[PATCH v4 5/6] gpu: drm: nova: build after nova-core and use its symbols

[Alexandre Courbot]

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 <acourbot@xxxxxxxxxx>
---
 drivers/gpu/Makefile | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/Makefile b/drivers/gpu/Makefile
index 164e704bc741..a996047be69a 100644
--- a/drivers/gpu/Makefile
+++ b/drivers/gpu/Makefile
@@ -38,3 +38,7 @@ CFLAGS_nova-core/nova_core_exports.o := -I $(objtree)/$(obj)/nova-core
 # 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