support +1 2017-04-09 8:17 GMT+08:00 Neil Conway <neil.con...@gmail.com>:
> XCode < 8 does not support the C++11 `thread_local` construct. As a > result, we added a workaround to use `__thread` on OSX and > `thread_local` on other platforms: > > https://reviews.apache.org/r/36845/ > > Since that workaround was added, XCode 8 has been released (in > September 2016) with support for `thread_local`. > > If we required XCode >= 8.0 for building Mesos, we could remove this > workaround and use `thread_local` on all platforms. This would have > some advantages, such as: > > (1) More uniform, standards-compliant code between OSX and other platforms. > > (2) `thread_local` supports a few features that `__thread` does not, > such as support for non-POD data types. > > Therefore, I'd like to propose we make XCode 8 a requirement for > building Mesos on OSX, and then get rid of the `THREAD_LOCAL` > workaround. Since XCode 8.0 requires OSX 10.11.5, this would also > imply dropping support for OSX 10.10. > > Feedback welcome. > > Neil > -- Deshi Xiao Twitter: xds2000 E-mail: xiaods(AT)gmail.com
