[MacPorts] #61396: rust @1.47.0: fails to build on Big Sur

[MacPorts]

#61396: rust @1.47.0: fails to build on Big Sur
-------------------------+--------------------
  Reporter:  5nefarious  |      Owner:  (none)
      Type:  defect      |     Status:  closed
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.6.99
Resolution:  invalid     |   Keywords:  bigsur
      Port:  rust        |
-------------------------+--------------------

Comment (by ryandesign):

 I wasn't expecting to see that.

 As far as I can determine, the only mention of "qt" anywhere in the
 portfiles that llvm-9.0 depends on is in the cmake portfile, which has
 optional qt support in a variant:

 {{{
 $ port variants cmake
 cmake has the variants:
    docs: Build documentation: HTML and manpages
    gui: Build Qt-based cmake-gui
    python35: Build documentation using Sphinx from Python 3.5
      * conflicts with python36 python37 python38
      * requires docs
    python36: Build documentation using Sphinx from Python 3.6
      * conflicts with python35 python37 python38
      * requires docs
    python37: Build documentation using Sphinx from Python 3.7
      * conflicts with python35 python36 python38
      * requires docs
    python38: Build documentation using Sphinx from Python 3.8
      * conflicts with python35 python36 python37
      * requires docs
    qt4: Build Qt GUI using Qt4
      * conflicts with qt5
      * requires gui
    qt5: Build Qt GUI using Qt5
      * conflicts with qt4
      * requires gui
    universal: Build for multiple architectures
 }}}

 Have you installed cmake with the gui variant? If so, try reinstalling it
 without that variant.

-- 
Ticket URL: <https://trac.macports.org/ticket/61396#comment:13>
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