cmake 调用 python

# set minimum cmake version
cmake_minimum_required(VERSION 3.5 FATAL_ERROR)

# project name and language
project(recipe-01 LANGUAGES NONE)

# detect python
find_package(PythonInterp REQUIRED)

# Execute a tiny Python script
execute_process(
  COMMAND
    ${PYTHON_EXECUTABLE} "-c" "print('Hello, world!')"
  RESULT_VARIABLE _status
  OUTPUT_VARIABLE _hello_world
  ERROR_QUIET
  OUTPUT_STRIP_TRAILING_WHITESPACE
  )

message(STATUS "RESULT_VARIABLE is: ${_status}")
message(STATUS "OUTPUT_VARIABLE is: ${_hello_world}")

# compare the "manual" messages with the following handy helper
include(CMakePrintHelpers)
cmake_print_variables(_status _hello_world)

-- Found PythonInterp: /home/ledi/anaconda3/bin/python (found version "3.8.3") 
-- RESULT_VARIABLE is: 0
-- OUTPUT_VARIABLE is: Hello, world!
-- _status="0" ; _hello_world="Hello, world!"
-- Configuring done
-- Generating done
-- Build files have been written to: /home/ledi/图片/３/makfile_learn/CMake简明教程/c30_python/build