Strange C++ function pointer test

[Jonathan Wakely]

On 31 December 2015 at 11:54, Dominik Vogt wrote:
> Is there a requirement for a certain minimum Glibc version for
> this to work?

It doesn't work with any glibc, because it doesn't declare the C++ overloads.

Libstdc++ has an include/c_compatibility/math.h header that would
include <cmath> (which declares the C++ overloads) and then pull them
into the global namespace, but that isn't used on GNU/Linux, and would
create other problems.

This is already in Bugzilla: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60401