1# SPDX-License-Identifier: GPL-2.0
2LIBDIR := ../../../lib
3BPFDIR := $(LIBDIR)/bpf
4APIDIR := ../../../include/uapi
5GENDIR := ../../../../include/generated
6GENHDR := $(GENDIR)/autoconf.h
7
8ifneq ($(wildcard $(GENHDR)),)
9  GENFLAGS := -DHAVE_GENHDR
10endif
11
12CFLAGS += -Wall -O2 -I$(APIDIR) -I$(LIBDIR) -I$(GENDIR) $(GENFLAGS) -I../../../include
13LDLIBS += -lcap -lelf
14
15TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \
16	test_align test_verifier_log test_dev_cgroup
17
18TEST_GEN_FILES = test_pkt_access.o test_xdp.o test_l4lb.o test_tcp_estats.o test_obj_id.o \
19	test_pkt_md_access.o test_xdp_redirect.o test_xdp_meta.o sockmap_parse_prog.o     \
20	sockmap_verdict_prog.o dev_cgroup.o
21
22TEST_PROGS := test_kmod.sh test_xdp_redirect.sh test_xdp_meta.sh
23
24include ../lib.mk
25
26BPFOBJ := $(OUTPUT)/libbpf.a $(OUTPUT)/cgroup_helpers.c
27
28$(TEST_GEN_PROGS): $(BPFOBJ)
29
30.PHONY: force
31
32# force a rebuild of BPFOBJ when its dependencies are updated
33force:
34
35$(BPFOBJ): force
36	$(MAKE) -C $(BPFDIR) OUTPUT=$(OUTPUT)/
37
38CLANG ?= clang
39LLC   ?= llc
40
41PROBE := $(shell llc -march=bpf -mcpu=probe -filetype=null /dev/null 2>&1)
42
43# Let newer LLVM versions transparently probe the kernel for availability
44# of full BPF instruction set.
45ifeq ($(PROBE),)
46  CPU ?= probe
47else
48  CPU ?= generic
49endif
50
51%.o: %.c
52	$(CLANG) -I. -I./include/uapi -I../../../include/uapi \
53		 -Wno-compare-distinct-pointer-types          \
54		 -O2 -target bpf -emit-llvm -c $< -o - |      \
55	$(LLC) -march=bpf -mcpu=$(CPU) -filetype=obj -o $@
56