An illumos mold shim, intended to be called by cargo to link Rust programs:

[target.x86_64-unknown-illumos]
linker = "/opt/ooce/bin/clang"
rustflags = ["-C", "link-arg=--ld-path=/home/james/mold_shim/target/release/mold_shim", "-C", "save-temps"]

You can also use LD_ALTEXEC:

LD_ALTEXEC=/home/james/mold_shim/target/release/mold_shim cargo build --verbose

Note you need https://github.com/luqmana/mold/tree/illumos to fix a dlopen related bug.

It can output to /tmp/args "invoked" when called, and "passing" with list of args that it calls mold with. Uncomment the std::fs::write lines in src/main.rs!

Combined with save-temps, it allows one to rerun failing commands while making changes.

Make sure to change the hard coded /home/james paths! If mold is installed to something PATH can see, then an absolute path isn't required.