如何用CMake优雅导入含多DLL的预构建共享库？

你当前的写法因重复创建导入目标、重复设置相同属性导致代码冗余，可通过CMake的循环语法大幅简化实现逻辑，同时保持功能一致。

优化实现代码 #

# 定义需要导入的DLL名称列表，新增/删除DLL仅需修改此处
set(FOO_DLLS foo1 foo2 foo3 foo4)

# 统一管理公共路径，后续调整目录结构只需修改一次
set(FOO_INCLUDE_DIR "${PROJECT_SOURCE_DIR}/include")
set(FOO_IMPLIB_PATH "${PROJECT_SOURCE_DIR}/lib/foo.lib")
set(FOO_BIN_DIR "${PROJECT_SOURCE_DIR}/bin")

# 批量创建DLL导入目标并收集目标列表
set(FOO_IMPORTED_TARGETS "")
foreach(dll_name IN LISTS FOO_DLLS)
    # 创建命名空间下的导入库目标
    add_library(foo::${dll_name} SHARED IMPORTED)
    
    # 设置接口包含目录（现代CMake推荐写法）
    target_include_directories(foo::${dll_name} INTERFACE "${FOO_INCLUDE_DIR}")
    
    # 设置导入库和DLL路径属性
    set_target_properties(foo::${dll_name} PROPERTIES
        IMPORTED_IMPLIB "${FOO_IMPLIB_PATH}"
        IMPORTED_LOCATION "${FOO_BIN_DIR}/${dll_name}.dll"
    )
    
    # 将目标添加到统一列表，用于后续创建聚合接口
    list(APPEND FOO_IMPORTED_TARGETS foo::${dll_name})
endforeach()

# 创建统一的INTERFACE目标，方便其他项目目标一键链接
add_library(foo::foo INTERFACE IMPORTED GLOBAL)
target_link_libraries(foo::foo INTERFACE ${FOO_IMPORTED_TARGETS})

方案优势 #

• 代码精简：通过循环批量处理所有DLL，消除重复的目标创建和属性设置代码
• 易维护性：新增或移除DLL时，仅需修改FOO_DLLS列表，无需改动大量重复逻辑
• 模块化管理：公共路径集中定义，后续调整目录结构只需修改一处变量
• 规范兼容：使用target_include_directories、target_link_libraries等现代CMake命令，代码可读性和兼容性更好

扩展：支持多构建类型（Debug/Release） #

如果预构建库区分了Debug和Release版本，可通过带配置后缀的属性适配：

set(FOO_DLLS foo1 foo2 foo3 foo4)
set(FOO_INCLUDE_DIR "${PROJECT_SOURCE_DIR}/include")
set(FOO_BIN_DIR "${PROJECT_SOURCE_DIR}/bin")

set(FOO_IMPORTED_TARGETS "")
foreach(dll_name IN LISTS FOO_DLLS)
    add_library(foo::${dll_name} SHARED IMPORTED)
    target_include_directories(foo::${dll_name} INTERFACE "${FOO_INCLUDE_DIR}")
    
    set_target_properties(foo::${dll_name} PROPERTIES
        IMPORTED_IMPLIB_DEBUG "${PROJECT_SOURCE_DIR}/lib/Debug/foo.lib"
        IMPORTED_IMPLIB_RELEASE "${PROJECT_SOURCE_DIR}/lib/Release/foo.lib"
        IMPORTED_LOCATION_DEBUG "${FOO_BIN_DIR}/Debug/${dll_name}.dll"
        IMPORTED_LOCATION_RELEASE "${FOO_BIN_DIR}/Release/${dll_name}.dll"
    )
    
    list(APPEND FOO_IMPORTED_TARGETS foo::${dll_name})
endforeach()

add_library(foo::foo INTERFACE IMPORTED GLOBAL)
target_link_libraries(foo::foo INTERFACE ${FOO_IMPORTED_TARGETS})

内容的提问来源于stack exchange，提问作者EV0R