Prevent manually added libraries from being deleted by ndk-build

Issue

I have a project which is reusing a native library (libocr.so) pre-compiled and for which I don't have source files. I manually put the library on libs/armeabi of my project and everything works perfectly.

Then I needed to create a new native library to the same project. I put my source code as weel as the Android.mk file in my jni folder and I build it with ndk-buld command. The library is build and placed in libs/armeabi folder, but libocr.so (the one manually added) is automatically deleted from there... How can I prevent libocr.so from being deleted?

Here is my Android.mk file:

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE    := libyuv
LOCAL_SRC_FILES := ycrcbutils.c

include $(BUILD_SHARED_LIBRARY)

Thanks in advance for any help, Luca.

Solution

...ok I found the answer by myself... according to ndk/docs/PREBUILTS.HTML I changed my Android.mk like this:

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_LDLIBS := -llog

LOCAL_MODULE    := libyuv
LOCAL_SRC_FILES := ycrcbutils.c

include $(BUILD_SHARED_LIBRARY)


# Add prebuilt libocr
include $(CLEAR_VARS)

LOCAL_MODULE := libocr
LOCAL_SRC_FILES := libocr.so

include $(PREBUILT_SHARED_LIBRARY)

and placed a copy of my libocr.so under jni folder of my project.

Answered By - lviggiani