4 files changed, 27 insertions, 3 deletions

diff --git a/Source/cmGlobalGenerator.cxx b/Source/cmGlobalGenerator.cxx
index 4772474..95747f2 100644
--- a/Source/cmGlobalGenerator.cxx
+++ b/Source/cmGlobalGenerator.cxx
@@ -319,6 +319,12 @@ void cmGlobalGenerator::FindMakeProgram(cmMakefile* mf)
   }
 }
 
+bool cmGlobalGenerator::CheckLanguages(
+  std::vector<std::string> const& /* languages */, cmMakefile* /* mf */) const
+{
+  return true;
+}
+
 // enable the given language
 //
 // The following files are loaded in this order:
@@ -428,6 +434,10 @@ void cmGlobalGenerator::EnableLanguage(
   // find and make sure CMAKE_MAKE_PROGRAM is defined
   this->FindMakeProgram(mf);
 
+  if (!this->CheckLanguages(languages, mf)) {
+    return;
+  }
+
   // try and load the CMakeSystem.cmake if it is there
   std::string fpath = rootBin;
   bool const readCMakeSystem = !mf->GetDefinition("CMAKE_SYSTEM_LOADED");
diff --git a/Source/cmGlobalGenerator.h b/Source/cmGlobalGenerator.h
index f7b2e59..7bc389d 100644
--- a/Source/cmGlobalGenerator.h
+++ b/Source/cmGlobalGenerator.h
@@ -381,6 +381,8 @@ protected:
   void SetLanguageEnabledFlag(const std::string& l, cmMakefile* mf);
   void SetLanguageEnabledMaps(const std::string& l, cmMakefile* mf);
   void FillExtensionToLanguageMap(const std::string& l, cmMakefile* mf);
+  virtual bool CheckLanguages(std::vector<std::string> const& languages,
+                              cmMakefile* mf) const;
   virtual void PrintCompilerAdvice(std::ostream& os, std::string const& lang,
                                    const char* envVar) const;
 
diff --git a/Source/cmGlobalNinjaGenerator.cxx b/Source/cmGlobalNinjaGenerator.cxx
index b913621..8146ea5 100644
--- a/Source/cmGlobalNinjaGenerator.cxx
+++ b/Source/cmGlobalNinjaGenerator.cxx
@@ -561,12 +561,22 @@ void cmGlobalNinjaGenerator::FindMakeProgram(cmMakefile* mf)
   }
 }
 
+bool cmGlobalNinjaGenerator::CheckLanguages(
+  std::vector<std::string> const& languages, cmMakefile* mf) const
+{
+  if (std::find(languages.begin(), languages.end(), "Fortran") !=
+      languages.end()) {
+    mf->IssueMessage(cmake::FATAL_ERROR,
+                     "The Ninja generator does not support Fortran yet.");
+    cmSystemTools::SetFatalErrorOccured();
+    return false;
+  }
+  return true;
+}
+
 void cmGlobalNinjaGenerator::EnableLanguage(
   std::vector<std::string> const& langs, cmMakefile* mf, bool optional)
 {
-  if (std::find(langs.begin(), langs.end(), "Fortran") != langs.end()) {
-    cmSystemTools::Error("The Ninja generator does not support Fortran yet.");
-  }
   this->cmGlobalGenerator::EnableLanguage(langs, mf, optional);
   for (std::vector<std::string>::const_iterator l = langs.begin();
        l != langs.end(); ++l) {
diff --git a/Source/cmGlobalNinjaGenerator.h b/Source/cmGlobalNinjaGenerator.h
index 0201685..ac7a6b1 100644
--- a/Source/cmGlobalNinjaGenerator.h
+++ b/Source/cmGlobalNinjaGenerator.h
@@ -355,6 +355,8 @@ protected:
 private:
   std::string GetEditCacheCommand() const CM_OVERRIDE;
   void FindMakeProgram(cmMakefile* mf) CM_OVERRIDE;
+  bool CheckLanguages(std::vector<std::string> const& languages,
+                      cmMakefile* mf) const CM_OVERRIDE;
 
   void OpenBuildFileStream();
   void CloseBuildFileStream();