VS: Use AddLanguageFlags to de-duplicate CMAKE_<LANG>_FLAGS* lookup

Source/cmLocalVisualStudio7Generator.cxx

@@ -662,14 +662,7 @@ void cmLocalVisualStudio7Generator::WriteConfiguration(
     langForClCompile = linkLanguage;
     if (langForClCompile == "C" || langForClCompile == "CXX" ||
         langForClCompile == "Fortran") {
-      std::string baseFlagVar = "CMAKE_";
-      baseFlagVar += langForClCompile;
-      baseFlagVar += "_FLAGS";
-      flags = this->Makefile->GetRequiredDefinition(baseFlagVar);
-      std::string flagVar =
-        baseFlagVar + std::string("_") + cmSystemTools::UpperCase(configName);
-      flags += " ";
-      flags += this->Makefile->GetRequiredDefinition(flagVar);
+      this->AddLanguageFlags(flags, target, langForClCompile, configName);
     }
     // set the correct language
     if (linkLanguage == "C") {

Source/cmVisualStudio10TargetGenerator.cxx

@@ -2540,14 +2540,8 @@ bool cmVisualStudio10TargetGenerator::ComputeClOptions(
   }
   this->LangForClCompile = langForClCompile;
   if (!langForClCompile.empty()) {
-    std::string baseFlagVar = "CMAKE_";
-    baseFlagVar += langForClCompile;
-    baseFlagVar += "_FLAGS";
-    flags = this->Makefile->GetRequiredDefinition(baseFlagVar);
-    std::string flagVar =
-      baseFlagVar + "_" + cmSystemTools::UpperCase(configName);
-    flags += " ";
-    flags += this->Makefile->GetRequiredDefinition(flagVar);
+    this->LocalGenerator->AddLanguageFlags(flags, this->GeneratorTarget,
+                                           langForClCompile, configName);
     this->LocalGenerator->AddCompileOptions(flags, this->GeneratorTarget,
                                             langForClCompile, configName);
   }