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1# SPDX-License-Identifier: GPL-2.0
2
3BPF_SAMPLES_PATH ?= $(abspath $(srctree)/$(src))
4TOOLS_PATH := $(BPF_SAMPLES_PATH)/../../tools
5
6# List of programs to build
7tprogs-y := test_lru_dist
8tprogs-y += sock_example
9tprogs-y += fds_example
10tprogs-y += sockex1
11tprogs-y += sockex2
12tprogs-y += sockex3
13tprogs-y += tracex1
14tprogs-y += tracex2
15tprogs-y += tracex3
16tprogs-y += tracex4
17tprogs-y += tracex5
18tprogs-y += tracex6
19tprogs-y += tracex7
20tprogs-y += test_probe_write_user
21tprogs-y += trace_output
22tprogs-y += lathist
23tprogs-y += offwaketime
24tprogs-y += spintest
25tprogs-y += map_perf_test
26tprogs-y += test_overhead
27tprogs-y += test_cgrp2_array_pin
28tprogs-y += test_cgrp2_attach
29tprogs-y += test_cgrp2_sock
30tprogs-y += test_cgrp2_sock2
31tprogs-y += xdp1
32tprogs-y += xdp2
33tprogs-y += xdp_router_ipv4
34tprogs-y += test_current_task_under_cgroup
35tprogs-y += trace_event
36tprogs-y += sampleip
37tprogs-y += tc_l2_redirect
38tprogs-y += lwt_len_hist
39tprogs-y += xdp_tx_iptunnel
40tprogs-y += test_map_in_map
41tprogs-y += per_socket_stats_example
42tprogs-y += xdp_redirect
43tprogs-y += xdp_redirect_map
44tprogs-y += xdp_redirect_cpu
45tprogs-y += xdp_monitor
46tprogs-y += xdp_rxq_info
47tprogs-y += syscall_tp
48tprogs-y += cpustat
49tprogs-y += xdp_adjust_tail
50tprogs-y += xdpsock
51tprogs-y += xdp_fwd
52tprogs-y += task_fd_query
53tprogs-y += xdp_sample_pkts
54tprogs-y += ibumad
55tprogs-y += hbm
56
57# Libbpf dependencies
58LIBBPF = $(TOOLS_PATH)/lib/bpf/libbpf.a
59
60CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o
61TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o
62
63fds_example-objs := fds_example.o
64sockex1-objs := sockex1_user.o
65sockex2-objs := sockex2_user.o
66sockex3-objs := sockex3_user.o
67tracex1-objs := tracex1_user.o $(TRACE_HELPERS)
68tracex2-objs := tracex2_user.o
69tracex3-objs := tracex3_user.o
70tracex4-objs := tracex4_user.o
71tracex5-objs := tracex5_user.o $(TRACE_HELPERS)
72tracex6-objs := tracex6_user.o
73tracex7-objs := tracex7_user.o
74test_probe_write_user-objs := bpf_load.o test_probe_write_user_user.o
75trace_output-objs := bpf_load.o trace_output_user.o $(TRACE_HELPERS)
76lathist-objs := bpf_load.o lathist_user.o
77offwaketime-objs := bpf_load.o offwaketime_user.o $(TRACE_HELPERS)
78spintest-objs := bpf_load.o spintest_user.o $(TRACE_HELPERS)
79map_perf_test-objs := bpf_load.o map_perf_test_user.o
80test_overhead-objs := bpf_load.o test_overhead_user.o
81test_cgrp2_array_pin-objs := test_cgrp2_array_pin.o
82test_cgrp2_attach-objs := test_cgrp2_attach.o
83test_cgrp2_sock-objs := test_cgrp2_sock.o
84test_cgrp2_sock2-objs := bpf_load.o test_cgrp2_sock2.o
85xdp1-objs := xdp1_user.o
86# reuse xdp1 source intentionally
87xdp2-objs := xdp1_user.o
88xdp_router_ipv4-objs := xdp_router_ipv4_user.o
89test_current_task_under_cgroup-objs := bpf_load.o $(CGROUP_HELPERS) \
90 test_current_task_under_cgroup_user.o
91trace_event-objs := trace_event_user.o $(TRACE_HELPERS)
92sampleip-objs := sampleip_user.o $(TRACE_HELPERS)
93tc_l2_redirect-objs := bpf_load.o tc_l2_redirect_user.o
