Annex C (informative) Compatibility [diff]

C.3 C++ and ISO C++ 2011 [diff.cpp11]

C.3.5 [library]: library introduction [diff.cpp11.library]

Affected subclause: [headers]
Change: New header.

Rationale: New functionality.

Effect on original feature: The C++ header <shared_­mutex> ([shared.mutex.syn]) is new.
Valid C++ 2011 code that #includes a header with that name may be invalid in this International Standard.