Unable to build dylib with mimalloc as global_allocator

[lblasc]

In version 0.1.25 mimalloc_rust switched from cmake build to cc which caused multiple definition errors to start showing up when linker is invoked on dylib, before that change everything worked fine. Building directly with cargo works.

I'm unable to see how switching to cc caused this..

Steps to reproduce:

Cargo.toml

[package]
name = "test"
version = "1.0.0"
edition = "2018"

[dependencies]
mimalloc = { version = "0.1.25", default-features = false, features = ["local_dynamic_tls"] }

[lib]
name = "test"
crate-type = ["dylib"]

src/lib.rs

use mimalloc::MiMalloc;

#[global_allocator]
static GLOBAL: MiMalloc = MiMalloc;

Steps to reproduce:

$ ls
./Cargo.toml ./src ./src/lib.rs
$ cargo b
    Updating crates.io index
   Compiling cc v1.0.67
   Compiling libmimalloc-sys v0.1.21
   Compiling mimalloc v0.1.25
   Compiling test v1.0.0 (/tmp/test)
    Finished dev [unoptimized + debuginfo] target(s) in 3.26s
$ crate2nix generate
Generated ./Cargo.nix successfully.
$ nix-build Cargo.nix
....
          /nix/store/rqfgki7ck1bxqhk3hd7wziqhahjadfbj-binutils-2.35.1/bin/ld: /build/rustcW9muz5/libmimalloc-4622a22cce.rlib(stats.o): in function `_mi_clock_now':
          (.text._mi_clock_now+0x0): multiple definition of `_mi_clock_now'; /nix/store/jxiaz4bvswyh3sncrp3g59mgailf9818-rust_libmimalloc-sys-0.1.21-lib/lib/libmimalloc-sys.out/libmimalloc.a(stats.o):(.text._mi_clock_now+0x0): first defined here
          /nix/store/rqfgki7ck1bxqhk3hd7wziqhahjadfbj-binutils-2.35.1/bin/ld: /build/rustcW9muz5/libmimalloc-4622a22cce.rlib(stats.o): in function `_mi_clock_start':
          (.text._mi_clock_start+0x0): multiple definition of `_mi_clock_start'; /nix/store/jxiaz4bvswyh3sncrp3g59mgailf9818-rust_libmimalloc-sys-0.1.21-lib/lib/libmimalloc-sys.out/libmimalloc.a(stats.o):(.text._mi_clock_start+0x0): first defined here
          /nix/store/rqfgki7ck1bxqhk3hd7wziqhahjadfbj-binutils-2.35.1/bin/ld: /build/rustcW9muz5/libmimalloc-4622a22cce.rlib(stats.o): in function `mi_stats_reset':
          (.text.mi_stats_reset+0x0): multiple definition of `mi_stats_reset'; /nix/store/jxiaz4bvswyh3sncrp3g59mgailf9818-rust_libmimalloc-sys-0.1.21-lib/lib/libmimalloc-sys.out/libmimalloc.a(stats.o):(.text.mi_stats_reset+0x0): first defined here
          /nix/store/rqfgki7ck1bxqhk3hd7wziqhahjadfbj-binutils-2.35.1/bin/ld: /build/rustcW9muz5/libmimalloc-4622a22cce.rlib(stats.o): in function `_mi_clock_end':
          (.text._mi_clock_end+0x0): multiple definition of `_mi_clock_end'; /nix/store/jxiaz4bvswyh3sncrp3g59mgailf9818-rust_libmimalloc-sys-0.1.21-lib/lib/libmimalloc-sys.out/libmimalloc.a(stats.o):(.text._mi_clock_end+0x0): first defined here
          /nix/store/rqfgki7ck1bxqhk3hd7wziqhahjadfbj-binutils-2.35.1/bin/ld: /build/rustcW9muz5/libmimalloc-4622a22cce.rlib(stats.o): in function `mi_stats_print_out':
          (.text.mi_stats_print_out+0x0): multiple definition of `mi_stats_print_out'; /nix/store/jxiaz4bvswyh3sncrp3g59mgailf9818-rust_libmimalloc-sys-0.1.21-lib/lib/libmimalloc-sys.out/libmimalloc.a(stats.o):(.text.mi_stats_print_out+0x0): first defined here
          /nix/store/rqfgki7ck1bxqhk3hd7wziqhahjadfbj-binutils-2.35.1/bin/ld: /build/rustcW9muz5/libmimalloc-4622a22cce.rlib(stats.o): in function `mi_stats_print':
          (.text.mi_stats_print+0x0): multiple definition of `mi_stats_print'; /nix/store/jxiaz4bvswyh3sncrp3g59mgailf9818-rust_libmimalloc-sys-0.1.21-lib/lib/libmimalloc-sys.out/libmimalloc.a(stats.o):(.text.mi_stats_print+0x0): first defined here
          /nix/store/rqfgki7ck1bxqhk3hd7wziqhahjadfbj-binutils-2.35.1/bin/ld: /build/rustcW9muz5/libmimalloc-4622a22cce.rlib(stats.o): in function `mi_thread_stats_print_out':
          (.text.mi_thread_stats_print_out+0x0): multiple definition of `mi_thread_stats_print_out'; /nix/store/jxiaz4bvswyh3sncrp3g59mgailf9818-rust_libmimalloc-sys-0.1.21-lib/lib/libmimalloc-sys.out/libmimalloc.a(stats.o):(.text.mi_thread_stats_print_out+0x0): first defined here
          /nix/store/rqfgki7ck1bxqhk3hd7wziqhahjadfbj-binutils-2.35.1/bin/ld: /build/rustcW9muz5/libmimalloc-4622a22cce.rlib(stats.o): in function `mi_process_info':
          (.text.mi_process_info+0x0): multiple definition of `mi_process_info'; /nix/store/jxiaz4bvswyh3sncrp3g59mgailf9818-rust_libmimalloc-sys-0.1.21-lib/lib/libmimalloc-sys.out/libmimalloc.a(stats.o):(.text.mi_process_info+0x0): first defined here
          collect2: error: ld returned 1 exit status


error: aborting due to previous error

builder for '/nix/store/qab9lrvvamv4is8ifsv78hyyqgxjiyil-rust_test-1.0.0.drv' failed with exit code 1
cannot build derivation '/nix/store/nnvpkcv16cgrsa69xxlamf4wraqq0rfp-all-workspace-members.drv': 1 dependencies couldn't be built
error: build of '/nix/store/nnvpkcv16cgrsa69xxlamf4wraqq0rfp-all-workspace-members.drv' failed

Thanks!