install xmms with this package...
http://www.slackware.com/pb/?vers=sl...-1.2.10-i486-1
Go back to the plugin...
rerun "./configure" and it should finish without error.
Then run:
make
su #switch to root
make install #installs to the system wide install of xmms
exit #you don't want to be root for the next step.
cp /usr/local/lib/xmms/General/libitouch.* ~/.bmp/Plugins/ #copies over to BMP
su #switch to root again...
pkgtool #time to remove XMMS, go to uninstall package and find XMMS from the list, select it and hit "OK"
Then restart BMP if it is running...
Done.
If the plugin fails to work it might not be able to work with BMP..