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-rw-r--r--src/libknot/xdp/Makefile.am15
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diff --git a/src/libknot/xdp/Makefile.am b/src/libknot/xdp/Makefile.am
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+++ b/src/libknot/xdp/Makefile.am
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+# Useful commands:
+# make filter
+# ip link show $eth
+# sudo ip link set dev $eth xdp off
+# sudo ip link set dev $eth xdp obj ./bpf-kernel.o
+
+EXTRA_DIST = bpf-kernel-obj.c bpf-kernel.c
+
+.PHONY: filter
+
+filter:
+ rm -f bpf-kernel.ll bpf-kernel.o bpf-kernel-obj.c
+ clang -S -target bpf -Wall -O2 -emit-llvm -c -DNDEBUG -o bpf-kernel.ll -I/usr/include/x86_64-linux-gnu -include ../../config.h bpf-kernel.c
+ llc -march=bpf -filetype=obj -o bpf-kernel.o bpf-kernel.ll
+ xxd -i bpf-kernel.o > bpf-kernel-obj.c