Re: [Vala] Vala for embedded systems, IDEs, debugging

[Adrian Stern <adrian stern screenfood com>]

But didn't they drop the POSIX Profile with Vala 0.17.4?


Freundliche Grüsse / Best Regards / Meilleures salutations
Adrian Stern

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Adrian Stern
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-----Ursprüngliche Nachricht-----
Von: vala-list-bounces gnome org [mailto:vala-list-bounces gnome org] Im Auftrag von Thomas Jollans
Gesendet: Dienstag, 11. September 2012 17:12
An: vala-list gnome org
Betreff: Re: [Vala] Vala for embedded systems, IDEs, debugging


> -----Ursprüngliche Nachricht-----
> Von: vala-list-bounces gnome org [mailto:vala-list-bounces gnome org]
> Im Auftrag von Joe Dluzen
> Gesendet: Montag, 10. September 2012 16:32
> An: vala-list gnome org
> Betreff: [Vala] Vala for embedded systems, IDEs, debugging
>
> Hi all,
>
> I've been following Vala for some time now, and am interested in using
> it for embedded systems. Does anyone else have experience with that?
> I'd like to hear both good and bad experiences.

 On Tue, 11 Sep 2012 11:15:43 +0000, Adrian Stern wrote:
> Hey There
>
> I'am also very intressted in hearing about this. Does vala work on the
> ARMv6 architecture?


 Vala is not specific to any processor architecture. Vala code is  compiled to C code, which is then compiled 
by GCC to machine code. GCC  has good support for cross-compiling, so with a suitably powerful build  system 
that knows how to call valac and a cross-gcc, (the autotools will  do the trick if used properly) the 
language is not an issue.

 So the more interesting question is: can and do you want to use glib?
 Vala is generally used with glib/gobject, and many of its features  require linking against glib (which may 
be impractical on your embedded  system, depending on the specs/requirements), but valac does have a  POSIX 
profile, which will generate POSIX-compliant C code without the  glib dependency. See  
http://stackoverflow.com/questions/9550000/can-vala-be-used-without-gobject

 So - using Vala on an embedded system is quite possible, but if you  choose to forego glib, you will have to 
make do without many of Vala's  object-oriented features.

> I have some related questions I hope to get some answers for:
>
> Is remote debugging supported?

 Vala can be debugged with gdb. gdb is the swiss army knife of
 debugging, embedded/remote included.

> How is the IDE support? I checked the tools section of the website,
> the most up to date one seemed to be MonoDevelop.

 IDE support is dismal. If you want integrated editing and debugging,
 your options are Anjuta and MonoDevelop, and from a brief look a few
 months ago, Anjuta's Vala support is quite limited, and MonoDevelop's
 Vala support is somewhat broken. (it looks like it used to be good, and
 then things changed, but I don't know)

> What about crash dumps, is there debugging support for them?

 I'm not sure about that, but in general, you can use all features of
 gdb and nemiver (a graphical front-end to gdb, and probably the most
 pleasant Vala debugging experience around at this point) with Vala, but
 will be quite aware of the fact that you're actually debugging C code
 with Vala source line number annotations.

 Thomas



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