94lwt_len_hist-objs := bpf_load.o lwt_len_hist_user.o
95xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o
96test_map_in_map-objs := test_map_in_map_user.o
97per_socket_stats_example-objs := cookie_uid_helper_example.o
98xdp_redirect-objs := xdp_redirect_user.o
99xdp_redirect_map-objs := xdp_redirect_map_user.o
100xdp_redirect_cpu-objs := bpf_load.o xdp_redirect_cpu_user.o
101xdp_monitor-objs := bpf_load.o xdp_monitor_user.o
102xdp_rxq_info-objs := xdp_rxq_info_user.o
103syscall_tp-objs := bpf_load.o syscall_tp_user.o
104cpustat-objs := bpf_load.o cpustat_user.o
105xdp_adjust_tail-objs := xdp_adjust_tail_user.o
106xdpsock-objs := xdpsock_user.o
107xdp_fwd-objs := xdp_fwd_user.o
108task_fd_query-objs := bpf_load.o task_fd_query_user.o $(TRACE_HELPERS)
109xdp_sample_pkts-objs := xdp_sample_pkts_user.o $(TRACE_HELPERS)
110ibumad-objs := bpf_load.o ibumad_user.o $(TRACE_HELPERS)
111hbm-objs := bpf_load.o hbm.o $(CGROUP_HELPERS)
112
113# Tell kbuild to always build the programs
114always-y := $(tprogs-y)
115always-y += sockex1_kern.o
116always-y += sockex2_kern.o
117always-y += sockex3_kern.o
118always-y += tracex1_kern.o
119always-y += tracex2_kern.o
120always-y += tracex3_kern.o
121always-y += tracex4_kern.o
122always-y += tracex5_kern.o
123always-y += tracex6_kern.o
124always-y += tracex7_kern.o
125always-y += sock_flags_kern.o
126always-y += test_probe_write_user_kern.o
127always-y += trace_output_kern.o
128always-y += tcbpf1_kern.o
129always-y += tc_l2_redirect_kern.o
130always-y += lathist_kern.o
131always-y += offwaketime_kern.o
132always-y += spintest_kern.o
133always-y += map_perf_test_kern.o
134always-y += test_overhead_tp_kern.o
135always-y += test_overhead_raw_tp_kern.o
136always-y += test_overhead_kprobe_kern.o
137always-y += parse_varlen.o parse_simple.o parse_ldabs.o
138always-y += test_cgrp2_tc_kern.o
139always-y += xdp1_kern.o
140always-y += xdp2_kern.o
141always-y += xdp_router_ipv4_kern.o
142always-y += test_current_task_under_cgroup_kern.o
143always-y += trace_event_kern.o
144always-y += sampleip_kern.o
145always-y += lwt_len_hist_kern.o
146always-y += xdp_tx_iptunnel_kern.o
147always-y += test_map_in_map_kern.o
148always-y += tcp_synrto_kern.o
149always-y += tcp_rwnd_kern.o
150always-y += tcp_bufs_kern.o
151always-y += tcp_cong_kern.o
152always-y += tcp_iw_kern.o
153always-y += tcp_clamp_kern.o
154always-y += tcp_basertt_kern.o
155always-y += tcp_tos_reflect_kern.o
156always-y += tcp_dumpstats_kern.o
157always-y += xdp_redirect_kern.o
158always-y += xdp_redirect_map_kern.o
159always-y += xdp_redirect_cpu_kern.o
160always-y += xdp_monitor_kern.o
161always-y += xdp_rxq_info_kern.o
162always-y += xdp2skb_meta_kern.o
163always-y += syscall_tp_kern.o
164always-y += cpustat_kern.o
165always-y += xdp_adjust_tail_kern.o
166always-y += xdp_fwd_kern.o
167always-y += task_fd_query_kern.o
168always-y += xdp_sample_pkts_kern.o
169always-y += ibumad_kern.o
170always-y += hbm_out_kern.o
171always-y += hbm_edt_kern.o
172always-y += xdpsock_kern.o
173
174ifeq ($(ARCH), arm)
175# Strip all except -D__LINUX_ARM_ARCH__ option needed to handle linux
176# headers when arm instruction set identification is requested.
