Question

I’m having a similar problem to what this person was having:

Android NDK import-module / code reuse

But for some reason when I implement the solution that they listed, it doesn’t work for me. The only difference I have in my project is that I am using 1 makefile for the entire project. So, the modules look like this: (… = more files or paths)

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE := mod1
LOCAL_C_INCLUDES := $(LOCAL_PATH)/to/c/includes \
... \
LOCAL_SRC_FILES := stringTester.cpp \
... \
include$(BUILD_STATIC_LIBRARY)


include $(CLEAR_VARS)

LOCAL_MODULE := mod2
LOCAL_C_INCLUDES := $(LOCAL_PATH)/to/c/includes \
... \
LOCAL_SRC_FILES := localSourceFile.cpp \
... \
include$(BUILD_STATIC_LIBRARY)

and so on for 2 more modules, then in the final module:

include $(CLEAR_VARS)

LOCAL_MODULE := sharedMod
LOCAL_C_INCLUDES := $(LOCAL_PATH)/to/c/includes \
... \
LOCAL_STATIC_LIBRARIES := mod1 mod2 mod3 mod4
... \
include $(BUILD_SHARED_LIBRARY)

and in my java file:

package com.string.test

public class javaTest{

public native String returnAString();

static{
    System.LoadLibrary("sharedMod");
  }
}

The problem I’m running into is that I cannot call any methods from the static libraries, such as any method in stringTester.cpp, but if I move that file to be included in the module that creates the shared library, everything works as it should, the Java wrappers are correct and methods return the data I expect. The only reason why I don’t move all the files into a shared library are they are separate and evolving projects, such as our physics engine and so forth.

I have also tried separating the modules with each module having its own makefile, and also having a cpp file in the shared library that called the methods in the static libraries but I would get a lot of unresolved reference failures. One other solution I have tried was to use LOCAL_WHOLE_STATIC_LIBRARIES to load the static libraries but that gave me unresolved reference errors as well.

Any help or suggestions are appreciated. I’m at my wits end, and at a roadblock.

Answer 1

The answer is definitely to use:

LOCAL_WHOLE_STATIC_LIBRARIES := mod1 mod2 mod3 mod4

I was running into other problems with including other libraries but when reduced to a simple test case, using the above macro worked. Thanks to nos for the help!!