+(defcustom ls-lisp-use-string-collate
+ (cond ((memq ls-lisp-emulation '(MacOS UNIX)) nil)
+ (t t)) ; GNU/Linux or MS-Windows emulate GNU ls
+ "Non-nil causes ls-lisp to sort files in locale-dependent collation order.
+
+A value of nil means use ordinary string comparison (see `compare-strings')
+for sorting files. A non-nil value uses `string-collate-lessp' instead,
+which more closely emulates what GNU `ls' does.
+
+On GNU/Linux systems, if the locale's codeset specifies UTF-8, as
+in \"en_US.UTF-8\", the collation order follows the Unicode
+Collation Algorithm (UCA), which places together file names that
+differ only in punctuation characters. On MS-Windows, customize
+the option `ls-lisp-UCA-like-collation' to a non-nil value to get
+similar behavior."
+ :version "25.1"
+ :set-after '(ls-lisp-emulation)
+ :type 'boolean
+ :group 'ls-lisp)
+
+(defcustom ls-lisp-UCA-like-collation t
+ "Non-nil means force ls-lisp use a collation order compatible with UCA.
+
+UCA is the Unicode Collation Algorithm. GNU/Linux systems automatically
+follow it in their string-collation routines if the locale specifies
+UTF-8 as its codeset. On MS-Windows, customize this option to a non-nil
+value to get similar behavior.
+
+When this option is non-nil, and `ls-lisp-use-string-collate' is also
+non-nil, the collation order produced on MS-Windows will ignore
+punctuation and symbol characters, which will, for example, place
+\`.foo' near `foo'. See the documentation of `string-collate-lessp'
+and `w32-collate-ignore-punctuation' for more details.
+
+This option is ignored on platforms other than MS-Windows; to
+control the collation ordering of the file names on those other
+systems, set your locale instead."
+ :version "25.1"
+ :type 'boolean
+ :group 'ls-lisp)
+