Link to home
Start Free TrialLog in
Avatar of jz4349
jz4349

asked on

jni and static libraries

I'm writing a Java application that calls some functions in a static
library on Solaris 2.4.  A shared library libMyShared.so is created to
call functions in the static library libMyStatic.a: CC -G test.c -o
libMyShared.so -lMyStatic where test.c implements the native calls. When
I run the Java application, I get the following error: ld.so.1:
/usr/local/jdk1.1.1/bin../bin/sparc/green_threads/java: fatal: relocation
error: symbol not found: __0oNIostream_initctv: referenced in
 ./libMyShared.so killed

Does anyone know what is happening?
Thanks in advance for any advice/suggestions.

Jun
jz4349@sbc.com
Avatar of jpk041897
jpk041897

Sounds like your getting a conflict between static and shared instances of a function.

When you compile a library, you will be using either static or shared instances of the standard UNIX libs. When you attempt to link them both together in a single app. Your linker will most likley get totaly confused.

For this kind of mix, I would suggest you use CORBA or RPC's to establish the communication with functions that will make the calls to the static library, thus avoiding the presence of duplicated static/dynamic symbols.





ASKER CERTIFIED SOLUTION
Avatar of fakir
fakir

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Avatar of jz4349

ASKER

The expert may be right, but no specific solution is suggested.
Adding "/usr/lib/libC.so.5" to the compile line solved the problem
(Thanks to qtxchho@aom.ericsson.se )
Hi,

I am writing a java program which uses JNI to call old c++ libraries, and got error message:

ld.so.1:jdk/bin/sparc/native_threads/java:fatal relocation error:file /home/myhome/lib/libtest.so: symbol __xxxxx: referenced symbol not found

libtest.so is the shared library called indirectly by the java program. __xxxxx is the symbol of the function which is called in libtest.so and is defined in another library libcalledtest.so.

Both libraries libtest.so and lbcalledtest.so are in the same directory which is in LD_LIBRARY_PATH.

I am using SunOS 5.5.1, java 1.2.2 and SC++ 4.2. Please send response to preetia@ggn.hcltech.com.

thanks
  preeti