_VERSION} ${EXACT_ARGUMENT} QUIET)
if(NOT RUNTIME_PYTHON_VERSION VERSION_LESS 3)
if(NOT PYTHON_LIBRARIES OR NOT PYTHON_INCLUDE_DIRS)
find_package(Python3 ${RUNTIME_PYTHON_VERSION}
${EXACT_ARGUMENT}
QUIET
COMPONENTS Interpreter Development)
if(Python3_Development_FOUND)
set(PYTHON_LIBRARIES ${Python3_LIBRARIES})
set(PYTHON_INCLUDE_DIRS ${Python3_INCLUDE_DIRS})
endif(Python3_Development_FOUND)
endif(NOT PYTHON_LIBRARIES OR NOT PYTHON_INCLUDE_DIRS)
else(NOT RUNTIME_PYTHON_VERSION VERSION_LESS 3)
if(NOT PYTHON_LIBRARIES OR NOT PYTHON_INCLUDE_DIRS)
find_package(Python2 ${RUNTIME_PYTHON_VERSION}
${EXACT_ARGUMENT}
QUIET
COMPONENTS Interpreter Development)
if(Python2_Development_FOUND)
set(PYTHON_LIBRARIES ${Python2_LIBRARIES})
set(PYTHON_INCLUDE_DIRS ${Python2_INCLUDE_DIRS})
endif(Python2_Development_FOUND)
endif(NOT PYTHON_LIBRARIES OR NOT PYTHON_INCLUDE_DIRS)
endif(NOT RUNTIME_PYTHON_VERSION VERSION_LESS 3)
if(NOT PYTHON_LIBRARIES OR NOT PYTHON_INCLUDE_DIRS)
message(STATUS "Could not find Python Libraries.")
endif(NOT PYTHON_LIBRARIES OR NOT PYTHON_INCLUDE_DIRS)
endif(NOT PYTHON_LIBRARIES OR NOT PYTHON_INCLUDE_DIRS)
if(PYTHON_LIBRARIES AND PYTHON_INCLUDE_DIRS)
set(HAVE_PYTHON_LIBS TRUE)
message(STATUS "Python Libraries: ${PYTHON_LIBRARIES}")
message(STATUS "Python include directories: ${PYTHON_INCLUDE_DIRS}")
else(PYTHON_LIBRARIES AND PYTHON_INCLUDE_DIRS)
set(HAVE_PYTHON_LIBS FALSE)
endif(PYTHON_LIBRARIES AND PYTHON_INCLUDE_DIRS)
if(NOT PYTHON_LIBRARY)
set(PYTHON_LIBRARIES ${PYTHON_LIBRARIES} CACHE FILEPATH
"Python libraries")
mark_as_advanced(PYTHON_LIBRARIES)
endif(NOT PYTHON_LIBRARY)
if(NOT PYTHON_INCLUDE_DIR)
set(PYTHON_INCLUDE_DIRS ${PYTHON_INCLUDE_DIRS} CACHE FILEPATH
"Python include dirs")
mark_as_advanced(PYTHON_INCLUDE_DIRS)
endif(NOT PYTHON_INCLUDE_DIR)
endif(NOT DEFINED INCLUDED_UHD_PYTHON_CMAKE)
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