177ARM_ARCH_SELECTOR := $(filter -D__LINUX_ARM_ARCH__%, $(KBUILD_CFLAGS))
178BPF_EXTRA_CFLAGS := $(ARM_ARCH_SELECTOR)
179TPROGS_CFLAGS += $(ARM_ARCH_SELECTOR)
180endif
181
182TPROGS_CFLAGS += -Wall -O2
183TPROGS_CFLAGS += -Wmissing-prototypes
184TPROGS_CFLAGS += -Wstrict-prototypes
185
186TPROGS_CFLAGS += -I$(objtree)/usr/include
187TPROGS_CFLAGS += -I$(srctree)/tools/testing/selftests/bpf/
188TPROGS_CFLAGS += -I$(srctree)/tools/lib/
189TPROGS_CFLAGS += -I$(srctree)/tools/include
190TPROGS_CFLAGS += -I$(srctree)/tools/perf
191TPROGS_CFLAGS += -DHAVE_ATTR_TEST=0
192
193ifdef SYSROOT
194TPROGS_CFLAGS += --sysroot=$(SYSROOT)
195TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib
196endif
197
198TPROGCFLAGS_bpf_load.o += -Wno-unused-variable
199
200TPROGS_LDLIBS += $(LIBBPF) -lelf -lz
201TPROGLDLIBS_tracex4 += -lrt
202TPROGLDLIBS_trace_output += -lrt
203TPROGLDLIBS_map_perf_test += -lrt
204TPROGLDLIBS_test_overhead += -lrt
205TPROGLDLIBS_xdpsock += -pthread
206
207# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
208# make M=samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang
209LLC ?= llc
210CLANG ?= clang
211LLVM_OBJCOPY ?= llvm-objcopy
212BTF_PAHOLE ?= pahole
213
214# Detect that we're cross compiling and use the cross compiler
215ifdef CROSS_COMPILE
216CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_COMPILE:%-=%))
217endif
218
219# Don't evaluate probes and warnings if we need to run make recursively
220ifneq ($(src),)
221HDR_PROBE := $(shell printf "\#include <linux/types.h>\n struct list_head { int a; }; int main() { return 0; }" | \
222 $(CC) $(TPROGS_CFLAGS) $(TPROGS_LDFLAGS) -x c - \
223 -o /dev/null 2>/dev/null && echo okay)
224
225ifeq ($(HDR_PROBE),)
226$(warning WARNING: Detected possible issues with include path.)
227$(warning WARNING: Please install kernel headers locally (make headers_install).)
228endif
229
230BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris)
231BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)
232BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm')
233BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \
234 $(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \
235 readelf -S ./llvm_btf_verify.o | grep BTF; \
236 /bin/rm -f ./llvm_btf_verify.o)
237
238BPF_EXTRA_CFLAGS += -fno-stack-protector
239ifneq ($(BTF_LLVM_PROBE),)
240 BPF_EXTRA_CFLAGS += -g
241else
242ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),)
243 BPF_EXTRA_CFLAGS += -g
244 LLC_FLAGS += -mattr=dwarfris
245 DWARF2BTF = y
246endif
247endif
248endif
249
250# Trick to allow make to be run from this directory
251all:
252 $(MAKE) -C ../../ M=$(CURDIR) BPF_SAMPLES_PATH=$(CURDIR)
253
254clean:
255 $(MAKE) -C ../../ M=$(CURDIR) clean
256 @find $(CURDIR) -type f -name '*~' -delete
257
258$(LIBBPF): FORCE
259# Fix up variables inherited from Kbuild that tools build system won't like
260 $(MAKE) -C $(dir $@) RM='rm -rf' EXTRA_CFLAGS="$(TPROGS_CFLAGS)" \
261 LDFLAGS=$(TPROGS_LDFLAGS) srctree=$(BPF_SAMPLES_PATH)/../../ O=
262
263$(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s FORCE
264 $(call filechk,offsets,__SYSCALL_NRS_H__)
265
266targets += syscall_nrs.s
267clean-files += syscall_nrs.h
268
269FORCE:
270
271
272# Verify LLVM compiler tools are available and bpf target is supported by llc
273.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
274
275verify_cmds: $(CLANG) $(LLC)
276 @for TOOL in $^ ; do \
277 if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \
278 echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\
279 exit 1; \
280 else true; fi; \
281 done
282
283verify_target_bpf: verify_cmds
284 @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \
285 echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\
286 echo " NOTICE: LLVM version >= 3.7.1 required" ;\
287 exit 2; \
288 else true; fi
289
290$(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF)
291$(src)/*.c: verify_target_bpf $(LIBBPF)
292
293$(obj)/tracex5_kern.o: $(obj)/syscall_nrs.h
294$(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
295$(obj)/hbm.o: $(src)/hbm.h
296$(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
297
298-include $(BPF_SAMPLES_PATH)/Makefile.target
299
300# asm/sysreg.h - inline assembly used by it is incompatible with llvm.
301# But, there is no easy way to fix it, so just exclude it since it is
302# useless for BPF samples.
