1) An ATLAS patch to ensure that SAGE_ATLAS_LIB actually works
http://trac.sagemath.org/sage_trac/ticket/9780
2) A cliquer patch
http://trac.sagemath.org/sage_trac/ticket/9871
that changes the compiler flags so the shared library does not have text 
relocations. The patch attached to the ticket looks big, but 80% of that is 
because the original Makefile was not under revision control. Someone had put a 
"patch" directory in .hgignore.
I'm aware of two other problems that will probably stop a 64-bit build of 
Solaris on any form of Solaris.
1) ECL
http://trac.sagemath.org/sage_trac/ticket/9840
2) PolyBoRi
http://trac.sagemath.org/sage_trac/ticket/9872
Neither of these two look trivial to solve.
Dave