[MacPorts] #69198: rust-bootstrap needs a lot of disk space to build

[MacPorts]

#69198: rust-bootstrap needs a lot of disk space to build
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  Reporter:  ryandesign      |      Owner:  MarcusCalhoun-Lopez
      Type:  defect          |     Status:  assigned
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:  2.9.0
Resolution:                  |   Keywords:
      Port:  rust-bootstrap  |
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Comment (by ryandesign):

 Replying to [comment:1 MarcusCalhoun-Lopez]:
 > It is built ''three'' different times, once for x86_64 and twice for
 i686 (since Rust considers this cross-compilation).

 Why twice for i386?

 > * Attempt to clean the directories after every architecture build. At
 least there would only be two builds of LLVM to deal with.

 This is the kind of thing I was talking about.

 > * Try to create a separate LLVM port specifically for Rust. I do not
 know if this would make things easier or harder (more steps but more
 control over the LLVM build).

 If rust is building its own private copy of llvm every time, yes, putting
 it in another port or subport could make a lot of sense. Maybe there are
 times when you are making a change to the port that only affects the
 private llvm, or only rust, so you could revbump just that subport and not
 have to rebuild the other part.

 And, why can't they use our existing llvm ports like everyone else?

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Ticket URL: <https://trac.macports.org/ticket/69198#comment:5>
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