Can't load a library that depends on another

Question

I built a library and it loaded perfectly (just for testing).
Now, my library is supposed use ALSA's API.
Now, I get to compile my library, just like before, but now I can't load the library. I get a UnsatisfiedLinkError. The message is a little cryptic: Can't load IA 32-bit .so on a IA 32-bit platform
It seems like when my library is being loaded, the alsa library on which it depends (libalsa09.so) can't be loaded. How can I avoid this? I added both my library's and alsa's directories to LD_LIBRARY_PATH, but I just can't get it done.
Here's what happens:
$ LD_LIBRARY_PATH=/usr/lib/ao/plugins-2:lib java -cp bin wmagic.basic.Wave 440
Can't load library wmagic_alsa
java.lang.UnsatisfiedLinkError: /home/antoranz/eclipse/europa/workspace/wmagic/lib/libwmagic_alsa.so: Can't load IA 32-bit .so on a IA 32-bit platform
        at java.lang.ClassLoader$NativeLibrary.load(Native Method)
        at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1751)
        at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1676)
        at java.lang.Runtime.loadLibrary0(Runtime.java:822)
        at java.lang.System.loadLibrary(System.java:993)
        at wmagic.basic.SoundOutput.initializeAlsa(SoundOutput.java:87)
        at wmagic.basic.SoundOutput.<init>(SoundOutput.java:29)
        at wmagic.basic.Wave.main(Wave.java:61)Maybe the problem is the way I'm creating my jni so (in an ant target):
<echo>Compiling Library</echo>
<exec executable="${Ccompiler}">
     <arg value="-o"/>
     <arg value="${library.dir}/libwmagic_alsa.so" />
     <arg value="-shared" />
     <arg value="-I${source.dir}/wmagic/alsa" />
     <arg value="-I${jni.includes.dir}" />
     <arg value="-I${jni.includes.dir}/linux" />
     <arg value="-lalsa09" />
     <arg value="-L/usr/lib/ao/plugins-2" />
     <arg value="${source.dir}/wmagic/alsa/wmagic_alsa.c" />
     <arg value="-static" />
     <arg value="-lc" />
</exec>How can I get it to work? I'm catching the exception and using Java Sound as a fall back, but I want to use alsa (and that's another thread in the forums: How to use alsa's default device in Java Sound... but nobody has told me how to... so don't go down that path, please. :-)).

Answer 1

If you are linking to a shared library then one of the following must be true.
1. The shared library must be in the shared library path of the OS
2. You must explicitly load the shared library first using an explicit path.