1# SPDX-License-Identifier: GPL-2.0
2# trace-cmd version
3EP_VERSION = 1
4EP_PATCHLEVEL = 1
5EP_EXTRAVERSION = 0
6
7# file format version
8FILE_VERSION = 6
9
10MAKEFLAGS += --no-print-directory
11
12
13# Makefiles suck: This macro sets a default value of $(2) for the
14# variable named by $(1), unless the variable has been set by
15# environment or command line. This is necessary for CC and AR
16# because make sets default values, so the simpler ?= approach
17# won't work as expected.
18define allow-override
19  $(if $(or $(findstring environment,$(origin $(1))),\
20            $(findstring command line,$(origin $(1)))),,\
21    $(eval $(1) = $(2)))
22endef
23
24# Allow setting CC and AR, or setting CROSS_COMPILE as a prefix.
25$(call allow-override,CC,$(CROSS_COMPILE)gcc)
26$(call allow-override,AR,$(CROSS_COMPILE)ar)
27$(call allow-override,NM,$(CROSS_COMPILE)nm)
28
29EXT = -std=gnu99
30INSTALL = install
31
32# Use DESTDIR for installing into a different root directory.
33# This is useful for building a package. The program will be
34# installed in this directory as if it was the root directory.
35# Then the build tool can move it later.
36DESTDIR ?=
37DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))'
38
39LP64 := $(shell echo __LP64__ | ${CC} ${CFLAGS} -E -x c - | tail -n 1)
40ifeq ($(LP64), 1)
41  libdir_relative = lib64
42else
43  libdir_relative = lib
44endif
45
46prefix ?= /usr/local
47libdir = $(prefix)/$(libdir_relative)
48man_dir = $(prefix)/share/man
49man_dir_SQ = '$(subst ','\'',$(man_dir))'
50
51export man_dir man_dir_SQ INSTALL
52export DESTDIR DESTDIR_SQ
53
54set_plugin_dir := 1
55
56# Set plugin_dir to preffered global plugin location
57# If we install under $HOME directory we go under
58# $(HOME)/.traceevent/plugins
59#
60# We dont set PLUGIN_DIR in case we install under $HOME
61# directory, because by default the code looks under:
62# $(HOME)/.traceevent/plugins by default.
63#
64ifeq ($(plugin_dir),)
65ifeq ($(prefix),$(HOME))
66override plugin_dir = $(HOME)/.traceevent/plugins
67set_plugin_dir := 0
68else
69override plugin_dir = $(libdir)/traceevent/plugins
70endif
71endif
72
73ifeq ($(set_plugin_dir),1)
74PLUGIN_DIR = -DPLUGIN_DIR="$(plugin_dir)"
75PLUGIN_DIR_SQ = '$(subst ','\'',$(PLUGIN_DIR))'
76endif
77
78include ../../scripts/Makefile.include
79
80# copy a bit from Linux kbuild
81
82ifeq ("$(origin V)", "command line")
83  VERBOSE = $(V)
84endif
85ifndef VERBOSE
86  VERBOSE = 0
87endif
88
89ifeq ($(srctree),)
90srctree := $(patsubst %/,%,$(dir $(CURDIR)))
91srctree := $(patsubst %/,%,$(dir $(srctree)))
92srctree := $(patsubst %/,%,$(dir $(srctree)))
93#$(info Determined 'srctree' to be $(srctree))
94endif
95
96export prefix libdir src obj
97
98# Shell quotes
99libdir_SQ = $(subst ','\'',$(libdir))
100libdir_relative_SQ = $(subst ','\'',$(libdir_relative))
101plugin_dir_SQ = $(subst ','\'',$(plugin_dir))
102
103CONFIG_INCLUDES =
104CONFIG_LIBS	=
105CONFIG_FLAGS	=
106
107VERSION		= $(EP_VERSION)
108PATCHLEVEL	= $(EP_PATCHLEVEL)
109EXTRAVERSION	= $(EP_EXTRAVERSION)
110
111OBJ		= $@
112N		=
113
114EVENT_PARSE_VERSION = $(EP_VERSION).$(EP_PATCHLEVEL).$(EP_EXTRAVERSION)
115
116LIB_TARGET  = libtraceevent.a libtraceevent.so.$(EVENT_PARSE_VERSION)
117LIB_INSTALL = libtraceevent.a libtraceevent.so*
118
119INCLUDES = -I. -I $(srctree)/tools/include $(CONFIG_INCLUDES)
120
121# Set compile option CFLAGS
122ifdef EXTRA_CFLAGS
123  CFLAGS := $(EXTRA_CFLAGS)
124else
125  CFLAGS := -g -Wall
126endif
127
128# Append required CFLAGS
129override CFLAGS += -fPIC
130override CFLAGS += $(CONFIG_FLAGS) $(INCLUDES) $(PLUGIN_DIR_SQ)
131override CFLAGS += $(udis86-flags) -D_GNU_SOURCE
132
133ifeq ($(VERBOSE),1)
134  Q =
135else
136  Q = @
137endif
138
139# Disable command line variables (CFLAGS) override from top
140# level Makefile (perf), otherwise build Makefile will get
141# the same command line setup.
