Annex C (informative) Compatibility [diff]

C.6 C++ and ISO C++ 2003 [diff.cpp03]

C.6.9 [diagnostics]: diagnostics library [diff.cpp03.diagnostics]

Affected subclause: [errno]
Change: Thread-local error numbers.

Rationale: Support for new thread facilities.

Effect on original feature: Valid but implementation-specific C++ 2003 code that relies on errno being the same across threads may change behavior in this revision of C++.