How to specify a precompiled header to the output of CMake (2.8.12.1) AUTOMOC ?

So far, in the CMakeLists.txt I've tried these two separately:

```
 set(AUTOMOC_MOC_OPTIONS "-bstdafx.h")
 set(AUTOMOC_MOC_OPTIONS "-fstdafx.h")

```

The generated AUTOMOC output when building the project (project\_automoc.cpp) only contains the moc\_xxx.cpp files:

```
/* This file is autogenerated, do not edit*/
/// <- stdafx.h should be here ?!?!
#include "moc_widget_fps.cpp"
#include "moc_widget_sysevents.cpp"

```