Elaborate on fixme

Author: bjorn3

compiler/rustc_codegen_ssa/src/back/linker.rs

@@ -1793,7 +1793,15 @@ pub(crate) fn exported_symbols(
     if let Some(ref exports) = tcx.sess.target.override_export_symbols {
         return exports
             .iter()
-            .map(|sym| (sym.to_string(), SymbolExportKind::Text /* FIXME */))
+            .map(|sym| {
+                (
+                    sym.to_string(),
+                    // FIXME use the correct export kind for this symbol. override_export_symbols
+                    // can't directly specify the SymbolExportKind as it is defined in rustc_middle
+                    // which rustc_target can't depend on.
+                    SymbolExportKind::Text,
+                )
+            })
             .collect();
     }