LD_LIBRARY_PATH and other oddities

[d80tb7]

Hello all,

I'm trying to get something working with JNI and am having all sorts of problems. The biggest of these is I can't get java to find my shared libraries.

Here's a (very simple) test program I knocked up:



public static void main(String args[]) {


String javaLibraryPath = System.getProperty("java.library.path");

System.out.println("java.library.path="+javaLibraryPath);
System.loadLibrary("libjFFTW3");
}


The output of this is:


java.library.path=/usr/lib/jvm/java-1.5.0-sun-1.5.0.11/jre/lib/amd64/server:/usr/lib/jvm/java-1.5.0-sun-1.5.0.11/jre/lib/amd64:/usr/lib/jvm/java-1.5.0-sun-1.5.0.11/jre/../lib/amd64:/usr/lib/firefox
Exception in thread "main" java.lang.UnsatisfiedLinkError: no libjFFTW3 in java.library.path


This would imply that libjFFTW3 is not on the library path, however an ls on the first directory int he library path produces the following:



chris@lemming:/usr/lib/jvm/java-1.5.0-sun-1.5.0.11/jre/lib/amd64/server$ ls
libjFFTW3.so libjsig.so libjvm.so Xusage.txt


More puzzelingly I found several references on the internet that say that the results of java System.getProperty("java.library.path") should be the same as $LD_LIBRARY_PATH. However my $LD_LIBRARY_PATH actually references something completely different (my shared library is also in the LD_LIBRARY_PATH directory)


echo $LD_LIBRARY_PATH
/usr/local/lib


My questions therefore are:

1. Is there something wrong with the way I am calling System.loadLibrary()?
2. How do I edit the java.library.path if not by $LD_LIBRARY_PATH?
3. Does the fact that I'm running 64 bit have anything to do with this?

thanks in advance

chris

[oakz]

try:

System.loadLibrary("jFFTW3");

[d80tb7]

ah, that works!

thank you

Chris