error

libjavacore_intermediates/luni/src/main/native/android_system_OsConstants.o: file is empty
target thumb C++: libsurfaceflinger <= frameworks/native/services/surfaceflinger/Client.cpp
target thumb C++: libsurfaceflinger <= frameworks/native/services/surfaceflinger/DisplayDevice.cpp
target thumb C++: libsurfaceflinger <= frameworks/native/services/surfaceflinger/DispSync.cpp
target thumb C++: libsurfaceflinger <= frameworks/native/services/surfaceflinger/EventControlThread.cpp
make[1]: Leaving directory '/home/lovejoy777/android/slimpop/kernel/amazon/otter-common'
target thumb C++: libsurfaceflinger <= frameworks/native/services/surfaceflinger/EventThread.cpp
frameworks/native/services/sensorservice/SensorService.cpp: In member function 'virtual void android::SensorService::onFirstRef()':
frameworks/native/services/sensorservice/SensorService.cpp:162:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for (int i = 0; i < mSensorList.size(); ++i) {
                                                  ^
frameworks/native/services/sensorservice/SensorService.cpp: In member function 'android::status_t android::SensorService::SensorEventConnection::sendEvents(const sensors_event_t*, size_t, sensors_event_t*, const android::SensorService::SensorEventConnection* const*)':
frameworks/native/services/sensorservice/SensorService.cpp:1245:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if (mCacheSize + count <= mMaxCacheSize) {
                                   ^
frameworks/native/services/sensorservice/SensorService.cpp:1251:64: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             if (mCacheSize + count < computeMaxCacheSizeLocked()) {
                                                                ^
target thumb C++: libsurfaceflinger <= frameworks/native/services/surfaceflinger/FrameTracker.cpp
libcore/luni/src/main/native/Register.cpp:36: error: undefined reference to 'register_android_system_OsConstants(_JNIEnv*)'
clang: error: linker command failed with exit code 1 (use -v to see invocation)
build/core/host_shared_library_internal.mk:44: recipe for target '/home/lovejoy777/android/slimpop/out/host/linux-x86/obj32/lib/libjavacore.so' failed
make: *** [/home/lovejoy777/android/slimpop/out/host/linux-x86/obj32/lib/libjavacore.so] Error 1
make: *** Waiting for unfinished jobs....
In file included from frameworks/native/services/surfaceflinger/EventControlThread.cpp:18:
In file included from frameworks/native/services/surfaceflinger/SurfaceFlinger.h:57:
frameworks/native/services/surfaceflinger/DisplayHardware/HWComposer.h:219:16: warning: struct 'HWComposer' was previously declared as a class [-Wmismatched-tags]
        friend struct HWComposer;
               ^
frameworks/native/services/surfaceflinger/DisplayHardware/HWComposer.h:58:7: note: previous use is here
class HWComposer
      ^
1 warning generated.
In file included from frameworks/native/services/surfaceflinger/EventThread.cpp:33:
In file included from frameworks/native/services/surfaceflinger/SurfaceFlinger.h:57:
frameworks/native/services/surfaceflinger/DisplayHardware/HWComposer.h:219:16: warning: struct 'HWComposer' was previously declared as a class [-Wmismatched-tags]
        friend struct HWComposer;
               ^
frameworks/native/services/surfaceflinger/DisplayHardware/HWComposer.h:58:7: note: previous use is here
class HWComposer
      ^
1 warning generated.
In file included from frameworks/native/services/surfaceflinger/DisplayDevice.cpp:35:
frameworks/native/services/surfaceflinger/DisplayHardware/HWComposer.h:219:16: warning: struct 'HWComposer' was previously declared as a class [-Wmismatched-tags]
        friend struct HWComposer;
               ^
frameworks/native/services/surfaceflinger/DisplayHardware/HWComposer.h:58:7: note: previous use is here
class HWComposer
      ^
In file included from frameworks/native/services/surfaceflinger/DisplayDevice.cpp:39:
frameworks/native/services/surfaceflinger/DisplayDevice.h:40:1: warning: class 'DisplayInfo' was previously declared as a struct [-Wmismatched-tags]
class DisplayInfo;
^
frameworks/native/include/ui/DisplayInfo.h:28:8: note: previous use is here
struct DisplayInfo {
       ^
frameworks/native/services/surfaceflinger/DisplayDevice.h:40:1: note: did you mean struct here?
class DisplayInfo;
^~~~~
struct
2 warnings generated.
In file included from frameworks/native/services/surfaceflinger/Client.cpp:26:
In file included from frameworks/native/services/surfaceflinger/Layer.h:42:
In file included from frameworks/native/services/surfaceflinger/SurfaceFlinger.h:57:
frameworks/native/services/surfaceflinger/DisplayHardware/HWComposer.h:219:16: warning: struct 'HWComposer' was previously declared as a class [-Wmismatched-tags]
        friend struct HWComposer;
               ^
frameworks/native/services/surfaceflinger/DisplayHardware/HWComposer.h:58:7: note: previous use is here
class HWComposer
      ^
1 warning generated.
lovejoy777@alien:~/androi