Nightly libcore
Rust's core library as a cargo crate. Updated daily using nighli.es.
It has a disable_float feature that includes thepowersgang's float-free libcore patch.
Cross compiling
Note: This works only for targets with "no-compiler-rt": true.
Copy your your-target-name.json file into the cloned folder and run:
cargo build --release --features disable_float --target=your-target-name
If you want to build it with float support, just omit the cargo feature.
Then put the resulting target/your-target-name/release/libcore.rlib in your Rust lib folder. For multirust, that folder is:
~/.multirust/toolchains/nightly/lib/rustlib/your-target-name/lib
Now it should be possible to compile no_std crates for your-target-name. Note that ./your-target-name and your-target-name are different targets to Rust.