[MacPorts] #54151: qjackctl @0.45+qt4: variant +qt4 fails to build on Sierra

[MacPorts]

#54151: qjackctl @0.45+qt4: variant +qt4 fails to build on Sierra
-----------------------+-------------------
  Reporter:  detlevd   |      Owner:
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.4.1
Resolution:            |   Keywords:
      Port:  qjackctl  |
-----------------------+-------------------

Comment (by detlevd):

 OK, it is a problem in the guts of qmake and qt4-mac, but
 https://trac.macports.org/changeset/73290 gives a good hint how to work
 around it. I stripped that solution down to what is needed for the
 qjackctl port. It works this way on my Sierra system and im confident it
 won't hurt others. But please check on different configurations. I'll
 attach the Portfile diff, it simply adds
 {{{
 post-configure { # work around strange qmake problem if not universal, see
 https://trac.macports.org/ticket/54151#comment:6
     if {![variant_isset universal]} {
         system "cd ${worksrcpath}     && PATH=${qt_bins_dir}:$env(PATH)
 qmake -o qjackctl.mak qjackctl.pro"
         system "cd ${worksrcpath}/src && PATH=${qt_bins_dir}:$env(PATH)
 qmake -o qjackctl.mak src.pro"
         reinplace "s at -arch *-Xarch_x86_64 at -Xarch_x86_64@"
 ${worksrcpath}/src/qjackctl.mak
     }
 }
 }}}

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Ticket URL: <https://trac.macports.org/ticket/54151#comment:8>
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