process

使用execute_process 下载依赖包，配置环境等，各种操作。

参数必须要传，不用也要传空

set(getdep1 ${CMAKE_SOURCE_DIR}/clone.sh)

execute_process(
    COMMAND ${getdep1} ""
    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/dep
    RESULT_VARIABLE result
    OUTPUT_VARIABLE output
)

if(result EQUAL 0)
    message(STATUS "task done")
else()
    message(FATAL_ERROR "task Error! " "return code: " ${result})
endif()

set(MAKE_CMD "${CMAKE_CURRENT_SOURCE_DIR}/makeHeaders.sh")
MESSAGE("COMMAND: ${MAKE_CMD} ${CMAKE_CURRENT_SOURCE_DIR} ${INC_DIR}")
execute_process(COMMAND ${MAKE_CMD} ${CMAKE_CURRENT_SOURCE_DIR} ${INC_DIR}
   RESULT_VARIABLE CMD_ERROR
      OUTPUT_FILE CMD_OUTPUT)
  MESSAGE( STATUS "CMD_ERROR:" ${CMD_ERROR})
  MESSAGE( STATUS "CMD_OUTPUT:" ${CMD_OUTPUT})

https://stackoverflow.com/questions/43684051/cmake-execute-process-command