[MacPorts] #57742: cairo @1.16.0 +quartz+universal+x11: cannot upgrade from @1.14.12 to @1.16.0

[MacPorts]

#57742: cairo @1.16.0 +quartz+universal+x11: cannot upgrade from @1.14.12 to
@1.16.0
---------------------------+------------------------
  Reporter:  hugo-ribeiro  |      Owner:  ryandesign
      Type:  defect        |     Status:  closed
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.5.4
Resolution:  fixed         |   Keywords:  xcode10
      Port:  cairo         |
---------------------------+------------------------

Comment (by kencu):

 Jim, the cctools and ld64 ports both offer variants that just send
 everything to xcode. Newer systems are meant to use those variants, but
 what is a newer system is a moving target.

 On 10.13, you should now be using the ld64 and cctools versions that
 MacPorts supplies (as they are newer than the Xcode that came with 10.13).

 But back when you first installed ld64 and cctools, the default variant
 was xcode; now it is not (should not be). But -- we don't have a simple
 way to bump you automatically up to the new preferred variants, so that is
 our failing. There is another ticket about that back in the 4000 series.

-- 
Ticket URL: <https://trac.macports.org/ticket/57742#comment:17>
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