configure --help documents --disable-xattr-support, but the code supports only -enable-xattr-support
configure defaults to auto-enabled xattr support, and --disable-xattr-support turns it off (note that SUPPORT_XATTRS gets disabled). If you're having a problem, please let us know what that is.
(In reply to comment #1)
Oops. I misread the code to say that support defaulted to off. Sorry to waste your time.