[MacPorts] #56482: py-protobuf3: Use cxx11 1.1 portgroup

[MacPorts]

#56482: py-protobuf3: Use cxx11 1.1 portgroup
---------------------------+--------------------
  Reporter:  ryandesign    |      Owner:  kencu
      Type:  defect        |     Status:  closed
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:  fixed         |   Keywords:
      Port:  py-protobuf3  |
---------------------------+--------------------
Changes (by kencu):

 * status:  assigned => closed
 * resolution:   => fixed


Comment:

 In [changeset:"5cb3bb12990f7ea682e4b964eb86269923521397/macports-ports"
 5cb3bb12990f7ea682e4b964eb86269923521397/macports-ports] (master):
 {{{
 #!ConfigurableCommitTicketReference repository="macports-ports"
 revision="5cb3bb12990f7ea682e4b964eb86269923521397"
 py-protobuf3: fix build on older systems

 add cxx11 1.1 PG
 add -stdlib flag to clang builds
 add needed CXX flag to systems without thread_local
 closes: https://trac.macports.org/ticket/56482
 }}}

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Ticket URL: <https://trac.macports.org/ticket/56482#comment:3>
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