diff --git a/Source/QtDialog/QCMake.cxx b/Source/QtDialog/QCMake.cxx
index 3df48d177..009d06e2c 100644
--- a/Source/QtDialog/QCMake.cxx
+++ b/Source/QtDialog/QCMake.cxx
@@ -117,7 +117,8 @@ void QCMake::setBinaryDirectory(const QString& _dir)
       }
     if ( itm.Find("CMAKE_GENERATOR"))
       {
-      const char* extraGen = cachem->GetCacheValue("CMAKE_EXTRA_GENERATOR");
+      const char* extraGen = cachem
+                        ->GetInitializedCacheValue("CMAKE_EXTRA_GENERATOR");
       std::string curGen = cmExternalMakefileProjectGenerator::
         CreateFullGeneratorName(itm.GetValue(), extraGen? extraGen : "");
       this->setGenerator(QString::fromLocal8Bit(curGen.c_str()));
diff --git a/Source/cmCacheManager.cxx b/Source/cmCacheManager.cxx
index b8dfe04c7..5387d0c81 100644
--- a/Source/cmCacheManager.cxx
+++ b/Source/cmCacheManager.cxx
@@ -283,14 +283,16 @@ bool cmCacheManager::LoadCache(const std::string& path,
     }
   this->CacheMajorVersion = 0;
   this->CacheMinorVersion = 0;
-  if(const char* cmajor = this->GetCacheValue("CMAKE_CACHE_MAJOR_VERSION"))
+  if(const char* cmajor =
+                  this->GetInitializedCacheValue("CMAKE_CACHE_MAJOR_VERSION"))
     {
     unsigned int v=0;
     if(sscanf(cmajor, "%u", &v) == 1)
       {
       this->CacheMajorVersion = v;
       }
-    if(const char* cminor = this->GetCacheValue("CMAKE_CACHE_MINOR_VERSION"))
+    if(const char* cminor =
+                  this->GetInitializedCacheValue("CMAKE_CACHE_MINOR_VERSION"))
       {
       if(sscanf(cminor, "%u", &v) == 1)
         {
@@ -312,10 +314,11 @@ bool cmCacheManager::LoadCache(const std::string& path,
     }
   // check to make sure the cache directory has not
   // been moved
-  if ( internal && this->GetCacheValue("CMAKE_CACHEFILE_DIR") )
+  const char* oldDir = this->GetInitializedCacheValue("CMAKE_CACHEFILE_DIR");
+  if (internal && oldDir)
     {
     std::string currentcwd = path;
-    std::string oldcwd = this->GetCacheValue("CMAKE_CACHEFILE_DIR");
+    std::string oldcwd = oldDir;
     cmSystemTools::ConvertToUnixSlashes(currentcwd);
     currentcwd += "/CMakeCache.txt";
     oldcwd += "/CMakeCache.txt";
@@ -324,7 +327,7 @@ bool cmCacheManager::LoadCache(const std::string& path,
       std::string message =
         std::string("The current CMakeCache.txt directory ") +
         currentcwd + std::string(" is different than the directory ") +
-        std::string(this->GetCacheValue("CMAKE_CACHEFILE_DIR")) +
+        std::string(this->GetInitializedCacheValue("CMAKE_CACHEFILE_DIR")) +
         std::string(" where CMakeCache.txt was created. This may result "
                     "in binaries being created in the wrong place. If you "
                     "are not sure, reedit the CMakeCache.txt");
@@ -654,7 +657,8 @@ cmCacheManager::CacheIterator cmCacheManager::GetCacheIterator(
   return CacheIterator(*this, key);
 }
 
-const char* cmCacheManager::GetCacheValue(const std::string& key) const
+const char*
+cmCacheManager::GetInitializedCacheValue(const std::string& key) const
 {
   CacheEntryMap::const_iterator i = this->Cache.find(key);
   if(i != this->Cache.end() &&
diff --git a/Source/cmCacheManager.h b/Source/cmCacheManager.h
index f7f877606..31d302ac9 100644
--- a/Source/cmCacheManager.h
+++ b/Source/cmCacheManager.h
@@ -137,7 +137,7 @@ public:
                          CacheEntryType& type);
 
   ///! Get a value from the cache given a key
-  const char* GetCacheValue(const std::string& key) const;
+  const char* GetInitializedCacheValue(const std::string& key) const;
 
