[PATCH v5 4/5] gpu: drm: nova: depend on nova-core and use its symbols

Make nova-core a build dependency of nova-drm, so its crate metadata is
available and up-to-date when the latter is built.

This is intended to be a workaround until the build system supports Rust
cross-crate dependencies natively.

Signed-off-by: Alexandre Courbot <[email protected]>
---
 drivers/gpu/Makefile | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/Makefile b/drivers/gpu/Makefile
index 13c96aa57033..e372fc02139f 100644
--- a/drivers/gpu/Makefile
+++ b/drivers/gpu/Makefile
@@ -60,3 +60,7 @@ endif
 # Output nova-core's crate metadata for use by nova-drm at compile time.
 RUSTFLAGS_nova-core/nova_core.o += \
 	--emit=metadata=$(objtree)/$(obj)/nova-core/libnova_core.rmeta
+
+# Allow nova-drm to import nova-core's types.
+$(obj)/drm/nova/nova.o: $(obj)/nova-core/nova_core.o
+RUSTFLAGS_drm/nova/nova.o := -L $(objtree)/$(obj)/nova-core --extern nova_core

-- 
2.54.0