> Lazarus for old stable fpc 1.1 have some more non-fatal bugs (I have fixed
> them in 2 min). There are: TRtlCriticalSection is not in standard unit,
> but in
> somewhat like SysThrds.
The SysThrds unit is an internal unit that will be included by the
compiler when using {$THREADING ON}
Without the {$THREADING ON} switch the threadvar keyword is also not
available.