Rust helloworld app

[BVRazvan]

Add rs-hello directory:

• Makefile: builds the application
• Makefile.uk: includes the app's object file
• Cargo.lock, Cargo.toml, cargo/config.toml, src/main.rs: rust app configuration
• setup: creates workdir
• gitignore: ignores generated files

Linked to #26

[StefanJum]

Hi @BVRazvan, thanks for this. You will need to follow the examples (e.g. nginx), and have the default .cfg files in the directory.
Did you manage to run the application using make menuconfig, make and then qemu? If so, you can just copy the generated config files, if not, then that should be the first step, try to make it run locally for you, then copy the files here.

[BVRazvan]

Yes, I ran the app using the steps you have mentioned. Regarding .cfg files for xen/fc, I didn't think that it would be still the case to add them as long as in the catalog repo it is mentioned that only qemu/x86_64 is supported for now.
I did a new commit just so you can see the .config generated.

[StefanJum]

Yes, I ran the app using the steps you have mentioned. Regarding .cfg files for xen/fc, I didn't think that it would be still the case to add them as long as in the catalog repo it is mentioned that only qemu/x86_64 is supported for now. I did a new commit just so you can see the .config generated.

It's fine, you can leave the fc/xen files out. Can you please share a list of commands that you are using to build the application? I'm running C=$(pwd)/.config make -j 4 and I get this error:

*** No rule to make target '/projects/unikraft/catalog-core/rs-hello/target/x86_64-unknown-none/debug/deps/rs_hello-822b00486649cf34.o', needed by '/projects/unikraft/catalog-core/rs-hello/workdir/build/apprshello.ld.o'.  Stop.

Where does the filename in the Makefile.uk file comes from?

[BVRazvan]

Yeah, I forgot to mention the compilation command; this is cargo rustc -- --emit=obj (the file in the Makefile.uk is the .o generated).
Next on, you can use the command you have provided for building the app .
In the end, run the app using qemu; for example:qemu-system-x86_64 -nographic -kernel workdir/build/rs-hello_qemu-x86_64.
These steps will be mentioned in a README file.

[StefanJum]

Ah, works fine now. Please mention this in the README, and also add it to the build and run scripts when you create them. Thanks.

[StefanJum]

See the comment and please squash the commits, there should be only one (signed-off) commit. Looks good besides that.

[StefanJum]

I get an error here

error: toolchain 'stable-x86_64-unknown-linux-gnu' is not installed

[BVRazvan]

Hmm, can you paste here your output of rustup show command in cli?

[StefanJum]

Default host: x86_64-unknown-linux-gnu
rustup home:  /home/stefan/.rustup

installed targets for active toolchain
--------------------------------------

x86_64-unknown-linux-gnu
x86_64-unknown-none

active toolchain
----------------

nightly-x86_64-unknown-linux-gnu (default)
rustc 1.87.0-nightly (aa8f0fd71 2025-03-23)

[BVRazvan]

Ok, so you did a custom installation probably, otherwise stable channel is default (I will explicitly mention it in the readme file) .
As a side note, I matched your toolchain (on local as well as on a vanilla ubuntu image) and it seems that the stable channel gets installed automatically, but I won't take it for granted.
I will squash the commits when everything is fine.

[BVRazvan]

Hi, @StefanJum. Did you manage to run the app after my last commit?