UnsatisfiedLinkError using clojure.lang.RT/loadLibrary

[Antonio Recio]

When I try to load native libraries in the System ClassLoader I get an error of cannot open shared object file, and I don't know how to solve it.

In linux in REPL :

clojure java -Djava.library.path=/usr/local/lib/vtk-5.9/ -cp /usr/share/java/clojure.jar:/usr/local/lib/vtk-5.9/java/vtk.jar clojure.main

when I execute this code :

(ns project.core

  (:import (javax.swing JButton JFrame JPanel)

           (vtk vtkConeSource vtkPolyDataMapper vtkRenderWindow

                vtkRenderWindowInteractor vtkCamera vtkActor vtkRenderer

                vtkInteractorStyleTrackballCamera)))

(clojure.lang.RT/loadLibrary "vtkCommonJava")

I obtain this error :

UnsatisfiedLinkError /usr/local/lib/vtk-5.9/libvtkCommonJava.so.5.9.0: libvtkCommon.so.5.9: cannot open shared object file: No such file or directory  java.lang.ClassLoader$NativeLibrary.load (ClassLoader.java:-2)

[Baishampayan Ghose]

It seems the JVM is unable to locate certain shared library in the
path you specified. Can you see whether that .so file actually exists
in that directory?

This is what the VTK wiki says about this type of errors -
http://www.vtk.org/Wiki/VTK/FAQ#When_I_try_to_run_my_program_with_Java-wrapped_VTK.2C_why_do_I_get_.22java.lang.UnsatisfiedLinkError:_no_vtkSomeLibraryName.22.3F

Regards,
BG

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Baishampayan Ghose
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[Dave Ray]

java.library.path is only good for the first "layer" of libraries you
load. Any dependent libs (like libvtkCommon.so) are loaded with the
normal dynamic loading provided by the OS. So, i think there's two
options:

* Just use LD_LIBRARY_PATH env variable (or OS equivalent) and don't
bother with java.library.path.
* Make sure all the libs are loaded manually in the right order:

(clojure.lang.RT/loadLibrary "vtkCommon")
(clojure.lang.RT/loadLibrary "vtkCommonJava")

Now the "vtkCommon" lib is already loaded before "vtkCommonJava". Of
course, this means you have to figure out the deps, sort them, and
deal with changes over time. Good times.

Hope this helps,

Dave