tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1# file format version
2FILE_VERSION = 1
3
4LIBLOCKDEP_VERSION=$(shell make --no-print-directory -sC ../../.. kernelversion)
5
6# Makefiles suck: This macro sets a default value of $(2) for the
7# variable named by $(1), unless the variable has been set by
8# environment or command line. This is necessary for CC and AR
9# because make sets default values, so the simpler ?= approach
10# won't work as expected.
11define allow-override
12 $(if $(or $(findstring environment,$(origin $(1))),\
13 $(findstring command line,$(origin $(1)))),,\
14 $(eval $(1) = $(2)))
15endef
16
17# Allow setting CC and AR, or setting CROSS_COMPILE as a prefix.
18$(call allow-override,CC,$(CROSS_COMPILE)gcc)
19$(call allow-override,AR,$(CROSS_COMPILE)ar)
20
21INSTALL = install
22
23# Use DESTDIR for installing into a different root directory.
24# This is useful for building a package. The program will be
25# installed in this directory as if it was the root directory.
26# Then the build tool can move it later.
27DESTDIR ?=
28DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))'
29
30prefix ?= /usr/local
31libdir_relative = lib
32libdir = $(prefix)/$(libdir_relative)
33bindir_relative = bin
34bindir = $(prefix)/$(bindir_relative)
35
36export DESTDIR DESTDIR_SQ INSTALL
37
38# copy a bit from Linux kbuild
39
40ifeq ("$(origin V)", "command line")
41 VERBOSE = $(V)
42endif
43ifndef VERBOSE
44 VERBOSE = 0
45endif
46
47ifeq ("$(origin O)", "command line")
48 BUILD_OUTPUT := $(O)
49endif
50
51ifeq ($(BUILD_SRC),)
52ifneq ($(BUILD_OUTPUT),)
53
54define build_output
55 $(if $(VERBOSE:1=),@)$(MAKE) -C $(BUILD_OUTPUT) \
56 BUILD_SRC=$(CURDIR) -f $(CURDIR)/Makefile $1
57endef
58
59saved-output := $(BUILD_OUTPUT)
60BUILD_OUTPUT := $(shell cd $(BUILD_OUTPUT) && /bin/pwd)
61$(if $(BUILD_OUTPUT),, \
62 $(error output directory "$(saved-output)" does not exist))
63
64all: sub-make
65
66gui: force
67 $(call build_output, all_cmd)
68
69$(filter-out gui,$(MAKECMDGOALS)): sub-make
70
71sub-make: force
72 $(call build_output, $(MAKECMDGOALS))
73
74
75# Leave processing to above invocation of make
76skip-makefile := 1
77
78endif # BUILD_OUTPUT
79endif # BUILD_SRC
80
81# We process the rest of the Makefile if this is the final invocation of make
82ifeq ($(skip-makefile),)
83
84srctree := $(realpath $(if $(BUILD_SRC),$(BUILD_SRC),$(CURDIR)))
85objtree := $(realpath $(CURDIR))
86src := $(srctree)
87obj := $(objtree)
88
89export prefix libdir bindir src obj
90
91# Shell quotes
92libdir_SQ = $(subst ','\'',$(libdir))
93bindir_SQ = $(subst ','\'',$(bindir))
94
95LIB_FILE = liblockdep.a liblockdep.so.$(LIBLOCKDEP_VERSION)
96BIN_FILE = lockdep
97
98CONFIG_INCLUDES =
99CONFIG_LIBS =
100CONFIG_FLAGS =
101
102OBJ = $@
103N =
104
105export Q VERBOSE
106
107INCLUDES = -I. -I/usr/local/include -I./uinclude -I./include -I../../include $(CONFIG_INCLUDES)
108
109# Set compile option CFLAGS if not set elsewhere
110CFLAGS ?= -g -DCONFIG_LOCKDEP -DCONFIG_STACKTRACE -DCONFIG_PROVE_LOCKING -DBITS_PER_LONG=__WORDSIZE -DLIBLOCKDEP_VERSION='"$(LIBLOCKDEP_VERSION)"' -rdynamic -O0 -g
111
112override CFLAGS += $(CONFIG_FLAGS) $(INCLUDES) $(PLUGIN_DIR_SQ)
113
114ifeq ($(VERBOSE),1)
115 Q =
