[cfe-dev] __thread support in Clang

[Anatol Pomozov]

Hi,

I am trying to port a program from Linux to macosx. The program uses
several features one of them is Thread-Local Storage. It uses __thread
GCC attribute for this.

The program compiles fine on Linux i386 but fails on macosx
10.6.4/clang2.8 with following error: "error: thread-local storage is
unsupported for the current target"

My question is: what is the status of this feature? Are you going to
implement it any time soon? If not - what is the best alternative of
TLS on macosx/clang?

This issue a little bit confusing as the LLVM2.0 release note [1]
states that "A number of ELF features are now supported by LLVM,
including ... Thread Local Storage (TLS) with the __thread keyword"


[1] http://llvm.org/releases/2.0/docs/ReleaseNotes.html