[MacPorts] #64088: cargo-c fails to build on 10.13

[MacPorts]

#64088: cargo-c fails to build on 10.13
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  Reporter:  bK4gYuRo  |      Owner:  MarcusCalhoun-Lopez
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.7.1
Resolution:            |   Keywords:  cargo-c
      Port:  cargo-c   |
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Comment (by mascguy):

 Replying to [comment:26 cjones051073]:
 > Please try with the above, which is the standard trick for mis-behaving
 build configurations like this.

 Thanks @cjones!

 I've also initiated rebuilds for `cargo-c` where necessary, on the
 buildbots.

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Ticket URL: <https://trac.macports.org/ticket/64088#comment:29>
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