80-bit (long double) support?

[cdunn2001]

When I compile with C++ instead of C backend: 
    
    
    /usercode/nimcache/@min.nim.cpp: In function 'void 
coloneq___7zlIf7POTZHxgRJdjlbnawin(long double&, NF)':
    /usercode/nimcache/@min.nim.cpp:103:3: error: invalid type argument of 
unary '*' (have 'long double')
      *a=b;
       ^
    
    
    Run

Why?