arla 0.22 compile errors on Openbsd

[wwshen@eecs.umich.edu]

     I am trying to install arla 0.22 in my Openbsd.
But I get the following error:

.......................................................
xfs_vfsops-openbsd.c:103: warning: excess elements in struct initializer
after `xfs_vfc'
xfs_vfsops-openbsd.c:104: warning: excess elements in struct initializer
after `xfs_vfc'
xfs_vfsops-openbsd.c:105: warning: excess elements in struct initializer
after `xfs_vfc'
xfs_vfsops-openbsd.c:107: warning: excess elements in struct initializer
after `xfs_vfc'
xfs_vfsops-openbsd.c: In function `vfs_register':
xfs_vfsops-openbsd.c:118: `vfsconf' undeclared (first use this function)
xfs_vfsops-openbsd.c:118: (Each undeclared identifier is reported only
once
xfs_vfsops-openbsd.c:118: for each function it appears in.)
xfs_vfsops-openbsd.c:120: dereferencing pointer to incomplete type
xfs_vfsops-openbsd.c:120: dereferencing pointer to incomplete type
xfs_vfsops-openbsd.c:121: dereferencing pointer to incomplete type
xfs_vfsops-openbsd.c:121: dereferencing pointer to incomplete type
xfs_vfsops-openbsd.c:124: `maxvfsconf' undeclared (first use this
function)
xfs_vfsops-openbsd.c:129: dereferencing pointer to incomplete type
xfs_vfsops-openbsd.c:133: dereferencing pointer to incomplete type
xfs_vfsops-openbsd.c: In function `vfs_unregister':
xfs_vfsops-openbsd.c:147: `vfsconf' undeclared (first use this function)
xfs_vfsops-openbsd.c:149: dereferencing pointer to incomplete type
xfs_vfsops-openbsd.c:149: dereferencing pointer to incomplete type
xfs_vfsops-openbsd.c:150: dereferencing pointer to incomplete type
xfs_vfsops-openbsd.c:150: dereferencing pointer to incomplete type
xfs_vfsops-openbsd.c:156: dereferencing pointer to incomplete type
xfs_vfsops-openbsd.c:160: dereferencing pointer to incomplete type
xfs_vfsops-openbsd.c:162: `maxvfsconf' undeclared (first use this
function)
*** Error code 1

Stop.
*** Error code 1

Stop.
*** Error code 1

Stop.

     Could anyone tell me how I can fix it? Thanks.
wuwei