[MacPorts] #38285: rust @0.5: build process downloads compiler for bootstrapping

[MacPorts]

#38285: rust @0.5: build process downloads compiler for bootstrapping
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 Reporter:  larryv@…  |      Owner:  g5pw@…
     Type:  defect    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:
 Keywords:            |       Port:  rust
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 As per http://static.rust-lang.org/doc/0.5/tutorial.html:

 > Since the Rust compiler is written in Rust, it must be built by
 > a precompiled "snapshot" version of itself (made in an earlier state
 > of development). As such, source builds require a connection to the
 > Internet, to fetch snapshots, and an OS that can execute the available
 > snapshot binaries.

 This doesn’t seem optimal; the build phase should not require Internet
 connectivity. Is there a way to work around this? Maybe by treating the
 snapshot compiler as a distfile?

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Ticket URL: <https://trac.macports.org/ticket/38285>
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