diff --git a/Source/cmCommonTargetGenerator.cxx b/Source/cmCommonTargetGenerator.cxx
index afe557cf3..70e9ce29b 100644
--- a/Source/cmCommonTargetGenerator.cxx
+++ b/Source/cmCommonTargetGenerator.cxx
@@ -284,3 +284,51 @@ std::string cmCommonTargetGenerator::GetFrameworkFlags(std::string const& l)
     }
   return flags;
 }
+
+//----------------------------------------------------------------------------
+std::string cmCommonTargetGenerator::GetFlags(const std::string &l)
+{
+  ByLanguageMap::iterator i = this->FlagsByLanguage.find(l);
+  if (i == this->FlagsByLanguage.end())
+    {
+    std::string flags;
+    const char *lang = l.c_str();
+
+    // Add language feature flags.
+    this->AddFeatureFlags(flags, lang);
+
+    this->LocalGenerator->AddArchitectureFlags(flags, this->GeneratorTarget,
+                                               lang, this->ConfigName);
+
+    // Fortran-specific flags computed for this target.
+    if(l == "Fortran")
+      {
+      this->AddFortranFlags(flags);
+      }
+
+    this->LocalGenerator->AddCMP0018Flags(flags, this->Target,
+                                          lang, this->ConfigName);
+
+    this->LocalGenerator->AddVisibilityPresetFlags(flags, this->Target,
+                                                   lang);
+
+    // Add include directory flags.
+    this->AddIncludeFlags(flags, lang);
+
+    // Append old-style preprocessor definition flags.
+    this->LocalGenerator->
+      AppendFlags(flags, this->Makefile->GetDefineFlags());
+
+    // Add framework directory flags.
+    this->LocalGenerator->
+      AppendFlags(flags,this->GetFrameworkFlags(l));
+
+    // Add target-specific flags.
+    this->LocalGenerator->AddCompileOptions(flags, this->Target,
+                                            lang, this->ConfigName);
+
+    ByLanguageMap::value_type entry(l, flags);
+    i = this->FlagsByLanguage.insert(entry).first;
+    }
+  return i->second;
+}
diff --git a/Source/cmCommonTargetGenerator.h b/Source/cmCommonTargetGenerator.h
index 644d97245..5407c61d6 100644
--- a/Source/cmCommonTargetGenerator.h
+++ b/Source/cmCommonTargetGenerator.h
@@ -74,6 +74,13 @@ protected:
 
   // Return the a string with -F flags on apple
   std::string GetFrameworkFlags(std::string const& l);
+
+  virtual void AddIncludeFlags(std::string& flags,
+                               std::string const& lang) = 0;
+
+  typedef std::map<std::string, std::string> ByLanguageMap;
+  std::string GetFlags(const std::string &l);
+  ByLanguageMap FlagsByLanguage;
 };
 
 #endif
diff --git a/Source/cmMakefileTargetGenerator.cxx b/Source/cmMakefileTargetGenerator.cxx
index 41457393c..10799c6f7 100644
--- a/Source/cmMakefileTargetGenerator.cxx
+++ b/Source/cmMakefileTargetGenerator.cxx
@@ -272,54 +272,6 @@ void cmMakefileTargetGenerator::WriteCommonCodeRules()
     << "\n\n";
 }
 
