Re: unsatisfied linkerror when loading a shared library

[RichardC]

You need to load them in order with the most dependent library first.

So if libA.so uses libB.so call:

  System.loadlibrary(B)

  System.loadlibrary(A)

There is no automatic cascade load of dependent libs.

On Sunday, July 15, 2012 8:59:02 AM UTC+1, abhiram chitangal wrote:

Hello,

I am trying to use my own build of openssl with my application. Right now I have two shared libraries in my
PROJECT/libs folder.
a) libfipswrapper.so
b) libcrypto.so

I try loading these two through the System.loadlibrary call in my java code and it fails saying that

Caused by: java.lang.UnsatisfiedLinkError: Cannot load library: link_image[1969]:   130 could not load needed library 'libcrypto.so.1.0.0' for 'libmywrapper.so' (load_library[1111]: Library 'libcrypto.so.1.0.0' not found)

I had to rename the libcrypto.so.1.0.0 that came with my openssl build to libcrypto.so , as it wouldn't take the file names that didn't end with .so.
Any Ideas ?
thanks

[eric liou]

Digging into the implementation of System.loadlibrary, you'll find
that the native library name format is defined by the macro
'OS_SHARED_LIB_FORMAT_STR'.
It is defined in an arch dependent file AndroidConfig.h
For arm, you can find following line in
system/core/include/arch/linux-arm/AndroidConfig.h

#define OS_SHARED_LIB_FORMAT_STR "lib%s.so"

On Sun, Jul 15, 2012 at 3:59 PM, abhiram chitangal
<abhiram.c...@gmail.com> wrote:
>
> Hello,
>
> I am trying to use my own build of openssl with my application. Right now I have two shared libraries in my
> PROJECT/libs folder.
> a) libfipswrapper.so
> b) libcrypto.so
>
> I try loading these two through the System.loadlibrary call in my java code and it fails saying that
>
> Caused by: java.lang.UnsatisfiedLinkError: Cannot load library: link_image[1969]: 130 could not load needed library 'libcrypto.so.1.0.0' for 'libmywrapper.so' (load_library[1111]: Library 'libcrypto.so.1.0.0' not found)
>
> I had to rename the libcrypto.so.1.0.0 that came with my openssl build to libcrypto.so , as it wouldn't take the file names that didn't end with .so.
> Any Ideas ?
> thanks
>

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[Amit Agrawal]

abhiram,

Were you able to resolve situation. How you dealt with version library since android doesn't allow versioned lib.

Regards.

On Sunday, 15 July 2012 22:20:27 UTC+5:30, abhiram wrote:

Thanks Richard I already tried loading the two shared libraries through the System. call. In my situation it seems that it cannot find the specific library libcrypto.so.1.0.0. Which I build as a PREBUILT share library "libcryto.so" as NDK-BUILD wouldn't accept the filename as a valid one if it din't end with .so.

Here the two of my Android.mk files.

This is the main Android.mk

JNI_DIR := $(call my-dir)
LOCAL_PATH:= $(JNI_DIR)
include $(CLEAR_VARS)
# build the libfips
include lib/Android.mk

# Now Build the shared library
LOCAL_PATH:=$(JNI_DIR)
include $(CLEAR_VARS)
LOCAL_MODULE:=mywrapper
LOCAL_SRC_FILES := nativeCode.c
LOCAL_SHARED_LIBRARIES:=fips
LOCAL_C_INCLUDES:=$(JNI_DIR)/../../../fips/openssl-fips-2.0.1/include \
          $(JNI_DIR)/../../../fips/openssl-1.0.1c/include         
LOCAL_LDLIBS:=-llog
include $(BUILD_SHARED_LIBRARY)

Android.mk for libcrypto.

# Makes Shared Library "libcrypto.so"
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE:=fips
LOCAL_SRC_FILES:=libcrypto.so
MY_INC := /home/abhiram/fips/openssl-1.0.1c/include/
LOCAL_EXPORT_C_INCLUDES:=$(MY_INC)
include $(PREBUILT_SHARED_LIBRARY)

I hope this gives out a better idea of what I am trying to do.

Thanks