Linking error on Rust 1.70 aarch64-unknown-linux-musl toolchain

[geauxvirtual]

I have a project that currently compiles and links with Rust 1.67 on the following toolchains:

• x86_64-unknown-linux-musl (built in rust:1.67-alpine3.17)
• aarch64-unknown-linux-musl (built in rust:1.67-alpine3.17)
• aarch64-apple-darwin

The project successfully builds with all three toolchains for Rust 1.69.

I was attempting to build the project with Rust 1.70. The project compiles successfully on the following toolchains:

• x86_64-unknown-linux-musl (built in rust:1.70-alpine.3.17 and rust:1.70-alpine3.18)
• aarch64-apple-darwin

The project fails to compile and link on the following toolchain:

• aarch64-unknown-linux-musl (fails in rust:1.70-alpine3.17 and rust:1.70-alpine3.18)

I've been trying to track down which dependency of the project could be causing the following errors to be thrown since the project has no specific hardware requirements, but I also wanted to open an issue since this is failing for one specific toolchain starting with 1.70.

Building with --verbose does not yield any additional information. This occurs for both debug and release builds.

error: linking with `cc` failed: exit status: 1
= note: /usr/lib/gcc/aarch64-alpine-linux-musl/12.2.1/../../../../aarch64-alpine-linux-musl/bin/ld: GFp_armcap_P: undefined version:
        /usr/lib/gcc/aarch64-alpine-linux-musl/12.2.1/../../../../aarch64-alpine-linux-musl/bin/ld: failed to set dynamic section sizes: bad value
        collect2: error: ld returned 1 exit status

[saethlin]

I think this is another manifestation of whatever is causing #111888

The root cause predates my alignment checks PR, but the non-unwinding panics that I added provoke it more often.

[apiraino]

WG-prioritization assigning priority (Zulip discussion) and nominating for T-compiler meeting to try getting more eyes on this class of linkage error we're experiencing since 1.70

@rustbot label -I-prioritize +P-high I-compiler-nominated +T-compiler

[pnkfelix]

I've carved out some time for this today and tomorrow.

[apiraino]

Discussed in T-compiler triage meeting on Zulip (notes).

@rustbot label -I-compiler-nominated