Commit | Line | Data |
---|---|---|
b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
1b76c13e WN |
2 | # Most of this file is copied from tools/lib/traceevent/Makefile |
3 | ||
4 | BPF_VERSION = 0 | |
5 | BPF_PATCHLEVEL = 0 | |
6 | BPF_EXTRAVERSION = 1 | |
7 | ||
8 | MAKEFLAGS += --no-print-directory | |
9 | ||
d5ef3140 | 10 | ifeq ($(srctree),) |
e19b7cee | 11 | srctree := $(patsubst %/,%,$(dir $(CURDIR))) |
d5ef3140 NR |
12 | srctree := $(patsubst %/,%,$(dir $(srctree))) |
13 | srctree := $(patsubst %/,%,$(dir $(srctree))) | |
14 | #$(info Determined 'srctree' to be $(srctree)) | |
15 | endif | |
1b76c13e WN |
16 | |
17 | # Makefiles suck: This macro sets a default value of $(2) for the | |
18 | # variable named by $(1), unless the variable has been set by | |
19 | # environment or command line. This is necessary for CC and AR | |
20 | # because make sets default values, so the simpler ?= approach | |
21 | # won't work as expected. | |
22 | define allow-override | |
23 | $(if $(or $(findstring environment,$(origin $(1))),\ | |
24 | $(findstring command line,$(origin $(1)))),,\ | |
25 | $(eval $(1) = $(2))) | |
26 | endef | |
27 | ||
28 | # Allow setting CC and AR, or setting CROSS_COMPILE as a prefix. | |
29 | $(call allow-override,CC,$(CROSS_COMPILE)gcc) | |
30 | $(call allow-override,AR,$(CROSS_COMPILE)ar) | |
31 | ||
32 | INSTALL = install | |
33 | ||
34 | # Use DESTDIR for installing into a different root directory. | |
35 | # This is useful for building a package. The program will be | |
36 | # installed in this directory as if it was the root directory. | |
37 | # Then the build tool can move it later. | |
38 | DESTDIR ?= | |
39 | DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))' | |
40 | ||
d5ef3140 NR |
41 | include $(srctree)/tools/scripts/Makefile.arch |
42 | ||
1b76c13e WN |
43 | ifeq ($(LP64), 1) |
44 | libdir_relative = lib64 | |
45 | else | |
46 | libdir_relative = lib | |
47 | endif | |
48 | ||
49 | prefix ?= /usr/local | |
50 | libdir = $(prefix)/$(libdir_relative) | |
51 | man_dir = $(prefix)/share/man | |
52 | man_dir_SQ = '$(subst ','\'',$(man_dir))' | |
53 | ||
54 | export man_dir man_dir_SQ INSTALL | |
55 | export DESTDIR DESTDIR_SQ | |
56 | ||
57 | include ../../scripts/Makefile.include | |
58 | ||
59 | # copy a bit from Linux kbuild | |
60 | ||
61 | ifeq ("$(origin V)", "command line") | |
62 | VERBOSE = $(V) | |
63 | endif | |
64 | ifndef VERBOSE | |
65 | VERBOSE = 0 | |
66 | endif | |
67 | ||
65f041be | 68 | FEATURE_USER = .libbpf |
20517cd9 ACM |
69 | FEATURE_TESTS = libelf libelf-getphdrnum libelf-mmap bpf |
70 | FEATURE_DISPLAY = libelf bpf | |
1b76c13e | 71 | |
971e827b | 72 | INCLUDES = -I. -I$(srctree)/tools/include -I$(srctree)/tools/arch/$(ARCH)/include/uapi -I$(srctree)/tools/include/uapi |
1b76c13e WN |
73 | FEATURE_CHECK_CFLAGS-bpf = $(INCLUDES) |
74 | ||
d8ad6a15 WN |
75 | check_feat := 1 |
76 | NON_CHECK_FEAT_TARGETS := clean TAGS tags cscope help | |
