Dan Burkert has posted comments on this change.

Change subject: [thirdparty] Avoid building tsan on macOS on specific dep builds
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Patch Set 1:

OK I was misremembering - ASAN has always worked on macOS (at least as far back 
as when I ported Kudu to macOS), but it has always had false positives.

TSAN has never worked, and the compiler would error if you passed 
-fsanitize=thread.  However, as of late last year apple announced TSAN support 
in XCode 8, so it seems they have been working on it.  The clang version in 
thirdparty (3.9.1) no longer errors when passed -fsanitize=thread (at least on 
OS X 10.10), which is heartening.  I'm going to try and get tsan working on 
Kudu.

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Gerrit-MessageType: comment
Gerrit-Change-Id: I9c105274f26bb185cdaae6c046536011445f19a1
Gerrit-PatchSet: 1
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: David Ribeiro Alves <dral...@apache.org>
Gerrit-Reviewer: Adar Dembo <a...@cloudera.com>
Gerrit-Reviewer: Dan Burkert <danburk...@apache.org>
Gerrit-Reviewer: Jean-Daniel Cryans <jdcry...@apache.org>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Todd Lipcon <t...@apache.org>
Gerrit-HasComments: No

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