[MacPorts] #57092: wxgtk-3.0: build fails on 10.12 (shared-ld: unhandled option '-stdlib=libc++') (was: wxgtk-3.0 build fails on 10.12)

[MacPorts]

#57092: wxgtk-3.0: build fails on 10.12 (shared-ld: unhandled option
'-stdlib=libc++')
------------------------+----------------------
  Reporter:  jwhowse4   |      Owner:  mojca
      Type:  defect     |     Status:  assigned
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:
      Port:  wxgtk-3.0  |
------------------------+----------------------
Changes (by mojca):

 * status:  new => assigned
 * cc: mojca@… (removed)
 * version:  2.5.3 =>
 * owner:  (none) => mojca


Old description:

> On MacOS 10.12.6 with XCode 9.2, the build for wxgtk-3.0 fails with the
> errors in the attacked log file.  Any suggestions for a fix?

New description:

 On MacOS 10.12.6 with XCode 9.2, the build for wxgtk-3.0 fails with the
 errors in the attacked log file.

 {{{
 /path/to/wxgtk-3.0/work/wxWidgets-3.0.4/build/shared-ld-sh -bundle
 -headerpad_max_install_names -o webkit2_extu30.bundle
 webkit2_ext_webview_webkit2_extension.o  -L/opt/macports/lib
 -Wl,-headerpad_max_install_names -stdlib=libc++ -arch x86_64
 -L/opt/macports/lib  -framework IOKit -framework CoreServices -framework
 System -framework ApplicationServices   -L/opt/macports/lib
 -lwebkit2gtk-4.0 -lgtk-3 -lgdk-3 -lpangocairo-1.0 -lpango-1.0 -latk-1.0
 -lcairo-gobject -lcairo -lgdk_pixbuf-2.0 -lsoup-2.4 -lgio-2.0
 -lgobject-2.0 -ljavascriptcoregtk-4.0 -lglib-2.0 -lintl -Wl,-framework
 -Wl,CoreFoundation -lz -lpthread -liconv
 :info:build shared-ld: unhandled option '-stdlib=libc++'
 }}}

 Any suggestions for a fix?

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Ticket URL: <https://trac.macports.org/ticket/57092#comment:1>
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