Cross compile to ppc fails

[TuxThePenguin0]

I have been trying to get rust to cross-compile from an x86 system to a ppc32 host/target but the build process errors out in the stage1 phase.
My experience is fairly limited but it looks like it might be trying to use x86 headers for a ppc compile?

Meta

Version being built is 1.60.0 through the Alpine Linux aports repo and using abuild

Error

Copying stage1 std from stage1 (i586-alpine-linux-musl -> i586-alpine-linux-musl / i586-alpine-linux-musl)
Building stage1 compiler artifacts (i586-alpine-linux-musl -> powerpc-alpine-linux-musl)
   Compiling libc v0.2.116
   Compiling proc-macro2 v1.0.30
   ...
   Compiling gimli v0.26.1
   Compiling tracing v0.1.29
error: Error relocating /home/tux/aports/community/rust/src/rustc-1.60.0-src/build/i586-alpine-linux-musl/stage1-rustc/release/deps/libtracing_attributes-a36eb84df63ddcba.so: __mulodi4: symbol not found
   --> /home/tux/aports/community/rust/src/rustc-1.60.0-src/vendor/tracing-0.1.29/src/lib.rs:913:9
    |
913 | pub use tracing_attributes::instrument;
    |         ^^^^^^^^^^^^^^^^^^

error: could not compile `tracing` due to previous error
warning: build failed, waiting for other jobs to finish...
error: build failed

[compiler-errors]

but it looks like it might be trying to use x86 headers for a ppc compile?

tracing_attributes is a proc-macro, so it should be compiling for the host architecture.

[TuxThePenguin0]

I tried again with rust 1.61.0 and got pretty much the exact same error

Error

Copying stage1 std from stage1 (i586-alpine-linux-musl -> i586-alpine-linux-musl / i586-alpine-linux-musl)
Building stage1 compiler artifacts (i586-alpine-linux-musl -> powerpc-alpine-linux-musl)
   Compiling proc-macro2 v1.0.30
   Compiling libc v0.2.116
   ...
   Compiling rustc_macros v0.1.0 (/home/tux/aports/community/rust/src/rustc-1.61.0-src/compiler/rustc_macros)
   Compiling chalk-derive v0.80.0
   Compiling tracing v0.1.29
error: Error relocating /home/tux/aports/community/rust/src/rustc-1.61.0-src/build/i586-alpine-linux-musl/stage1-rustc/release/deps/libtracing_attributes-77686163bd4c6e7a.so: __mulodi4: symbol not found
   --> /home/tux/aports/community/rust/src/rustc-1.61.0-src/vendor/tracing-0.1.29/src/lib.rs:913:9
    |
913 | pub use tracing_attributes::instrument;
    |         ^^^^^^^^^^^^^^^^^^

   Compiling chalk-ir v0.80.0
error: could not compile `tracing` due to previous error
warning: build failed, waiting for other jobs to finish...
error: Error relocating /home/tux/aports/community/rust/src/rustc-1.61.0-src/build/i586-alpine-linux-musl/stage1-rustc/release/deps/libchalk_derive-1dc68cf7ceee1d83.so: __mulodi4: symbol not found
  --> /home/tux/aports/community/rust/src/rustc-1.61.0-src/vendor/chalk-ir-0.80.0/src/lib.rs:13:5
   |
13 | use chalk_derive::{Fold, HasInterner, SuperVisit, Visit, Zip};
   |     ^^^^^^^^^^^^

[compiler-errors]

does the compiler let you build itself? like not targeting ppc32, but the host architecture?

[TuxThePenguin0]

Yes rust builds fine when targeting the host architecture

[Enselic]

Triage: Is this still a problem? If yes, can you please share exactly what commands you use to build? Start from a vanilla docker image of a widely used distro. Thanks!