[MacPorts] #55875: octave-control @3.0.0: ld: library not found for -lgfortran (was: Build failure for octave-control)

[MacPorts]

#55875: octave-control @3.0.0: ld: library not found for -lgfortran
-----------------------------+-------------------------
  Reporter:  ATL-Flaneur     |      Owner:  Schamschula
      Type:  defect          |     Status:  assigned
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:  2.4.2
Resolution:                  |   Keywords:
      Port:  octave-control  |
-----------------------------+-------------------------

Comment (by ryandesign):

 I do not believe that the qt59 error message is relevant. It might be
 another symptom of the erroneous error message display discussed in
 #55560.

 Rather, the real error seems to be:

 {{{
 :info:configure ld: warning: directory not found for option
 '-L/opt/local/lib/gcc7/gcc/x86_64-apple-darwin17/7.2.0'
 :info:configure ld: warning: directory not found for option
 '-L/opt/local/lib/gcc7/gcc/x86_64-apple-darwin17/7.2.0/../../..'
 :info:configure ld: library not found for -lgfortran
 :info:configure clang: error: linker command failed with exit code 1 (use
 -v to see invocation)
 }}}

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Ticket URL: <https://trac.macports.org/ticket/55875#comment:2>
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