There is a bit of a catch-22 with polybori and mpfr on 't2' which I 
believe makes a need for

http://trac.sagemath.org/sage_trac/ticket/6438

to be incorporated in 4.1.1, so it needs a reviewer, despite the fact I 
agree it is not the easiest patch to review. It is complicated by the 
facts that

* I only wanted to apply the patch on machines with the sun4v 
architecture, to keep maximum performance on other Solaris machines.
* I wanted to be able to override the default.

Anyway, the catch-22 is this.

1) MPFR will not pass tests on 't2' unless a gcc no newer than 4.2.4 is 
used. So it will fail if the latest (gcc 4.4.0) is used.

Patch

http://trac.sagemath.org/sage_trac/ticket/6438

will allow all mpfr tests to pass on 't2' with any gcc version I have 
tried.

2) Polybori will build with gcc 4.4.0 on SPARC but not with gcc 4.2.4. 
(To get it to build on SPARC, one must not have the Sun tools in the 
patch).

Alexander Dreyer is looking at several polibori issues. From what I 
gather, polybori uses SCons which is a tool that is supposed to make 
building easier, though I have never personally used SCons.

Dave



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