[MacPorts] #54365: eigen3 fails to configure on Sierra

[MacPorts]

#54365: eigen3 fails to configure on Sierra
------------------------+----------------------
  Reporter:  TimArnold  |      Owner:  eborisch
      Type:  defect     |     Status:  assigned
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:
      Port:  eigen3     |
------------------------+----------------------

Comment (by eborisch):

 Xcode 8.3.3 as well. I'm curious why you aren't getting the packages from
 the buildbot. You don't need +clang39 since you aren't doing +doc; if you
 drop it, it should get a package from the buildbot.

 In main.2.log, there are some other errors I don't see:

 {{{
 :info:configure CMake Warning at
 /opt/local/share/cmake-3.8/Modules/Platform/Darwin.cmake:170 (message):
 :info:configure   The SDK Library/Frameworks path
 :info:configure    //Library/Frameworks
 :info:configure   is not set up correctly on this system.  This is known
 to occur when
 :info:configure   installing Xcode 3.2.6:
 :info:configure    http://bugs.python.org/issue14018
 :info:configure   The problem may cause build errors that report missing
 system frameworks.
 :info:configure   Fix your SDK symlinks to resolve this issue and avoid
 this warning.
 :info:configure Call Stack (most recent call first):
 :info:configure
 /opt/local/share/cmake-3.8/Modules/CMakeSystemSpecificInformation.cmake:26
 (include)
 :info:configure   CMakeLists.txt:1 (project)
 }}}

 Also not sure what to make of that, especially when I can't reproduce.

--
Ticket URL: <https://trac.macports.org/ticket/54365#comment:15>
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