mclow.lists added a comment.
Maybe something like this? (untested)
template <class _A1>
_LIBCPP_ALWAYS_INLINE
typename std::enable_if<!std::is_floating_point<_A1>::value, bool>::type
__libcpp_isfinite(_A1 __lcpp_x) _NOEXCEPT
{
return isfinite(__lcpp_x);
}
template <class _A1>
_LIBCPP_ALWAYS_INLINE
typename std::enable_if<std::is_floating_point<_A1>::value, bool>::type
__libcpp_isfinite(_A1 __lcpp_x) _NOEXCEPT
{
#if __has_builtin(__builtin_isfinite)
return __builtin_isfinite(__lcpp_x);
#else
return isfinite(__lcpp_x);
#endif
}
https://reviews.llvm.org/D18639
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