echo static const char* OVR_FORCE_REBUILD_PRE = __TIMESTAMP__; /* DO NOT SOURCE CONTROL THIS FILE */ > "$(ProjectDir)OVR_ForceRebuildNoCheckin.h" Force a rebuild. Please do not check in the ForceRebuildNoCheckin.h file. echo static const char* OVR_FORCE_REBUILD_POST = __TIMESTAMP__; /* DO NOT SOURCE CONTROL THIS FILE */ > "$(ProjectDir)OVR_ForceRebuildNoCheckin.h" Force a rebuild. Please do not check in the ForceRebuildNoCheckin.h file. "$(ProjectDir)OVR_ForceRebuildNoCheckin.h"