Samba and XFS ACLs.

[Samba]

Hello,

I try to implement samba over an XFS filesystem with ACL support. The 
filesystem and the acls work perfectly but when I try to compile samba 
(2.2.2) with the --with-acl-support option, the XFS ACLs are not detected by 
the configure script : 

checking wether to support ACLs... checking for acl_get_file in -lacl... 
(cached) no
checking for ACL support... (cached) no

What is checked by the configure script and what shall I have forget to do 
with the installation of the ACLs?

Thanks a lot,
Jean-Michel.