samples/bpf/Makefile

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