[rust][tools] Fix Rust build example configuration handling

Improve the Rust build integration across core, applications, components, and module examples. Fix build failure propagation, target and feature handling, linker flags, example configuration semantics, and add STM32 CI attach coverage.

6 files changed, 16 insertions, 8 deletions

diff --git a/components/rust/core/src/api/mod.rs b/components/rust/core/src/api/mod.rs
index 8fc2ba2301..cf3d0bbc0c 100644
--- a/components/rust/core/src/api/mod.rs
+++ b/components/rust/core/src/api/mod.rs
@@ -14,6 +14,7 @@ pub mod thread;
 pub mod mutex;
 pub mod sem;
 pub mod queue;
+#[cfg(feature = "libdl")]
 pub mod libloading;
 
 
@@ -24,4 +25,5 @@ pub use thread::*;
 pub use mutex::*;
 pub use sem::*;
 pub use queue::*;
+#[cfg(feature = "libdl")]
 pub use libloading::*;
diff --git a/components/rust/core/src/api/queue.rs b/components/rust/core/src/api/queue.rs
index 96665e47f2..8a77374b90 100644
--- a/components/rust/core/src/api/queue.rs
+++ b/components/rust/core/src/api/queue.rs
@@ -20,7 +20,7 @@ pub type APIRawQueue = rt_mq_t;
 pub(crate) fn queue_create(name: &str, len: u64, message_size: u64) -> Option<APIRawQueue> {
     let s = CString::new(name).unwrap();
     let raw;
-    unsafe { raw = rt_mq_create(s.as_ptr(), message_size, len, 0) }
+    unsafe { raw = rt_mq_create(s.as_ptr(), message_size as rt_size_t, len as rt_size_t, 0) }
     if raw == ptr::null_mut() {
         None
     } else {
@@ -35,7 +35,7 @@ pub(crate) fn queue_send_wait(
     msg_size: u64,
     tick: i32,
 ) -> RttCResult {
-    unsafe { rt_mq_send_wait(handle, msg, msg_size, tick).into() }
+    unsafe { rt_mq_send_wait(handle, msg, msg_size as rt_size_t, tick).into() }
 }
 
 #[inline]
@@ -45,7 +45,12 @@ pub(crate) fn queue_receive_wait(
     msg_size: u64,
     tick: i32,
 ) -> RttCResult {
-    unsafe { rt_mq_recv(handle, msg, msg_size, tick).into() }
+    let ret = unsafe { rt_mq_recv(handle, msg, msg_size as rt_size_t, tick) };
+    if ret >= 0 {
+        RttCResult::Ok
+    } else {
+        ret.into()
+    }
 }
 
 #[inline]
diff --git a/components/rust/core/src/bindings/librt.rs b/components/rust/core/src/bindings/librt.rs
index 3f16c014fd..a39ed07c22 100644
--- a/components/rust/core/src/bindings/librt.rs
+++ b/components/rust/core/src/bindings/librt.rs
@@ -26,6 +26,7 @@ pub type rt_int32_t = c_int;
 pub type rt_uint8_t  = c_uchar;
 pub type rt_tick_t = rt_uint32_t;
 pub type rt_size_t = rt_ubase_t;
+pub type rt_ssize_t = rt_base_t;
 
 pub type rt_thread_t = *mut c_void;
 pub type rt_sem_t = *mut c_void;
@@ -94,7 +95,7 @@ unsafe extern "C" {
     pub fn rt_mq_create(name: *const c_char, msg_size: rt_size_t, max_msgs: rt_size_t, flag: rt_uint8_t) -> rt_mq_t;
     pub fn rt_mq_send(mq: rt_mq_t, buffer: *const c_void, size: rt_size_t) -> rt_err_t;
     pub fn rt_mq_send_wait(mq: rt_mq_t, buffer: *const c_void, size: rt_size_t, timeout: rt_int32_t) -> rt_err_t;
-    pub fn rt_mq_recv(mq: rt_mq_t, buffer: *mut c_void, size: rt_size_t, timeout: rt_int32_t) -> rt_base_t;
+    pub fn rt_mq_recv(mq: rt_mq_t, buffer: *mut c_void, size: rt_size_t, timeout: rt_int32_t) -> rt_ssize_t;
     pub fn rt_mq_delete(mq: rt_mq_t) -> rt_err_t;
     pub fn rt_mq_detach(mq: rt_mq_t) -> rt_err_t;
 }
diff --git a/components/rust/core/src/bindings/mod.rs b/components/rust/core/src/bindings/mod.rs
index ae2610e9c8..cad651a1dd 100644
--- a/components/rust/core/src/bindings/mod.rs
+++ b/components/rust/core/src/bindings/mod.rs
@@ -46,8 +46,7 @@ pub use librt::{
 
 /* Memory management functions */
 pub use librt::{
-    rt_malloc, rt_free, rt_realloc, rt_calloc, rt_malloc_align, rt_free_align,
-    rt_safe_malloc, rt_safe_free
+    rt_malloc, rt_free, rt_realloc, rt_calloc, rt_malloc_align, rt_free_align
 };
 
 /* Device management functions */
diff --git a/components/rust/core/src/fs.rs b/components/rust/core/src/fs.rs
index 6ad02037ab..9a8d1afa8d 100644
--- a/components/rust/core/src/fs.rs
+++ b/components/rust/core/src/fs.rs
@@ -98,7 +98,7 @@ impl File {
 
     pub fn seek(&self, offset: i64) -> RTResult<i64> {
         let n = unsafe { libc::lseek(self.fd, offset as libc::off_t, libc::SEEK_SET) };
-        if n < 0 { Err(FileSeekErr) } else { Ok(n) }
+        if n < 0 { Err(FileSeekErr) } else { Ok(n.into()) }
     }
 
     pub fn flush(&self) -> RTResult<()> {
diff --git a/components/rust/core/src/lib.rs b/components/rust/core/src/lib.rs
index 01e4b34102..0b94f81427 100644
--- a/components/rust/core/src/lib.rs
+++ b/components/rust/core/src/lib.rs
@@ -17,7 +17,6 @@ and device interfaces. Designed for embedded devices running RT-Thread.
 */
 
 #![no_std]
-#![feature(alloc_error_handler)]
 #![feature(linkage)]
 #![allow(dead_code)]
 
@@ -33,6 +32,7 @@ pub mod init;
 pub mod allocator;
 pub mod mutex;
 pub mod out;
+#[cfg(feature = "fs")]
 pub mod fs;
 pub mod panic;
 pub mod param;
@@ -40,6 +40,7 @@ pub mod queue;
 pub mod sem;
 pub mod thread;
 pub mod time;
+#[cfg(feature = "libdl")]
 pub mod libloader;
 
 mod prelude;