[MacPorts] #41362: calc-2.12.4.3 fails compiling

[MacPorts]

#41362: calc-2.12.4.3 fails compiling
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  Reporter:  hamid.ohadi@…  |      Owner:  macports-tickets@…
      Type:  defect         |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.2.1
Resolution:                 |   Keywords:
      Port:  calc           |
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Comment (by ryandesign@…):

 Ok, same error: `unknown type name 'size_t'`. `size_t` should be defined
 by the standard headers, which makes me wonder if you perhaps don't have
 them installed. Does the directory /usr/include exist? If not, install the
 command line tools by running `xcode-select --install`

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Ticket URL: <https://trac.macports.org/ticket/41362#comment:4>
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