[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:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.5.4
Resolution:                |   Keywords:  xcode10
      Port:  cairo         |
---------------------------+------------------------
Changes (by ryandesign):

 * keywords:   => xcode10
 * owner:  (none) => ryandesign
 * status:  new => assigned
 * cc: ryandesign (removed)


Comment:

 I didn't see this problem on my High Sierra system nor did the buildbot
 builder, but they're both using Xcode 9 and I see you're using Xcode 10.

 This error message occurs when unexpected warnings are emitted while
 trying to detect pthread support. See
 https://gitlab.freedesktop.org/cairo/cairo/issues/121. Maybe Xcode 10's
 clang includes new warnings.

 I see you're building universal and the problem is only occurring in the
 i386 part. Could you attach the config.log from the i386 build directory?

 Xcode 10 only includes the 10.14 SDK, which removes support for building
 32-bit. I don't see the SDK being used in the log, but maybe that's still
 somehow relevant. Do you have the command line tools installed? If not, do
 that.

-- 
Ticket URL: <https://trac.macports.org/ticket/57742#comment:1>
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