1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/fortran/gfortran.h b/gcc/fortran/gfortran.h
index d6176db..18bbf79 100644
--- a/gcc/fortran/gfortran.h
+++ b/gcc/fortran/gfortran.h
@@ -1281,6 +1281,7 @@ struct gfc_undo_change_set
 {
   vec<gfc_symbol *> syms;
   vec<gfc_typebound_proc *> tbps;
+  gfc_undo_change_set *previous;
 };
 
 
@@ -2641,6 +2642,9 @@ int gfc_get_sym_tree (const char *, gfc_namespace *, gfc_symtree **, bool);
 int gfc_get_ha_symbol (const char *, gfc_symbol **);
 int gfc_get_ha_sym_tree (const char *, gfc_symtree **);
 
+void gfc_new_undo_checkpoint (gfc_undo_change_set &);
+void gfc_drop_last_undo_checkpoint (void);
+void gfc_restore_last_undo_checkpoint (void);
 void gfc_undo_symbols (void);
 void gfc_commit_symbols (void);
 void gfc_commit_symbol (gfc_symbol *);