rust @0.5: build process downloads compiler for bootstrapping

[larryv (Lawrence Velázquez)]

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?

[g5pw (Aljaž Srebrnič)]

Yeah, I think I could be able to coerce the build process into using downloaded distfiles.

[g5pw (Aljaž Srebrnič)]

Ok, got it to work using distfiles. The thing is, we need two distfiles, one for i686 and one for x86_64. Should we download both and then use the appropriate one? Is there something similar to "platform darwin {}" but for archs?

[larryv (Lawrence Velázquez)]

Replying to g5pw@…:

Ok, got it to work using distfiles. The thing is, we need two distfiles, one for i686 and one for x86_64. Should we download both and then use the appropriate one? Is there something similar to "platform darwin {}" but for archs?

Yeah, you can use “platform darwin i386” and “platform darwin x86_64”.

​http://guide.macports.org/chunked/reference.variants.html#reference.variants.platform

It’s probably best to use distfiles-append in each platform block to add whichever bootstrap distfile is required. This way only the necessary one is downloaded.

[g5pw (Aljaž Srebrnič)]

I got this working, see ​here. There's still a small issue (segmentation fault) but I think it's unrelated.

[cooljeanius (Eric Gallager)]

Cc Me!

[larryv (Lawrence Velázquez)]

Fixed in r104052.