Forgive if this issue has been addressed in the past. I didn't see it in a quick look through the archives.

I'm interested in using JNA within JRuby for two purposes:

- to call native libraries for functions that do not yet exist in the Java libraries (chown, fcntl, etc) - to provide a mechanism for loading C Ruby extensions

There's also a few native library implementations in the Ruby standard library I'd like to implement (DL, for general purpose dylib access; win32api for win32; gtk; tk; and on and on)

So I'm trying to get it up and working. The CLibrary example worked ok, but when I made my own (empty) interface and tried to Native.loadLibrary("libc.dylib", LibC.class) I got this:

irb(main):004:0> libc = Native.loadLibrary("libc.dylib", java.lang.Class.forName("LibC")) Exception in thread "main" java.lang.UnsatisfiedLinkError: Cannot locate function 'toString' at com.sun.jna.NativeLibrary.getFunctionAddress(NativeLibrary.java:197) at com.sun.jna.Function.<init>(Function.java:106) at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:184) at com.sun.jna.Library$Handler.invoke(Library.java:142) at $Proxy4.toString(Unknown Source) at org.jruby.javasupport.JavaObject.to_s(JavaObject.java:132)

Pointers?

- Charlie