C++ 从其他对象库创建CMake对象库（类似于使用ld重新定位输出）

我有以下代码结构

Project->
    project.cxx
    CMakeLists.txt
    meta->
        CMakeLists.txt   
        first->
           first.cxx
           CMakeLists.txt
        second->
           second.cxx
           CMakeLists.txt

其中first/CMakeLists.txt包含：

FILE(GLOB first_sources "*.cxx")
ADD_LIBRARY(first OBJECT ${first_sources})

FILE(GLOB second_sources "*.cxx")
ADD_LIBRARY(second OBJECT ${second_sources})

ADD_SUBDIRECTORY(first)
ADD_SUBDIRECTORY(second)
ADD_LIBRARY(meta OBJECT $<TARGET_OBJECTS:first> $<TARGET_OBJECTS:second>)

第二个/CMakeLists.txt包含：

FILE(GLOB first_sources "*.cxx")
ADD_LIBRARY(first OBJECT ${first_sources})

FILE(GLOB second_sources "*.cxx")
ADD_LIBRARY(second OBJECT ${second_sources})

ADD_SUBDIRECTORY(first)
ADD_SUBDIRECTORY(second)
ADD_LIBRARY(meta OBJECT $<TARGET_OBJECTS:first> $<TARGET_OBJECTS:second>)

meta/CMakeLists.txt包含：

FILE(GLOB first_sources "*.cxx")
ADD_LIBRARY(first OBJECT ${first_sources})

FILE(GLOB second_sources "*.cxx")
ADD_LIBRARY(second OBJECT ${second_sources})

ADD_SUBDIRECTORY(first)
ADD_SUBDIRECTORY(second)
ADD_LIBRARY(meta OBJECT $<TARGET_OBJECTS:first> $<TARGET_OBJECTS:second>)

同样的，CMake的替代方案是什么