redbpf

redbpf copied to clipboard

Hello,

I'm trying to install cargo-bpf but it doesn't build. Here is the error:

error: Can not use LLVM12 with Rust >= 1.56
  --> /home/irevoire/.cargo/registry/src/github.com-1ecc6299db9ec823/cargo-bpf-2.3.0/src/llvm.rs:26:9
   |
26 |         compile_error!("Can not use LLVM12 with Rust >= 1.56");
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: could not compile `cargo-bpf` due to previous error
warning: build failed, waiting for other jobs to finish...
error: failed to compile `cargo-bpf v2.3.0`, intermediate artifacts can be found at `/tmp/cargo-installoQlyiW`

Caused by:
  build failed

The problem is that I'm using LLVM13:

% llvm-config --version
13.0.0
% pacman -Q llvm
llvm 13.0.0-6

I also tried to specify the location of my llvm installation with the LLVM_SYS_130_PREFIX env var but it changed nothing.

export LLVM_SYS_130_PREFIX=$(whereis llvm)

If it helps, I'm also using this version of rust:

% rustc --version
rustc 1.60.0-nightly (6abb6385b 2022-01-26)

And I tried with stable rust (1.58.0) but I have the same error.

Can I do something about it?

I had the same issue, after searching through the code I found that the following worked for me: cargo install cargo-bpf --features llvm-sys-130.

Having another problem while trying to build cargo-bpf. Installed llvm-13 (as mentioned in tutorial), but the compiler still can't build llvm-sys.

cargo install cargo-bpf --features llvm-sys-130

error: could not find native static library `Polly`, perhaps an -L flag is missing?

Ubuntu 20.04.3 LTS

llvm-13 which is provided by Ubuntu for some reason doesn't provide Polly, you have to install 'libclang' or something to get it. Alternative is to install official llvm package.

@kriomant thank for reply, but I installed llvm 13 via llvm.sh script (which I believe, the official way). Anyway, I downgraded rust version to the one, which is supported llvm 12.

@irevoire I also had same issue. This is solved mine. cargo install cargo-bpf --no-default-features --features=llvm13,command-line

In case it is helpful to anyone I ran into this problem on Arch Linux with LLVM 14.0.6 and noticed that they had made a change to the error in the main branch, which had not yet been released:

https://github.com/foniod/redbpf/commit/15ac8def9a97b908c7a48a59af31a5d2b1ad1b2f#diff-07726f98f61f7b41779df39f71d89a27822be16e60c0ade60258a611af61ae33R26

And so as mentioned in above posts, the following worked for me to install:

$ cargo install cargo-bpf --features=llvm13

And additionally in my application where cargo-bpf was a build dependency I needed:

[build-dependencies]
cargo-bpf = { version = "2.3.0", features = ["llvm13"] }