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According to the official requirements, bindgen needs libclang to parse C/C++ headers. libclang is loaded at runtime by bindgen, which is why we didn't notice any build issue. However, using bindgen on a simple header file blows up: thread 'main' panicked at bindgen/lib.rs:616:27: Unable to find libclang: "couldn't find any valid shared libraries matching: ['libclang.so', 'libclang-*.so', 'libclang.so.*', 'libclang-*.so.*'], s et the `LIBCLANG_PATH` environment variable to a path where one of these files can be found (invalid: [])" note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace So far, bindgen was only used by mesa3d, and it turns out that mesa3d also depends on clang, which pulls in host-clang, so the problem was not visible. However, as we're about to use bindgen for other things (namely Rust support in Linux), this issue needs to be fixed. See: https://rust-lang.github.io/rust-bindgen/requirements.html Signed-off-by: El Mehdi YOUNES <elmehdi.younes@smile.fr> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>