1 # SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-
2 include ../../scripts/Makefile.include
3
4 OUTPUT ?= $(abspath .output)/
5
6 BPFTOOL_OUTPUT := $(OUTPUT)bpftool/
7 DEFAULT_BPFTOOL := $(BPFTOOL_OUTPUT)bootstrap/
8 BPFTOOL ?= $(DEFAULT_BPFTOOL)
9 LIBBPF_SRC := $(abspath ../../lib/bpf)
10 BPFOBJ_OUTPUT := $(OUTPUT)libbpf/
11 BPFOBJ := $(BPFOBJ_OUTPUT)libbpf.a
12 BPF_DESTDIR := $(BPFOBJ_OUTPUT)
13 BPF_INCLUDE := $(BPF_DESTDIR)/include
14 INCLUDES := -I$(OUTPUT) -I$(BPF_INCLUDE) -I$(a
15 CFLAGS := -g -Wall $(CLANG_CROSS_FLAGS)
16 CFLAGS += $(EXTRA_CFLAGS)
17 LDFLAGS += $(EXTRA_LDFLAGS)
18 LDLIBS += -lelf -lz
19
20 # Try to detect best kernel BTF source
21 KERNEL_REL := $(shell uname -r)
22 VMLINUX_BTF_PATHS := $(if $(O),$(O)/vmlinux)
23 $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)
24 ../../../vmlinux /sys/kernel/btf/vmlin
25 /boot/vmlinux-$(KERNEL_REL)
26 VMLINUX_BTF_PATH := $(or $(VMLINUX_BTF),$(firs
27 $(wi
28
29 ifeq ($(V),1)
30 Q =
31 else
32 Q = @
33 MAKEFLAGS += --no-print-directory
34 submake_extras := feature_display=0
35 endif
36
37 .DELETE_ON_ERROR:
38
39 .PHONY: all clean runqslower libbpf_hdrs
40 all: runqslower
41
42 runqslower: $(OUTPUT)/runqslower
43
44 clean:
45 $(call QUIET_CLEAN, runqslower)
46 $(Q)$(RM) -r $(BPFOBJ_OUTPUT) $(BPFTOO
47 $(Q)$(RM) $(OUTPUT)*.o $(OUTPUT)*.d
48 $(Q)$(RM) $(OUTPUT)*.skel.h $(OUTPUT)v
49 $(Q)$(RM) $(OUTPUT)runqslower
50 $(Q)$(RM) -r .output
51
52 libbpf_hdrs: $(BPFOBJ)
53
54 $(OUTPUT)/runqslower: $(OUTPUT)/runqslower.o $
55 $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS
56
57 $(OUTPUT)/runqslower.o: runqslower.h $(OUTPUT)
58 $(OUTPUT)/runqslower.b
59
60 $(OUTPUT)/runqslower.bpf.o: $(OUTPUT)/vmlinux.
61
62 $(OUTPUT)/%.skel.h: $(OUTPUT)/%.bpf.o | $(BPFT
63 $(QUIET_GEN)$(BPFTOOL) gen skeleton $<
64
65 $(OUTPUT)/%.bpf.o: %.bpf.c $(BPFOBJ) | $(OUTPU
66 $(QUIET_GEN)$(CLANG) -g -O2 --target=b
67 -c $(filter %.c,$^) -o $@ &&
68 $(LLVM_STRIP) -g $@
69
70 $(OUTPUT)/%.o: %.c | $(OUTPUT)
71 $(QUIET_CC)$(CC) $(CFLAGS) $(INCLUDES)
72
73 $(OUTPUT) $(BPFOBJ_OUTPUT) $(BPFTOOL_OUTPUT):
74 $(QUIET_MKDIR)mkdir -p $@
75
76 $(OUTPUT)/vmlinux.h: $(VMLINUX_BTF_PATH) | $(O
77 ifeq ($(VMLINUX_H),)
78 $(Q)if [ ! -e "$(VMLINUX_BTF_PATH)" ]
79 echo "Couldn't find kernel BTF
80 "specify its location.
81 exit 1;\
82 fi
83 $(QUIET_GEN)$(BPFTOOL) btf dump file $
84 else
85 $(Q)cp "$(VMLINUX_H)" $@
86 endif
87
88 $(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(L
89 $(Q)$(MAKE) $(submake_extras) -C $(LIB
90 DESTDIR=$(BPFOBJ_OUTPUT) p
91
92 $(DEFAULT_BPFTOOL): | $(BPFTOOL_OUTPUT)
93 $(Q)$(MAKE) $(submake_extras) -C ../bp
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