Re: ACPICA compilation error on x86_64_defconfig (W=1 build)

[Andy Shevchenko <andriy.shevchenko@intel.com>]

On Mon, Apr 07, 2025 at 08:49:41PM +0200, Rafael J. Wysocki wrote:
> On Mon, Apr 7, 2025 at 8:47 PM Andy Shevchenko
> <andriy.shevchenko@intel.com> wrote:
> >
> > v6.15-rc1 (but seems older should also be problematic) fails to compile by
> > Clang 19 with `make W=1`.
> >
> >   CC      drivers/acpi/acpica/nsaccess.o
> >   drivers/acpi/acpica/nsaccess.c:295:6: error: variable 'num_carats' set but not used [-Werror,-Wunused-but-set-variable]
> >     295 |         u32 num_carats;
> >         |             ^
> >   1 error generated.
> >
> > I looked briefly in the code and I have no idea how to fix this, as probably
> > __maybe_unused not an option for ACPICA. Hence this report.
> >
> > Note, the in-tree defconfig is in use:
> >
> >         git checkout v6.15-rc1
> >         make x86_64_defconfig

> >         make W=1

Since it's a clang, this should have also something like LLVM=1.

> > should trigger it.

-- 
With Best Regards,
Andy Shevchenko