xref: /openbmc/linux/samples/bpf/Makefile (revision 764cbcce)
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 += fds_example
8hostprogs-y += sockex1
9hostprogs-y += sockex2
10hostprogs-y += sockex3
11hostprogs-y += tracex1
12hostprogs-y += tracex2
13hostprogs-y += tracex3
14hostprogs-y += tracex4
15hostprogs-y += tracex5
16hostprogs-y += tracex6
17hostprogs-y += trace_output
18hostprogs-y += lathist
19hostprogs-y += offwaketime
20hostprogs-y += spintest
21hostprogs-y += map_perf_test
22hostprogs-y += test_overhead
23hostprogs-y += test_cgrp2_array_pin
24hostprogs-y += xdp1
25hostprogs-y += xdp2
26
27test_verifier-objs := test_verifier.o libbpf.o
28test_maps-objs := test_maps.o libbpf.o
29sock_example-objs := sock_example.o libbpf.o
30fds_example-objs := bpf_load.o libbpf.o fds_example.o
31sockex1-objs := bpf_load.o libbpf.o sockex1_user.o
32sockex2-objs := bpf_load.o libbpf.o sockex2_user.o
33sockex3-objs := bpf_load.o libbpf.o sockex3_user.o
34tracex1-objs := bpf_load.o libbpf.o tracex1_user.o
35tracex2-objs := bpf_load.o libbpf.o tracex2_user.o
36tracex3-objs := bpf_load.o libbpf.o tracex3_user.o
37tracex4-objs := bpf_load.o libbpf.o tracex4_user.o
38tracex5-objs := bpf_load.o libbpf.o tracex5_user.o
39tracex6-objs := bpf_load.o libbpf.o tracex6_user.o
40trace_output-objs := bpf_load.o libbpf.o trace_output_user.o
41lathist-objs := bpf_load.o libbpf.o lathist_user.o
42offwaketime-objs := bpf_load.o libbpf.o offwaketime_user.o
43spintest-objs := bpf_load.o libbpf.o spintest_user.o
44map_perf_test-objs := bpf_load.o libbpf.o map_perf_test_user.o
45test_overhead-objs := bpf_load.o libbpf.o test_overhead_user.o
46test_cgrp2_array_pin-objs := libbpf.o test_cgrp2_array_pin.o
47xdp1-objs := bpf_load.o libbpf.o xdp1_user.o
48# reuse xdp1 source intentionally
49xdp2-objs := bpf_load.o libbpf.o xdp1_user.o
50
51# Tell kbuild to always build the programs
52always := $(hostprogs-y)
53always += sockex1_kern.o
54always += sockex2_kern.o
55always += sockex3_kern.o
56always += tracex1_kern.o
57always += tracex2_kern.o
58always += tracex3_kern.o
59always += tracex4_kern.o
60always += tracex5_kern.o
61always += tracex6_kern.o
62always += trace_output_kern.o
63always += tcbpf1_kern.o
64always += lathist_kern.o
65always += offwaketime_kern.o
66always += spintest_kern.o
67always += map_perf_test_kern.o
68always += test_overhead_tp_kern.o
69always += test_overhead_kprobe_kern.o
70always += parse_varlen.o parse_simple.o parse_ldabs.o
71always += test_cgrp2_tc_kern.o
72always += xdp1_kern.o
73always += xdp2_kern.o
74
75HOSTCFLAGS += -I$(objtree)/usr/include
76
77HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable
78HOSTLOADLIBES_fds_example += -lelf
79HOSTLOADLIBES_sockex1 += -lelf
80HOSTLOADLIBES_sockex2 += -lelf
81HOSTLOADLIBES_sockex3 += -lelf
82HOSTLOADLIBES_tracex1 += -lelf
83HOSTLOADLIBES_tracex2 += -lelf
84HOSTLOADLIBES_tracex3 += -lelf
85HOSTLOADLIBES_tracex4 += -lelf -lrt
86HOSTLOADLIBES_tracex5 += -lelf
87HOSTLOADLIBES_tracex6 += -lelf
88HOSTLOADLIBES_trace_output += -lelf -lrt
89HOSTLOADLIBES_lathist += -lelf
90HOSTLOADLIBES_offwaketime += -lelf
91HOSTLOADLIBES_spintest += -lelf
92HOSTLOADLIBES_map_perf_test += -lelf -lrt
93HOSTLOADLIBES_test_overhead += -lelf -lrt
94HOSTLOADLIBES_xdp1 += -lelf
95HOSTLOADLIBES_xdp2 += -lelf
96
97# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
98#  make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang
99LLC ?= llc
100CLANG ?= clang
101
102# Trick to allow make to be run from this directory
103all:
104	$(MAKE) -C ../../ $$PWD/
105
106clean:
107	$(MAKE) -C ../../ M=$$PWD clean
108	@rm -f *~
109
110# Verify LLVM compiler tools are available and bpf target is supported by llc
111.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
112
113verify_cmds: $(CLANG) $(LLC)
114	@for TOOL in $^ ; do \
115		if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \
116			echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\
117			exit 1; \
118		else true; fi; \
119	done
120
121verify_target_bpf: verify_cmds
122	@if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \
123		echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\
124		echo "   NOTICE: LLVM version >= 3.7.1 required" ;\
125		exit 2; \
126	else true; fi
127
128$(src)/*.c: verify_target_bpf
129
130# asm/sysreg.h - inline assembly used by it is incompatible with llvm.
131# But, there is no easy way to fix it, so just exclude it since it is
132# useless for BPF samples.
133$(obj)/%.o: $(src)/%.c
134	$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \
135		-D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \
136		-Wno-compare-distinct-pointer-types \
137		-O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@
138