   /** Get the version of CMake that wrote the cache.  */
   unsigned int GetCacheMajorVersion() const
diff --git a/Source/cmCommandArgumentParserHelper.cxx b/Source/cmCommandArgumentParserHelper.cxx
index 747b7e434..99bf5f55f 100644
--- a/Source/cmCommandArgumentParserHelper.cxx
+++ b/Source/cmCommandArgumentParserHelper.cxx
@@ -90,7 +90,8 @@ char* cmCommandArgumentParserHelper::ExpandSpecialVariable(const char* key,
     }
   if ( strcmp(key, "CACHE") == 0 )
     {
-    if(const char* c = this->Makefile->GetCacheManager()->GetCacheValue(var))
+    if(const char* c = this->Makefile->GetCacheManager()
+                           ->GetInitializedCacheValue(var))
       {
       if(this->EscapeQuotes)
         {
diff --git a/Source/cmExtraEclipseCDT4Generator.cxx b/Source/cmExtraEclipseCDT4Generator.cxx
index 810ec57ee..0d32e4bac 100644
--- a/Source/cmExtraEclipseCDT4Generator.cxx
+++ b/Source/cmExtraEclipseCDT4Generator.cxx
@@ -205,7 +205,7 @@ void cmExtraEclipseCDT4Generator::AddEnvVar(cmGeneratedFileStream& fout,
 
   std::string cacheEntryName = "CMAKE_ECLIPSE_ENVVAR_";
   cacheEntryName += envVar;
-  const char* cacheValue = mf->GetCacheManager()->GetCacheValue(
+  const char* cacheValue = mf->GetCacheManager()->GetInitializedCacheValue(
                                                        cacheEntryName);
 
   // now we have both, decide which one to use
diff --git a/Source/cmGlobalGenerator.cxx b/Source/cmGlobalGenerator.cxx
index 3c0a0e244..f23caa6ae 100644
--- a/Source/cmGlobalGenerator.cxx
+++ b/Source/cmGlobalGenerator.cxx
@@ -179,7 +179,7 @@ void cmGlobalGenerator::ResolveLanguageCompiler(const std::string &lang,
     return;
     }
   const char* cname = this->GetCMakeInstance()->
-    GetCacheManager()->GetCacheValue(langComp);
+    GetCacheManager()->GetInitializedCacheValue(langComp);
   std::string changeVars;
   if(cname && !optional)
     {
@@ -1641,7 +1641,7 @@ int cmGlobalGenerator::TryCompile(const std::string& srcdir,
   // and there is a good chance that the try compile stuff will
   // take the bulk of the time, so try and guess some progress
   // by getting closer and closer to 100 without actually getting there.
-  if (!this->CMakeInstance->GetCacheManager()->GetCacheValue
+  if (!this->CMakeInstance->GetCacheManager()->GetInitializedCacheValue
       ("CMAKE_NUMBER_OF_LOCAL_GENERATORS"))
     {
     // If CMAKE_NUMBER_OF_LOCAL_GENERATORS is not set
@@ -1839,7 +1839,7 @@ void cmGlobalGenerator::AddLocalGenerator(cmLocalGenerator *lg)
   // update progress
   // estimate how many lg there will be
   const char *numGenC =
-    this->CMakeInstance->GetCacheManager()->GetCacheValue
+    this->CMakeInstance->GetCacheManager()->GetInitializedCacheValue
     ("CMAKE_NUMBER_OF_LOCAL_GENERATORS");
 
