+2020-08-19 Jonathan Wakely <jwakely@redhat.com>
+
+ Backported from master:
+ 2020-08-19 Jonathan Wakely <jwakely@redhat.com>
+
+ * include/bits/c++config (_GLIBCXX_DEPRECATED_SUGGEST): New
+ macro for "use 'foo' instead" message in deprecated warnings.
+ * include/bits/ios_base.h (io_state, open_mode, seek_dir)
+ (streampos, streamoff): Use _GLIBCXX_DEPRECATED_SUGGEST.
+ * include/std/streambuf (stossc): Replace C++11 attribute
+ with _GLIBCXX_DEPRECATED_SUGGEST.
+ * testsuite/27_io/types/1.cc: Check for deprecated warnings.
+ Also check for io_state, open_mode and seek_dir typedefs.
+
2020-08-11 Andrea Corallo <andrea.corallo@arm.com>
Backported from master: