diff mbox series

[RFC,1/5] kernel.bbclass: Export artifacts needed for out-of-tree Rust compilation

Message ID 20251119195540.2671856-2-yoann.congal@smile.fr
State New
Headers show
Series Kernel Rust out-of-tree module support | expand

Commit Message

Yoann Congal Nov. 19, 2025, 7:55 p.m. UTC 
From: Yoann Congal <yoann.congal@smile.fr>

Publish artifacts from kernel compilation to allow out-of-tree Rust
compilation:
* scripts/target.json: target definition: architecture, ABI, compiler
  options, ...
* rust/: the crates compiled by the kernel available to
  out-of-tree-modules

Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
---
 meta/classes-recipe/kernel.bbclass | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
diff mbox series

Patch

diff --git a/meta/classes-recipe/kernel.bbclass b/meta/classes-recipe/kernel.bbclass
index 003a155e794..a9a25b9819a 100644
--- a/meta/classes-recipe/kernel.bbclass
+++ b/meta/classes-recipe/kernel.bbclass
@@ -631,6 +631,24 @@  do_shared_workdir () {
 		cp -r scripts/gcc-plugins ${kerneldir}/scripts
 	fi
 
+    if ${@bb.utils.contains("DISTRO_FEATURES", "rust-kernel", "true", "false", d)}; then
+        # Copy target.json file needed for out-of-tree rust modules
+        if [ -e scripts/target.json ]; then
+            bbnote "Copying scripts/target.json"
+            mkdir -p ${kerneldir}/scripts
+            cp scripts/target.json ${kerneldir}/scripts
+        else
+            bbwarn "scripts/target.json not found in compiled kernel. Out-of-tree rust modules will fail to build."
+        fi
+
+        # Copy rust/ needed by out-of-tree module (firstly for the core rust crate)
+        if [ -e rust/ ]; then
+            bbnote "Copying rust/"
+            cp -r rust ${kerneldir}/
+        else
+            bbwarn "rust/ not found in compiled kernel. Out-of-tree rust modules will fail to build."
+        fi
+    fi
 }
 
 # We don't need to stage anything, not the modules/firmware since those would clash with linux-firmware