http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59177
--- Comment #11 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Andy Lutomirski from comment #5) > # For clock_gettime, nanosleep and sched_yield support. > # NB: The default is [no], because otherwise it requires linking. > GLIBCXX_ENABLE_LIBSTDCXX_TIME([no]) > > Aside from the typo in the comment (the end of the sentence seems to have > disappeared), No, the sentence is complete. Comment 8 explains that we don't want to do tests that require running the linker for the default configuration, because that's not possible for bare metal targets.