> On Wed, Mar 23, 2011 at 10:28:04AM -0400, David Fang wrote:
>>> It was originally thought that the failure was due to 10.5 using
>>> gcc-4.0, but the test still fails the same way with revision -4 which
>>> forces gcc-4.2.
>>>
>>> For the record, ppl9-0.11.2-1 does pass tests OK.  Would it make sense
>>> to update gcc-4(4/5) to use ppl9?
>>
>> Jack and I recently discussed a strategy for upgrading the
>> gmp/mpfr/mpc/ppl/cloog dependencies offline.  Jack, care to summarize?
>>
>> Fang
>
>   Currently mpc and ppl9 are built against ppl9. The gcc44-4.4.5 package
> however is incompatible with ppl9 and must be built against ppl for its 
> graphite
> support. The gcc45-4.5.3 (unreleased) package can be built against ppl9 but
> requires the legacy cloog-ppl which is currently built against ppl. So we have
> two options to complete the migration to gmp5/libmpfr4...
>
> 1) Patch ppl so it can be built against gmp5 and rebuild cloog against gmp5
> as well as gcc44-4.4.5 and gcc45-4.5.3 against gmp5/libmpfr4.

So ppl in my experimental tree is built against gmp5 and exhibits the 
exact same test failures that people are seeing.  [Need to report this 
upstream to ppl-devel.] If you accept (?) that this new ppl-gmp5 is no 
worse than ppl-gmp4, then 1) is feasible.

> 2) Disable graphite in gcc44-4.4.5 using --without-ppl --without-cloog 
> and rebuild cloog against ppl9/gmp5 and gcc45-4.5.3 against 
> ppl9/gmp5/libmpfr4/cloog.
>
> I favor the second option myself since graphite is barely usable in gcc44. In
> gcc45, graphite works reasonably well but it won't be until gcc46 that 
> graphite
> never misses vertorization opportunities.
>              Jack



David Fang
http://www.csl.cornell.edu/~fang/
http://www.achronix.com/


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