This crate assumes you have DPDK installed globally, where both pkg-config and the dynamic loader can
find it. However, if you don't want to install it globally, you can build DPDK with a prefix. Say you
want to install it to $DPDK_PATH:
meson --prefix=$DPDK_PATH build
ninja -C build
ninja -C build install
Then, be sure to set PKG_CONFIG_PATH when building this crate (or a crate that depends on it):
PKG_CONFIG_PATH=$DPDK_PATH/lib/x86_64-linux-gnu/pkgconfig cargo build
Finally, when running the final binary, be sure to set LD_LIBRARY_PATH:
LD_LIBRARY_PATH=$DPDK_PATH/lib/x86_64-linux-gnu <your_binary>
Use this crate as a dependency, and be sure to call load_mlx5_driver somewhere in your program.
This ensures that the linker includes the librte_net_mlx5 PMD dependency: DPDK doesn't explicitly
depend on this library but rather has the driver register itself into a global list at runtime, and
the Rust-driven linking process will omit the dependency if it looks unused.
The librte_net_mlx5 hack could be removed if we could tell Rust's linker to send --no-as-needed to the linker.
Ideally, we'd be able to avoid needing to set LD_LIBRARY_PATH at runtime by having the linker emit a library
rpath for the final dynamic shared library. We would need to instruct Cargo to do this with a -rpath argument
to the linker. Additionally, the newer form of an ELF RUNPATH does not apply to recursive dependencies, which
DPDK relies on, so we would also need to pass --disable-new-dtags.