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).
http://reviews.llvm.org/D17950
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