[MacPorts] #71293: mpich-clang-1[3-7] fail to build on 10.6 x86_64

[MacPorts]

#71293: mpich-clang-1[3-7] fail to build on 10.6 x86_64
-------------------------+----------------------
 Reporter:  jmroot       |      Owner:  eborisch
     Type:  defect       |     Status:  assigned
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:  snowleopard  |       Port:  mpich
-------------------------+----------------------
 *
 https://build.macports.org/builders/ports-10.6_x86_64-builder/builds/221492
 *
 https://build.macports.org/builders/ports-10.6_x86_64-builder/builds/221278
 *
 https://build.macports.org/builders/ports-10.6_x86_64-builder/builds/221279
 *
 https://build.macports.org/builders/ports-10.6_x86_64-builder/builds/221280
 *
 https://build.macports.org/builders/ports-10.6_x86_64-builder/builds/221281

 Please mark as an unsupported platform if this can't be fixed before the
 next Portfile update, to avoid wasting hours of buildbot time.

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Ticket URL: <https://trac.macports.org/ticket/71293>
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