On Wed, Jul 17, 2024, at 12:54, Arnd Bergmann wrote:
> 
> -$(obj)/syscall_table_%.h: $(syscalltbl) $(systbl) FORCE
> +$(obj)/syscall_table_%.h: $(syscalltbl) $(systbl)
>         $(call if_changed,systbl)
> 
>  # Create output directory. Skip it if at least one old header exists
>
> Masahiro, does that make sense to you? I assume you can
> explain this properly, but I'll already send a patch with
> this version.

This was not quite right either, but I sent a patch now
that works with both old and new versions of make and
has appears to have the intended behavior for incremental
builds with or without changes to syscall.tbl:

https://lore.kernel.org/lkml/20240717124253.2275084-1-a...@kernel.org/T/

    Arnd

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