[MacPorts] #60927: inkscape 0.92.5_2 +x11: build failure

[MacPorts]

#60927: inkscape 0.92.5_2 +x11: build failure
---------------------------+--------------------
  Reporter:  joel-coffman  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.6.3
Resolution:                |   Keywords:
      Port:  inkscape      |
---------------------------+--------------------

Comment (by kencu):

 In the portfile, we're forcing it to {{{-std=c++11}}}:

 {{{
 platform darwin {
     if {[string match "*clang*" ${configure.compiler}]} {
         if {${configure.cxx_stdlib} eq "libstdc++"} {
             configure.cxxflags-append -std=c++98
         } else {
             configure.cxxflags-append -std=c++11
         }
     }
 }
 }}}

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Ticket URL: <https://trac.macports.org/ticket/60927#comment:2>
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