303$(obj)/%.o: $(src)/%.c
304 @echo " CLANG-bpf " $@
305 $(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(BPF_EXTRA_CFLAGS) \
306 -I$(obj) -I$(srctree)/tools/testing/selftests/bpf/ \
307 -I$(srctree)/tools/lib/ \
308 -D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \
309 -D__TARGET_ARCH_$(SRCARCH) -Wno-compare-distinct-pointer-types \
310 -Wno-gnu-variable-sized-type-not-at-end \
311 -Wno-address-of-packed-member -Wno-tautological-compare \
312 -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \
313 -I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \
314 -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@
315ifeq ($(DWARF2BTF),y)
316 $(BTF_PAHOLE) -J $@
317endif
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_lru_dist
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 += test_probe_write_user
18hostprogs-y += trace_output
19hostprogs-y += lathist
20hostprogs-y += offwaketime
21hostprogs-y += spintest
22hostprogs-y += map_perf_test
23hostprogs-y += test_overhead
24hostprogs-y += test_cgrp2_array_pin
25hostprogs-y += test_cgrp2_attach
26hostprogs-y += test_cgrp2_attach2
27hostprogs-y += test_cgrp2_sock
28hostprogs-y += test_cgrp2_sock2
29hostprogs-y += xdp1
30hostprogs-y += xdp2
31hostprogs-y += test_current_task_under_cgroup
32hostprogs-y += trace_event
33hostprogs-y += sampleip
34hostprogs-y += tc_l2_redirect
35hostprogs-y += lwt_len_hist
36hostprogs-y += xdp_tx_iptunnel
37
38# Libbpf dependencies
39LIBBPF := ../../tools/lib/bpf/bpf.o
40
41test_lru_dist-objs := test_lru_dist.o $(LIBBPF)
42sock_example-objs := sock_example.o $(LIBBPF)
43fds_example-objs := bpf_load.o $(LIBBPF) fds_example.o
44sockex1-objs := bpf_load.o $(LIBBPF) sockex1_user.o
45sockex2-objs := bpf_load.o $(LIBBPF) sockex2_user.o
46sockex3-objs := bpf_load.o $(LIBBPF) sockex3_user.o
47tracex1-objs := bpf_load.o $(LIBBPF) tracex1_user.o
48tracex2-objs := bpf_load.o $(LIBBPF) tracex2_user.o
49tracex3-objs := bpf_load.o $(LIBBPF) tracex3_user.o
50tracex4-objs := bpf_load.o $(LIBBPF) tracex4_user.o
51tracex5-objs := bpf_load.o $(LIBBPF) tracex5_user.o
52tracex6-objs := bpf_load.o $(LIBBPF) tracex6_user.o
53test_probe_write_user-objs := bpf_load.o $(LIBBPF) test_probe_write_user_user.o
54trace_output-objs := bpf_load.o $(LIBBPF) trace_output_user.o
55lathist-objs := bpf_load.o $(LIBBPF) lathist_user.o
56offwaketime-objs := bpf_load.o $(LIBBPF) offwaketime_user.o
57spintest-objs := bpf_load.o $(LIBBPF) spintest_user.o
58map_perf_test-objs := bpf_load.o $(LIBBPF) map_perf_test_user.o
59test_overhead-objs := bpf_load.o $(LIBBPF) test_overhead_user.o
60test_cgrp2_array_pin-objs := $(LIBBPF) test_cgrp2_array_pin.o
61test_cgrp2_attach-objs := $(LIBBPF) test_cgrp2_attach.o
62test_cgrp2_attach2-objs := $(LIBBPF) test_cgrp2_attach2.o cgroup_helpers.o
63test_cgrp2_sock-objs := $(LIBBPF) test_cgrp2_sock.o
64test_cgrp2_sock2-objs := bpf_load.o $(LIBBPF) test_cgrp2_sock2.o
65xdp1-objs := bpf_load.o $(LIBBPF) xdp1_user.o
66# reuse xdp1 source intentionally
67xdp2-objs := bpf_load.o $(LIBBPF) xdp1_user.o
68test_current_task_under_cgroup-objs := bpf_load.o $(LIBBPF) cgroup_helpers.o \
69 test_current_task_under_cgroup_user.o
70trace_event-objs := bpf_load.o $(LIBBPF) trace_event_user.o
71sampleip-objs := bpf_load.o $(LIBBPF) sampleip_user.o
72tc_l2_redirect-objs := bpf_load.o $(LIBBPF) tc_l2_redirect_user.o
73lwt_len_hist-objs := bpf_load.o $(LIBBPF) lwt_len_hist_user.o
74xdp_tx_iptunnel-objs := bpf_load.o $(LIBBPF) xdp_tx_iptunnel_user.o
75
76# Tell kbuild to always build the programs
77always := $(hostprogs-y)
78always += sockex1_kern.o
79always += sockex2_kern.o
80always += sockex3_kern.o
81always += tracex1_kern.o
82always += tracex2_kern.o
