Joel Winarske 8417e3a0e8 docs(cross): document + demonstrate app-layer extends ...

Add a README subsection ("Layered manifests: extends, board → project → app")
covering both extends forms (<board> and <dir>#<target>) and the merge rules,
with project and app manifest snippets.

Add examples/cross/app-extends.emb.yaml: an app target that extends the rpi
family file's rpi5-bookworm target (which extends the board) and overlays an
app-specific dev package — a real three-layer chain. A cross_command test
--dry-runs it so it stays valid.

Signed-off-by: Joel Winarske <joel.winarske@gmail.com>

2026-06-20 07:13:21 -07:00

..

cross

docs(cross): document + demonstrate app-layer extends

2026-06-20 07:13:21 -07:00