I got this error after installing:
./ioquake3.i386: error while loading shared libraries: libopenal.so.0: cannot open shared object file: No such file or directory
Make sure you have libopenal1 package installed and then make a symlink from /usr/lib/libopenal.so.0 to the actual library file.
# ln -s /usr/lib/libopenal.so.1.4.272 /usr/lib/libopenal.so.0
Run ldconfig just to be safe.
ioquake3 now works.