On Tue, Apr 27, 2010 at 9:23 AM, Bill Hart <goodwillh...@googlemail.com> wrote:
> Hi William,
>
> What are the major differences in GCC 4.5.0 which seem to be affecting
> Sage?

(1) New bug(s) in GCC-4.5.0, especially optimization related issues :-)

(2) Tighter adherence to C++ standards.

> Is there something new that we should be aware of when writing
> code for this compiler?

MPIR builds fine... but a little bit of zn_poly had to be changed due
to (2) above.

>
> Bill.
>
> On Apr 26, 9:15 pm, William Stein <wst...@gmail.com> wrote:
>> Hi,
>>
>> Main point of this email: if anybody else is trying to port Sage work
>> with GCC-4.5.0, we won't duplicate effort.)
>>
>> I'm working on trying to port Sage-4.4 to GCC-4.5.0.  There are many
>> issues on various OS's.
>>
>>   * pynac (solved) --http://trac.sagemath.org/sage_trac/ticket/8753
>>   * libpng --http://trac.sagemath.org/sage_trac/ticket/8767
>>   * linbox --http://trac.sagemath.org/sage_trac/ticket/8769
>>   * gfan --http://trac.sagemath.org/sage_trac/ticket/8770
>>
>> I don't know how many other issues will come up.  I've made all the
>> above blockers for sage-4.4.1, since they are visible on skynet, and
>> we *get* skynet in exchange for ensuring that Sage builds on skynet
>> with the latest released GCC.
>>
>> I'll be working on trying to fix the above today, and will be logged
>> into irc in case anybody has any ideas.
>>
>>  -- William
>>
>> --
>> William Stein
>> Professor of Mathematics
>> University of Washingtonhttp://wstein.org
>>
>> --
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-- 
William Stein
Professor of Mathematics
University of Washington
http://wstein.org

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