[MacPorts] #58925: octave +fltk @5.1.0_1 build failure: ld: framework not found OpenGL

[MacPorts]

#58925: octave +fltk @5.1.0_1 build failure: ld: framework not found OpenGL
---------------------+---------------------------------
  Reporter:  prbuen  |      Owner:  MarcusCalhoun-Lopez
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  octave  |
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Comment (by MarcusCalhoun-Lopez):

 You seem to have a system configuration that is not quite the norm, so we
 have to figure out which aspect is causing the problem.

 The issues seems to be that -isysroot and -syslibroot were never added to
 [https://github.com/macports/macports-
 base/blob/917106a32748fccfd1190e88aa867d1eb417b371/src/port1.0/portconfigure.tcl#L885
 compiler/linker flags].\\
 The only way I can see that not happening is if
 [https://github.com/macports/macports-
 base/blob/917106a32748fccfd1190e88aa867d1eb417b371/src/port1.0/portconfigure.tcl#L415
 /usr/include exists] but does not have the system headers installed.\\
 Is that possible?

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Ticket URL: <https://trac.macports.org/ticket/58925#comment:3>
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