   if (!numGenC)
diff --git a/Source/cmMakefile.cxx b/Source/cmMakefile.cxx
index ad4ad7c91..b6eff3dac 100644
--- a/Source/cmMakefile.cxx
+++ b/Source/cmMakefile.cxx
@@ -2432,7 +2432,7 @@ bool cmMakefile::IsDefinitionSet(const std::string& name) const
   this->Internal->VarUsageStack.top().insert(name);
   if(!def)
     {
-    def = this->GetCacheManager()->GetCacheValue(name);
+    def = this->GetCacheManager()->GetInitializedCacheValue(name);
     }
 #ifdef CMAKE_BUILD_WITH_CMAKE
   if(cmVariableWatch* vv = this->GetVariableWatch())
@@ -2457,7 +2457,7 @@ const char* cmMakefile::GetDefinition(const std::string& name) const
   const char* def = this->Internal->VarStack.top().Get(name);
   if(!def)
     {
-    def = this->GetCacheManager()->GetCacheValue(name);
+    def = this->GetCacheManager()->GetInitializedCacheValue(name);
     }
 #ifdef CMAKE_BUILD_WITH_CMAKE
   cmVariableWatch* vv = this->GetVariableWatch();
@@ -2835,7 +2835,8 @@ cmake::MessageType cmMakefile::ExpandVariablesInStringNew(
               value = cmSystemTools::GetEnv(lookup.c_str());
               break;
             case CACHE:
-              value = this->GetCacheManager()->GetCacheValue(lookup);
+              value = this->GetCacheManager()
+                          ->GetInitializedCacheValue(lookup);
               break;
             }
           // Get the string we're meant to append to.
@@ -4903,7 +4904,7 @@ bool cmMakefile::SetPolicy(cmPolicies::PolicyID id,
      (status == cmPolicies::WARN || status == cmPolicies::OLD))
     {
     if(!(this->GetCacheManager()
-         ->GetCacheValue("CMAKE_BACKWARDS_COMPATIBILITY")))
+         ->GetInitializedCacheValue("CMAKE_BACKWARDS_COMPATIBILITY")))
       {
       // Set it to 2.4 because that is the last version where the
       // variable had meaning.
diff --git a/Source/cmake.cxx b/Source/cmake.cxx
index e78141799..210c0ef33 100644
--- a/Source/cmake.cxx
+++ b/Source/cmake.cxx
@@ -344,7 +344,8 @@ bool cmake::SetCacheArgs(const std::vector<std::string>& args)
         std::string cachedValue;
         if(this->WarnUnusedCli)
           {
-          if(const char *v = this->CacheManager->GetCacheValue(var))
+          if(const char *v = this->CacheManager
+                                 ->GetInitializedCacheValue(var))
             {
             haveValue = true;
             cachedValue = v;
@@ -357,7 +358,8 @@ bool cmake::SetCacheArgs(const std::vector<std::string>& args)
         if(this->WarnUnusedCli)
           {
           if (!haveValue ||
-              cachedValue != this->CacheManager->GetCacheValue(var))
+              cachedValue != this->CacheManager
+                                 ->GetInitializedCacheValue(var))
             {
             this->WatchUnusedCli(var);
             }
@@ -1203,10 +1205,10 @@ int cmake::DoPreConfigureChecks()
     }
 
   // do a sanity check on some values
-  if(this->CacheManager->GetCacheValue("CMAKE_HOME_DIRECTORY"))
+  if(this->CacheManager->GetInitializedCacheValue("CMAKE_HOME_DIRECTORY"))
     {
     std::string cacheStart =
-      this->CacheManager->GetCacheValue("CMAKE_HOME_DIRECTORY");
+      this->CacheManager->GetInitializedCacheValue("CMAKE_HOME_DIRECTORY");
     cacheStart += "/CMakeLists.txt";
     std::string currentStart = this->GetHomeDirectory();
     currentStart += "/CMakeLists.txt";
@@ -1355,9 +1357,9 @@ int cmake::ActualConfigure()
   if(!this->GlobalGenerator)
     {
     const char* genName =
-      this->CacheManager->GetCacheValue("CMAKE_GENERATOR");
+      this->CacheManager->GetInitializedCacheValue("CMAKE_GENERATOR");
     const char* extraGenName =
-      this->CacheManager->GetCacheValue("CMAKE_EXTRA_GENERATOR");
+      this->CacheManager->GetInitializedCacheValue("CMAKE_EXTRA_GENERATOR");
     if(genName)
       {
       std::string fullName = cmExternalMakefileProjectGenerator::
@@ -1435,7 +1437,8 @@ int cmake::ActualConfigure()
       }
     }
 
-  const char* genName = this->CacheManager->GetCacheValue("CMAKE_GENERATOR");
+  const char* genName = this->CacheManager
+                            ->GetInitializedCacheValue("CMAKE_GENERATOR");
   if(genName)
     {
     if(!this->GlobalGenerator->MatchesGeneratorName(genName))
@@ -1451,7 +1454,7 @@ int cmake::ActualConfigure()
       return -2;
       }
     }
-  if(!this->CacheManager->GetCacheValue("CMAKE_GENERATOR"))
+  if(!this->CacheManager->GetInitializedCacheValue("CMAKE_GENERATOR"))
     {
     this->CacheManager->AddCacheEntry("CMAKE_GENERATOR",
                                       this->GlobalGenerator->GetName().c_str(),
@@ -1464,7 +1467,7 @@ int cmake::ActualConfigure()
     }
 
   if(const char* platformName =
-     this->CacheManager->GetCacheValue("CMAKE_GENERATOR_PLATFORM"))
+     this->CacheManager->GetInitializedCacheValue("CMAKE_GENERATOR_PLATFORM"))
     {
     if(this->GeneratorPlatform.empty())
       {
@@ -1492,7 +1495,7 @@ int cmake::ActualConfigure()
     }
 