77 | ifdef MAKECMDGOALS | |
78 | ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),) | |
79 | check_feat := 0 | |
80 | endif | |
81 | endif | |
82 | ||
83 | ifeq ($(check_feat),1) | |
58683600 | 84 | ifeq ($(FEATURES_DUMP),) |
1b76c13e | 85 | include $(srctree)/tools/build/Makefile.feature |
58683600 JO |
86 | else |
87 | include $(FEATURES_DUMP) | |
88 | endif | |
d8ad6a15 | 89 | endif |
1b76c13e WN |
90 | |
91 | export prefix libdir src obj | |
92 | ||
93 | # Shell quotes | |
94 | libdir_SQ = $(subst ','\'',$(libdir)) | |
95 | libdir_relative_SQ = $(subst ','\'',$(libdir_relative)) | |
1b76c13e WN |
96 | |
97 | LIB_FILE = libbpf.a libbpf.so | |
98 | ||
99 | VERSION = $(BPF_VERSION) | |
100 | PATCHLEVEL = $(BPF_PATCHLEVEL) | |
101 | EXTRAVERSION = $(BPF_EXTRAVERSION) | |
102 | ||
103 | OBJ = $@ | |
104 | N = | |
105 | ||
106 | LIBBPF_VERSION = $(BPF_VERSION).$(BPF_PATCHLEVEL).$(BPF_EXTRAVERSION) | |
107 | ||
108 | # Set compile option CFLAGS | |
109 | ifdef EXTRA_CFLAGS | |
110 | CFLAGS := $(EXTRA_CFLAGS) | |
111 | else | |
112 | CFLAGS := -g -Wall | |
113 | endif | |
114 | ||
115 | ifeq ($(feature-libelf-mmap), 1) | |
116 | override CFLAGS += -DHAVE_LIBELF_MMAP_SUPPORT | |
117 | endif | |
118 | ||
119 | ifeq ($(feature-libelf-getphdrnum), 1) | |
120 | override CFLAGS += -DHAVE_ELF_GETPHDRNUM_SUPPORT | |
121 | endif | |
122 | ||
123 | # Append required CFLAGS | |
124 | override CFLAGS += $(EXTRA_WARNINGS) | |
125 | override CFLAGS += -Werror -Wall | |
126 | override CFLAGS += -fPIC | |
127 | override CFLAGS += $(INCLUDES) | |
128 | ||
129 | ifeq ($(VERBOSE),1) | |
130 | Q = | |
131 | else | |
132 | Q = @ | |
133 | endif | |
134 | ||
505d3085 | 135 | # Disable command line variables (CFLAGS) override from top |
1b76c13e WN |
136 | # level Makefile (perf), otherwise build Makefile will get |
137 | # the same command line setup. | |
138 | MAKEOVERRIDES= | |
139 | ||
7c422f55 JO |
140 | all: |
141 | ||
1b76c13e | 142 | export srctree OUTPUT CC LD CFLAGS V |
ab6201d0 | 143 | include $(srctree)/tools/build/Makefile.include |
1b76c13e WN |
144 | |
145 | BPF_IN := $(OUTPUT)libbpf-in.o | |
146 | LIB_FILE := $(addprefix $(OUTPUT),$(LIB_FILE)) | |
147 | ||
148 | CMD_TARGETS = $(LIB_FILE) | |
149 | ||
150 | TARGETS = $(CMD_TARGETS) | |
151 | ||
63c85910 | 152 | all: fixdep all_cmd |
1b76c13e WN |
153 | |
154 | all_cmd: $(CMD_TARGETS) | |
155 | ||
156 | $(BPF_IN): force elfdep bpfdep | |
f15d5e6d | 157 | @(test -f ../../include/uapi/linux/bpf.h -a -f ../../../include/uapi/linux/bpf.h && ( \ |
971e827b | 158 | (diff -B ../../include/uapi/linux/bpf.h ../../../include/uapi/linux/bpf.h >/dev/null) || \ |
8255e1ef | 159 | echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/bpf.h' differs from latest version at 'include/uapi/linux/bpf.h'" >&2 )) || true |
f15d5e6d | 160 | @(test -f ../../include/uapi/linux/bpf_common.h -a -f ../../../include/uapi/linux/bpf_common.h && ( \ |
