Linking target libraries from different tree branch

[AkshayFP]

I am trying to build a Qt for Android application and I have a root project that looks like this:

root
|
|- CMakeList.txt
|- Project_A <- shared object
|  `- CMakeList.txt
`- Project_B <- actual app
   `- CMakeList.txt

Now, Project_B depends on Project_A. Project_A builds the a shared object - libProject_A_x86_64.so.

In Project_B, I have the following configurations:

...
target_include_directories(cook-ui-modular-qt PUBLIC
    ../Project_A
)

if(ANDROID)
    set(ANDROID_PACKAGE_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/android" CACHE INTERNAL "")
    set(LIBS ${CMAKE_BINARY_DIR}/Project_A/libProject_A_${ANDROID_ABI}.so)

    target_link_libraries(root PUBLIC ${LIBS})
    set(ANDROID_EXTRA_LIBS ${LIBS} CACHE INTERNAL "")
endif()
...

Even though have these linked, I still get the following error:

E AndroidRuntime: FATAL EXCEPTION: qtMainLoopThread
E AndroidRuntime: Process: org.qtproject.example.cook_ui_modular_qt, PID: 3484
E AndroidRuntime: java.lang.UnsatisfiedLinkError: dlopen failed: library "libProject_A_x86_64.so" not found: needed by /data/app/~~z1ZkaaXPy7l45CcQdoiWxA==/org.qtproject.example.cook_ui_modular_qt-piF9pyelBLjV1RLkvk0wIA==/lib/x86_64/libcook-ui-modular-qt_x86_64.so in namespace classloader-namespace
E AndroidRuntime: 	at java.lang.Runtime.load0(Runtime.java:939)
E AndroidRuntime: 	at java.lang.System.load(System.java:1628)
E AndroidRuntime: 	at org.qtproject.qt.android.QtNative$4.run(QtNative.java:516)
E AndroidRuntime: 	at org.qtproject.qt.android.QtThread$2.run(QtThread.java:87)
E AndroidRuntime: 	at org.qtproject.qt.android.QtThread$1.run(QtThread.java:61)
E AndroidRuntime: 	at java.lang.Thread.run(Thread.java:923)

This basically means that the libProject_A_x86_64.so is not found. I am not sure how to make this file available to the apk. Any help on this would be appreciated.

[AkshayFP]

A hack that I had to do for this to work is to manually copy the so file.

if(ANDROID)
    add_custom_command(TARGET cook-ui-modular-qt POST_BUILD
        COMMAND ${CMAKE_COMMAND} -E copy
        ${CMAKE_BINARY_DIR}/App/ConnectedSocket/libConnectedSocket_${ANDROID_ABI}.so
        ${CMAKE_BINARY_DIR}/App/UserInterface/android-build/libs/${ANDROID_ABI}/libConnectedSocket_${ANDROID_ABI}.so
        )
endif()

This is obviously not the right way to do it. But I don't know how to do it the right way