diff --git a/Source/cmGlobalGenerator.cxx b/Source/cmGlobalGenerator.cxx
index 621f1d4b1..2dddc7dc1 100644
--- a/Source/cmGlobalGenerator.cxx
+++ b/Source/cmGlobalGenerator.cxx
@@ -2117,50 +2117,6 @@ void cmGlobalGenerator::FillProjectMap()
     }
 }
 
-
-// Build a map that contains a the set of targets used by each local
-// generator directory level.
-void cmGlobalGenerator::FillLocalGeneratorToTargetMap()
-{
-  this->LocalGeneratorToTargetMap.clear();
-  // Loop over all targets in all local generators.
-  for(std::vector<cmLocalGenerator*>::const_iterator
-        lgi = this->LocalGenerators.begin();
-      lgi != this->LocalGenerators.end(); ++lgi)
-    {
-    cmLocalGenerator* lg = *lgi;
-    cmMakefile* mf = lg->GetMakefile();
-    cmTargets const& targets = mf->GetTargets();
-    for(cmTargets::const_iterator t = targets.begin(); t != targets.end(); ++t)
-      {
-      cmTarget const& target = t->second;
-
-      cmGeneratorTarget* gt = this->GetGeneratorTarget(&target);
-
-      // Consider the directory containing the target and all its
-      // parents until something excludes the target.
-      for(cmLocalGenerator* clg = lg; clg && !this->IsExcluded(clg, gt);
-          clg = clg->GetParent())
-        {
-        // This local generator includes the target.
-        std::set<cmGeneratorTarget const*>& targetSet =
-          this->LocalGeneratorToTargetMap[clg];
-        targetSet.insert(gt);
-
-        // Add dependencies of the included target.  An excluded
-        // target may still be included if it is a dependency of a
-        // non-excluded target.
-        TargetDependSet const& tgtdeps = this->GetTargetDirectDepends(gt);
-        for(TargetDependSet::const_iterator ti = tgtdeps.begin();
-            ti != tgtdeps.end(); ++ti)
-          {
-          targetSet.insert(*ti);
-          }
-        }
-      }
-    }
-}
-
 cmMakefile*
 cmGlobalGenerator::FindMakefile(const std::string& start_dir) const
 {
diff --git a/Source/cmGlobalGenerator.h b/Source/cmGlobalGenerator.h
index a13bede8f..86f52af6e 100644
--- a/Source/cmGlobalGenerator.h
+++ b/Source/cmGlobalGenerator.h
@@ -398,7 +398,7 @@ protected:
   void CheckLocalGenerators();
   bool IsExcluded(cmLocalGenerator* root, cmLocalGenerator* gen) const;
   bool IsExcluded(cmLocalGenerator* root, cmGeneratorTarget* target) const;
-  void FillLocalGeneratorToTargetMap();
+  virtual void FillLocalGeneratorToTargetMap() {}
   void CreateDefaultGlobalTargets(cmTargets* targets);
   cmTarget CreateGlobalTarget(const std::string& name, const char* message,
     const cmCustomCommandLines* commandLines,
@@ -413,8 +413,6 @@ protected:
   cmMakefile* CurrentMakefile;
   // map from project name to vector of local generators in that project
   std::map<std::string, std::vector<cmLocalGenerator*> > ProjectMap;
-  std::map<cmLocalGenerator*, std::set<cmGeneratorTarget const*> >
-                                                    LocalGeneratorToTargetMap;
 
   // Set of named installation components requested by the project.
   std::set<std::string> InstallComponents;
diff --git a/Source/cmGlobalUnixMakefileGenerator3.cxx b/Source/cmGlobalUnixMakefileGenerator3.cxx
index 76d059ee2..255b59d94 100644
--- a/Source/cmGlobalUnixMakefileGenerator3.cxx
+++ b/Source/cmGlobalUnixMakefileGenerator3.cxx
@@ -917,6 +917,49 @@ cmGlobalUnixMakefileGenerator3
     }
 }
 
+// Build a map that contains a the set of targets used by each local
+// generator directory level.
+void cmGlobalUnixMakefileGenerator3::FillLocalGeneratorToTargetMap()
+{
+  this->LocalGeneratorToTargetMap.clear();
+  // Loop over all targets in all local generators.
+  for(std::vector<cmLocalGenerator*>::const_iterator
+        lgi = this->LocalGenerators.begin();
+      lgi != this->LocalGenerators.end(); ++lgi)
+    {
+    cmLocalGenerator* lg = *lgi;
+    cmMakefile* mf = lg->GetMakefile();
+    cmTargets const& targets = mf->GetTargets();
+    for(cmTargets::const_iterator t = targets.begin(); t != targets.end(); ++t)
+      {
+      cmTarget const& target = t->second;
+
+      cmGeneratorTarget* gt = this->GetGeneratorTarget(&target);
+
+      // Consider the directory containing the target and all its
+      // parents until something excludes the target.
+      for(cmLocalGenerator* clg = lg; clg && !this->IsExcluded(clg, gt);
+          clg = clg->GetParent())
+        {
+        // This local generator includes the target.
+        std::set<cmGeneratorTarget const*>& targetSet =
+          this->LocalGeneratorToTargetMap[clg];
+        targetSet.insert(gt);
+
+        // Add dependencies of the included target.  An excluded
+        // target may still be included if it is a dependency of a
+        // non-excluded target.
+        TargetDependSet const& tgtdeps = this->GetTargetDirectDepends(gt);
+        for(TargetDependSet::const_iterator ti = tgtdeps.begin();
+            ti != tgtdeps.end(); ++ti)
+          {
+          targetSet.insert(*ti);
+          }
+        }
+      }
+    }
+}
+
 //----------------------------------------------------------------------------
 size_t
 cmGlobalUnixMakefileGenerator3
diff --git a/Source/cmGlobalUnixMakefileGenerator3.h b/Source/cmGlobalUnixMakefileGenerator3.h
index fc53fa802..de7d858b3 100644
--- a/Source/cmGlobalUnixMakefileGenerator3.h
+++ b/Source/cmGlobalUnixMakefileGenerator3.h
@@ -206,6 +206,10 @@ protected:
 private:
   virtual const char* GetBuildIgnoreErrorsFlag() const { return "-i"; }
   virtual std::string GetEditCacheCommand() const;
+
+  std::map<cmLocalGenerator*, std::set<cmGeneratorTarget const*> >
+                                                    LocalGeneratorToTargetMap;
+  virtual void FillLocalGeneratorToTargetMap();
 };
 
 #endif