-//----------------------------------------------------------------------------
-std::string cmMakefileTargetGenerator::GetFlags(const std::string &l)
-{
-  ByLanguageMap::iterator i = this->FlagsByLanguage.find(l);
-  if (i == this->FlagsByLanguage.end())
-    {
-    std::string flags;
-    const char *lang = l.c_str();
-
-    // Add language feature flags.
-    this->AddFeatureFlags(flags, lang);
-
-    this->LocalGenerator->AddArchitectureFlags(flags, this->GeneratorTarget,
-                                               lang, this->ConfigName);
-
-    // Fortran-specific flags computed for this target.
-    if(l == "Fortran")
-      {
-      this->AddFortranFlags(flags);
-      }
-
-    this->LocalGenerator->AddCMP0018Flags(flags, this->Target,
-                                          lang, this->ConfigName);
-
-    this->LocalGenerator->AddVisibilityPresetFlags(flags, this->Target,
-                                                   lang);
-
-    // Add include directory flags.
-    this->AddIncludeFlags(flags, lang);
-
-    // Append old-style preprocessor definition flags.
-    this->LocalGenerator->
-      AppendFlags(flags, this->Makefile->GetDefineFlags());
-
-    // Add framework directory flags.
-    this->LocalGenerator->
-      AppendFlags(flags,this->GetFrameworkFlags(l));
-
-    // Add target-specific flags.
-    this->LocalGenerator->AddCompileOptions(flags, this->Target,
-                                            lang, this->ConfigName);
-
-    ByLanguageMap::value_type entry(l, flags);
-    i = this->FlagsByLanguage.insert(entry).first;
-    }
-  return i->second;
-}
-
 std::string cmMakefileTargetGenerator::GetDefines(const std::string &l)
 {
   ByLanguageMap::iterator i = this->DefinesByLanguage.find(l);
diff --git a/Source/cmMakefileTargetGenerator.h b/Source/cmMakefileTargetGenerator.h
index e3e3a133f..9d05cd5cb 100644
--- a/Source/cmMakefileTargetGenerator.h
+++ b/Source/cmMakefileTargetGenerator.h
@@ -235,9 +235,6 @@ protected:
   cmOSXBundleGenerator* OSXBundleGenerator;
   MacOSXContentGeneratorType* MacOSXContentGenerator;
 
-  typedef std::map<std::string, std::string> ByLanguageMap;
-  std::string GetFlags(const std::string &l);
-  ByLanguageMap FlagsByLanguage;
   std::string GetDefines(const std::string &l);
   ByLanguageMap DefinesByLanguage;
 };
diff --git a/Source/cmNinjaTargetGenerator.cxx b/Source/cmNinjaTargetGenerator.cxx
index cd54c4dce..05120dada 100644
--- a/Source/cmNinjaTargetGenerator.cxx
+++ b/Source/cmNinjaTargetGenerator.cxx
@@ -110,55 +110,7 @@ std::string
 cmNinjaTargetGenerator::ComputeFlagsForObject(cmSourceFile const* source,
                                               const std::string& language)
 {
-  bool hasLangCached = this->LanguageFlags.count(language) != 0;
-  std::string& languageFlags = this->LanguageFlags[language];
-  if(!hasLangCached)
-    {
-    this->AddFeatureFlags(languageFlags, language);
-
-    this->GetLocalGenerator()->AddArchitectureFlags(languageFlags,
-                                                    this->GeneratorTarget,
-                                                    language,
-                                                    this->GetConfigName());
-
-    // Fortran-specific flags computed for this target.
-    if(language == "Fortran")
-      {
-      this->AddFortranFlags(languageFlags);
-      }
-
-    // Add shared-library flags if needed.
-    this->LocalGenerator->AddCMP0018Flags(languageFlags, this->Target,
-                                          language,
-                                          this->GetConfigName());
-
-    this->LocalGenerator->AddVisibilityPresetFlags(languageFlags, this->Target,
-                                                   language);
-
-    // Add include directory flags.
-    this->AddIncludeFlags(languageFlags, language);
-
-    // Append old-style preprocessor definition flags.
-    this->LocalGenerator->AppendFlags(languageFlags,
-                                      this->Makefile->GetDefineFlags());
-
-    // Add framework directory flags.
-    this->LocalGenerator->
-      AppendFlags(languageFlags, this->GetFrameworkFlags(language));
-
-    // Add target-specific flags.
-    this->LocalGenerator->AddCompileOptions(languageFlags, this->Target,
-                                            language,
-                                            this->GetConfigName());
-    }
-
-  std::string flags = languageFlags;
-
-  // Add Fortran format flags.
-  if(language == "Fortran")
-    {
-    this->AppendFortranFormatFlags(flags, *source);
-    }
+  std::string flags = this->GetFlags(language);
 
   // Add source file specific flags.
   this->LocalGenerator->AppendFlags(flags,
diff --git a/Source/cmNinjaTargetGenerator.h b/Source/cmNinjaTargetGenerator.h
index 0cd5e4876..89124316d 100644
--- a/Source/cmNinjaTargetGenerator.h
+++ b/Source/cmNinjaTargetGenerator.h
@@ -149,9 +149,6 @@ private:
   /// List of object files for this target.
   cmNinjaDeps Objects;
   std::vector<cmCustomCommand const*> CustomCommands;
-
-  typedef std::map<std::string, std::string> LanguageFlagMap;
-  LanguageFlagMap LanguageFlags;
 };
 
 #endif // ! cmNinjaTargetGenerator_h