port math/gmp fails regression tests [WAS: port lang/gcc45 - not sure how to interpret GCC developers' advice]

[Anton Shterenlikht]

On Tue, Nov 16, 2010 at 09:31:37AM +0000, Anton Shterenlikht wrote:
> On Mon, Nov 15, 2010 at 10:48:20AM -0800, John-Mark Gurney wrote:
> > Anton Shterenlikht wrote this message on Mon, Nov 15, 2010 at 10:54 +0000:
> > > On sparc64 -current r212302 I'm having trouble
> > > building port lang/gcc45.
> > > 
> > > Before I go any further, let me just check if anybody
> > > on this list has built gcc45 successfully?
> > > 
> > > Here's my GCC bug submission:
> > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46086
> > > 
> > > I just can't understand what the GCC folks tell me to do.
> > > 
> > > They referred me to this page:
> > > http://gcc.gnu.org/install/specific.html#sparc-x-x
> > > 
> > > and apparently to this paragraph:
> > > 
> > > *quote*
> > > Newer versions of the GNU Multiple Precision Library (GMP),
> > > the MPFR library and the MPC library are known to be
> > > miscompiled by earlier versions of GCC on these platforms.
> > > We therefore recommend the use of the exact versions of
> > > these libraries listed as minimal versions in the prerequisites. 
> > > *end quote*
> > > 
> > > The prerequisites link lists:
> > > 
> > > GNU Multiple Precision Library (GMP) version 4.3.2 (or later)
> > > MPFR Library version 2.4.2 (or later)
> > > 
> > > I've installed:
> > > 
> > > gmp-5.0.1
> > > gmp-ecm-6.3
> > > mpfr-3.0.0
> > > 
> > > So do they mean to say that I should downgrade to GMP 4.3.2 and
> > > MPFR 2.4.2?
> > 
> > Yes, I believe that they do.  I think the important phrase is:
> > exact versions of these libraries listed as minimal versions
> > 
> > which isn't very clear, but saying use the minimal version listed on
> > the page...  They probably had someone try w/ 4.3.3 and wonder why it
> > wasn't working so they added the exact verbage...
> 
> ok, I get it. However, the ports above were pulled up and
> installed when I was building gcc45. So downgrading might
> break ports interdependency. I'll try instead to build GMP
> and MPFR with gcc44.

I've rebuilt GMP with gcc 4.4.6 20101026,
and discovered that it fails regression tests.
Here's my log:

http://seis.bris.ac.uk/~mexas/gmp-5.0.1-regression-test.log

Can anybody on this list confirm (or otherwise) this.

I also checked that GMP passes all tests fine on amd64 and ia64,
so the issue indeed seems to be sparc64 specific.

many thanks
anton

-- 
Anton Shterenlikht
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