https://issues.dlang.org/show_bug.cgi?id=12415

Vladimir Panteleev <dlang-bugzilla@thecybershadow.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |WORKSFORME

--- Comment #1 from Vladimir Panteleev <dlang-bugzilla@thecybershadow.net> ---
As per the comment in core.stdc.math:

else version( CRuntime_Microsoft ) // fully supported since MSVCRT 12 (VS 2013)
only

So, you may need to update your Visual Studio edition.

The functions are correctly not defined for CRuntime_DigitalMars.

--