New language support : Vala

[Abderrahim KITOUNI <a.kitouni@gmail.com>]

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Hi all,

Here is a patch I wrote last summer that adds support for a new language to gdb.
It's called Vala [1], it's a high level programming language (like C# or Java)
and compiles to GObject C.

Here is a brief changelog :

buildsym.c : deduce the language from filename (like f2c).
dwarf2read.c : use that information (it's only used for stabs right now).
c-lang.[ch] : make c_emit_char public.
eval.c : use current language's value_of_this to evaluate OP_THIS.
stack.c : don't print _tmp* variables in vala
symtab.c, gdbtypes.c, linespec.c, valops.c: add some vala logic.
defs.h, symfile.c : add the new language.
vala-lang.[ch], vala-print.c : new files.

I didn't write a parser, I just used the java one. The attached patch
is made with gdb 6.8

[1] http://live.gnome.org/Vala

Regards,
Abderrahim

P.S. I don't have a copyright assignment yet.

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