Static Builds Using MUSL Target Fail

[sempervictus]

When using the following to build:

  pacman -Sy rustup --noconfirm
  TC="nightly-2019-12-05"
  rustup install "$TC"
  rustup target add x86_64-unknown-linux-musl --toolchain="$TC"
  rustup component add rustc-dev --target=x86_64-unknown-linux-musl --toolchain="$TC"

the rustc_macros crate cannot be found:

   Compiling rand_jitter v0.1.4
error[E0463]: can't find crate for `rustc_macros` which `rustc` depends on
 --> c2rust-ast-builder/src/lib.rs:2:1
  |
2 | extern crate rustc;
  | ^^^^^^^^^^^^^^^^^^^ can't find crate

error: aborting due to previous error

For more information about this error, try `rustc --explain E0463`.
error: could not compile `c2rust-ast-builder`.

This is all on Arch Linux x86_64

[okias]

rust-nightly-x86_64-unknown-linux-gnu.tar.xz + rustc-dev.
nightly-date: 2021-01-24

I can confirm similar error when building https://github.com/servo/servo/ .

error[E0463]: can't find crate for `rustc_macros` which `rustc_ast` depends on
  --> components/script_plugins/lib.rs:22:1
   |
22 | extern crate rustc_ast;
   | ^^^^^^^^^^^^^^^^^^^^^^^ can't find crate

My first though after reading this issue is to downgrade to older version. Maybe it's rust issue.

EDIT: are u sure it's nightly 2019-12-05 not 2020-12-05 ? Ok nevermind, I noticed c2rust howto.

[sempervictus]

Given that i'm using that 2019 version and relevant toochain, what am i doing wrong? Someone else noted that it doesnt compile on Arch as is since i filed this, so hoping to make it static to avoid the whole rolling release concern around brittle builds.

[thedataking]

Musl is not supported because of issue #243. It appears that the issue has been fixed in a May 2020 toolchain but alas we are on a December 2019 toolchain (until we find time to roll it forward).

[okias]

My issue was likely unrelated, since it was caused by flatpak stripping or spliting and compressing debug stuff from rustc-dev .

[fw-immunant]

This should be fixed by our recent upgrades (away from using rustc crates in the transpiler, and supporting compiling with rustc 1.58 stable, nightly-2021-11-22, or later).

[sempervictus]

Thank you @fw-immunant - will try to get a build run to verify

[kkysen]

I believe all of c2rust('s default features) and most of its dependencies build fine on musl, but I'm seeing issues with *-sys crates (such as openssl-sys and libz-sys) and needing a cross-compiling pkg-config. I'll see if I can statically compile with musl once I figure those issues out.

[kkysen]

#243 is fixed now, so it should compile on musl. It's just the *-sys crates are finicky when cross-compiling.

[kkysen]

Closing as the *-sys crates issues cross-compiling aren't related to c2rust and should work when not cross-compiling.