Bill Wendling 95cae88bcf Use the Itanium ABI for thread_local on Darwin. ...

After some discussion, it was decided to use the Itanium ABI for thread_local on
Darwin OS X platforms. This involved a couple of changes. First, we use
"_tlv_atexit" instead of "__cxa_thread_atexit". Secondly, the global variables
are marked with 'internal' linkage, because we want all access to be calls to
the Itanium-specific entry point, which has normal linkage.
<rdar://problem/13733006>

llvm-svn: 180941

2013-05-02 19:18:03 +00:00

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