mold: fatal: unknown command line option: -arch

[therealjasonkenney]

I am trying to cross compile my rust code to x86_64-unknown-linux-musl
I have tried in .cargo/config.toml:

[target.x86_64-unknown-linux-musl]
linker="clang"
rustflags = ["-C", "linker=clang", "-C", "link-arg=--ld-path=/nix/store/fm5083fc4ylj6zyld7n1j270m8kx0q8i-mold-2.31.0/bin/mold", "-C", "target-feature=+crt-static", "-C", "link-arg=-v"]

But something somewhere is setting these flags. I tried using bash -l to isolate env pollution which helped remove -lconv from the lib list.

Not sure what I should do. (Currently using clang 16)

• Cargo command run by bash -l 'cargo build -p mtomd --release --target=x86_64-unknown-linux-musl'

rustc --crate-name mtomd --edition=2021 mtomd/src/main.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --diagnostic-width=134 --crate-type bin --emit=dep-info,link -C opt-level=3 -C embed-bitcode=no -C metadata=1cacddd9d05bd727 -C extra-filename=-1cacddd9d05bd727 --out-dir /Volumes/Navi/Users/lain/Developer/projects/ground-control/target/x86_64-unknown-linux-musl/release/deps --target x86_64-unknown-linux-musl -C linker=clang -L dependency=/Volumes/Navi/Users/lain/Developer/projects/ground-control/target/x86_64-unknown-linux-musl/release/deps -L dependency=/Volumes/Navi/Users/lain/Developer/projects/ground-control/target/release/deps --extern prost=/Volumes/Navi/Users/lain/Developer/projects/ground-control/target/x86_64-unknown-linux-musl/release/deps/libprost-a21df6e0ccc2cdb0.rlib --extern tokio=/Volumes/Navi/Users/lain/Developer/projects/ground-control/target/x86_64-unknown-linux-musl/release/deps/libtokio-8ab7d5b4685812a6.rlib --extern tonic=/Volumes/Navi/Users/lain/Developer/projects/ground-control/target/x86_64-unknown-linux-musl/release/deps/libtonic-f906c81e78292274.rlib -C linker=clang -C link-arg=--ld-path=/nix/store/fm5083fc4ylj6zyld7n1j270m8kx0q8i-mold-2.31.0/bin/mold -C target-feature=+crt-static -C link-arg=-v -L native=/Volumes/Navi/Users/lain/Developer/projects/ground-control/target/x86_64-unknown-linux-musl/release/build/ring-4294bf8dc348ad55/out`

This outputs the following mold command: ```
"/nix/store/fm5083fc4ylj6zyld7n1j270m8kx0q8i-mold-2.31.0/bin/mold" -demangle -lto_library /Library/Developer/CommandLineTools/usr/lib/libLTO.dylib -static -arch x86_64 -platform_version macos 10.12.0 14.2 ...

[rui314]

-demangle -lto_library /Library/Developer/CommandLineTools/usr/lib/libLTO.dylib -static -arch x86_64 -platform_version macos 10.12.0 14.2 ...

Those flags are for the macOS linker and not compatible with Linux linkers. It looks like you are trying to cross compile your program for macOS instead of for x86_64-unknown-linux-musl.