------- Comment #15 from siarhei dot siamashka at gmail dot com 2010-05-03 23:45 ------- As found by Raúl, indeed this regression was introduced in r150091. Reverting this change in gcc 4.5.0 release resolves the problem.
Apparently the use of __builtin_unreachable() in gcc_assert macro (activated by !ENABLE_ASSERT_CHECKING) is triggering some kind of wrong-code bug on non x86/x86-64 platforms (at least arm and powerpc) and causes this bootstrap failure. There are some other __builtin_unreachable bugs in gcc bugzilla which are possibly related. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42347
