first commit

xdp/Makefile

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+LLC ?= llc
+CLANG ?= clang
+CC ?= gcc
+
+all: bridge_xdp.o loader
+
+bridge_xdp.o: bridge_xdp.c
+	$(CLANG) -S \
+	    -target bpf \
+	    -D __BPF_TRACING__ \
+	    -I/usr/include/x86_64-linux-gnu \
+	    -Wall \
+	    -O2 -emit-llvm -c -o bridge_xdp.ll bridge_xdp.c
+	$(LLC) -march=bpf -filetype=obj -o bridge_xdp.o bridge_xdp.ll
+
+loader: loader.c
+	$(CC) -Wall -o loader loader.c -l:libbpf.a -lelf -lz
+
+clean:
+	rm -f bridge_xdp.o bridge_xdp.ll loader