https://gcc.gnu.org/bugzilla/show_bug.cgi?id=20585 Bug 20585 depends on bug 28484, which changed state.
Bug 28484 Summary: [F03] system_clock with real-type count_rate does not compile https://gcc.gnu.org/bugzilla/show_bug.cgi?id=28484 What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED