Add note about thread_local

5 years ago · 019b82ca34
parent 69a91b82e1
commit 019b82ca34
1 changed files with 2 additions and 0 deletions
--- a/doc/core/moving-to-c++.md
+++ b/doc/core/moving-to-c++.md
@ -33,6 +33,8 @@ C++ compatible with
 - This would limit us not to use modern C++11 standard library such as `filesystem`. 
  You can easily see whether PR is free from this issue by checking the result of
  `Artifact Build Linux` test.
+- `thread_local` is not allowed to use on Apple's products because their old OSes
+  (e.g. ios < 9.0) don't support `thread_local`.

 ## Roadmap