[beta] Rollup backports - #64438

Merged

bors merged 11 commits into

rust-lang:betafrom

cuviper:beta-rollup

Sep 14, 2019

Commits on Sep 13, 2019

Permit unwinding through FFI by default

Mark-Simulacrum
authored and
cuviper
committed
Revert "Allow a dirty MirBuilt for make_extern and make_method_extern"
cuviper
committed
Force #[unwind(aborts)] in test/codegen/c-variadic.rs
cuviper
committed
pprust: Do not print spaces before some tokens

petrochenkov
authored and
cuviper
committed
Account for doc comments coming from proc macros without spans

estebank
authored and
cuviper
committed
add regression test

estebank
authored and
cuviper
committed
Support "soft" feature-gating using a lint

petrochenkov
authored and
cuviper
committed
Turn `soft_unstable` into a future-compatibility lint

petrochenkov
authored and
cuviper
committed
Update xLTO compatibility table in rustc book.

michaelwoerister
authored and
cuviper
committed
Include compiler-rt in the source tarball

maurer
authored and
cuviper
committed
Update LLVM submodule

nikic
authored and
cuviper
committed