[Lazarus] exception handling

[Andrea Mauri]

Il 09/03/2011 12:49, Hans-Peter Diettrich ha scritto:
> I'd check this just before the operation, then you won't get an
> exception at all. You can wrap that in a MyLn function, if you need ln()
> more often.
ok. I know. but my question is more general and it is:

The gui app handles this operation giving as result b = NaN or Inf and 
it does not raise any exception while the concole app raise an 
exception: External SIGFPE.

How can I obtain the same behaviour on my app both on GUI and console? 
Which options I have to check?