83always += tracex3_kern.o
84always += tracex4_kern.o
85always += tracex5_kern.o
86always += tracex6_kern.o
87always += sock_flags_kern.o
88always += test_probe_write_user_kern.o
89always += trace_output_kern.o
90always += tcbpf1_kern.o
91always += tcbpf2_kern.o
92always += tc_l2_redirect_kern.o
93always += lathist_kern.o
94always += offwaketime_kern.o
95always += spintest_kern.o
96always += map_perf_test_kern.o
97always += test_overhead_tp_kern.o
98always += test_overhead_kprobe_kern.o
99always += parse_varlen.o parse_simple.o parse_ldabs.o
100always += test_cgrp2_tc_kern.o
101always += xdp1_kern.o
102always += xdp2_kern.o
103always += test_current_task_under_cgroup_kern.o
104always += trace_event_kern.o
105always += sampleip_kern.o
106always += lwt_len_hist_kern.o
107always += xdp_tx_iptunnel_kern.o
108
109HOSTCFLAGS += -I$(objtree)/usr/include
110HOSTCFLAGS += -I$(srctree)/tools/lib/
111HOSTCFLAGS += -I$(srctree)/tools/testing/selftests/bpf/
112HOSTCFLAGS += -I$(srctree)/tools/lib/ -I$(srctree)/tools/include
113HOSTCFLAGS += -I$(srctree)/tools/perf
114
115HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable
116HOSTLOADLIBES_fds_example += -lelf
117HOSTLOADLIBES_sockex1 += -lelf
118HOSTLOADLIBES_sockex2 += -lelf
119HOSTLOADLIBES_sockex3 += -lelf
120HOSTLOADLIBES_tracex1 += -lelf
121HOSTLOADLIBES_tracex2 += -lelf
122HOSTLOADLIBES_tracex3 += -lelf
123HOSTLOADLIBES_tracex4 += -lelf -lrt
124HOSTLOADLIBES_tracex5 += -lelf
125HOSTLOADLIBES_tracex6 += -lelf
126HOSTLOADLIBES_test_cgrp2_sock2 += -lelf
127HOSTLOADLIBES_test_probe_write_user += -lelf
128HOSTLOADLIBES_trace_output += -lelf -lrt
129HOSTLOADLIBES_lathist += -lelf
130HOSTLOADLIBES_offwaketime += -lelf
131HOSTLOADLIBES_spintest += -lelf
132HOSTLOADLIBES_map_perf_test += -lelf -lrt
133HOSTLOADLIBES_test_overhead += -lelf -lrt
134HOSTLOADLIBES_xdp1 += -lelf
135HOSTLOADLIBES_xdp2 += -lelf
136HOSTLOADLIBES_test_current_task_under_cgroup += -lelf
137HOSTLOADLIBES_trace_event += -lelf
138HOSTLOADLIBES_sampleip += -lelf
139HOSTLOADLIBES_tc_l2_redirect += -l elf
140HOSTLOADLIBES_lwt_len_hist += -l elf
141HOSTLOADLIBES_xdp_tx_iptunnel += -lelf
142
143# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
144# make samples/bpf LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang
145LLC ?= llc
146CLANG ?= clang
147
148# Trick to allow make to be run from this directory
149all:
150 $(MAKE) -C ../../ $(CURDIR)/
151
152clean:
153 $(MAKE) -C ../../ M=$(CURDIR) clean
154 @rm -f *~
155
156# Verify LLVM compiler tools are available and bpf target is supported by llc
157.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
158
159verify_cmds: $(CLANG) $(LLC)
160 @for TOOL in $^ ; do \
161 if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \
162 echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\
163 exit 1; \
164 else true; fi; \
165 done
166
167verify_target_bpf: verify_cmds
168 @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \
169 echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\
170 echo " NOTICE: LLVM version >= 3.7.1 required" ;\
171 exit 2; \
172 else true; fi
173
174$(src)/*.c: verify_target_bpf
175
176# asm/sysreg.h - inline assembly used by it is incompatible with llvm.
177# But, there is no easy way to fix it, so just exclude it since it is
178# useless for BPF samples.
179$(obj)/%.o: $(src)/%.c
180 $(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \
181 -D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \
182 -Wno-compare-distinct-pointer-types \
183 -Wno-gnu-variable-sized-type-not-at-end \
184 -Wno-address-of-packed-member -Wno-tautological-compare \
185 -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@