tools: Export NUTTX_INCLUDE_DIR for Rust builds

Set NUTTX_INCLUDE_DIR in the Rust build commands to include the necessary directories for proper compilation.
* Ensured correct include paths for Rust projects
* Improved build reliability for Rust components

Signed-off-by: Huang Qi <[email protected]>

Author: no1wudi

Diff for: cmake/nuttx_add_rust.cmake

@@ -150,6 +150,8 @@ function(nuttx_add_rust)
   add_custom_command(
     OUTPUT ${RUST_LIB_PATH}
     COMMAND
+      ${CMAKE_COMMAND} -E env
+      NUTTX_INCLUDE_DIR=${PROJECT_SOURCE_DIR}/include:${CMAKE_BINARY_DIR}/include:${CMAKE_BINARY_DIR}/include/arch
       cargo build --${RUST_PROFILE} -Zbuild-std=std,panic_abort
       ${RUST_DEBUG_FLAGS} --manifest-path ${CRATE_PATH}/Cargo.toml --target
       ${RUST_TARGET} --target-dir ${RUST_BUILD_DIR}

Diff for: tools/Rust.mk

@@ -89,15 +89,17 @@ endef
 
 ifeq ($(CONFIG_DEBUG_FULLOPT),y)
 define RUST_CARGO_BUILD
-	cargo build --release -Zbuild-std=std,panic_abort \
+	NUTTX_INCLUDE_DIR=$(TOPDIR)/include:$(TOPDIR)/include/arch \
+    cargo build --release -Zbuild-std=std,panic_abort \
     -Zbuild-std-features=panic_immediate_abort \
 		--manifest-path $(2)/$(1)/Cargo.toml \
 		--target $(call RUST_TARGET_TRIPLE)
 endef
 else
 define RUST_CARGO_BUILD
 	@echo "Building Rust code with cargo..."
-	cargo build -Zbuild-std=std,panic_abort \
+	NUTTX_INCLUDE_DIR=$(TOPDIR)/include:$(TOPDIR)/include/arch \
+    cargo build -Zbuild-std=std,panic_abort \
 		--manifest-path $(2)/$(1)/Cargo.toml \
 		--target $(call RUST_TARGET_TRIPLE)
 endef