* include/debug/formater.h: Include bits/c++config.h.
	(_M_error): Mark noreturn.
	* include/bits/c++config (_GLIBCXX_PURE, _GLIBCXX_CONST,
	_GLIBCXX_NORETURN): New.
	* include/bits/stl_tree.h (_Rb_tree_increment, _Rb_tree_increment,
	_Rb_tree_decrement, _Rb_tree_decrement, _Rb_tree_black_count): Mark pure.
	* include/c_compatibility/stdatomic.h (atomic_flag_test_and_set_explicit,
	atomic_flag_clear_explicit, __atomic_flag_wait_explicit,
	__atomic_flag_for_address): Mark by throw ().
	* src/atomic.cc (atomic_flag_test_and_set_explicit,
	atomic_flag_clear_explicit, __atomic_flag_wait_explicit,
	__atomic_flag_for_address): Mark by throw ().

From-SVN: r146317