Loading native library fails within a Java program

[Chamitha]

I have written a simple Java file that simply loads a native library file using System.loadLibrary(). The native library file name is libACE.sl. MY java file is as follows:

import java.lang.Throwable;

class LoadNative {
public static void main(String args[])
{
String libname = "ACE";

try
{
System.loadLibrary(libname);
System.out.println("Library " +
libname + " successfully loaded");
}
catch (UnsatisfiedLinkError Err)
{
//System.out.println("error: " + Err);
Err.printStackTrace();
//return;
}
System.out.println("All done");
}
}

I have set my SHLIB_PATH to include the directory that contains libACE.sl. The Java program compiles sucessfully, however when run (using java LoadNative) it throws the following exception:

aCC runtime: Error 215 from shl_findsym(./libACE.sl,_shlInit)
/usr/lib/dld.sl: Unresolved symbol: openprot__7filebuf (data) from ./libACE.sl
/usr/lib/dld.sl: Unresolved symbol: cerr (data) from ./libACE.sl
/usr/lib/dld.sl: Unresolved symbol: typeid__XT9streambuf_ (data) from ./libACE.sl
/usr/lib/dld.sl: Unresolved symbol: xsputn__9streambufFPCci (code) from ./libACE.sl
/usr/lib/dld.sl: Unresolved symbol: __dt__9streambufFv (code) from ./libACE.sl
/usr/lib/dld.sl: Unresolved symbol: __ls__7ostreamFPCc (code) from ./libACE.sl
/usr/lib/dld.sl: Unresolved symbol: flush__7ostreamFv (code) from ./libACE.sl
/usr/lib/dld.sl: Unresolved symbol: doallocate__9streambufFv (code) from ./libACE.sl
/usr/lib/dld.sl: Unresolved symbol: open__8ofstreamFPCciT2 (code) from ./libACE.sl
/usr/lib/dld.sl: Unresolved symbol: tellp__7ostreamFv (code) from ./libACE.sl
/usr/lib/dld.sl: Unresolved symbol: close__11fstreambaseFv (code) from ./libACE.sl
/usr/lib/dld.sl: Unresolved symbol: __ct__9streambufFv_2 (code) from ./libACE.sl
/usr/lib/dld.sl: Unresolved symbol: __ct__8ofstreamFPCciT2 (code) from ./libACE.sl
/usr/lib/dld.sl: Unresolved symbol: seekoff__9streambufFlQ2_3ios8seek_diri (code) from ./libACE.sl
/usr/lib/dld.sl: Unresolved symbol: __dt__13Iostream_initFv (code) from ./libACE.sl
/usr/lib/dld.sl: Unresolved symbol: __ct__13Iostream_initFv_1 (code) from ./libACE.sl
/usr/lib/dld.sl: Unresolved symbol: seekpos__9streambufFli (code) from ./libACE.sl
/usr/lib/dld.sl: Unresolved symbol: setbuf__9streambufFPci (code) from ./libACE.sl
/usr/lib/dld.sl: Unresolved symbol: pbackfail__9streambufFi (code) from ./libACE.sl
/usr/lib/dld.sl: Unresolved symbol: xsgetn__9streambufFPci (code) from ./libACE.sl
Abort(coredump)

Can anyone make any sence of this error and let me know how I can avoid it? I havent got a clue!

I'm using HP-UX 11.11 with aCC compiler version 3.33
The libACE.sl library is an existing 3rd party library. I require to load this library in a project i'm doing hence the development of the test Java application! Also worth noting is I can re build the libACE.sl file if required using what ever compiler switches that maybe be needed.

[Steve Steel]

Hi

Do you have

Patch Name: PHSS_26263

Patch Description: s700_800 11.11 ld(1) and linker tools cumulative patch

Creation Date: 02/04/12

Post Date: 02/04/18

Hardware Platforms - OS Releases:
s700: 11.11
s800: 11.11
The new dynamic linker has support for a new
environment variable LD_PRELOAD through which libraries
can be dynamically loaded and used for symbol
resolution.


Steve Steel

[Mike Stroyan]

Those missing symbols come from libstream.sl. It looks like the java command is linked with libCsup but not libstream. You may get your shared library working by linking it with -lstream. There is a working example of aCC jni at
http://www.hp.com/products1/unix/java/infolibrary/prog_guide/java1_3/JNI_java2.html#java_native_ac++

Follow the link line from that example.