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From: =?utf-8?Q?Yannick_Duch=C3=AAne_=28Hibou57?=
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 <yannick_duchene@yahoo.fr>
Newsgroups: comp.lang.ada
Subject: Re: Curiosity rover on Mars
Date: Thu, 09 Aug 2012 17:37:18 +0200
Organization: Ada @ Home
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Date: 2012-08-09T17:37:18+02:00
List-Id: <comp.lang.ada>

Le Thu, 09 Aug 2012 07:23:47 +0200, Per Sandberg  =

<per.sandberg@sandat.dyndns.org> a =C3=A9crit:
> If the automated tool chain is:
>
>  "C -> Assembly -> MachineCode"
>  "Ada -> Assembly -> MachineCode"
>  "Ada -> C -> Assembly -> MachineCode"
>  "simulink -> C -> Assembly -> MachineCode"
>  "simulink -> Ada -> C -> Assembly -> MachineCode"
>
> All the above scenarios are possible so in what language is the system=

> written in ??

Seems this was "MATLAB -> C -> =E2=80=A6" and "Formal Modelling -> C -> =
=E2=80=A6", which  =

is not the same as C alone. But seems some part were written in C by han=
d,  =

1/5 of the whole. The C compiler they used is probably highly trusted to=
o,  =

and even perhaps formally verified.

When high level techniques are used, the target language is not that  =

important, except if the target is to be updated or tweaked by hand late=
r  =

(but that would probably brake the model, if formal techniques are not  =

used).

Please, don't throw away that example to any one, most won't understand =
C  =

as a target language and C as a main design language is not the same, an=
d  =

they would do biased comparison with Ada.

-- =

=E2=80=9CSyntactic sugar causes cancer of the semi-colons.=E2=80=9D [1]
=E2=80=9CStructured Programming supports the law of the excluded muddle.=
=E2=80=9D [1]
[1]: Epigrams on Programming =E2=80=94 Alan J. =E2=80=94 P. Yale Univers=
ity