[MacPorts] #57444: Most ports failing on Mojave

[MacPorts]

#57444: Most ports failing on Mojave
---------------------+----------------------
 Reporter:  FGasper  |      Owner:  (none)
     Type:  defect   |     Status:  new
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:  2.5.4
 Keywords:  mojave   |       Port:  libiconv
---------------------+----------------------
 Almost all of my outdated ports fail to upgrade with messages like this:

 {{{
 felipe at Felipes-MacBook-Pro 09:30:58 /opt/local/var/macports
 > sudo port upgrade libiconv
 Error: libiconv cannot be installed for the configured universal_archs
 'x86_64 i386' because it only supports the arch(s) ''.
 Error: Follow https://guide.macports.org/#project.tickets to report a bug.

 ERROR 1
 felipe at Felipes-MacBook-Pro 09:31:24 /opt/local/var/macports
 > sudo port upgrade zsh
 Error: libiconv cannot be installed for the configured universal_archs
 'x86_64 i386' because it only supports the arch(s) ''.
 Error: Follow https://guide.macports.org/#project.tickets to report a bug.

 ERROR 1
 felipe at Felipes-MacBook-Pro 09:32:37 /opt/local/var/macports
 > sudo port upgrade zlib
 Error: libiconv cannot be installed for the configured universal_archs
 'x86_64 i386' because it only supports the arch(s) ''.
 Error: Follow https://guide.macports.org/#project.tickets to report a bug.
 }}}

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Ticket URL: <https://trac.macports.org/ticket/57444>
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