Android NDK: load_library: cannot locate srand

Question

I have an android project where I use native code to do stuff with SIP (using libosip2 and libeXosip2). My native code is compiled together with the libraries' sources into one module.

The code compiles just fine and the generated library has all the symbols I expect it to have, but when I try to load the generated library I get the following error:

E/eXosip.loadLibrary(9210): java.lang.UnsatisfiedLinkError: Cannot load library: reloc_library[1307]:  1941 cannot locate 'srand'...

My Application.mk looks like this:

APP_STL         := gnustl_shared
APP_ABI         := armeabi-v7a
APP_CPPFLAGS    += -fexceptions

I did check for uncaught dependencies using ndk-depends, which gives me

libeXosip_jni.so
libstdc++.so
liblog.so
libgnustl_shared.so
libm.so
libdl.so
libc.so

Adding a loadLibrary("gnustl_shared") does not help (which is the only one of the mentioned libraries also found in "libs/armeabi-v7/").

My Android.mk:

LOCAL_PATH  := $(call my-dir)
$(shell (cd $(LOCAL_PATH); sh extract_stuff.sh; cd $(OLDPWD)))


include $(CLEAR_VARS)
OSIP        := libosip2-4.1.0
EXOSIP      := libeXosip2-4.1.0
LOCAL_MODULE    := eXosip

LOCAL_C_INCLUDES    := $(LOCAL_PATH)/$(OSIP)/include \
                       $(LOCAL_PATH)/$(EXOSIP)/include

LOCAL_SRC_FILES := $(patsubst $(LOCAL_PATH)/%, %, $(wildcard $(LOCAL_PATH)/$(OSIP)/src/osipparser2/*.c)) \
                   $(patsubst $(LOCAL_PATH)/%, %, $(wildcard $(LOCAL_PATH)/$(OSIP)/src/osip2/*.c)) \
                   $(patsubst $(LOCAL_PATH)/%, %, $(wildcard $(LOCAL_PATH)/$(EXOSIP)/src/*.c))

LOCAL_CFLAGS += -DHAVE_FCNTL_H \
                -DHAVE_SYS_TIME_H \
                -DHAVE_STRUCT_TIMEVAL \
                -DHAVE_SYS_SELECT_H \
                -DHAVE_PTHREAD \
                -DHAVE_SEMAPHORE_H \
                -DENABLE_TRACE \
                -DOSIP_MT

include $(BUILD_STATIC_LIBRARY)


include $(CLEAR_VARS)
LOCAL_MODULE    := eXosip_jni
LOCAL_STATIC_LIBRARIES  := eXosip
LOCAL_LDLIBS := -llog 

LOCAL_C_INCLUDES := BackendData.h \
                    $(LOCAL_PATH)/$(EXOSIP)/include \
                    $(LOCAL_PATH)/$(OSIP)/include

LOCAL_SRC_FILES := eXosip.cpp \
                   eXosipCall.cpp

include $(BUILD_SHARED_LIBRARY)

C/C++ is not my fortitude, so if someone could enlighten me I'd be really grateful :) As an alternative, a solution to my problem would also be nice ^^

---

Update 1

I separated the eXosip/osip library from my code, compiling it into a static library. I also tested creating a shared library and loading it by hand from inside Java, it fails with the same error message.

Update 2

I tried using gnustl_shared, static and also stlport - the error remains.

Answer 1

For those stumbling onto this thread while having trouble with srand/atof on NDK r10c: Make sure you set your android target to 19. Your app should then work on Android 5 (21) as well as all lower versions.

If you set your android target to 21, then your app will ONLY run on Android 5. Your app will however no longer work on all lower android versions, because a lot of stdlib functions cannot be found (like srand/atof).

Kind regards, Michaël