Add missing file

git-svn-id: http://svn.code.sf.net/p/simox/code/trunk@714 042f3d55-54a8-47e9-b7fb-15903f145c44

CMakeModules/Cxx11Test.cmake

+include(TestCXXAcceptsFlag)
+
+check_cxx_accepts_flag("-std=c++11" CXX_FLAG_CXX11)
+check_cxx_accepts_flag("-std=c++0x" CXX_FLAG_CXX0x)
+IF (CXX_FLAG_CXX11)
+  SET (CXX11_FLAG "-std=c++11" CACHE STRING "Flag for enabling c++11")
+ELSEIF(CXX_FLAG_CXX0x)
+  SET (CXX11_FLAG "-std=c++0x" CACHE STRING "Flag for enabling c++11")
+ELSEIF (MSVC)
+  # on by default
+ELSE ()
+  message (WARNING "Your compiler does not seem to support C++11!")
+ENDIF()
+
+