[Bug localedata/18943] New: Collation of NFD strings

["egmont at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=18943

            Bug ID: 18943
           Summary: Collation of NFD strings
           Product: glibc
           Version: 2.22
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: localedata
          Assignee: unassigned at sourceware dot org
          Reporter: egmont at gmail dot com
                CC: libc-locales at sourceware dot org
  Target Milestone: ---

Forking off from bug 18927 comment 8 & 11:

Collate definitions currently assume the input to be in NFC. If the available
UTF-8 unittests are converted to NFD (the localedata/*.in files which have
UTF-8 in Makefile's test-input) then they fail.

It would be nice to automatically make normalization the lowest priority factor
when deciding on collation, so that different normalizations of the same word
are as close to each other as possible. That is, to implement it once (e.g. in
iso14651_common) without having to modify individual locale definitions.

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