[MacPorts] #66620: libosinfo does not build on 10.6 (both x86 and ppc)

[MacPorts]

#66620: libosinfo does not build on 10.6 (both x86 and ppc)
---------------------------+-------------------------
  Reporter:  barracuda156  |      Owner:  danchr
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.8.0
Resolution:                |   Keywords:  snowleopard
      Port:  libosinfo     |
---------------------------+-------------------------

Comment (by kencu):

 many ports (perhaps all) that use gir scanner need this block added to
 make gir scanner use the right compiler

 https://github.com/macports/macports-
 ports/blob/cafe968c1952a98b0912c5b84f922c5d0cf7590a/gnome/at-
 spi2-core/Portfile#L45

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Ticket URL: <https://trac.macports.org/ticket/66620#comment:3>
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