https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78314
--- Comment #10 from nsz at gcc dot gnu.org --- it turns out the ieee_* functions are allowed in const expressions so they need to work at compile time too (see bug 78449), which of course won't work if they need runtime detection. so now compile-time and runtime behaviour of ieee_support_halting is different. so far no fortran expert clarified what is the expected semantics when you can only decide this at runtime (e.g. it might be better to always return false on targets that may not implement trapping, rather than report things inconsistently compile- vs runtime). (i think this bug can be closed, but then the other one has to be reopened).
