Commit | Line | Data |
---|---|---|
1b76c13e WN |
1 | # Most of this file is copied from tools/lib/traceevent/Makefile |
2 | ||
3 | BPF_VERSION = 0 | |
4 | BPF_PATCHLEVEL = 0 | |
5 | BPF_EXTRAVERSION = 1 | |
6 | ||
7 | MAKEFLAGS += --no-print-directory | |
8 | ||
d5ef3140 NR |
9 | ifeq ($(srctree),) |
10 | srctree := $(patsubst %/,%,$(dir $(shell pwd))) | |
11 | srctree := $(patsubst %/,%,$(dir $(srctree))) | |
12 | srctree := $(patsubst %/,%,$(dir $(srctree))) | |
13 | #$(info Determined 'srctree' to be $(srctree)) | |
14 | endif | |
1b76c13e WN |
15 | |
16 | # Makefiles suck: This macro sets a default value of $(2) for the | |
17 | # variable named by $(1), unless the variable has been set by | |
18 | # environment or command line. This is necessary for CC and AR | |
19 | # because make sets default values, so the simpler ?= approach | |
20 | # won't work as expected. | |
21 | define allow-override | |
22 | $(if $(or $(findstring environment,$(origin $(1))),\ | |
23 | $(findstring command line,$(origin $(1)))),,\ | |
24 | $(eval $(1) = $(2))) | |
25 | endef | |
26 | ||
27 | # Allow setting CC and AR, or setting CROSS_COMPILE as a prefix. | |
28 | $(call allow-override,CC,$(CROSS_COMPILE)gcc) | |
29 | $(call allow-override,AR,$(CROSS_COMPILE)ar) | |
30 | ||
31 | INSTALL = install | |
32 | ||
33 | # Use DESTDIR for installing into a different root directory. | |
34 | # This is useful for building a package. The program will be | |
35 | # installed in this directory as if it was the root directory. | |
36 | # Then the build tool can move it later. | |
37 | DESTDIR ?= | |
38 | DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))' | |
39 | ||
d5ef3140 NR |
40 | include $(srctree)/tools/scripts/Makefile.arch |
41 | ||
1b76c13e WN |
42 | ifeq ($(LP64), 1) |
43 | libdir_relative = lib64 | |
44 | else | |
45 | libdir_relative = lib | |
46 | endif | |
47 | ||
48 | prefix ?= /usr/local | |
49 | libdir = $(prefix)/$(libdir_relative) | |
50 | man_dir = $(prefix)/share/man | |
51 | man_dir_SQ = '$(subst ','\'',$(man_dir))' | |
52 | ||
53 | export man_dir man_dir_SQ INSTALL | |
54 | export DESTDIR DESTDIR_SQ | |
55 | ||
56 | include ../../scripts/Makefile.include | |
57 | ||
58 | # copy a bit from Linux kbuild | |
59 | ||
60 | ifeq ("$(origin V)", "command line") | |
61 | VERBOSE = $(V) | |
62 | endif | |
63 | ifndef VERBOSE | |
64 | VERBOSE = 0 | |
65 | endif | |
66 | ||
65f041be | 67 | FEATURE_USER = .libbpf |
20517cd9 ACM |
68 | FEATURE_TESTS = libelf libelf-getphdrnum libelf-mmap bpf |
69 | FEATURE_DISPLAY = libelf bpf | |
1b76c13e | 70 | |
971e827b | 71 | INCLUDES = -I. -I$(srctree)/tools/include -I$(srctree)/tools/arch/$(ARCH)/include/uapi -I$(srctree)/tools/include/uapi |
1b76c13e WN |
72 | FEATURE_CHECK_CFLAGS-bpf = $(INCLUDES) |
73 | ||
d8ad6a15 WN |
74 | check_feat := 1 |
75 | NON_CHECK_FEAT_TARGETS := clean TAGS tags cscope help | |
76 | ifdef MAKECMDGOALS | |
77 | ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),) | |
78 | check_feat := 0 | |
79 | endif | |
80 | endif | |
81 | ||
82 | ifeq ($(check_feat),1) | |
58683600 | 83 | ifeq ($(FEATURES_DUMP),) |
1b76c13e | 84 | include $(srctree)/tools/build/Makefile.feature |
58683600 JO |
