How to build a static library link to a third_part static library using Android ndk - android-ndk

Question

I want to build a static library link to a third_part static library. And then provide the static library which I built to other people to use. But when others use my library, they found an error "undefined reference to 'Func1()'", "Func1()" is a function defined in the third_part static library. Does anyone have an idea how to fix it?
Here's my Android.mk:
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := ThirdLib_Rebuild
LOCAL_SRC_FILES := libThird.a
include $(PREBUILT_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := MyLib
LOCAL_STATIC_LIBRARIES := ThirdLib_Rebuild
LOCAL_SRC_FILES := MyLib.c
include $(BUILD_STATIC_LIBRARY)

Answer 1

ndk-build supports transitive dependencies, i.e. if you define a shared library or executable that depends on your MyLib module, then both libMyLib.a and libThird.a will be linked into it (if not, this is a bug, which NDK are you using exactly?).
However, you're not very clear about what you're doing when distributing your libraries to other people. For the record, you need to distribute both libraries to your users, because libMyLib.a does not include the code from libThird.a, the use of LOCAL_STATIC_LIBRARIES in the MyLib module definition only serves to record a dependency between the two libs, unlike what happens when you use it for a shared library or executable.