Re: [PATCH RFC 0/5] kbuild: uapi: also test UAPI headers against C++ compilers

[Nathan Chancellor <nathan@kernel.org>]

On Sun, Mar 08, 2026 at 10:24:00PM +0100, Thomas Weißschuh wrote:
> C++ language requirements differ from those of C.
> 
> Also test the headers against C++ compilers to make sure no errors
> creep in accidentally.
> 
> There was a previous attempt by David Howells[0], but today with the
> existing UAPI testing infrastructure the implementation is a bit nicer.
> This series does not derive from David's, as I found it only after
> writing my patches.
> 
> [0] https://lore.kernel.org/lkml/nycvar.YFH.7.76.1809052120510.24932@n3.vanv.qr/
> 
> This depends on my other series "kbuild: uapi: remove usage of toolchain
> headers", which is currently in kbuild-next-unstable.
> 
> Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
> ---
> Thomas Weißschuh (5):
>       kbuild: uapi: move some compiler arguments out of the command definition
>       kbuild: uapi: move all include path flags together
>       kbuild: uapi: handle UML in architecture-specific exclusion lists
>       kbuild: uapi: provide a C++ compatible dummy definition of NULL
>       kbuild: uapi: also test UAPI headers against C++ compilers

Aside from my comment on patch 5, this seems reasonable to me.

Reviewed-by: Nathan Chancellor <nathan@kernel.org>

Cheers,
Nathan