85 | else |
86 | include $(FEATURES_DUMP) | |
87 | endif | |
d8ad6a15 | 88 | endif |
1b76c13e WN |
89 | |
90 | export prefix libdir src obj | |
91 | ||
92 | # Shell quotes | |
93 | libdir_SQ = $(subst ','\'',$(libdir)) | |
94 | libdir_relative_SQ = $(subst ','\'',$(libdir_relative)) | |
95 | plugin_dir_SQ = $(subst ','\'',$(plugin_dir)) | |
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 | ||
135 | # Disable command line variables (CFLAGS) overide from top | |
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 | ||
7c422f55 | 152 | all: fixdep $(VERSION_FILES) all_cmd |
1b76c13e WN |
153 | |
154 | all_cmd: $(CMD_TARGETS) | |
155 | ||
156 | $(BPF_IN): force elfdep bpfdep | |
971e827b ACM |
157 | @(test -f ../../../include/uapi/linux/bpf.h -a -f ../../../include/uapi/linux/bpf.h && ( \ |
158 | (diff -B ../../include/uapi/linux/bpf.h ../../../include/uapi/linux/bpf.h >/dev/null) || \ | |
159 | echo "Warning: tools/include/uapi/linux/bpf.h differs from kernel" >&2 )) || true | |
160 | @(test -f ../../../include/uapi/linux/bpf_common.h -a -f ../../../include/uapi/linux/bpf_common.h && ( \ | |
161 | (diff -B ../../include/uapi/linux/bpf_common.h ../../../include/uapi/linux/bpf_common.h >/dev/null) || \ | |
162 | echo "Warning: tools/include/uapi/linux/bpf_common.h differs from kernel" >&2 )) || true | |
1b76c13e WN |
163 | $(Q)$(MAKE) $(build)=libbpf |
164 | ||
165 | $(OUTPUT)libbpf.so: $(BPF_IN) | |
166 | $(QUIET_LINK)$(CC) --shared $^ -o $@ | |
167 | ||
168 | $(OUTPUT)libbpf.a: $(BPF_IN) | |
169 | $(QUIET_LINK)$(RM) $@; $(AR) rcs $@ $^ | |
170 | ||
171 | define update_dir | |
172 | (echo $1 > $@.tmp; \ | |
173 | if [ -r $@ ] && cmp -s $@ $@.tmp; then \ | |
174 | rm -f $@.tmp; \ | |
175 | else \ | |
176 | echo ' UPDATE $@'; \ | |
177 | mv -f $@.tmp $@; \ | |
178 | fi); | |
179 | endef | |
180 | ||
181 | define do_install | |
182 | if [ ! -d '$(DESTDIR_SQ)$2' ]; then \ | |
183 | $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$2'; \ | |
184 | fi; \ | |
185 | $(INSTALL) $1 '$(DESTDIR_SQ)$2' | |
186 | endef | |
187 | ||
188 | install_lib: all_cmd | |
189 | $(call QUIET_INSTALL, $(LIB_FILE)) \ | |
190 | $(call do_install,$(LIB_FILE),$(libdir_SQ)) | |
191 | ||
192 | install: install_lib | |
193 | ||
194 | ### Cleaning rules | |
195 | ||
196 | config-clean: | |
197 | $(call QUIET_CLEAN, config) | |
198 | $(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null | |
199 | ||
200 | clean: | |
22992a32 | 201 | $(call QUIET_CLEAN, libbpf) $(RM) *.o *~ $(TARGETS) *.a *.so $(VERSION_FILES) .*.d .*.cmd \ |
1b76c13e | 202 | $(RM) LIBBPF-CFLAGS |
0c77c04a | 203 | $(call QUIET_CLEAN, core-gen) $(RM) $(OUTPUT)FEATURE-DUMP.libbpf |
1b76c13e WN |
204 | |
205 | ||
206 | ||
207 | PHONY += force elfdep bpfdep | |
208 | force: | |
209 | ||
210 | elfdep: | |
211 | @if [ "$(feature-libelf)" != "1" ]; then echo "No libelf found"; exit -1 ; fi | |
212 | ||
213 | bpfdep: | |
214 | @if [ "$(feature-bpf)" != "1" ]; then echo "BPF API too old"; exit -1 ; fi | |
215 | ||
216 | # Declare the contents of the .PHONY variable as phony. We keep that | |
217 | # information in a variable so we can use it in if_changed and friends. | |
218 | .PHONY: $(PHONY) |