[MacPorts] #56177: octave-control: adds non-existing folders to -L and fails to build

[MacPorts]

#56177: octave-control: adds non-existing folders to -L and fails to build
------------------------------------------+-------------------------
  Reporter:  mojca                        |      Owner:  Schamschula
      Type:  defect                       |     Status:  new
  Priority:  Normal                       |  Milestone:
 Component:  ports                        |    Version:
Resolution:                               |   Keywords:
      Port:  octave-devel octave-control  |
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Comment (by mojca):

 We have:
 {{{
 > port provides /opt/local/lib/gcc7/libgfortran.4.dylib
 /opt/local/lib/gcc7/libgfortran.4.dylib is provided by: gcc7
 > port provides /opt/local/lib/libgcc/libgfortran.4.dylib
 /opt/local/lib/libgcc/libgfortran.4.dylib is provided by: libgcc
 }}}
 I would be grateful to know the difference.

 As far as `/opt/local/lib/gcc7/gcc/x86_64-apple-darwin17/7.2.0` is
 concerned: why do we even have such a strange path? I figured out that
 there's indeed
 {{{
 /opt/local/lib/gcc7/gcc/x86_64-apple-darwin17/7.3.0/
 }}}
 present on my machine (but that's 7.3.0 rather than 7.2.0). What's that
 doing there? Those files belong to `gcc7`.

--
Ticket URL: <https://trac.macports.org/ticket/56177#comment:4>
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