As already reported in PR debug/41238, Comment #7, even after applying Jakubs patch there are still two comparison failures that break bootstrap. See the attachements there for details.
-- Summary: [4.5 regression] Comparison failure on Solaris 11/SPARC after VTA merge Product: gcc Version: 4.5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: bootstrap AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: ro at gcc dot gnu dot org GCC build triplet: sparc-sun-solaris2.11 GCC host triplet: sparc-sun-solaris2.11 GCC target triplet: sparc-sun-solaris2.11 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41247