[MacPorts] #53074: clhep @2.3.4.3: fails to build on 10.6 due to unsupported thread-local storage

[MacPorts]

#53074: clhep @2.3.4.3: fails to build on 10.6 due to unsupported thread-local
storage
---------------------+-------------------------
  Reporter:  mojca   |      Owner:  mojca
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:  snowleopard
      Port:  clhep   |
---------------------+-------------------------

Comment (by kencu):

 Some modifications to clang-5.0 now allow `thread_local` storage on 10.6
 (and lower, most likely), so this port now builds without trouble using
 clang-5.0 with those modifications:
 {{{
 h$ port -v installed clhep
 The following ports are currently installed:
   clhep @2.4.0.1_0 (active) platform='darwin 10' archs='x86_64'
 date='2018-02-16T21:57:55-0800'
 }}}

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Ticket URL: <https://trac.macports.org/ticket/53074#comment:1>
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