G M: Improve support for compilers not supporting defaulted functions. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@189184 91177308-0d34-0410-b5e6-96231b3b80d8 
diff --git a/include/system_error b/include/system_error index afc73f2..66bf6d6 100644 --- a/include/system_error +++ b/include/system_error 
@@ -371,7 +371,7 @@  error_category() _NOEXCEPT;  #else  _LIBCPP_ALWAYS_INLINE - _LIBCPP_CONSTEXPR_AFTER_CXX11 error_category() _NOEXCEPT = default; + _LIBCPP_CONSTEXPR_AFTER_CXX11 error_category() _NOEXCEPT _LIBCPP_DEFAULT;  #endif  private:  error_category(const error_category&);// = delete;