Re: [avr-gcc-list] Space optimisation for PSTR()

[E. Weddington]

Bernard Fouche wrote:

> Hi there.
>
> It seems that if I use twice the same string in the program thru PSTR(), the
> string will be stored twice?
>
> For instance:
>
> fputs_P("blabla",OutStream);
>
> then later in the code:
>
> fputs_P("blabla",OutStream);
>
>  

That probably should be:
fputs_P(PSTR("blabla", OutStream);
Right?

> "blabla" will be stocked twice in the flash memory. (I'm looking at the .lss
> file).
> I am right? 
Yes.

> If so will such a space optimisation be done in the near future
>  
Doubtful.

> or should I manage my strings myself? (by passing the address of a string if
> I re-use it instead of relying on PSTR())
>  
Yes.

It's fairly straightforward to set up a header file that contains all 
your defined strings with identifiers, then use the identifiers 
everywhere in your code.

HTH
Eric