Re: avr-gcc-12.1.0-x64-windows new warnings ?

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On Mon, Apr 24, 2023 at 2:28=E2=80=AFAM Royce Pereira <[email protected]> w=
rote:

> Hi,
>
> I just tried avr-gcc 12.1.0 on an old project, and got some new warning I
> can't explain.
>
> The code is:
>
> PORTC &=3D 0xFE ;  //clear bit 0.
>
> and the warning is:
> warning: array subscript 0 is outside array bounds of 'volatile
> uint8_t[0]' {aka 'volatile unsigned char[]'} [-Warray-bounds]
>
> What is this warning and what array is it referring to?
>
Presumably from the macro expansion of PORTC?
Can you paste the full command line? Also, can you add -E to the command
line and share the output?

Regards
Senthil

>
> Thank you!
>
> --
> Best Regards,
>
> -- Royce Pereira
>

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<div dir=3D"ltr"><div dir=3D"ltr"><br></div><br><div class=3D"gmail_quote">=
<div dir=3D"ltr" class=3D"gmail_attr">On Mon, Apr 24, 2023 at 2:28=E2=80=AF=
AM Royce Pereira &lt;<a href=3D"mailto:[email protected]">[email protected]=
</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:=
0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">=
<div dir=3D"ltr">Hi,<div><br></div><div>I just tried avr-gcc 12.1.0 on an o=
ld project, and got some new warning I can&#39;t explain.</div><div><br></d=
iv><div>The code is:</div><div><br></div><div>PORTC &amp;=3D 0xFE ;=C2=A0 /=
/clear bit 0.<br></div><div><br></div><div>and the warning is:</div><div>wa=
rning: array subscript 0 is outside array bounds of &#39;volatile uint8_t[0=
]&#39; {aka &#39;volatile unsigned char[]&#39;} [-Warray-bounds]<br></div><=
div><br></div><div>What is this warning and what array is it referring=C2=
=A0to?</div></div></blockquote><div>Presumably from the macro expansion of =
PORTC?</div><div>Can you paste the full command line? Also, can you add -E =
to the command line and share the output?</div><div><br></div><div>Regards<=
/div><div>Senthil <br></div><blockquote class=3D"gmail_quote" style=3D"marg=
in:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1e=
x"><div dir=3D"ltr"><div><br></div><div>Thank you!</div><div><br></div><spa=
n>-- </span><br><div dir=3D"ltr"><div dir=3D"ltr">Best Regards,<div><br></d=
iv><div>-- Royce Pereira</div></div></div></div>
</blockquote></div></div>

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