K 10 svn:author V 3 dim K 8 svn:date V 27 2011-11-19T18:01:14.424477Z K 7 svn:log V 279 Pull in r144505 from upstream clang trunk: Fix the signature of the getcontext builtin, eliminating incorrect warnings about its prototype. This also adds a -W(no-)builtin-requires-header option, which can be used to enable or disable warnings of this kind. MFC after: 1 week END