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Editorial Team
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Asked: 2026-05-31T14:36:51+00:00

I have a program I am porting that links together multiple libraries when creating

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I have a program I am porting that links together multiple libraries when creating the executable. I have built all those libraries using the stand alone toolchain and using the standalone toolchain I am able to create an executable that works on an android device. So, it seems like the libraries I have built are functional. Now I am trying to incorporate those libraries with an app. So, in my android.mk I have something like this:

LOCAL_PATH := $(call my-dir)
ROOT_PATH := $(LOCAL_PATH)

include $(call all-subdir-makefiles)
include $(CLEAR_VARS)

LOCAL_PATH = $(ROOT_PATH)

LOCAL_MODULE    := test-libs

LOCAL_STATIC_LIBRARIES := staticA
LOCAL_SHARED_LIBRARIES := sharedA sharedB sharedC sharedD
LOCAL_SRC_FILES := test-libs.c

include $(BUILD_SHARED_LIBRARY)

For each of the libraries, I have a Android.mk like this

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE := sharedA

LOCAL_SRC_FILES := sharedA.so

include $(PREBUILT_SHARED_LIBRARY)

When I then build my project (in eclipse), I get this:

C:/ndk/android-ndk-r7b/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.4.3/libgcc.a(unwind-arm.o): In function `__gnu_unwind_pr_common':
/cygdrive/c/ndk/android-ndk-r7b/build/core/build-binary.mk:314: recipe for target `obj/local/armeabi/libtest-libs.so' failed
/tmp/ndk-digit/src/build/../gcc/gcc-4.4.3/libgcc/../gcc/config/arm/unwind-arm.c:1237: undefined reference to `__cxa_call_unexpected'

Any thoughts on what is going wrong?

Also, the static library and one of the shared libraries have no dependencies on anything and if I only include them all is cool. One of my shared libraries only had a dependency on the static library. If I only include those, but when I include the others, which have dependencies on other shared libraries, this problem occurs.

Update 1: Ok it appears to be because the APP_STL setting in my Application.mk was being ignored. All I have in my Application.mk is:
APP_STL := gnustl_shared
If I copy over the libgnustl_shared.so and treat it like another prebuilt shared lib, my problem is gone. Any idea why the APP_STL is not working properly. Note, I could have screwed something up. I just upgraded to using 7b. Using gnustl_shared used to work for me with other apps. Rolling back to 7 doesn’t fix it. I think I have messed something up in Eclipse. I use Eclipse (windows) with sequoyah.

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1 Answer

  1. Editorial Team

    It looks like the linker is giving you an error. What you should do is the following:

    Add a LOCAL_LDLIBS under your LOCAL_MODULE := test-libs. Here you need to include all the libraries you link against when you compile your pre-compiled libraries. So for example:

    LOCAL_LDLIBS := -lgnustl_shared -lgcc -llog -landroid -lstdc++

    Basically you need to identify what library contains the function __cxa_call_unexpected. A quick google shows that it’s probably in libstdc++. Make sure that you also link with this library when creating your pre-compiled libraries.

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