[fpc-devel] about {$OPTIMIZATION xxx} // Re: error in docs ?

[Martin Frb]

On 06/02/2014 17:48, Martin Frb wrote:
> http://www.freepascal.org/docs-html/prog/progsu58.html#x64-630001.1.58
>
>> Example:
>>
>> {$OPTIMIZATION ON}
>>
>> is equivalent to
>>
>> {$OPTIMIZATION 2}
>
> "2" is not in the list of supported keywords.
>
> And at least {$OPTIMIZATION 1} gives an compile error
>

{$OPTIMIZATION 2}  gives an error
but

{$OPTIMIZATION -usemachspeed}
Note the "-", fpc accepts everithing, if there is a dash, why.

Also, it appears one can only enable options, Or go down to a lower 
level? But not selectively switch an opt off?