xref: /openbmc/linux/samples/bpf/Makefile (revision 0edbfea5)
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
23
24test_verifier-objs := test_verifier.o libbpf.o
25test_maps-objs := test_maps.o libbpf.o
26sock_example-objs := sock_example.o libbpf.o
27fds_example-objs := bpf_load.o libbpf.o fds_example.o
28sockex1-objs := bpf_load.o libbpf.o sockex1_user.o
29sockex2-objs := bpf_load.o libbpf.o sockex2_user.o
30sockex3-objs := bpf_load.o libbpf.o sockex3_user.o
31tracex1-objs := bpf_load.o libbpf.o tracex1_user.o
32tracex2-objs := bpf_load.o libbpf.o tracex2_user.o
33tracex3-objs := bpf_load.o libbpf.o tracex3_user.o
34tracex4-objs := bpf_load.o libbpf.o tracex4_user.o
35tracex5-objs := bpf_load.o libbpf.o tracex5_user.o
36tracex6-objs := bpf_load.o libbpf.o tracex6_user.o
37trace_output-objs := bpf_load.o libbpf.o trace_output_user.o
38lathist-objs := bpf_load.o libbpf.o lathist_user.o
39offwaketime-objs := bpf_load.o libbpf.o offwaketime_user.o
40spintest-objs := bpf_load.o libbpf.o spintest_user.o
41map_perf_test-objs := bpf_load.o libbpf.o map_perf_test_user.o
42test_overhead-objs := bpf_load.o libbpf.o test_overhead_user.o
43
44# Tell kbuild to always build the programs
45always := $(hostprogs-y)
46always += sockex1_kern.o
47always += sockex2_kern.o
48always += sockex3_kern.o
49always += tracex1_kern.o
50always += tracex2_kern.o
51always += tracex3_kern.o
52always += tracex4_kern.o
53always += tracex5_kern.o
54always += tracex6_kern.o
55always += trace_output_kern.o
56always += tcbpf1_kern.o
57always += lathist_kern.o
58always += offwaketime_kern.o
59always += spintest_kern.o
60always += map_perf_test_kern.o
61always += test_overhead_tp_kern.o
62always += test_overhead_kprobe_kern.o
63always += parse_varlen.o parse_simple.o parse_ldabs.o
64
65HOSTCFLAGS += -I$(objtree)/usr/include
66
67HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable
68HOSTLOADLIBES_fds_example += -lelf
69HOSTLOADLIBES_sockex1 += -lelf
70HOSTLOADLIBES_sockex2 += -lelf
71HOSTLOADLIBES_sockex3 += -lelf
72HOSTLOADLIBES_tracex1 += -lelf
73HOSTLOADLIBES_tracex2 += -lelf
74HOSTLOADLIBES_tracex3 += -lelf
75HOSTLOADLIBES_tracex4 += -lelf -lrt
76HOSTLOADLIBES_tracex5 += -lelf
77HOSTLOADLIBES_tracex6 += -lelf
78HOSTLOADLIBES_trace_output += -lelf -lrt
79HOSTLOADLIBES_lathist += -lelf
80HOSTLOADLIBES_offwaketime += -lelf
81HOSTLOADLIBES_spintest += -lelf
82HOSTLOADLIBES_map_perf_test += -lelf -lrt
83HOSTLOADLIBES_test_overhead += -lelf -lrt
84
85# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
86#  make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang
87LLC ?= llc
88CLANG ?= clang
89
90# Trick to allow make to be run from this directory
91all:
92	$(MAKE) -C ../../ $$PWD/
93
94clean:
95	$(MAKE) -C ../../ M=$$PWD clean
96	@rm -f *~
97
98# Verify LLVM compiler tools are available and bpf target is supported by llc
99.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
100
101verify_cmds: $(CLANG) $(LLC)
102	@for TOOL in $^ ; do \
103		if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \
104			echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\
105			exit 1; \
106		else true; fi; \
107	done
108
109verify_target_bpf: verify_cmds
110	@if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \
111		echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\
112		echo "   NOTICE: LLVM version >= 3.7.1 required" ;\
113		exit 2; \
114	else true; fi
115
116$(src)/*.c: verify_target_bpf
117
118# asm/sysreg.h - inline assembly used by it is incompatible with llvm.
119# But, there is no easy way to fix it, so just exclude it since it is
120# useless for BPF samples.
121$(obj)/%.o: $(src)/%.c
122	$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \
123		-D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \
124		-Wno-compare-distinct-pointer-types \
125		-O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@
126