[MacPorts] #56957: attempt to create ccachedir conditionally

[MacPorts]

#56957: attempt to create ccachedir conditionally
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 Reporter:  RJVB         |      Owner:  (none)
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  base         |    Version:
 Keywords:  haspatch     |       Port:
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 I don't see the point of creating the ccache directory unconditionally
 without checking if it doesn't already exist - and thus obliging to
 perform the configure step with root privileges.

 The attached patch checks first if elevating privileges and attempting the
 creation is required.

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Ticket URL: <https://trac.macports.org/ticket/56957>
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