https://github.com/tuna/rsync/blob/master/configure.ac#L981
Looks like it was short-circuited to use Solaris ACLs. I'll send the RSYNC guys a patch. Defeating the case statement does pick up Posix ACLs. $ grep -i acl config.status S["LIBS"]="-lacl " D["HAVE_SYS_ACL_H"]=" 1" D["HAVE_ACL_LIBACL_H"]=" 1" D["HAVE_ACLSORT"]=" 1" D["HAVE_LIBACL"]=" 1" D["HAVE_POSIX_ACLS"]=" 1" D["SUPPORT_ACLS"]=" 1 I don't know what the elegant solution is to intuit the need to include cygwin/acl.h if HAVE_SOLARIS_ACLS though. -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple