Re: [PATCH v2] kbuild: make all file references relative to source root

[Masahiro Yamada]

On Sat, Mar 15, 2025 at 10:20 PM Thomas Weißschuh <linux@xxxxxxxxxxxxxx> wrote:
>
> -fmacro-prefix-map only affects __FILE__ and __BASE_FILE__.
> Other references, for example in debug information, are not affected.
> This makes handling of file references in the compiler outputs harder to
> use and creates problems for reproducible builds.
>
> Switch to -ffile-prefix map which affects all references.
>
> Also drop the documentation section advising manual specification of
> -fdebug-prefix-map for reproducible builds, as it is not necessary
> anymore.
>
> Suggested-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
> Link: https://lore.kernel.org/lkml/c49cc967294f9a3a4a34f69b6a8727a6d3959ed8.camel@xxxxxxxxxxxxxxx/
> Acked-by: Borislav Petkov (AMD) <bp@xxxxxxxxx> # arch/x86/
> Signed-off-by: Thomas Weißschuh <linux@xxxxxxxxxxxxxx>
> ---
> Changes in v2:
> - Pick up Ack from Borislav
> - Merge all changes into single patch
> - Also drop link to KCFLAGS from docs
> - Link to v1: https://lore.kernel.org/r/20250313-kbuild-prefix-map-v1-0-38cea8448c5f@xxxxxxxxxxxxxx
> ---

Applied to linux-kbuild. Thanks.


--
Best Regards
Masahiro Yamada