from-source gives: `libscip.so.9.0: cannot open shared object file: No such file or directory`

[jacobsvante]

Using the new feature from-source, available since 0.3.3, I'm unable to run the built binary. Here's my MRE:

Dockerfile:

FROM rust:1.77
WORKDIR /work
RUN apt-get update && apt-get install -y cmake clang
RUN wget https://github.com/scipopt/russcip/archive/refs/tags/v0.3.3.tar.gz \
    && tar -xzvf v0.3.3.tar.gz \
    && mv russcip-0.3.3 /russcip
WORKDIR /russcip
RUN cargo build --release -F from-source --example create_and_solve
CMD ["./target/release/examples/create_and_solve"]

Build:

docker build .

Run / error:

docker run -it --rm russcip-test:latest
./target/release/examples/create_and_solve: error while loading shared libraries: libscip.so.9.0: cannot open shared object file: No such file or directory

[mwien]

Same here. With cargo run it works, similar to the bundled feature.

Seems like the same difficulties with dynamic linking. Is it possible to add static linking now with from-source-building?

[mmghannam]

Sorry guys for the false hope 😄 but at least now the build process can be controlled from rust, so it's a small step in the right direction. Unfortunately, only setting SHARED=false is not enough, I will be iterating on it in this PR scipopt/scip-sys#15

[jacobsvante]

No worries, I'm just happy to see you working on it 😀

[mmghannam]

I think I found a nice solution that doesn't requires much work. I updated scip-sys (v0.1.12, and a corresponding russcip version 0.3.4 to use it) to also say where it found libscip. It sets the environment variable DEP_SCIP_LIBDIR. You could use that information to set the rpath of the binary you're building by adding something like this to your build script

fn main() {
    let libscip_dir = std::env::var("DEP_SCIP_LIBDIR").unwrap();
    println!("cargo:rustc-link-arg=-Wl,-rpath,{}", libscip_dir);
}

I think you might also need to add scip-sys to the dependencies of your crate not just russcip.
It's not probably the nicest solution since it requires a bit of effort from the downstream user of scip-sys but should do the job. @jacobsvante @mwien What do you think?

[mwien]

I think for the bundled feature with pre-built binary that cannot be statically linked it is likely the only way and a nice-to-have option 👍

Will test it out in the coming days.

I'm still gonna look into static linking because I probably need it for a project. Gonna write if I can make it work, should be doable in principle 🤔

Thanks for your work ❤️

[jacobsvante]

Haven't had the chance to try yet but will soon.
Have you tried building and linking scip statically?