Re: RES: RTEMS with C++

At 10:09 AM 10/11/2006, you wrote:
>Angelo, Leon, Chrises (Welch and Johns 
>
>Thank you for your answers.
>
>Good to know that I'm wrong about RTEMS and C++, but I have to convince some
>other people here too.
>
>We'll start developing new software for the space area in C. We already have
>experience with software for satellites, but using assembly - ok, *I* don't
>have; I'm the new guy here.

My experience is that using the C++ compiler will cost you virtually 
nothing in performance if you don't use the expensive C++ features, 
and provides some benefits such as:
- Possibly improved type checking
- Inline functions (the efficiency of macros without the headaches)
- The ability to overload functions based on the data type (resolved 
at compile time so it doesn't add overhead)
- The ability to declare variables where they are needed rather than 
at the beginning of the function (some may not like that style, but I do)
- The flexibility to gradually move toward object oriented 
programming if desired (you won't want to go back to straight C)

You can avoid the overhead often associated with C++ by skipping 
things like exceptions, RTTI, STL and I/O streams.  You may be able 
to turn some of them off with compiler switches (RTTI and exceptions) 
and just not use STL and I/O streams.  That being said, consider 
carefully how much extra work it is worth to save a few bytes and 
processor cycles up front.