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, 2 insertions, 2 deletions

diff --git a/src/sim/voltage_domain.hh b/src/sim/voltage_domain.hh
index d22556083..e7e4f8180 100644
--- a/src/sim/voltage_domain.hh
+++ b/src/sim/voltage_domain.hh
@@ -111,7 +111,7 @@ class VoltageDomain : public SimObject
      * Startup has all SrcClockDomains registered with this voltage domain, so
      * try to make sure that all perf level requests from them are met.
      */
-    void startup();
+    void startup() override;
 
     /**
      * Recomputes the highest (fastest, i.e., numerically lowest) requested
@@ -126,7 +126,7 @@ class VoltageDomain : public SimObject
      */
     bool sanitiseVoltages();
 
-    void regStats();
+    void regStats() override;
 
     void serialize(CheckpointOut &cp) const override;
     void unserialize(CheckpointIn &cp) override;