Fix lcf generation for empty RELs

Also, handle alignment of 0 in rel make

src/util/lcf.rs

@@ -64,7 +64,7 @@ pub fn generate_ldscript_partial(
     template: Option<&str>,
     force_active: &[String],
 ) -> Result<String> {
-    let section_defs = obj
+    let mut section_defs = obj
         .sections
         .iter()
         .map(|(_, s)| {
@@ -73,6 +73,12 @@ pub fn generate_ldscript_partial(
         })
         .join("\n        ");
 
+    // Some RELs have no entry point (`.text` was stripped) so mwld requires at least an empty
+    // `.init` section to be present in the linker script, for some reason.
+    if obj.entry.is_none() {
+        section_defs = format!(".init :{{}}\n        {}", section_defs);
+    }
+
     let mut force_files = Vec::with_capacity(obj.link_order.len());
     for unit in &obj.link_order {
         let obj_path = obj_path_for_unit(&unit.name);

src/util/rel.rs

@@ -774,6 +774,7 @@ where
             .and_then(|v| v.get(permitted_section_idx))
             .cloned()
             .unwrap_or(section.align() as u32)
+            .max(1)
     }
 
     let mut align = file