On Thursday, March 17, 2016 at 4:31:46 PM UTC-4, Henri Sivonen wrote:
> On Thu, Mar 17, 2016 at 3:01 PM, Martin Stransky wrote:
> > Well, what about other arches? ppc(64), s390, ai64...?
>
> All architectures currently supported by Fedora, Debian and Ubuntu
> (but not Gentoo!) already have LLVM back ends. rustc hasn't been
> ported to all those architectures, but the level of effort required
> should be within reason considering that the LLVM back ends are there
> and rustc has already been ported to target multiple ones of the
> LLVM-supported ISAs.
Gentoo does have system LLVM support on x86{,_64} ppc{,64} arm{,64} and sparc
-- no alpha, hppa or ia64 at of yet. The rust situation on gentoo is still in
flux however. Gentoo is very much going to support cross-compilation of rust
and rust-based projects too.
Regarding other platforms -- as of firefox-45.0 , the only platforms that work
properly are those that have a jit, or have appropriate none-jit
AtomicOperations.h .. Since moz45 the only commits i've seen have been to add
ppc/ppc64 support (in moz47), so as far as I am aware hppa, s390, ia64, etc are
effectively not supported at runtime already (they MOZ_CRASH on startup).
Regardless of whether or not those platforms have rust support, some work in
js/src/jit/ is going to be required before it'll matter.
> If distro policy bans ongoing cross-compliation, I guess the distro
> would need to replicate the Rust project's compiler compilation
> version lineage on each architecture after bootstrapping with
> cross-compilation.
>
Technically speaking, as i've been told at least, rust can still be built from
scratch if ocaml is available on the platform, starting with rust-0.6, to 0.7,
0.8, 0.9, 1.0 and then finally 1.7 or newer. If a distro really does ban
cross-compiling to jump directly to rust-1.7 or newer then their developers can
stoll go this route to package it. Theoretically it only needs to be done
once, right?
Ian
-----
Ian Stakenvicius
[email protected]
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