Gnulib ACL wrappers

[Ken Brown]

Paul,

This is a followup to a discussion on the Cygwin list.  See 
https://cygwin.com/ml/cygwin/2014-08/msg00531.html, and perhaps one or 
two earlier messages in the thread if you need more context.

Although Cygwin has Solaris ACL functions, emacs doesn't use these in 
fileio.c.  Shouldn't the Gnulib ACL wrappers provide support for these? 
 Or is there something needed in Cygwin to make this work?

Here's what's in config.h concerning ACLs:

#define EMACS_CONFIG_FEATURES "DBUS ACL GNUTLS LIBXML2 ZLIB"
/* #undef HAVE_ACLSORT */
/* #undef HAVE_ACLV_H */
/* #undef HAVE_ACLX_GET */
/* #undef HAVE_ACL_COPY_EXT_NATIVE */
/* #undef HAVE_ACL_CREATE_ENTRY_NP */
/* #undef HAVE_ACL_DELETE_DEF_FILE */
/* #undef HAVE_ACL_DELETE_FD_NP */
/* #undef HAVE_ACL_DELETE_FILE_NP */
/* #undef HAVE_ACL_ENTRIES */
/* #undef HAVE_ACL_EXTENDED_FILE */
/* #undef HAVE_ACL_FIRST_ENTRY */
/* #undef HAVE_ACL_FREE */
/* #undef HAVE_ACL_FREE_TEXT */
/* #undef HAVE_ACL_FROM_MODE */
/* #undef HAVE_ACL_FROM_TEXT */
/* #undef HAVE_ACL_GET_FD */
/* #undef HAVE_ACL_GET_FILE */
/* #undef HAVE_ACL_LIBACL_H */
/* #undef HAVE_ACL_SET_FD */
/* #undef HAVE_ACL_SET_FILE */
/* #undef HAVE_ACL_TO_SHORT_TEXT */
/* #undef HAVE_ACL_TRIVIAL */
/* #undef HAVE_ACL_TYPE_EXTENDED */
#define HAVE_FACL 1
/* #undef HAVE_GETACL */
/* #undef HAVE_STATACL */
#define HAVE_SYS_ACL_H 1
#define USE_ACL 1

Ken