971e827b | 161 | (diff -B ../../include/uapi/linux/bpf_common.h ../../../include/uapi/linux/bpf_common.h >/dev/null) || \ |
8255e1ef | 162 | echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/bpf_common.h' differs from latest version at 'include/uapi/linux/bpf_common.h'" >&2 )) || true |
dc2b9f19 EL |
163 | @(test -f ../../include/uapi/linux/netlink.h -a -f ../../../include/uapi/linux/netlink.h && ( \ |
164 | (diff -B ../../include/uapi/linux/netlink.h ../../../include/uapi/linux/netlink.h >/dev/null) || \ | |
165 | echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/netlink.h' differs from latest version at 'include/uapi/linux/netlink.h'" >&2 )) || true | |
166 | @(test -f ../../include/uapi/linux/if_link.h -a -f ../../../include/uapi/linux/if_link.h && ( \ | |
167 | (diff -B ../../include/uapi/linux/if_link.h ../../../include/uapi/linux/if_link.h >/dev/null) || \ | |
168 | echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/if_link.h' differs from latest version at 'include/uapi/linux/if_link.h'" >&2 )) || true | |
1b76c13e WN |
169 | $(Q)$(MAKE) $(build)=libbpf |
170 | ||
171 | $(OUTPUT)libbpf.so: $(BPF_IN) | |
172 | $(QUIET_LINK)$(CC) --shared $^ -o $@ | |
173 | ||
174 | $(OUTPUT)libbpf.a: $(BPF_IN) | |
175 | $(QUIET_LINK)$(RM) $@; $(AR) rcs $@ $^ | |
176 | ||
1b76c13e WN |
177 | define do_install |
178 | if [ ! -d '$(DESTDIR_SQ)$2' ]; then \ | |
179 | $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$2'; \ | |
180 | fi; \ | |
7110d80d | 181 | $(INSTALL) $1 $(if $3,-m $3,) '$(DESTDIR_SQ)$2' |
1b76c13e WN |
182 | endef |
183 | ||
184 | install_lib: all_cmd | |
185 | $(call QUIET_INSTALL, $(LIB_FILE)) \ | |
186 | $(call do_install,$(LIB_FILE),$(libdir_SQ)) | |
187 | ||
eb54e522 JK |
188 | install_headers: |
189 | $(call QUIET_INSTALL, headers) \ | |
7d386c62 JDB |
190 | $(call do_install,bpf.h,$(prefix)/include/bpf,644); \ |
191 | $(call do_install,libbpf.h,$(prefix)/include/bpf,644); | |
eb54e522 | 192 | |
1b76c13e WN |
193 | install: install_lib |
194 | ||
195 | ### Cleaning rules | |
196 | ||
197 | config-clean: | |
198 | $(call QUIET_CLEAN, config) | |
199 | $(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null | |
200 | ||
201 | clean: | |
63c85910 | 202 | $(call QUIET_CLEAN, libbpf) $(RM) *.o *~ $(TARGETS) *.a *.so .*.d .*.cmd \ |
1b76c13e | 203 | $(RM) LIBBPF-CFLAGS |
0c77c04a | 204 | $(call QUIET_CLEAN, core-gen) $(RM) $(OUTPUT)FEATURE-DUMP.libbpf |
1b76c13e WN |
205 | |
206 | ||
207 | ||
208 | PHONY += force elfdep bpfdep | |
209 | force: | |
210 | ||
211 | elfdep: | |
21567ede | 212 | @if [ "$(feature-libelf)" != "1" ]; then echo "No libelf found"; exit 1 ; fi |
1b76c13e WN |
213 | |
214 | bpfdep: | |
21567ede | 215 | @if [ "$(feature-bpf)" != "1" ]; then echo "BPF API too old"; exit 1 ; fi |
1b76c13e WN |
216 | |
217 | # Declare the contents of the .PHONY variable as phony. We keep that | |
218 | # information in a variable so we can use it in if_changed and friends. | |
219 | .PHONY: $(PHONY) |