Nicholas Matsakis wrote:
> Briefly, I am trying to call a native method under Linux. I have a
> decent understanding of the JNI, and have gotten my code to load under
> windows, but am unable to load the shared library under Linux. Other
> relevant details include my system profile: Slackware, libc.so.5, JDK 1.1.6v5
>
> As I understand it, the process is:
>
> 1) Write your java file, declaring native methods
> 2) Run javah on the file to get your headers
> 3) Implement the native methods in (my case in) C++
> 4) Compile the C++ code to object files
> 5) Link the object files into a shared library (are the following
> compiler options sufficient?)
>
> gcc -lm -shared -Wl,-soname,libreceng.so -o libreceng.so lots_of_files.o
>
> I am currently not interested in putting version numbers on my shared
> library, is that necessary?
>
> 6) Put the shared library in your shared library path. Where is this
> path define, exactly? I'm using tcsh, and I presume that $LPATH is the
> path I'm interested in.
>
> 7) Run your java.
> --------------------------------------
> At step 7 I get the following error:
>
> matsakis@natural-log>av index.html
> File not found (libreceng.so)
> Exception occurred during event dispatching:
> java.lang.UnsatisfiedLinkError: no receng in shared library path
> at java.lang.Runtime.loadLibrary(Runtime.java)
> at java.lang.System.loadLibrary(System.java)
> at NLI.RecEng.<init>(Demo.java:87)
> at NLI.Demo.evaluate(Demo.java:70)
> at NLI.Input_Panel.handleEvent(Input_Panel.java:38)
> at java.awt.Component.postEvent(Component.java:1986)
> at java.awt.Component.postEvent(Component.java:1996)
> at java.awt.Component.postEvent(Component.java:1996)
> at java.awt.Component.dispatchEventImpl(Component.java:1793)
> at java.awt.Component.dispatchEvent(Component.java:1708)
> at java.awt.EventDispatchThread.run(EventDispatchThread.java:81)
>
> Any suggestions?
>
> Nick Matsakis
I'm not 100% sure, but I believe you have to use -PIC (position independent code)
flag on the compile.
Peter Johnson
[EMAIL PROTECTED]
