1 files changed, 7 insertions, 1 deletions
diff --git a/build2/install/rule.hxx b/build2/install/rule.hxx
index ad0d8ec..617beab 100644
--- a/build2/install/rule.hxx
+++ b/build2/install/rule.hxx
@@ -70,6 +70,12 @@ namespace build2
       virtual bool
       uninstall_extra (const file&, const install_dir&) const;
 
+      // Extra update for install hooks. It is executed after the target has
+      // been updated but only for those that will actually be installed.
+      //
+      virtual target_state
+      update_extra (action, const target&) const;
+
       // Installation "commands".
       //
       // If verbose is false, then only print the command at verbosity level 2
@@ -98,7 +104,7 @@ namespace build2
                    const path& name,
                    bool verbose);
 
-    private:
+    protected:
       target_state
       perform_install (action, const target&) const;