How to build an shared library and call it in other ndk program

Question

I want to build an shared library. To build it, I need to call another shared library. Here is what I did:

1.Create one Android project,named \"BuildLib\",and add a

Answer 1

In your second Android.mk, try replacing the first module with:

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_SRC_FILES := libadd.so
LOCAL_MODULE := add_prebuilt
LOCAL_EXPORT_C_INCLUDES := add.h
include $(PREBUILD_SHARED_LIBRARY)

The LOCAL_EXPORT_C_INCLUDES flag should attach the header information to the add_prebuilt module, so it can be linked with your final library.

Answer 2

Just in case anyone needs it:

A bit hackish way to keep the linker happy:

LOCAL_LDLIBS := -llog

or

LOCAL_LDLIBS := -L$(LOCAL_PATH)/lib -lMyStuff

Less hackish:

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)
LOCAL_MODULE := xyz
LOCAL_SRC_FILES += xyz/xyz.c
LOCAL_LDLIBS := -llog
include $(BUILD_SHARED_LIBRARY)    # this builds libxyz.so


include $(CLEAR_VARS)
LOCAL_MODULE    := abc
LOCAL_SHARED_LIBRARIES := xyz    # <=== !!! this makes libabc.so dependent on libxyz.so
LOCAL_SRC_FILES := abc/abc.c
#LOCAL_LDLIBS := ...
include $(BUILD_SHARED_LIBRARY)    # this builds libabc.so