1# kbuild trick to avoid linker error. Can be omitted if a module is built. 2obj- := dummy.o 3 4# List of programs to build 5hostprogs-y := test_verifier test_maps 6hostprogs-y += sock_example 7hostprogs-y += sockex1 8hostprogs-y += sockex2 9hostprogs-y += tracex1 10hostprogs-y += tracex2 11hostprogs-y += tracex3 12 13test_verifier-objs := test_verifier.o libbpf.o 14test_maps-objs := test_maps.o libbpf.o 15sock_example-objs := sock_example.o libbpf.o 16sockex1-objs := bpf_load.o libbpf.o sockex1_user.o 17sockex2-objs := bpf_load.o libbpf.o sockex2_user.o 18tracex1-objs := bpf_load.o libbpf.o tracex1_user.o 19tracex2-objs := bpf_load.o libbpf.o tracex2_user.o 20tracex3-objs := bpf_load.o libbpf.o tracex3_user.o 21 22# Tell kbuild to always build the programs 23always := $(hostprogs-y) 24always += sockex1_kern.o 25always += sockex2_kern.o 26always += tracex1_kern.o 27always += tracex2_kern.o 28always += tracex3_kern.o 29 30HOSTCFLAGS += -I$(objtree)/usr/include 31 32HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable 33HOSTLOADLIBES_sockex1 += -lelf 34HOSTLOADLIBES_sockex2 += -lelf 35HOSTLOADLIBES_tracex1 += -lelf 36HOSTLOADLIBES_tracex2 += -lelf 37HOSTLOADLIBES_tracex3 += -lelf 38 39# point this to your LLVM backend with bpf support 40LLC=$(srctree)/tools/bpf/llvm/bld/Debug+Asserts/bin/llc 41 42%.o: %.c 43 clang $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \ 44 -D__KERNEL__ -Wno-unused-value -Wno-pointer-sign \ 45 -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@ 46