[MacPorts] #63061: qt5: librecad build fails: could not resolve SDK Path for 'macosx10.11'

[MacPorts]

#63061: qt5: librecad build fails: could not resolve SDK Path for 'macosx10.11'
---------------------+---------------------------------
 Reporter:  mascguy  |      Owner:  MarcusCalhoun-Lopez
     Type:  defect   |     Status:  assigned
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:
 Keywords:           |       Port:  qt5
---------------------+---------------------------------
 LibreCAD and LibreCAD-devel both fail to build on our macOS 10.11
 buildbots, with the following error:

 {{{
 DEBUG: system:  cd
 "/opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_cad_LibreCAD/LibreCAD/work/LibreCAD-2.1.3"
 && /opt/local/libexec/qt5/bin/qmake PREFIX=/opt/local
 CONFIG+="build_muparser" -spec macx-clang
 Project ERROR: Could not resolve SDK Path for 'macosx10.11' using --show-
 sdk-path
 Command failed:  cd
 "/opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_cad_LibreCAD/LibreCAD/work/LibreCAD-2.1.3"
 && /opt/local/libexec/qt5/bin/qmake PREFIX=/opt/local
 CONFIG+="build_muparser" -spec macx-clang
 Exit code: 3
 }}}

 One example:

 https://build.macports.org/builders/ports-10.11_x86_64-builder/builds/143618/steps
 /install-port/logs/stdio

 This is similar to what we've seen (and fixed) before, but it's not clear
 why it's happening again:

 issue:54044 - Could not resolve SDK Path for 'macosx10.11'

-- 
Ticket URL: <https://trac.macports.org/ticket/63061>
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