Gnutools: consideration for upgrade to GCC 4.6

[Frank Pagliughi]

On 01/17/2012 11:44 AM, Ilija Kocho wrote:
> On 17.01.2012 17:09, Stanislav Meduna wrote:
>> On 17.01.2012 10:36, Tomas Frydrych wrote:
>>
>>> Some of the more recent gccs were not producing usable binaries on some
>>> platforms (including arm) with the -Os option. I do not know if this is
>>> the case with 4.6.2, and I don't think ecos uses -Os by default, but it
>>> is probably worth checking whether this works (and at least documenting
>>> somewhere if it does not).
>> Do you happen to have more details on this - versions, flags used,
>> example to reproduce...?
>>
>> http://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html says
>>
>>    -Os enables all -O2 optimizations that do not typically increase
>>    code size. It also performs further optimizations designed
>>    to reduce code size.
>>
>> it would be good to know whether the problems come from -O2 (which
>> would be a major problem) or from these further optimizations.
>
> I am compiling with default eCos options (that include -O2). Haven't 
> noticed a problems so far.
>
>
> Ilija
>
It would be pretty cool if we made a script that downloaded and built 
the eCos GNU tools for the current "official" version. Add the script to 
the source control. That way we'd all have a good starting point when 
upgrading personal tool chains. And, while we're at it, update the 
ancient directions on the web site on how to build a tool chain:
     http://ecos.sourceware.org/build-toolchain.html

Frank