\begin{code}
#include "rtsdefs.h"

void
PreTraceHook (StgInt fd)
{
/* By default, a trace msg doesn't have a header (nor a footer) */
#if 0
    const char msg[]="Trace On:\n";
    write(fd,msg,sizeof(msg)-1);
#endif
}

void
PostTraceHook (StgInt fd)
{
#if 0
    const char msg[]="\nTrace Off.\n";
    write(fd,msg,sizeof(msg)-1);
#endif
}
\end{code}