https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119408
--- Comment #24 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Maybe, but probably we need a whitelist or blacklist. Because e.g. powerpc64le-linux I guess wants libquadmath because it historically has been using it and long double depending on configuration sometimes is and sometimes is not IEEE quad. So maybe safer will be something along the lines of #c16, just with better wording of the comment (and for libquadmath too). Basically, we don't want to have libquadmath on targets which always have long double IEEE quad and where libquadmath wasn't used in the past.