well, building gcc cvs trunk for sparc-linux and running the testsuite shows tests not run and the log file message is this:
failed run-time assertion : Tasking not implemented on this configuration -- Summary: failed run-time assertion : Tasking not implemented on this configuration on sparc-linux Product: gcc Version: 4.0.0 Status: UNCONFIRMED Severity: normal Priority: P2 Component: ada AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: christian dot joensson at gmail dot com CC: gcc-bugs at gcc dot gnu dot org GCC build triplet: sparc-unknown-linux-gnu GCC host triplet: sparc-unknown-linux-gnu GCC target triplet: sparc-unknown-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20035