write_rel: Skip setting reloc/imp offset with empty relocations

src/util/rel.rs

@@ -932,6 +932,7 @@ where
     let imp_count = relocations.iter().map(|r| r.module_id).dedup().count();
     let mut imp_entries = Vec::<RelImport>::with_capacity(imp_count);
     let mut raw_relocations = vec![];
+    if !relocations.is_empty() {
         if info.version < 3 {
             // Version 1 and 2 RELs write relocations before the import table.
             header.rel_offset = offset;
@@ -958,6 +959,7 @@ where
                 &mut offset,
             )?;
         }
+    }
 
     for symbol in file.symbols().filter(|s| s.is_definition()) {
         let Some(symbol_section) = symbol.section_index() else {
@@ -1035,6 +1037,7 @@ where
         }
         w.write_all(&section_data)?;
     }
+    if !relocations.is_empty() {
         if info.version < 3 {
             // Version 1 and 2 RELs write relocations before the import table.
             ensure!(w.stream_position()? as u32 == header.rel_offset);
@@ -1053,6 +1056,7 @@ where
                 reloc.to_writer(w, Endian::Big)?;
             }
         }
+    }
     ensure!(w.stream_position()? as u32 == offset);
     Ok(())
 }