[MacPorts] #55200: gmp @6.1.2 configure: error: cannot find output from flex; giving up (was: sudo port install gmp)

[MacPorts]

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

 * owner:   => MarcusCalhoun-Lopez
 * status:  new => assigned
 * port:   => gmp


Old description:

> --->  Configuring gmp
> Error: Failed to configure gmp, consult
> /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_gmp/gmp/work/gmp-6.1.2/config.log
> Error: Failed to configure gmp: configure failure: command execution
> failed
> Error: See
> /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_gmp/gmp/main.log
> for details.
> Error: Follow https://guide.macports.org/#project.tickets to report a
> bug.
> Error: Processing of port gmp failed

New description:

 {{{
 --->  Configuring gmp
 Error: Failed to configure gmp, consult
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_gmp/gmp/work/gmp-6.1.2/config.log
 Error: Failed to configure gmp: configure failure: command execution
 failed
 Error: See
 /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_gmp/gmp/main.log
 for details.
 }}}

 {{{
 1020    :info:configure checking for bison... bison -y
 1021    :info:configure checking for flex... flex
 1022    :info:configure checking lex output file root... configure: error:
 cannot find output from flex; giving up
 1023    :info:configure Command failed:  cd
 "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_gmp/gmp/work/gmp-6.1.2"
 && ./configure --prefix=/opt/local --enable-cxx
 1024    :info:configure Exit code: 1
 }}}

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Ticket URL: <https://trac.macports.org/ticket/55200#comment:3>
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