https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60637
--- Comment #5 from Marc Glisse <glisse at gcc dot gnu.org> --- (In reply to Jonathan Wakely from comment #4) > I think we can fix the C++98 std::signbit(_Tp) with: > > typedef typename __gnu_cxx::__promote<_Tp>::__type __type; > return sizeof(__type) == sizeof(long double) > ? __builtin_signbitl(__type(__f)) > : sizeof(__type) == sizeof(double) > ? __builtin_signbit(__type(__f)) > : __builtin_signbitf(__type(__f)); Why do you want to use a different code for C++98 and C++11? The best solution would be to remove the declaration in C++98, since it is not standard, but if we have to keep it, it would seem easier to share the code with C++11, no?
