On 2016-10-08, at 10:03 PM, Stephen J. Butler wrote:
> FYI, it's in the Xcode 8 release notes:
>
> https://developer.apple.com/library/content/releasenotes/DeveloperTools/RN-Xcode/Introduction.html
>
> I did a quick test file and it seems to compile with Apple clang. No clue on
> compatibility issues though.
>
Thanks!
> Thanks for finding and sharing that information. It sounds like you could get
> TLS by using MacPorts clang instead of Xcode clang, but that it will be
> incompatible with whatever TLS implementation Apple eventually creates.
I had hoped it would be in the macports-clang-3.7 build I'm using, but it seems
to error out.
However, I noticed this bit in the the libcxxabi port
libcxxabi-3.7.0.src/include/cxxabi.h
#ifdef __linux__
// Linux TLS support. Not yet an official part of the Itanium ABI.
//
https://sourceware.org/glibc/wiki/Destructor%20support%20for%20thread_local%20variables
extern int __cxa_thread_atexit(void (*)(void *), void *, void *) throw();
#endif
and - if I open up that guard, it actually builds cleanly on MacOSX.
I wonder if TLS support was just disabled on all but Linux...perhaps I'll try
installing this new version I just built and see what happens. --- after I back
everything up :>
Ken
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