jfb added inline comments. ================ Comment at: lib/Frontend/InitPreprocessor.cpp:480 @@ +479,3 @@ + if (LangOpts.CPlusPlus1z) { + Builder.defineMacro("__cpp_lib_atomic_is_always_lock_free", "201603"); + } ---------------- jfb wrote: > How do you pick these numbers before the standard is actually out? 201603 is > the Jacksonville meeting, seems fine to me :) Those come from a separate SG10 paper: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0096r1.html#recs.cpp17 A number hasn't been published yet, I'll update the number once the post-Jacksonville mailing is out (I sent Clark a ping).
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