[fpc-devel] AVR target on trunk does not compile for me

[Florian Klämpfl]

Am 03.06.2019 um 12:00 schrieb Michael Ring:
> I set CROSSOPT to empty, after this change avr6 builds. BUT:
> 
> What made me wonder was that avr5 builds fine, it should be affected by the same SOFTFPU issue.
> 
> I did a quick grep through the fpc sources and found no obviously missing defines for avr6.
> 
> However, a grep for avr revealed this code snippet in rtl/embedded/system.cfg:
> 
> # AVR6 has normally more memory, so enable more functions
> #ifdef CPUAVR6
> -SfANSISTRINGS
> -SfWIDESTRINGS
> -SfDYNARRAYS
> -SfTHREADING
> -SfVARIANTS
> -SfOBJECTS
> -SfCOMMANDARGS
> -SfRANDOM
> -SfRESOURCES
> #endif
> 
> 
> The build works find with -g when I remove -SfVARIANTS
> 
> I am also wondering if CPUAVR is set when CPUAVR6 is set (I guess so), 

Yes.

> if this is true then -SfOBJECTS can also be
> removed from the CPUAVR6 Define as it is already in the CPUAVR define

This is true indeed.

> 
> Last question: Is avr6 the only subarch that has enough memory for enabling strings? I am a Noob when it comes to avr,
> but I guess there should be more subarchs that have more memory, I today saw some ATTINY Chips with 32kB of Flash....

It depends on the particular controller type and it is a rough estimation when it should be enabled. In practice, one
should recompile the rtl with the needed settings.