ckout does not work with `long double`

[Sh0g0-1758]

Hello! I was doing the tutorial exercises for charm++ when I noticed that ckout does not work with long double. Program to reproduce this behaviour :

mainmodule play {
    mainchare start {
        entry start(CkArgMsg* msg);
    }
}

#include<stdio.h>

#include "play.decl.h"

class start : public CBase_start {
public:
    start(CkArgMsg* m) {
        long double k = 3456.344134;
        ckout << "k = " << k << endl;
    }
};

#include "play.def.h"

Compilation error :

play.cc:9:25: error: ambiguous overload for ‘operator<<’ (operand types are ‘CkOutStream’ and ‘long double’)
    9 |         ckout << "k = " << k << endl;
      |         ~~~~~~~~~~~~~~~ ^~ ~
      |               |            |
      |               CkOutStream  long double