Commit | Line | Data |
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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 | ||
9 | ||
10 | # Makefiles suck: This macro sets a default value of $(2) for the | |
11 | # variable named by $(1), unless the variable has been set by | |
12 | # environment or command line. This is necessary for CC and AR | |
13 | # because make sets default values, so the simpler ?= approach | |
14 | # won't work as expected. | |
15 | define allow-override | |
16 | $(if $(or $(findstring environment,$(origin $(1))),\ | |
17 | $(findstring command line,$(origin $(1)))),,\ | |
18 | $(eval $(1) = $(2))) | |
19 | endef | |
20 | ||
21 | # Allow setting CC and AR, or setting CROSS_COMPILE as a prefix. | |
22 | $(call allow-override,CC,$(CROSS_COMPILE)gcc) | |
23 | $(call allow-override,AR,$(CROSS_COMPILE)ar) | |
24 | ||
25 | INSTALL = install | |
26 | ||
27 | # Use DESTDIR for installing into a different root directory. | |
28 | # This is useful for building a package. The program will be | |
29 | # installed in this directory as if it was the root directory. | |
30 | # Then the build tool can move it later. | |
31 | DESTDIR ?= | |
32 | DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))' | |
33 | ||
34 | LP64 := $(shell echo __LP64__ | ${CC} ${CFLAGS} -E -x c - | tail -n 1) | |
35 | ifeq ($(LP64), 1) | |
36 | libdir_relative = lib64 | |
37 | else | |
38 | libdir_relative = lib | |
39 | endif | |
40 | ||
41 | prefix ?= /usr/local | |
42 | libdir = $(prefix)/$(libdir_relative) | |
43 | man_dir = $(prefix)/share/man | |
44 | man_dir_SQ = '$(subst ','\'',$(man_dir))' | |
45 | ||
46 | export man_dir man_dir_SQ INSTALL | |
47 | export DESTDIR DESTDIR_SQ | |
48 | ||
49 | include ../../scripts/Makefile.include | |
50 | ||
51 | # copy a bit from Linux kbuild | |
52 | ||
53 | ifeq ("$(origin V)", "command line") | |
54 | VERBOSE = $(V) | |
55 | endif | |
56 | ifndef VERBOSE | |
57 | VERBOSE = 0 | |
58 | endif | |
59 | ||
60 | ifeq ($(srctree),) | |
61 | srctree := $(patsubst %/,%,$(dir $(shell pwd))) | |
62 | srctree := $(patsubst %/,%,$(dir $(srctree))) | |
63 | srctree := $(patsubst %/,%,$(dir $(srctree))) | |
64 | #$(info Determined 'srctree' to be $(srctree)) | |
65 | endif | |
66 | ||
65f041be | 67 | FEATURE_USER = .libbpf |
20517cd9 ACM |
68 | FEATURE_TESTS = libelf libelf-getphdrnum libelf-mmap bpf |
69 | FEATURE_DISPLAY = libelf bpf | |
1b76c13e WN |
70 | |
71 | INCLUDES = -I. -I$(srctree)/tools/include -I$(srctree)/arch/$(ARCH)/include/uapi -I$(srctree)/include/uapi | |
72 | FEATURE_CHECK_CFLAGS-bpf = $(INCLUDES) | |
73 | ||
74 | include $(srctree)/tools/build/Makefile.feature | |
75 | ||
76 | export prefix libdir src obj | |
77 | ||
78 | # Shell quotes | |
79 | libdir_SQ = $(subst ','\'',$(libdir)) | |
80 | libdir_relative_SQ = $(subst ','\'',$(libdir_relative)) | |
81 | plugin_dir_SQ = $(subst ','\'',$(plugin_dir)) | |
82 | ||
83 | LIB_FILE = libbpf.a libbpf.so | |
84 | ||
85 | VERSION = $(BPF_VERSION) | |
86 | PATCHLEVEL = $(BPF_PATCHLEVEL) | |
87 | EXTRAVERSION = $(BPF_EXTRAVERSION) | |
88 | ||
89 | OBJ = $@ | |
90 | N = | |
91 | ||
92 | LIBBPF_VERSION = $(BPF_VERSION).$(BPF_PATCHLEVEL).$(BPF_EXTRAVERSION) | |
93 | ||
94 | # Set compile option CFLAGS | |
