Apparently gcc-4.5 is not good enough as a bootstrap compiler for gcc-4.6. Please could somebody check/confirm that using gcc-4.4 as the bootstrap compiler works around the build failure?
As gcc-4.6 is already available on both kfreebsd-*, wouldn't be better to use gcc-4.6 as a bootstrap compiler for gcc-4.6 ? As a side note, the kfreebsd-8 built by gcc-4.6 seems to work (#594288). Petr