[MacPorts] #59649: libxml2 fails to build on 10.13.4

[MacPorts]

#59649: libxml2 fails to build on 10.13.4
--------------------------+--------------------
  Reporter:  andregirard  |      Owner:  (none)
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.6.2
Resolution:               |   Keywords:
      Port:  libxml2      |
--------------------------+--------------------

Comment (by mf2k):

 Error is:
 {{{
 :info:configure dyld: Library not loaded:
 /opt/local/lib/libreadline.7.dylib
 :info:configure   Referenced from: /opt/local/bin/gawk
 :info:configure   Reason: image not found
 }}}

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Ticket URL: <https://trac.macports.org/ticket/59649#comment:3>
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