Ben Langmuir d5c333b731 Use gethostuuid() on Mac to identify hosts for LockFileManager
The hostname can be very unstable when there are many machines on the
network competing for the same name. Using the hardware UUID makes it
less likely to have collisions or to consider files written by the
current host to be owned by a different one at a later time.

rdar://problem/21512307

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241005 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-29 21:47:44 +00:00
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