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QUICKSTART.md

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Building the project

Download the project

Clone the repo using this command:

git clone [email protected]:FractalFir/rustc_codegen_clr.git

Instal the newest nightly rust

rustup install nightly

Check that the project is complatible with the version of Rust you installed.

cargo check

If the project does not compile due to error messages, try updating your rust version.

rustup update

If this does not solve the problem, open an issue. The project is only compatible with a narrow set of rustc versions, and tries to always use the newest nigthly build.

Install the .NET runtime

This project requires the .NET runtime to be used. You can find instalation instructions here.

After installing .NET, run dotnet --info to confoirm it is installed propely.

Install ilasm

Windows

ilasm comes installed with Visual Studio. So, you propably already have it. If not, install visual stuido.

Linux or MacOS

This tool supports both the "Core" and "Mono" flavours of ILASM. While you can install / build ilasm separeately, installing the mono runtime is the easiest option.

Checking the dependencies

After you installed dotnet and ilasm, run cargo run --bin rustflags to check if you installed ilasm and dotnet correctly. This program will check your enviroment, build the project, and print the flags you need to use it.

Running tests

As one last step, you can run cargo test ::stable to check if the codegen runs as expected. This can take a minute or two, but it should ensure the project is working as expected.

Using the project

The project is relatively simple to use. You will still have to do some setup to get core and std working, but it is a straigtforward process.

At the root of your crate, create a directory named .cargo. In this directory, create a file named config.toml, with the following contents.

[build] 
target = "x86_64-unknown-linux-gnu" # Change to the host target.
[unstable]
build-std = ["core","alloc","std","panic_abort"]

Then, run the codegen utility rustflags again, by running cargo --bin rustflags --release in the directory rustc_codegen_clr.

It should provide you with the commands necesary for enabling the codegen. They should look something like this:

On Linux:

export RUSTFLAGS="-Z codegen-backend=/home/USER/rustc_codegen_clr/target/release/librustc_codegen_clr.so -C linker=/home/USER/rustc_codegen_clr/target/release/linker -C link-args=--cargo-support "

On Windows:

$Env:RUSTFLAGS = '-Z codegen-backend=C:\Users\USER\rustc_codegen_clr\target\release\librustc_codegen_clr.dll -C linker=\Users\USER\rustc_codegen_clr\target\release\linker.exe -C link-args=--cargo-support '

You can then run this command in your shell session (aka. command prompt window). This command will enable the codegen for that session(command prompt window) only! The project makes no pernament changes to your instaltation, and simply closing the shell session(command prompt window) will disable it.

After this, simply run cargo run to compile & run your app inside the .NET runtime. Other cargo commands should work to. There may be quite a few error / warning messages dispalyed, but they will not stop compilation.

NOTE: the project currently does not support any proc-macros, due to techincal liminations. Supporting them is possible, but it is currently more effort than it is worth.