34 lines
1.2 KiB
Markdown
34 lines
1.2 KiB
Markdown
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# geofw
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## Prerequisites
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1. stable rust toolchains: `rustup toolchain install stable`
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1. nightly rust toolchains: `rustup toolchain install nightly --component rust-src`
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1. (if cross-compiling) rustup target: `rustup target add ${ARCH}-unknown-linux-musl`
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1. (if cross-compiling) LLVM: (e.g.) `brew install llvm` (on macOS)
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1. (if cross-compiling) C toolchain: (e.g.) [`brew install filosottile/musl-cross/musl-cross`](https://github.com/FiloSottile/homebrew-musl-cross) (on macOS)
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1. bpf-linker: `cargo install bpf-linker` (`--no-default-features` on macOS)
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## Build & Run
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Use `cargo build`, `cargo check`, etc. as normal. Run your program with:
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```shell
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cargo run --release --config 'target."cfg(all())".runner="sudo -E"'
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```
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Cargo build scripts are used to automatically build the eBPF correctly and include it in the
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program.
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## Cross-compiling on macOS
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Cross compilation should work on both Intel and Apple Silicon Macs.
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```shell
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CC=${ARCH}-linux-musl-gcc cargo build --package geofw --release \
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--target=${ARCH}-unknown-linux-musl \
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--config=target.${ARCH}-unknown-linux-musl.linker=\"${ARCH}-linux-musl-gcc\"
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```
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The cross-compiled program `target/${ARCH}-unknown-linux-musl/release/geofw` can be
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copied to a Linux server or VM and run there.
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