[PATCH] [lld] [ELF] Support for general dynamic TLS relocations on X86_64

[kledzik at apple.com]

I guess I was not clear.  I did not mean where does the *definition* of tls_get_addr come from.  I was asking where does the *undefine* for tls_get_addr come from?  If that undefine is "weak", that tells the linker that if no definition is found, to assume it was in some DSO. Seems like that is what you are special casing tls_get_addr to do.

http://reviews.llvm.org/D5505