samples: bpf: trivial eBPF program in C

[cascardo/linux.git] / samples / bpf / Makefile

diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 6343917..770d145 100644 (file)
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -2,11 +2,28 @@
 obj- := dummy.o
 
 # List of programs to build
-hostprogs-y := test_verifier
+hostprogs-y := test_verifier test_maps
+hostprogs-y += sock_example
+hostprogs-y += sockex1
 
 test_verifier-objs := test_verifier.o libbpf.o
+test_maps-objs := test_maps.o libbpf.o
+sock_example-objs := sock_example.o libbpf.o
+sockex1-objs := bpf_load.o libbpf.o sockex1_user.o
 
 # Tell kbuild to always build the programs
 always := $(hostprogs-y)
+always += sockex1_kern.o
 
 HOSTCFLAGS += -I$(objtree)/usr/include
+
+HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable
+HOSTLOADLIBES_sockex1 += -lelf
+
+# point this to your LLVM backend with bpf support
+LLC=$(srctree)/tools/bpf/llvm/bld/Debug+Asserts/bin/llc
+
+%.o: %.c
+       clang $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \
+               -D__KERNEL__ -Wno-unused-value -Wno-pointer-sign \
+               -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@