[Pkg-rust-maintainers] Upstream has changed the bootstrap process

[Ximin Luo]

Angus Lees:
> Thanks Ximin!  I've been poking at it myself over the last few nights, and
> got to roughly where you are.  The big outstanding issue for me is
> verifying that we can (re)build with the same release, since this will
> require a different path into the build system (aiui).  I think I know how
> this needs to work, but I'm only now at the point where I can actually try
> it :/

I just built 1.10.0 by bootstrapping from 1.9.0. Then I installed this 1.10.0 and tried to build the same version again by bootstrapping from itself. This is what I got:

$ dpkg-buildpackage -b
[..]
CFG_LLVM_LINKAGE_FILE=/media/xda1/data/infinity0/tmp/rust/rebuild/rustc-1.10.0+dfsg1/x86_64-unknown-linux-gnu/rt/llvmdeps.rs LD_LIBRARY_PATH=/media/xda1/data/infinity0/tmp/rust/rebuild/rustc-1.10.0+dfsg1/x86_64-unknown-linux-gnu/stage0/lib:/usr/lib/llvm-3.7/lib:$LD_LIBRARY_PATH   x86_64-unknown-linux-gnu/stage0/bin/rustc --cfg stage0 -C link-args=-Wl,-z,relro -O --cfg rtopt -C rpath -C prefer-dynamic -C no-stack-check --target=x86_64-unknown-linux-gnu   -L "x86_64-unknown-linux-gnu/rt" -L native="/usr/lib/llvm-3.7/lib"     --out-dir x86_64-unknown-linux-gnu/stage0/lib/rustlib/x86_64-unknown-linux-gnu/lib -C extra-filename=-e8edd0fd -C metadata=e8edd0fd src/libcore/lib.rs
src/libcore/lib.rs:63:1: 63:37 error: #[feature] may not be used on the stable release channel
src/libcore/lib.rs:63 #![feature(allow_internal_unstable)]
                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[..]
etc more errors like the above
[..]
dpkg-buildpackage: error: debian/rules build gave error exit status 2
2

which sounds like the problem I ran into a few emails ago. There is something called a "bootstrap key" that lets you "unlock" unstable features of a particular compiler, so we would have to do something with this - see my earlier email for more details.

But do you think it's really necessary to block the upload because of this?

X

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