misc: Add explicit overrides and fix other clang >= 3.5 issues

This patch adds explicit overrides as this is now required when using
"-Wall" with clang >= 3.5, the latter now part of the most recent
XCode. The patch consequently removes "virtual" for those methods
where "override" is added. The latter should be enough of an
indication.

As part of this patch, a few minor issues that clang >= 3.5 complains
about are also resolved (unused methods and variables).

1 files changed, 4 insertions, 4 deletions

diff --git a/src/mem/ruby/system/RubySystem.hh b/src/mem/ruby/system/RubySystem.hh
index 23974e924..e396dce64 100644
--- a/src/mem/ruby/system/RubySystem.hh
+++ b/src/mem/ruby/system/RubySystem.hh
@@ -89,16 +89,16 @@ class RubySystem : public ClockedObject
         return m_profiler;
     }
 
-    void regStats() { m_profiler->regStats(name()); }
+    void regStats() override { m_profiler->regStats(name()); }
     void collateStats() { m_profiler->collateStats(); }
-    void resetStats();
+    void resetStats() override;
 
-    void memWriteback();
+    void memWriteback() override;
     void serialize(CheckpointOut &cp) const override;
     void unserialize(CheckpointIn &cp) override;
     void drainResume() override;
     void process();
-    void startup();
+    void startup() override;
     bool functionalRead(Packet *ptr);
     bool functionalWrite(Packet *ptr);