Fixed fenv.h detection

cmake/CorsikaDefines.cmake

 #
 # Floating point exception support - select implementation to use
 #
-try_compile (HAS_FEENABLEEXCEPT "${CMAKE_CURRENT_BINARY_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}/try_feenableexcept.cc")
+include(CheckIncludeFileCXX)
+CHECK_INCLUDE_FILE_CXX("fenv.h" HAS_FEENABLEEXCEPT)
 if (HAS_FEENABLEEXCEPT) # FLOATING_POINT_ENVIRONMENT
     set (CORSIKA_HAS_FEENABLEEXCEPT 1)
     set_property(DIRECTORY ${CMAKE_HOME_DIRECTORY} APPEND PROPERTY COMPILE_DEFINITIONS "HAS_FEENABLEEXCEPT")
 endif ()
 
 
-
+#
+# General OS Detection
+#
 if (${CMAKE_SYSTEM_NAME} MATCHES "Windows")
     set(CORSIKA_OS_WINDOWS TRUE)
      set (CORSIKA_OS "Windows")

corsika/framework/utility/Singleton.hpp

@@ -46,8 +46,9 @@ namespace corsika {
       return instance;
     }
 
-    Singleton(const Singleton&) = delete;
-    Singleton& operator=(const Singleton&) = delete;
+    Singleton(const Singleton&) = delete; //Singleton Classes should not be copied. Removes move constructor and move assignment as well
+    Singleton& operator=(const Singleton&) = delete; //Singleton Classes should not be copied.
+    
 
   protected:
     // derived class can call ctor and dtor