[MacPorts] #53415: glpk 4.61 does not build on Mac OS X 10.6.8, Snow Leopard, because "Reentrancy needs complier support for TLS"

[MacPorts]

#53415: glpk 4.61 does not build on Mac OS X 10.6.8, Snow Leopard, because
"Reentrancy needs complier support for TLS"
------------------------+-------------------------
  Reporter:  ballapete  |      Owner:
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:  snowleopard
      Port:  glpk       |
------------------------+-------------------------

Comment (by kencu):

 Don't forget, if you're going to mix software built with gcc5+ (which
 links against libstdc++ from libgcc) with software built with gcc-4.2
 (which links against the system's /usr/lib/libstdc++), you'll need to do
 the same trick Marcus is doing with the ABI-compatability trick with the
 cxx11 portgroup to make it compatible.

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Ticket URL: <https://trac.macports.org/ticket/53415#comment:11>
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