https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79017
--- Comment #14 from Jonathan Wakely <redi at gcc dot gnu.org> --- OK, thanks. I'm not going to try to add declarations like the libc++ patch does, as it looks like that would only be correct for Snow Leopard and not earlier. I'll just add more fine-grained configure checks and if they're not declared in <math.h> then they won't be available, period. There's only so much we can do to work around buggy C libraries on the target.
