Linux not supported

[jafioti]

I was trying to build the add example, and since the guide makes no mention that linux isn't supported I assumed it was. When I ran the build script, I get Unsupported target with no matching prebuilt LLVM: x86_64-unknown-linux-gnu, install LLVM and set LLVM_CONFIG.

I went through the build script and saw this:

fn target_to_llvm_prebuilt(target: &str) -> String {
    println!("Target: {}", target);
    let base = match target {
        "x86_64-pc-windows-msvc" => "windows-x86_64",
        // NOTE(RDambrosio016): currently disabled because of weird issues with segfaults and building the C++ shim
        //"x86_64-unknown-linux-gnu" => "linux-x86_64",
        _ => panic!("Unsupported target with no matching prebuilt LLVM: `{}`, install LLVM and set LLVM_CONFIG", target)
    };
    format!("{}.tar.xz", base)
}

So is there a plan to re-support linux?

[nhemsley]

This is only downloading the prebuilt version of LLVM, set LLVM_CONFIG to where your llvm-config binary is. Note that this should be an absolute path, not relative (like ../../path/to/llvm)

[gastrodon]

I'm getting this issue to. When I export LLVM_CONFIG=/usr/bin/llvm-config I get the same issue.

[jorge-ortega]

LLVM 7 is the current requirement for building the codegen. Make sure llvm-config --version returns a line that starts with 7.

Note that this issue is concerned with prebuilt LLVM 7 support on linux. The build script attempts to download and use a prebuilt version of LLVM 7 if USE_PREBUILT_LLVM=1, or if llvm-config is not found in PATH or set via LLVM_CONFIG, or does not return some version 7. It tries to be helpful but does no caching of this and ends up downloading it on every build. Manually installing LLVM 7 on your platform and setting LLVM_CONFIG is the recommend way to build/use the codegen.

[adamcavendish]

I'm getting this issue to. When I export LLVM_CONFIG=/usr/bin/llvm-config I get the same issue.

You guys can try the docker image provided in the official repository so all the dependencies are setup already inside.