AVR-Chat

At 07:37 PM 11/4/2007 -0700, Cat C wrote:
>That's true, but I think it's also true that as things are upgraded, things
>and bugs get fixed...

Or just change.  The trouble I have is you appear to have no way of telling 
whether the change in behaviour is the result of a bug fix,  a modified 
library function or just different code generation.

I've seen my share of compiler bugs (one compiler I used, I was always 
using a beta because I kept hitting bugs in the release compiler) but more 
often when suspicion was cast on the compiler the source was at fault.

OTOH I don't use architecture specific compiler extensions like inline 
assembly and interrupt qualifiers if I can avoid it (and with a decent 
compiler you can) simply because I've found them to be too unreliable to be 
relied upon.

One compiler had the behaviour that if ragged as re-entrant made all the 
local variables static!  Some one had decided that re-entrant meant that 
the routine would never be called more than once in a call chain (or from 
multiple threads).


>The (maybe) worse thing is (and I think I have a case) when something ONLY
>works with an older tool... I think that's why I downgraded in the first
>place...

I've seen that on occasion, rarely on a compiler (except perhaps for 
architecture extensions), usually it was traceable back relying on 
unspecified compiler behaviour.  Occasionally on a vendors decision to 
change how a utility worked.  After all why should the command line 
arguments remain the same between versions?

>Thanks again for your help, everybody

Your welcome, although I don't think we did much other than ask endless 
questions.

Robert

http://www.aeolusdevelopment.com/

 From the Divided by a Common Language File (Edited to protect the guilty)
ME - "I'd like to get Price and delivery for connector Part # XXXXX"
Dist./Rep - "$X.XX Lead time 37 days"
ME - "Anything we can do about lead time?  37 days seems a bit high."
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