参考:官方cmake指令说明:https://cmake.org/cmake/help/latest/manual/cmake-commands.7.html
#所需cmake最低版本
cmake_minimum_required(VERSION 3.13)
#工程名
project(cmake_testapp)
#设置C++标准
set(CMAKE_CXX_STANDARD 14)
#生成可执行文件
add_executable(cmake_testapp main.cpp)
add_executable(cmake_testapp_calc main.cpp calc.cpp)
#编译库文件
add_library (test_library STATIC calc.cpp)
#编译子工程,子工程下必须有相应的cmakelist.txt文件
add_subdirectory(test)
#添加IN