Re: [PATCH 20/23] kbuild: support -fmacro-prefix-map for external modules

[Nicolas Schier]

On Tue, Sep 17, 2024 at 11:16:48PM +0900, Masahiro Yamada wrote:
> This commit makes -fmacro-prefix-map work for external modules built in
> a separate output directory. It improves the reproducibility of external
> modules and provides the benefits described in commit a73619a845d5
> ("kbuild: use -fmacro-prefix-map to make __FILE__ a relative path").
> 
> When VPATH is not defined (e.g., when the kernel or external module is
> built in the source directory), this option is unnecessary.
> 
> Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
> ---
> 
>  Makefile | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)

Reviewed-by: Nicolas Schier <nicolas@xxxxxxxxx>