K 10
svn:author
V 8
dumbbell
K 8
svn:date
V 27
2017-06-17T14:44:30.200235Z
K 7
svn:log
V 955
lang/rust: Enable on FreeBSD/aarch64 + various fixes

This port now uses an unofficial bootstrap of Rust 1.17.0 and Cargo
0.18.0 for FreeBSD/aarch64. Here are my notes to create this boostrap:
https://gist.github.com/dumbbell/b587da50ef014078da9e732a4331ebad

The port's Makefile was changed to:
    - allow to override the versions and directories of the bootstrap
      archives;
    - patch the bootstrap script and manifest with those
      versions/directories.

Beside changes to support FreeBSD/aarch64, the port received the
following fixes:
    - Pass python path to the configure script.
    - Fix and simplify the extraction of rust-std bootstrap by re-using
      existing variables.
    - Make sure tar(1) doesn't produce sparse file entries when it
      recreates the rust-std bootstrap because Python 2's tarfile module
      doesn't support them (PR 219842).

PR:		216143, 219842
Differential Revision:	https://reviews.freebsd.org/D10857

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