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这是我的项目树状格式： 

├── cmake       
│  └── CopyHeaderFiles.cmake    
├── CMakeLists.txt   
├── common   
│   ├── CMakeLists.txt   
│   ├── Headers   
│   │   ├── CMakeLists.txt       
│   │   ├── criticalmessage.h        
│   └── Src    
│       ├── CMakeLists.txt   
│       ├── criticalmessage.cpp     
├── includes    
│   └── CMakeLists.txt    
├── main.cpp

如您所见，我的项目中有一个模块（通用），我的目标是使用 add_custom_command 将所有头文件从 PROJECT_SOURCE_DIR/common/Headers 复制到 PROJECT_BINARY_DIR/includes。
这是常见的/CMakeLists.txt

    cmake_minimum_required (VERSION 3.0)
    set(MODULE_NAME common)
    add_subdirectory(Headers)
    add_subdirectory(Src)
    include(${PROJECT_SOURCE_DIR}/cmake/CopyHeaderFiles.cmake) 
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -lpthread")
    include_directories("${CMAKE_SOURCE_DIR}/common/Headers" )
    add_library(${MODULE_NAME} STATIC ${SRC_LIST} ${INCLUDE_LIST})
    set(LIBRARY_OUTPUT_PATH ${PROJECT_BINARY_DIR}/lib)

And content of cmake/HeaderFiles.cmake:

foreach( headerfile ${INCLUDE_LIST})

    add_custom_command(
        OUTPUT ${headerfile}
        COMMAND ${CMAKE_COMMAND} -E copy    
        "${PROJECT_SOURCE_DIR}/${MODULE_NAME}/Headers/${headerfile}"        
        "${PROJECT_BINARY_DIR}/includes"    
         )

endforeach( headerfile )

但是包含目录中不存在任何文件，并且在构建我的项目后始终为空。
我哪里错了？

4

0 回答 0