RE: More volatile musings [was: Re: [avr-gcc-list] memcpy() : problem when passing destination pointer]

[John Regehr]

Hi Eric-

I'm willing to do some avr-gcc bug-finding but (most likely due to my own 
ineptitude and lack of spare time) I always run into problems building the 
latest and greatest.  I just checked avr freaks and found a pointer to 
build scripts for avr-gcc-4.3.3.  Would bug reports for that version be 
useful?  If not is there a definitive script for building a fully patched 
avr-gcc-pre-4.4.0 on Linux?  Thanks,

John Regehr



On Thu, 12 Feb 2009, Weddington, Eric wrote:

> > -----Original Message-----
> > From:
> > address@hidden
> > [mailto:address@hidden
> > org] On Behalf Of Andy Warner
> > Sent: Thursday, February 12, 2009 7:23 AM
> > To: address@hidden
> > Subject: More volatile musings [was: Re: [avr-gcc-list]
> > memcpy() : problem when passing destination pointer]
> >
> > Here is a paper on the volatile performance/conformance of
> > various compilers (mostly gcc-based.) Including avr-gcc:
> >
> > http://www.cs.utah.edu/~regehr/papers/emsoft08-preprint.pdf
> >
> > While most of the problems referred to in this thread (and all the
> > problems in Vincent's original posting) were programmer-induced,
> > the paper does talk about how the compilers can error, how to detect
> > it and possible workarounds.
>
> FYI, Dr. John Regehr, and Eric Eide were kind enough to let me review a 
> pre-print of that paper some months ago. I agree that it is a very interesting 
> paper, and I'm very interested in incorporating their testing system too. Yes, 
> there is certainly enough work to do.