import std.c.math : lrintf;

void main()
{
    lrintf(4.0);
}

Error 42: Symbol Undefined _lrintf
--- errorlevel 1

Andrej Mitrovic Wrote:

> import std.c.math : lrintf;
> 
> void main()
> {
>     lrintf(4.0);
> }
> 
> Error 42: Symbol Undefined _lrintf
> --- errorlevel 1

Just a guess, libm?

dmd testfile.d -L-lm

m is the C math library for linux right? Windows I don't know.

I have a hunch that this function is only available on Linux. If that's so it should maybe be put in a version(linux) statement.

But I just found lrint is in std.math as well so I can actually use that.

Andrej Mitrovic wrote:
> I have a hunch that this function is only available on Linux. If
> that's so it should maybe be put in a version(linux) statement.
> 
> But I just found lrint is in std.math as well so I can actually use that.

There should be no reason to use anything from c.math.

Okay. Some C code used lrintf() so I was trying to find it to port it to D.