Hahnfeld added a comment.

I'm getting "multiple definition" errors on powerpc64le when linking the unit 
tests, for example `XRayBufferQueueTest`:

  src/projects/compiler-rt/lib/xray/xray_utils.cc:34: multiple definition of 
`__xray::retryingWriteAll(int, char*, char*)'
  src/projects/compiler-rt/lib/xray/xray_utils.cc:73: multiple definition of 
`__xray::readValueFromFile(char const*, long long*)'
  src/projects/compiler-rt/lib/xray/xray_utils.cc:95: multiple definition of 
`__xray::getLogFD()'

to name a few of the errors.

(related note: Why aren't the unit tests rebuilt if the 
`libclang_rt.xray-powerpc64le.a` changes?!? After reverting this commit locally 
for testing, the unit test built just fine. After reapplying the test wasn't 
rebuilt and I saw no problems...)


https://reviews.llvm.org/D39114



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