Mac issue

[varnerac]

I am new to Rust and experimenting with this plugin.

Environment
OS: macOS 11.1
Erlang: 22.0.7 (via asdf)
Rust: rustc 1.49.0 (e1884a8e3 2020-12-29)

When I run the CT suite I get:

% asdf local erlang 22.0.7
% rm -rf _build 
% DIAGNOSTICS=1 rebar3 ct                                      
===> Verifying dependencies...
===> Fetching cargo v0.1.2
===> Fetching jsx v2.11.0
===> Analyzing applications...
===> Compiling cargo
===> Compiling jsx
===> Analyzing applications...
===> Compiling rebar3_cargo
===> Running Common Test suites...
%%% rebar3_cargo_SUITE: 
%%% rebar3_cargo_SUITE ==> test_test_nif_app: FAILED
%%% rebar3_cargo_SUITE ==> {thrown,rebar_abort}

The rustc portion fails with:

Updating crates.io index
Compiling autocfg v1.0.1
Compiling libc v0.2.81
Compiling gimli v0.23.0
Compiling adler v0.2.3
Compiling cfg-if v1.0.0
Compiling proc-macro2 v0.4.30
Compiling rustc-demangle v0.1.18
Compiling object v0.22.0
Compiling unicode-xid v0.1.0
Compiling syn v0.15.44
Compiling unicode-segmentation v1.7.1
Compiling rustler_sys v2.1.0
Compiling void v1.0.2
Compiling lazy_static v1.4.0
Compiling unreachable v1.0.0
Compiling miniz_oxide v0.4.3
Compiling heck v0.3.2
Compiling quote v0.6.13
Compiling addr2line v0.14.1
Compiling backtrace v0.3.55
Compiling rustler_codegen v0.21.1
Compiling failure v0.1.8
Compiling which v2.0.1
Compiling rustler v0.21.1
Compiling nifsys v0.0.2 (/Users/varnerac/rebar3_cargo/_build/test/logs/ct_run.nonode@nohost.2020-12-31_11.40.42/rebar3_cargo.ct.logs/run.2020-12-31_11.40.42/log_private/test_nif_app/rust_src/nifsys)

dyld: lazy symbol binding failed: Symbol not found: __ZN5alloc3vec12Vec$LT$T$GT$3new17h54bac6e7732ce9a4E

Referenced from: /Users/varnerac/rebar3_cargo/_build/test/logs/ct_run.nonode@nohost.2020-12-31_11.40.42/rebar3_cargo.ct.logs/run.2020-12-31_11.40.42/log_private/test_nif_app/_build/prod/lib/test_nif_app/target/release/deps/librustler_codegen-38dcfb2200be0555.dylib

Expected in: flat namespace

dyld: Symbol not found: __ZN5alloc3vec12Vec$LT$T$GT$3new17h54bac6e7732ce9a4E

Referenced from: /Users/varnerac/rebar3_cargo/_build/test/logs/ct_run.nonode@nohost.2020-12-31_11.40.42/rebar3_cargo.ct.logs/run.2020-12-31_11.40.42/log_private/test_nif_app/_build/prod/lib/test_nif_app/target/release/deps/librustler_codegen-38dcfb2200be0555.dylib

Expected in: flat namespace

error: could not compile `nifsys`

Caused by:
process didn't exit successfully: `rustc --crate-name nifsys rust_src/nifsys/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,diagnostic-short --crate-type dylib --emit=dep-info,link -C opt-level=3 -C embed-bitcode=no -C metadata=aa6455da133a77ec --out-dir '/Users/varnerac/rebar3_cargo/_build/test/logs/ct_run.nonode@nohost.2020-12-31_11.40.42/rebar3_cargo.ct.logs/run.2020-12-31_11.40.42/log_private/test_nif_app/_build/prod/lib/test_nif_app/target/release/deps' -L 'dependency=/Users/varnerac/rebar3_cargo/_build/test/logs/ct_run.nonode@nohost.2020-12-31_11.40.42/rebar3_cargo.ct.logs/run.2020-12-31_11.40.42/log_private/test_nif_app/_build/prod/lib/test_nif_app/target/release/deps' --extern 'lazy_static=/Users/varnerac/rebar3_cargo/_build/test/logs/ct_run.nonode@nohost.2020-12-31_11.40.42/rebar3_cargo.ct.logs/run.2020-12-31_11.40.42/log_private/test_nif_app/_build/prod/lib/test_nif_app/target/release/deps/liblazy_static-3bf6fd78efb7d92b.rlib' --extern 'rustler=/Users/varnerac/rebar3_cargo/_build/test/logs/ct_run.nonode@nohost.2020-12-31_11.40.42/rebar3_cargo.ct.logs/run.2020-12-31_11.40.42/log_private/test_nif_app/_build/prod/lib/test_nif_app/target/release/deps/librustler-74884604a7aa9a89.rlib' --codegen link-arg=-flat_namespace --codegen link-arg=-undefined --codegen link-arg=suppress` (signal: 6, SIGABRT: process abort signal)

Is there some requisite I'm missing?

[varnerac]

In the meantime, I'll test rustler-codegen out and see if that shines some light on this.

[varnerac]

My work in progress PR to add macOS 11.0 CI here reproduces the issue.