Build failure due to format-truncation

[Martin Sebor]

On 6/16/21 6:26 PM, José Rui Faustino de Sousa wrote:
> On 16/06/21 20:37, Martin Sebor wrote:
>> I don't really think the warning is doing
>> anything wrong
>>
> 
> I completely agree. I am not complaining about the warning, I am 
> complaining that there is code in gcc which raises this warning and 
> breaks the build.
> 
> I was assuming that this was being triggered by some option that I was 
> using but, on further investigation, the -Wformat-truncation flag is 
> being set by -Wall which AFAICT is set by the build process itself...

Correct.

> 
> So this is starting to look like something that really should be 
> fixed... What bugs me is why it seems that I was the only one who 
> noticed...

What stage does this happens in, and if stage 1, what is the system 
compiler?  You need GCC 12 to reproduce it and as far as I can see
it needs -O0 (or -Og or -Os).  That seems like a unique setup.  If
this is stage 1 it doesn't use -Werror so warnings shouldn't keep
the build from succeeding.  If some later stage and you're using
any unusual options (like -Og or -Os) then that would also be
unusual.  Otherwise I'll need more info to understand what's going
on.

Martin

> 
> Thank you very much.
> 
> Best regards,
> José Rui
> 
>