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

[MacPorts]

#38279: rust @0.5: multiple issues
---------------------+--------------------------------
 Reporter:  egall@…  |      Owner:  macports-tickets@…
     Type:  defect   |     Status:  new
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:  2.1.3
 Keywords:           |       Port:  rust
---------------------+--------------------------------
 1. Rust currently doesn't work on 10.5 and lower:
 https://github.com/mozilla/rust/issues/4232

  Something like the following could be added to fix this:
 {{{
 pre-fetch {
     if {${os.platform} == "darwin" && ${os.major} < 10} {
         ui_error "${name} only works with OS X 10.6 Snow Leopard or
 later."
         return -code error "incompatible OS X version"
     }
 }
 }}}

 2. Rust does not support universal binaries:
 https://github.com/mozilla/rust/issues/2024

  Something like the following could be added to fix this:
 {{{
 supported_archs     i386 x86_64
 universal_variant   no
 }}}

 3. Rust's configure script doesn't recognize the `--disable-dependency-
 tracking` flag. This could be solve by either removing the universal
 variant as per !#2 above, or by adding something like this to the
 portfile:
 {{{
 configure.universal_args-delete --disable-dependency-tracking
 }}}

 4. Seeing as Rust basically builds its own copy of llvm, it should use the
 same dependencies as llvm (i.e. `libffi`, `llvm_select`, and `perl5`).

 5. Besides the dependencies listed in !#4 above, it should also include
 the dependencies listed in the [http://static.rust-
 lang.org/doc/0.5/tutorial.html#getting-started Rust Language Tutorial],
 i.e. it should:

  - blacklist gcc versions lower than 4.4, and clang versions lower than 3
  - depend on either python26 or python27 (maybe just python_select as a
 placeholder)
  - use `build.type gnu` and depend on gmake
  - depend on curl

-- 
Ticket URL: <https://trac.macports.org/ticket/38279>
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