38 lines
1.5 KiB
CMake
38 lines
1.5 KiB
CMake
# SPDX-License-Identifier: Apache-2.0
|
|
|
|
# On Windows, instruct Python to output UTF-8 even when not
|
|
# interacting with a terminal. This is required since Python scripts
|
|
# are invoked by CMake code and, on Windows, standard I/O encoding defaults
|
|
# to the current code page if not connected to a terminal, which is often
|
|
# not what we want.
|
|
if (WIN32)
|
|
set(ENV{PYTHONIOENCODING} "utf-8")
|
|
endif()
|
|
|
|
set(PYTHON_MINIMUM_REQUIRED 3.6)
|
|
|
|
# We are using foreach here, instead of find_program(PYTHON_EXECUTABLE_SYSTEM_DEFAULT "python" "python3")
|
|
# cause just using find_program directly could result in a python2.7 as python, and not finding a valid python3.
|
|
foreach(PYTHON_PREFER ${PYTHON_PREFER} "python" "python3")
|
|
find_program(PYTHON_PREFER_EXECUTABLE ${PYTHON_PREFER})
|
|
if(PYTHON_PREFER_EXECUTABLE)
|
|
execute_process (COMMAND "${PYTHON_PREFER_EXECUTABLE}" -c
|
|
"import sys; sys.stdout.write('.'.join([str(x) for x in sys.version_info[:2]]))"
|
|
RESULT_VARIABLE result
|
|
OUTPUT_VARIABLE version
|
|
ERROR_QUIET
|
|
OUTPUT_STRIP_TRAILING_WHITESPACE)
|
|
|
|
if(version VERSION_LESS PYTHON_MINIMUM_REQUIRED)
|
|
set_property (CACHE PYTHON_PREFER_EXECUTABLE PROPERTY VALUE "PYTHON_PREFER_EXECUTABLE-NOTFOUND")
|
|
else()
|
|
set(PYTHON_MINIMUM_REQUIRED ${version})
|
|
set(PYTHON_EXACT EXACT)
|
|
break()
|
|
endif()
|
|
endif()
|
|
endforeach()
|
|
|
|
find_package(Python3 ${PYTHON_MINIMUM_REQUIRED} REQUIRED ${PYTHON_EXACT})
|
|
set(PYTHON_EXECUTABLE ${Python3_EXECUTABLE})
|