iOS natively supports thread-locals

Joakim via digitalmars-d-ldc digitalmars-d-ldc at
Sat Jun 18 20:23:22 PDT 2016

On Sunday, 19 June 2016 at 02:40:51 UTC, Dan Olson wrote:
> Good news!  I just did a simple LDC test of thread locals using 
> vanilla LLVM 3.8.0 and Xcode 3.7.1.  Targeted both arm64 
> (iPhone 6) and armv7 (older iPad mini) running iOS 9.3.2.  This 
> paves the way for ditching my modified LLVM.
> Was there an Apple announcement about this?
> I am not sure when this came about.  It snuck in sometime 
> between Jan 2016 and the LLVM 3.8.0 release in early March.  I 
> noticed when trying to cherry-pick my thread-local changes 
> today into a 3.8.0 release and there was conflict.  Looking at 
> the code, there it was, TLS support.
> I think device needs to be running at least iOS 9.0 for armv7 
> and 8.0 for arm64.  Doesn't work yet in iOS Simulator for 
> 32-bit though.

Looks like this commit, ARM-only for now:

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