116 print_compile =
117 print_app_build =
118 print_fpic_compile =
119 print_shared_lib_compile =
120 print_install =
121else
122 Q = @
123 print_compile = echo ' CC '$(OBJ);
124 print_app_build = echo ' BUILD '$(OBJ);
125 print_fpic_compile = echo ' CC FPIC '$(OBJ);
126 print_shared_lib_compile = echo ' BUILD SHARED LIB '$(OBJ);
127 print_static_lib_build = echo ' BUILD STATIC LIB '$(OBJ);
128 print_install = echo ' INSTALL '$1' to $(DESTDIR_SQ)$2';
129endif
130
131do_fpic_compile = \
132 ($(print_fpic_compile) \
133 $(CC) -c $(CFLAGS) $(EXT) -fPIC $< -o $@)
134
135do_app_build = \
136 ($(print_app_build) \
137 $(CC) $^ -rdynamic -o $@ $(CONFIG_LIBS) $(LIBS))
138
139do_compile_shared_library = \
140 ($(print_shared_lib_compile) \
141 $(CC) --shared $^ -o $@ -lpthread -ldl -Wl,-soname='"$@"';$(shell ln -s $@ liblockdep.so))
142
143do_build_static_lib = \
144 ($(print_static_lib_build) \
145 $(RM) $@; $(AR) rcs $@ $^)
146
147
148define do_compile
149 $(print_compile) \
150 $(CC) -c $(CFLAGS) $(EXT) $< -o $(obj)/$@;
151endef
152
153$(obj)/%.o: $(src)/%.c
154 $(Q)$(call do_compile)
155
156%.o: $(src)/%.c
157 $(Q)$(call do_compile)
158
159PEVENT_LIB_OBJS = common.o lockdep.o preload.o rbtree.o
160
161ALL_OBJS = $(PEVENT_LIB_OBJS)
162
163CMD_TARGETS = $(LIB_FILE)
164
165TARGETS = $(CMD_TARGETS)
166
167
168all: all_cmd
169
170all_cmd: $(CMD_TARGETS)
171
172liblockdep.so.$(LIBLOCKDEP_VERSION): $(PEVENT_LIB_OBJS)
173 $(Q)$(do_compile_shared_library)
174
175liblockdep.a: $(PEVENT_LIB_OBJS)
176 $(Q)$(do_build_static_lib)
177
178$(PEVENT_LIB_OBJS): %.o: $(src)/%.c
179 $(Q)$(do_fpic_compile)
180
181## make deps
182
183all_objs := $(sort $(ALL_OBJS))
184all_deps := $(all_objs:%.o=.%.d)
185
186# let .d file also depends on the source and header files
187define check_deps
188 @set -e; $(RM) $@; \
189 $(CC) -MM $(CFLAGS) $< > $@.$$$$; \
190 sed 's,\($*\)\.o[ :]*,\1.o $@ : ,g' < $@.$$$$ > $@; \
191 $(RM) $@.$$$$
192endef
193
194$(all_deps): .%.d: $(src)/%.c
195 $(Q)$(call check_deps)
196
197$(all_objs) : %.o : .%.d
198
199dep_includes := $(wildcard $(all_deps))
200
201ifneq ($(dep_includes),)
202 include $(dep_includes)
203endif
204
205### Detect environment changes
206TRACK_CFLAGS = $(subst ','\'',$(CFLAGS)):$(ARCH):$(CROSS_COMPILE)
207
208tags: force
209 $(RM) tags
210 find . -name '*.[ch]' | xargs ctags --extra=+f --c-kinds=+px \
211 --regex-c++='/_PE\(([^,)]*).*/PEVENT_ERRNO__\1/'
212
213TAGS: force
214 $(RM) TAGS
215 find . -name '*.[ch]' | xargs etags \
216 --regex='/_PE(\([^,)]*\).*/PEVENT_ERRNO__\1/'
217
218define do_install
219 $(print_install) \
220 if [ ! -d '$(DESTDIR_SQ)$2' ]; then \
221 $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$2'; \
222 fi; \
223 $(INSTALL) $1 '$(DESTDIR_SQ)$2'
224endef
225
226install_lib: all_cmd
227 $(Q)$(call do_install,$(LIB_FILE),$(libdir_SQ))
228 $(Q)$(call do_install,$(BIN_FILE),$(bindir_SQ))
229
230install: install_lib
231
232clean:
233 $(RM) *.o *~ $(TARGETS) *.a *liblockdep*.so* $(VERSION_FILES) .*.d
234 $(RM) tags TAGS
235
236endif # skip-makefile
237
238PHONY += force
239force:
240
241# Declare the contents of the .PHONY variable as phony. We keep that
242# information in a variable so we can use it in if_changed and friends.
243.PHONY: $(PHONY)