Re: [RFC PATCH 10/12] pc-bios/optionrom: compile with -Wno-array-bounds

[Paolo Bonzini]

On 5/2/22 09:37, Michael Tokarev wrote:
> > pvh_main.c: In function ‘pvh_load_kernel’:
> > pvh_main.c:101:42: warning: array subscript 0 is outside array bounds 
> > of ‘uint16_t[0]’ {aka ‘short unsigned int[]’} [-Warray-bounds]
> >    101 |         uint32_t ebda_paddr = ((uint32_t)*((uint16_t 
> > *)EBDA_BASE_ADDR)) << 4;
> >        |                                          
> > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> To me it looks like we should try to fix this particular expression
> to make it more "compiler-friendly" than to disable warning for the
> whole thing.

I think this is really a compiler bug, or alternatively this case should 
be extracted to its own -W flag.

> Which compiler (version) does this?

The GCC 12.0.1 prerelease.

Paolo