[MacPorts] #49423: Octave configure can't find Qt libraries in El Capitan

[MacPorts]

#49423: Octave configure can't find Qt libraries in El Capitan
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 Reporter:  hartman.jonathan2@…  |      Owner:  macports-tickets@…
     Type:  defect               |     Status:  new
 Priority:  Normal               |  Milestone:
Component:  ports                |    Version:  2.3.4
 Keywords:                       |       Port:
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 I've got Qt 4 installed via macports and most other ports that require it
 as a dependancy (including KDE) have no problem finding the Qt 4 libraries
 and successfully linking against them to build. However, when installing
 Octave, the +gui variant also requires Qt 4 as a dependancy and detects
 that it is installed but the gui won't build and Octave will install
 without the gui even if you use the +gui variant. Digging deeper, I found
 that the reason was that the problem occurs during the configure stage
 where Octave's configure script cannot find the the Qt libraries and thus
 disables the gui build, even though the configure of other applications
 do. The configure log contains the warning "WARNING: Qt libraries not
 found -- disabling GUI". I've attached the entire log

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Ticket URL: <https://trac.macports.org/ticket/49423>
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