cmake US_HAVE_STD_HASH_CLASS examples

MITK/MITK Modules/CppMicroServices/CMakeLists.txt :271 

CHECK_CXX_SOURCE_COMPILES("#include <unordered_map>\nstruct A { friend class std::hash<int>; }; int main() { return 0; }"
                              US_HAVE_STD_HASH_CLASS)

MITK/MITK Modules/CppMicroServices/CMakeLists.txt :291 

CHECK_CXX_SOURCE_COMPILES("#include <tr1/unordered_map>\nstruct A { friend class std::hash<int>; }; int main() { return 0; }"
                              US_HAVE_STD_HASH_CLASS)