[MacPorts] #55813: clhep: fails to build on legacy systems

[MacPorts]

#55813: clhep: fails to build on legacy systems
--------------------+-------------------
 Reporter:  mojca   |      Owner:  mojca
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  clhep
--------------------+-------------------
 * [https://build.macports.org/builders/ports-10.5_ppc_legacy-
 builder/builds/54232 10.5]
 * [https://build.macports.org/builders/ports-10.6_x86_64_legacy-
 builder/builds/55969 10.6]
 * [https://build.macports.org/builders/ports-10.7_x86_64_legacy-
 builder/builds/57185 10.7]
 * [https://build.macports.org/builders/ports-10.8_x86_64_legacy-
 builder/builds/51107 10.8]

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Ticket URL: <https://trac.macports.org/ticket/55813>
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