Merge #653

653: Allow custom `link_section` attributes for late resources r=AfoHT a=vccggorski

This commit makes RTIC aware of user-provided `link_section` attributes,
letting user override default section mapping.

Co-authored-by: Gabriel Górski <gabriel.gorski@volvocars.com>

CHANGELOG.md

@@ -9,6 +9,8 @@ For each category, *Added*, *Changed*, *Fixed* add new entries at the top!
 
 ### Added
 
+- Allow custom `link_section` attributes for late resources
+
 ### Fixed
 
 ### Changed

macros/src/codegen/local_resources.rs

@@ -27,8 +27,14 @@ pub fn codegen(
         let mangled_name = util::static_local_resource_ident(name);
 
         let attrs = &res.attrs;
+
         // late resources in `util::link_section_uninit`
-        let section = util::link_section_uninit();
+        // unless user specifies custom link section
+        let section = if attrs.iter().any(|attr| attr.path.is_ident("link_section")) {
+            None
+        } else {
+            Some(util::link_section_uninit())
+        };
 
         // For future use
         // let doc = format!(" RTIC internal: {}:{}", file!(), line!());

macros/src/codegen/shared_resources.rs

@@ -23,10 +23,16 @@ pub fn codegen(
         let ty = &res.ty;
         let mangled_name = &util::static_shared_resource_ident(name);
 
-        // late resources in `util::link_section_uninit`
-        let section = util::link_section_uninit();
         let attrs = &res.attrs;
 
+        // late resources in `util::link_section_uninit`
+        // unless user specifies custom link section
+        let section = if attrs.iter().any(|attr| attr.path.is_ident("link_section")) {
+            None
+        } else {
+            Some(util::link_section_uninit())
+        };
+
         // For future use
         // let doc = format!(" RTIC internal: {}:{}", file!(), line!());
         mod_app.push(quote!(