Issue

When running cargo r --release on Ubuntu server, compilation fails with:

error: failed to run custom build command for `librocksdb-sys v0.17.3+10.4.2`
thread 'main' panicked at lib.rs:616:27:
Unable to find libclang: "couldn't find any valid shared libraries matching: ['libclang.so', 'libclang-*.so', 'libclang.so.*', 'libclang-*.so.*']"

Root Cause

The rocksdb crate depends on librocksdb-sys, which uses bindgen to generate Rust bindings from C++ code. This process requires libclang to be installed on the system, but it's missing from the server.

Solution

Step 1: Install Required Dependencies

On Ubuntu/Debian systems, install the necessary build tools:

sudo apt update
sudo apt install libclang-dev

Step 2: Install additional deps if needed

sudo apt install clang llvm-dev build-essential

now it should work!