[MacPorts] #64730: julius-caesar-3 @1.7.0: Build failure on 10.6/10.7 (incorrect macosx-version-min)

[MacPorts]

#64730: julius-caesar-3 @1.7.0: Build failure on 10.6/10.7 (incorrect macosx-
version-min)
------------------------------+-----------------------------
 Reporter:  evanmiller        |      Owner:  herbygillot
     Type:  defect            |     Status:  assigned
 Priority:  Normal            |  Milestone:
Component:  ports             |    Version:  2.7.1
 Keywords:  lion snowleopard  |       Port:  julius-caesar-3
------------------------------+-----------------------------
 A couple of the build bots are failing:

 https://build.macports.org/builders/ports-10.7_x86_64-builder/builds/90158

 https://build.macports.org/builders/ports-10.6_x86_64-builder/builds/94015

 Best I can tell the `CMAKE_OSX_DEPLOYMENT_TARGET` variable is not being
 correctly set in CMakeCache.txt. It's not clear to me if this is an issue
 with the cmake PG, this port, or what.

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Ticket URL: <https://trac.macports.org/ticket/64730>
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