Re: What VxWorks version to officially support?

[Andrew J. <an...@ap...>]

Hi Marty,

On 2013-02-20 Marty Kraimer wrote:
> 
> Is there any chance that we can try to allow full use of the c++11
> standard on all supported platforms?

Not if you're wanting to support vxWorks.  Even the latest vxWorks 6.9 only 
has gcc 4.3.3. (vxWorks 6.8 comes with gcc 4.1.2)

> You have as the supported platforms:
> >     Platforms Supported
> >
> > The following platforms are actively supported and tested:
> >
> >   * GNU/Linux on x86_64
> >   * vxWorks >= 6.6 on PowerPC or Intel CPUs

We're waiting for feedback on that from PSI, from either Dirk or Timo.

> I also have a question about how current vxWorks implementations
> implement new.
> Do current implementations have a good way to handle the heap?
> In the past the implementation caused severe memory fragmentation, which
> could be a show stopper for using the c++ standard library.

The system memory allocator in vxWorks 6.x uses a best fit algorithm so should 
not be subject to the memory fragmentation issues that the first fit code in 
vxWorks 5.x suffered from.  Not tested, but I don't really know how to do that 
anyway...

> What about RTEMS?

RTEMS 4.10 builds using gcc 4.4.6

- Andrew
-- 
There is no such thing as a free lunch.  When invited for lunch,
it is best to check if you are there to eat, or to be eaten.
-- Clive Robinson