[gfortran,patch] Internationalisation of the Fortran front-end

[FX Coudert]

Hi all,

Attached is a patch (i18n.diff) that adds internationalization to the 
fortran front-end: it enables the compiler to issue localised error and 
warning messages. This is done in two complementary ways:

   1. Messages issued by gfc_error, gfc_warning and other functions 
called on constant strings are translated using the msgid convention. 
That is, developpers will not have to worry about the localization of 
such messages.

   2. Some of the messages are handled in a... rudimentary way. For 
those, I added manual translation macros: _(). For example, see changes 
in arith.c

Finally, I removed some nasty very english-specific constructions: exit 
gfc_article()!

I think while this is not a vital feature (although some will argue that 
localisation is an important composant of the GNU project), the earlier 
it can go in, the less work for the translators (and the better the 
translation).

Built and regtested on i686-linux.
OK for 4.1? (and do we want it for 4.0)


FX

PS: I don't know if a complete ChangeLog is needed, or if I can just 
list the files and functions and say "Added localisation support". I 
added the gcc.pot generated with maintainer mode, so that you can check 
it if you want.
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