[MacPorts] #48434: blosc at 1.6.1 Build error - Undefined Symbols

[MacPorts]

#48434: blosc at 1.6.1 Build error - Undefined Symbols
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  Reporter:  manuel.schaich@…  |      Owner:  stromnov@…
      Type:  defect            |     Status:  new
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:  2.3.3
Resolution:                    |   Keywords:  ElCapitan
      Port:  blosc             |
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Comment (by ionic@…):

 Oh, more specifically... without C++11 support, it would fail at build
 time (as opposed to link time.)

 So it's probably not linking to `libc++`, which should be default on
 10.9+.

 This is why I suspect your toolchain is wonky.

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Ticket URL: <https://trac.macports.org/ticket/48434#comment:4>
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