jemalloc (jemallocator) C toolchain / compilation issues

[dpc]

Describe the bug

It seems like Rust tikv-jemalloc-sys crate fails on compilation of vendored C jemalloc code,
but only on NixOS, only with newer C toolchains and only when optimizations are NOT enabled.

The developers investigating it point out to odd behavior of the toolchains suggesting some misconfiguration/misbehavior. I have been experiencing it with clang, some other user with gcc, but both of us are on NixOS, and problem doesn't repro on other distros as far as we can tell.

Steps To Reproduce

Compile a Rust project using tikv-jemalloc crate in debug mode on NixOS.

Expected behavior

It should compile.

Screenshots

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Additional context

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[jr1221]

It looks like systemd carries a patch to build on musl, could be related:

nixpkgs/pkgs/os-specific/linux/systemd/default.nix

Line 261 in 9a1c989

(musl-patches + "/0012-distinguish-XSI-compliant-strerror_r-from-GNU-specif.patch")

[bkchr]

#370498 this looks related.