>>>> "Stephen" == Stephen J Turnbull
<turnbull(a)sk.tsukuba.ac.jp> writes: 
Stephen> I think this may be in the Unicode standard already, although the
Stephen> standard probably doesn't have a glyph (wasn't decided yet). 
I'll
Stephen> look.  I've seen something about this somewhere....
From Documentation/Configure.help of Linux 2.2.0-pre4: 
nls iso8859-15
CONFIG_NLS_ISO8859_15
  If you want to display filenames with native language characters
  from the Microsoft fat filesystem family or from JOLIET CDROMs
  correctly on the screen, you need to include the appropriate
  input/output character sets. Say Y here for the Latin 9 character
  set, which covers most West European languages such as Albanian,
  Catalan, Danish, Dutch, English, Estonian, Faeroese, Finnish,
  French, German, Galician, Irish, Icelandic, Italian, Norwegian,
  Portuguese, Spanish, Swedish, and Valencian. Latin 9 is an update to
  Latin 1 (ISO 8859-1) that removes a handful of rarely used
  characters and instead adds support for Estonian, corrects the
  support for French and Finnish, and adds the new Euro character.  If
  unsure, say Y.