[MacPorts] #38279: rust @0.5: multiple issues

[MacPorts]

#38279: rust @0.5: multiple issues
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  Reporter:  egall@…  |      Owner:  g5pw@…
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.1.3
Resolution:           |   Keywords:
      Port:  rust     |
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Comment (by larryv@…):

 Replying to [comment:5 egall@…]:
 > Replying to [comment:3 larryv@…]:
 > > It builds its own copy of LLVM? Why? Can we make it use ours?
 >
 > I've been trying to get it to do that, but I've had no luck getting it
 to work that way so far...

 Ugh. That’s rather unfortunate.

 > > > - depend on either python26 or python27 (maybe just python_select as
 a placeholder)
 > >
 > > No. Pick one or the other.
 >
 > How about using variants?

 Using variants for a build dependency isn’t really appropriate. The
 simplest (and in my opinion, best) option is just to add a `port:python27`
 build dependency. If Aljaž wants, he could try testing for a recent-enough
 system Python before resorting to the dependency.

 > > > - use `build.type gnu` and depend on gmake
 > >
 > > A dependency is not necessary; OS X comes with GNU Make.
 >
 > What about on platforms other than OS X?

 This should be handled in base, like the
 [[source:tags/release_2_1_2/base/src/port1.0/portbuild.tcl#L63|BSD Make
 dependency]] is.

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Ticket URL: <https://trac.macports.org/ticket/38279#comment:6>
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