cmake US_HAVE_TR1_UNORDERED_SET examples

MITK/MITK Modules/CppMicroServices/CMakeLists.txt :307 

CHECK_CXX_SOURCE_COMPILES("#include <unordered_set>\nint main() { std::tr1::unordered_set<int> s; return 0; }"
                            US_HAVE_TR1_UNORDERED_SET)

MITK/MITK Modules/CppMicroServices/CMakeLists.txt :312 

CHECK_CXX_SOURCE_COMPILES("#include <tr1/unordered_set>\nint main() { std::tr1::unordered_set<int> s; return 0; }"
                            US_HAVE_TR1_UNORDERED_SET)