Bring in Rust support through the external module

.gitignore

@@ -59,6 +59,17 @@ venv
 .clangd
 new.info
 
+# Cargo drops lock files in projects to capture resolved dependencies.
+# We don't want to record these.
+Cargo.lock
+
+# Cargo encourages a .cargo/config.toml file to symlink to a generated file.  Don't save these.
+.cargo/
+
+# Normal west builds will place the Rust target directory under the build directory.  However,
+# sometimes IDEs and such will litter these target directories as well.
+target/
+
 # CI output
 compliance.xml
 _error.types

MAINTAINERS.yml

@@ -4831,6 +4831,14 @@ West:
   labels:
     - "platform: Intel"
 
+"West project: zephyr-lang-rust":
+  status: maintained
+  maintainers:
+    - d3zd3z
+  files: []
+  labels:
+    - "area: Rust"
+
 "West project: libmetal":
   status: odd fixes
   collaborators:

include/zephyr/arch/arm/cortex_m/scripts/linker.ld

@@ -174,7 +174,7 @@ SECTIONS
 
 	__text_region_end = .;
 
-#if defined (CONFIG_CPP)
+#if defined (CONFIG_CPP) || defined(CONFIG_RUST)
 	SECTION_PROLOGUE(.ARM.extab,,)
 	{
 	/*

submanifests/optional.yaml

@@ -33,6 +33,12 @@ manifest:
       remote: upstream
       groups:
         - optional
+    - name: zephyr-lang-rust
+      revision: d2734f48d3ab1dbf584a936b2a05ece7bf0904f5
+      path: modules/lang/rust
+      remote: upstream
+      groups:
+        - optional
     - name: sof
       revision: 0e4c4efcaae858036027607e88406d59bd2a31d8
       path: modules/audio/sof