Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
9
10test_verifier-objs := test_verifier.o libbpf.o
11test_maps-objs := test_maps.o libbpf.o
12sock_example-objs := sock_example.o libbpf.o
13sockex1-objs := bpf_load.o libbpf.o sockex1_user.o
14sockex2-objs := bpf_load.o libbpf.o sockex2_user.o
15
16# Tell kbuild to always build the programs
17always := $(hostprogs-y)
18always += sockex1_kern.o
19always += sockex2_kern.o
20
21HOSTCFLAGS += -I$(objtree)/usr/include
22
23HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable
24HOSTLOADLIBES_sockex1 += -lelf
25HOSTLOADLIBES_sockex2 += -lelf
26
27# point this to your LLVM backend with bpf support
28LLC=$(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 $@