'lround' is not a member of 'std'

Hi!

When compiling mame on NetBSD-current, I see

../../../../../src/osd/modules/input/input_sdl.cpp:891:16: error: 'lround' is not a member of 'std'; did you mean 'lround'?

I worked around it by removing the "std::" in the package and reported
this upstream.

Upstream replied[1]:

--- begin ---

The title of this issue is factually incorrect – lround is a member of namespace std (round and return long int, overloaded for standard floating point types): https://en.cppreference.com/w/cpp/numeric/math/round

This is implemented correctly in GNU libstdc++ and llvm libc++. The patch is not correct.

--- end ---

Is there something we need to fix in NetBSD here?

Thanks,
 Thomas

[1] https://github.com/mamedev/mame/issues/12458