95 | ifdef EXTRA_CFLAGS | |
96 | CFLAGS := $(EXTRA_CFLAGS) | |
97 | else | |
98 | CFLAGS := -g -Wall | |
99 | endif | |
100 | ||
101 | ifeq ($(feature-libelf-mmap), 1) | |
102 | override CFLAGS += -DHAVE_LIBELF_MMAP_SUPPORT | |
103 | endif | |
104 | ||
105 | ifeq ($(feature-libelf-getphdrnum), 1) | |
106 | override CFLAGS += -DHAVE_ELF_GETPHDRNUM_SUPPORT | |
107 | endif | |
108 | ||
109 | # Append required CFLAGS | |
110 | override CFLAGS += $(EXTRA_WARNINGS) | |
111 | override CFLAGS += -Werror -Wall | |
112 | override CFLAGS += -fPIC | |
113 | override CFLAGS += $(INCLUDES) | |
114 | ||
115 | ifeq ($(VERBOSE),1) | |
116 | Q = | |
117 | else | |
118 | Q = @ | |
119 | endif | |
120 | ||
121 | # Disable command line variables (CFLAGS) overide from top | |
122 | # level Makefile (perf), otherwise build Makefile will get | |
123 | # the same command line setup. | |
124 | MAKEOVERRIDES= | |
125 | ||
7c422f55 JO |
126 | all: |
127 | ||
1b76c13e | 128 | export srctree OUTPUT CC LD CFLAGS V |
ab6201d0 | 129 | include $(srctree)/tools/build/Makefile.include |
1b76c13e WN |
130 | |
131 | BPF_IN := $(OUTPUT)libbpf-in.o | |
132 | LIB_FILE := $(addprefix $(OUTPUT),$(LIB_FILE)) | |
133 | ||
134 | CMD_TARGETS = $(LIB_FILE) | |
135 | ||
136 | TARGETS = $(CMD_TARGETS) | |
137 | ||
7c422f55 | 138 | all: fixdep $(VERSION_FILES) all_cmd |
1b76c13e WN |
139 | |
140 | all_cmd: $(CMD_TARGETS) | |
141 | ||
142 | $(BPF_IN): force elfdep bpfdep | |
143 | $(Q)$(MAKE) $(build)=libbpf | |
144 | ||
145 | $(OUTPUT)libbpf.so: $(BPF_IN) | |
146 | $(QUIET_LINK)$(CC) --shared $^ -o $@ | |
147 | ||
148 | $(OUTPUT)libbpf.a: $(BPF_IN) | |
149 | $(QUIET_LINK)$(RM) $@; $(AR) rcs $@ $^ | |
150 | ||
151 | define update_dir | |
152 | (echo $1 > $@.tmp; \ | |
153 | if [ -r $@ ] && cmp -s $@ $@.tmp; then \ | |
154 | rm -f $@.tmp; \ | |
155 | else \ | |
156 | echo ' UPDATE $@'; \ | |
157 | mv -f $@.tmp $@; \ | |
158 | fi); | |
159 | endef | |
160 | ||
161 | define do_install | |
162 | if [ ! -d '$(DESTDIR_SQ)$2' ]; then \ | |
163 | $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$2'; \ | |
164 | fi; \ | |
165 | $(INSTALL) $1 '$(DESTDIR_SQ)$2' | |
166 | endef | |
167 | ||
168 | install_lib: all_cmd | |
169 | $(call QUIET_INSTALL, $(LIB_FILE)) \ | |
170 | $(call do_install,$(LIB_FILE),$(libdir_SQ)) | |
171 | ||
172 | install: install_lib | |
173 | ||
174 | ### Cleaning rules | |
175 | ||
176 | config-clean: | |
177 | $(call QUIET_CLEAN, config) | |
178 | $(Q)$(MAKE) -C $(srctree)/tools/build/feature/ clean >/dev/null | |
179 | ||
180 | clean: | |
181 | $(call QUIET_CLEAN, libbpf) $(RM) *.o *~ $(TARGETS) *.a *.so $(VERSION_FILES) .*.d \ | |
182 | $(RM) LIBBPF-CFLAGS | |
183 | $(call QUIET_CLEAN, core-gen) $(RM) $(OUTPUT)FEATURE-DUMP | |
184 | ||
185 | ||
186 | ||
187 | PHONY += force elfdep bpfdep | |
188 | force: | |
189 | ||
190 | elfdep: | |
191 | @if [ "$(feature-libelf)" != "1" ]; then echo "No libelf found"; exit -1 ; fi | |
192 | ||
193 | bpfdep: | |
194 | @if [ "$(feature-bpf)" != "1" ]; then echo "BPF API too old"; exit -1 ; fi | |
195 | ||
196 | # Declare the contents of the .PHONY variable as phony. We keep that | |
197 | # information in a variable so we can use it in if_changed and friends. | |
198 | .PHONY: $(PHONY) |