[PATCH] kbuild: Use relative paths in generated .incbin directives

[Tom Rini]

On Wed, Mar 25, 2026 at 07:08:09AM -0600, Simon Glass wrote:
> The generated .S files for fonts, splash screens and EFI apps use
> .incbin with the full prerequisite path. When building with O= this
> bakes an absolute path into the .S file. If the build directory is
> later used on a different machine (e.g. in a container), the assembler
> cannot find the source file.
> 
> Use $(src)/$(notdir $<) instead of $< so the .incbin directive contains
> a source-relative path like drivers/video/fonts/nimbus_sans_l_regular.ttf
> rather than an absolute one. Add -Wa,-I$(srctree) to the assembler
> flags so the assembler can resolve these paths.
> 
> The DTB and DTBO rules are left unchanged since their prerequisites are
> generated files in the build directory.
> 
> Signed-off-by: Simon Glass <sjg at chromium.org>
> ---
> 
>  scripts/Makefile.lib | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)

This is generic kbuild infrastructure now. Is there a fix we're missing
from upstream, a change we haven't pulled in yet (as we need to keep
syncing upwards) or a problem upstream too? Thanks!

-- 
Tom
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