Toolchain 'aarch64-unknown-linux-gnu' does not come with cc for official Docker Image.

[simbleau]

I'm trying to build a docker image for a Raspberry Pi 4 which uses Trunk to build a web page.

Pretty common use-case, right? I would think so. It doesn't build on Arm64v8 architecture and fails to find cc.

I checked /usr/local/rustup/toolchains/1.60.0-aarch64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-gnu/bin and confirmed cc does not exist, but gcc/g++ is installed.

Here was my Dockerfile:

FROM rust as builder
RUN rustup target add wasm32-unknown-unknown
RUN cargo install trunk # <--- BUILD FAILS HERE
RUN trunk build

I expected this small example to build.

Instead:

note: Error while loading /usr/local/rustup/toolchains/1.60.0-aarch64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-gnu/bin/cc: No such file or directory
#0 183.5           
#0 183.5 
#0 187.1 error: failed to compile `trunk v0.14.0`, intermediate artifacts can be found at `/tmp/cargo-installzc7X1O`
#0 187.1 
#0 187.1 Caused by:
#0 187.1   build failed

Meta

rustc --version --verbose:

#6 [3/6] RUN rustc --version --verbose
#6 1.773 rustc 1.60.0 (7737e0b5c 2022-04-04)
#6 1.773 binary: rustc
#6 1.773 commit-hash: 7737e0b5c4103216d6fd8cf941b7ab9bdbaace7c
#6 1.773 commit-date: 2022-04-04
#6 1.773 host: aarch64-unknown-linux-gnu
#6 1.773 release: 1.60.0
#6 1.773 LLVM version: 14.0.0

[itaylor]

I had this issue (missing cc) happen to me when trying to cross compile for an M1 Mac from an X86 machine. I was able to fix it by switching the docker buildx builder to use the multiarch/qemu-user-static as described here: docker/buildx#495 (comment). For me, I think the issue is that the arm64 builder that comes out of the box with buildx has incorrect/different paths. You might be experiencing something similar with the WASM builder and arm64?

[Enselic]

Triage: Thanks for reporting! But I'm pretty sure no cc is ever distributed by Rust, so the problem must be somewhere else. In other words, I don't think this is a Rust bug. Feel free to re-open if you can prove or strongly indicate that this is a Rust bug.