   if(const char* tsName =
-     this->CacheManager->GetCacheValue("CMAKE_GENERATOR_TOOLSET"))
+     this->CacheManager->GetInitializedCacheValue("CMAKE_GENERATOR_TOOLSET"))
     {
     if(this->GeneratorToolset.empty())
       {
@@ -1546,16 +1549,18 @@ int cmake::ActualConfigure()
   // project requires compatibility with CMake 2.4.  We detect this
   // here by looking for the old CMAKE_BACKWARDS_COMPATIBILITY
   // variable created when CMP0001 is not set to NEW.
-  if(this->GetCacheManager()->GetCacheValue("CMAKE_BACKWARDS_COMPATIBILITY"))
+  if(this->GetCacheManager()
+         ->GetInitializedCacheValue("CMAKE_BACKWARDS_COMPATIBILITY"))
     {
-    if(!this->CacheManager->GetCacheValue("LIBRARY_OUTPUT_PATH"))
+    if(!this->CacheManager->GetInitializedCacheValue("LIBRARY_OUTPUT_PATH"))
       {
       this->CacheManager->AddCacheEntry
         ("LIBRARY_OUTPUT_PATH", "",
          "Single output directory for building all libraries.",
          cmCacheManager::PATH);
       }
-    if(!this->CacheManager->GetCacheValue("EXECUTABLE_OUTPUT_PATH"))
+    if(!this->CacheManager
+            ->GetInitializedCacheValue("EXECUTABLE_OUTPUT_PATH"))
       {
       this->CacheManager->AddCacheEntry
         ("EXECUTABLE_OUTPUT_PATH", "",
@@ -1563,7 +1568,8 @@ int cmake::ActualConfigure()
          cmCacheManager::PATH);
       }
     }
-  if(!this->CacheManager->GetCacheValue("CMAKE_USE_RELATIVE_PATHS"))
+  if(!this->CacheManager
+          ->GetInitializedCacheValue("CMAKE_USE_RELATIVE_PATHS"))
     {
     this->CacheManager->AddCacheEntry
       ("CMAKE_USE_RELATIVE_PATHS", "OFF",
@@ -1578,9 +1584,9 @@ int cmake::ActualConfigure()
     }
 
   if(cmSystemTools::GetFatalErrorOccured() &&
-     (!this->CacheManager->GetCacheValue("CMAKE_MAKE_PROGRAM") ||
+     (!this->CacheManager->GetInitializedCacheValue("CMAKE_MAKE_PROGRAM") ||
       cmSystemTools::IsOff(this->CacheManager->
-                           GetCacheValue("CMAKE_MAKE_PROGRAM"))))
+                           GetInitializedCacheValue("CMAKE_MAKE_PROGRAM"))))
     {
     // We must have a bad generator selection.  Wipe the cache entry so the
     // user can select another.
@@ -1796,7 +1802,7 @@ void cmake::AddCacheEntry(const std::string& key, const char* value,
 
 const char* cmake::GetCacheDefinition(const std::string& name) const
 {
-  return this->CacheManager->GetCacheValue(name);
+  return this->CacheManager->GetInitializedCacheValue(name);
 }
 
 void cmake::AddDefaultCommands()
@@ -1956,7 +1962,8 @@ void cmake::UpdateConversionPathTable()
 {
   // Update the path conversion table with any specified file:
   const char* tablepath =
-    this->CacheManager->GetCacheValue("CMAKE_PATH_TRANSLATION_FILE");
+    this->CacheManager
+        ->GetInitializedCacheValue("CMAKE_PATH_TRANSLATION_FILE");
 
   if(tablepath)
     {
@@ -2190,7 +2197,7 @@ void cmake::TruncateOutputLog(const char* fname)
     {
     return;
     }
-  if ( !this->CacheManager->GetCacheValue("CMAKE_CACHEFILE_DIR") )
+  if ( !this->CacheManager->GetInitializedCacheValue("CMAKE_CACHEFILE_DIR") )
     {
     cmSystemTools::RemoveFile(fullPath);
     return;
@@ -2469,7 +2476,7 @@ int cmake::GetSystemInformation(std::vector<std::string>& args)
   // we have to find the module directory, so we can copy the files
   this->AddCMakePaths();
   std::string modulesPath =
-    this->CacheManager->GetCacheValue("CMAKE_ROOT");
+    this->CacheManager->GetInitializedCacheValue("CMAKE_ROOT");
   modulesPath += "/Modules";
   std::string inFile = modulesPath;
   inFile += "/SystemInformation.cmake";