Re: [PATCH 0/2] kbuild: enable CONFIG_WERROR for more build steps

[Miguel Ojeda]

On Tue, Aug 12, 2025 at 12:25 PM Thomas Weißschuh
<thomas.weissschuh@xxxxxxxxxxxxx> wrote:
>
> The users will still pass -Werror explicitly, we can't filter that out.

You mean the user passing them when calling `make`, right? I guess we
could perhaps try to be smart there, but yeah, it gets annoying.

Another option could be to have a new `NOCONFIGCC` that gets used only
for Kconfig and that defaults to `HOSTCC`.

> Let's skip hostprogs for now.

Sounds good, thanks!

> Another possibility would be to use -Werror
> for hostprogs unconditionally. Various tools/ are doing that for example.

Not sure what Kbuild thinks about that -- we have a small risk of
breaking things with newer compilers, but that may be not too bad for
just hostprogs (unlike when it was attempted to make it default `y`).

(For Rust, the rate of new releases is very high compared to GCC or
LLVM, but on the other hand it is easy to test them in advance, and
what I have done so far for other things is just clean them as they
appear -- so that should be fine, but it does make it way more urgent
if they are errors every time, though, since it blocks other testing
too).

Cheers,
Miguel