[MacPorts] #55200: gmp @6.1.2 configure: error: cannot find output from flex; giving up

[MacPorts]

#55200: gmp @6.1.2 configure: error: cannot find output from flex; giving up
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  Reporter:  stefan-c-kremer  |      Owner:  MarcusCalhoun-Lopez
      Type:  defect           |     Status:  assigned
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:
Resolution:                   |   Keywords:
      Port:  gmp              |
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Comment (by ryandesign):

 Replying to [ticket:55200 stefan-c-kremer]:
 > {{{
 > 1022  :info:configure checking lex output file root... configure: error:
 cannot find output from flex; giving up
 > }}}

 Someone else reported the same flex error when configuring gdbm; see
 #55152.

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Ticket URL: <https://trac.macports.org/ticket/55200#comment:13>
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