142MAKEOVERRIDES=
143
144export srctree OUTPUT CC LD CFLAGS V
145build := -f $(srctree)/tools/build/Makefile.build dir=. obj
146
147PLUGINS  = plugin_jbd2.so
148PLUGINS += plugin_hrtimer.so
149PLUGINS += plugin_kmem.so
150PLUGINS += plugin_kvm.so
151PLUGINS += plugin_mac80211.so
152PLUGINS += plugin_sched_switch.so
153PLUGINS += plugin_function.so
154PLUGINS += plugin_xen.so
155PLUGINS += plugin_scsi.so
156PLUGINS += plugin_cfg80211.so
157
158PLUGINS    := $(addprefix $(OUTPUT),$(PLUGINS))
159PLUGINS_IN := $(PLUGINS:.so=-in.o)
160
161TE_IN      := $(OUTPUT)libtraceevent-in.o
162LIB_TARGET := $(addprefix $(OUTPUT),$(LIB_TARGET))
163DYNAMIC_LIST_FILE := $(OUTPUT)libtraceevent-dynamic-list
164
165CMD_TARGETS = $(LIB_TARGET) $(PLUGINS) $(DYNAMIC_LIST_FILE)
166
167TARGETS = $(CMD_TARGETS)
168
169all: all_cmd
170
171all_cmd: $(CMD_TARGETS)
172
173$(TE_IN): force
174	$(Q)$(MAKE) $(build)=libtraceevent
175
176$(OUTPUT)libtraceevent.so.$(EVENT_PARSE_VERSION): $(TE_IN)
177	$(QUIET_LINK)$(CC) --shared $^ -Wl,-soname,libtraceevent.so.$(EP_VERSION) -o $@
178	@ln -sf $(@F) $(OUTPUT)libtraceevent.so
179	@ln -sf $(@F) $(OUTPUT)libtraceevent.so.$(EP_VERSION)
180
181$(OUTPUT)libtraceevent.a: $(TE_IN)
182	$(QUIET_LINK)$(RM) $@; $(AR) rcs $@ $^
183
184$(OUTPUT)libtraceevent-dynamic-list: $(PLUGINS)
185	$(QUIET_GEN)$(call do_generate_dynamic_list_file, $(PLUGINS), $@)
186
187plugins: $(PLUGINS)
188
189__plugin_obj = $(notdir $@)
190  plugin_obj = $(__plugin_obj:-in.o=)
191
192$(PLUGINS_IN): force
193	$(Q)$(MAKE) $(build)=$(plugin_obj)
194
195$(OUTPUT)%.so: $(OUTPUT)%-in.o
196	$(QUIET_LINK)$(CC) $(CFLAGS) -shared -nostartfiles -o $@ $^
197
198define make_version.h
199  (echo '/* This file is automatically generated. Do not modify. */';		\
200   echo \#define VERSION_CODE $(shell						\
201   expr $(VERSION) \* 256 + $(PATCHLEVEL));					\
202   echo '#define EXTRAVERSION ' $(EXTRAVERSION);				\
203   echo '#define VERSION_STRING "'$(VERSION).$(PATCHLEVEL).$(EXTRAVERSION)'"';	\
204   echo '#define FILE_VERSION '$(FILE_VERSION);					\
205  ) > $1
206endef
207
208define update_version.h
209  ($(call make_version.h, $@.tmp);		\
210    if [ -r $@ ] && cmp -s $@ $@.tmp; then	\
211      rm -f $@.tmp;				\
212    else					\
213      echo '  UPDATE                 $@';	\
214      mv -f $@.tmp $@;				\
215    fi);
216endef
217
218ep_version.h: force
219	$(Q)$(N)$(call update_version.h)
220
221VERSION_FILES = ep_version.h
222
223define update_dir
224  (echo $1 > $@.tmp;				\
225   if [ -r $@ ] && cmp -s $@ $@.tmp; then	\
226     rm -f $@.tmp;				\
227   else						\
228     echo '  UPDATE                 $@';	\
229     mv -f $@.tmp $@;				\
230   fi);
231endef
232
233tags:	force
234	$(RM) tags
235	find . -name '*.[ch]' | xargs ctags --extra=+f --c-kinds=+px \
236	--regex-c++='/_PE\(([^,)]*).*/TEP_ERRNO__\1/'
237
238TAGS:	force
239	$(RM) TAGS
240	find . -name '*.[ch]' | xargs etags \
241	--regex='/_PE(\([^,)]*\).*/TEP_ERRNO__\1/'
242
243define do_install_mkdir
244	if [ ! -d '$(DESTDIR_SQ)$1' ]; then		\
245		$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$1';	\
246	fi
247endef
248
249define do_install
250	$(call do_install_mkdir,$2);			\
251	$(INSTALL) $(if $3,-m $3,) $1 '$(DESTDIR_SQ)$2'
252endef
253
254define do_install_plugins
255	for plugin in $1; do				\
256	  $(call do_install,$$plugin,$(plugin_dir_SQ));	\
257	done
258endef
259
260define do_generate_dynamic_list_file
261	symbol_type=`$(NM) -u -D $1 | awk 'NF>1 {print $$1}' | \
262	xargs echo "U W w" | tr ' ' '\n' | sort -u | xargs echo`;\
263	if [ "$$symbol_type" = "U W w" ];then				\
264		(echo '{';						\
265		$(NM) -u -D $1 | awk 'NF>1 {print "\t"$$2";"}' | sort -u;\
266		echo '};';						\
267		) > $2;							\
268	else								\
269		(echo Either missing one of [$1] or bad version of $(NM)) 1>&2;\
270	fi
271endef
272
273install_lib: all_cmd install_plugins
274	$(call QUIET_INSTALL, $(LIB_TARGET)) \
275		$(call do_install_mkdir,$(libdir_SQ)); \
276		cp -fpR $(LIB_INSTALL) $(DESTDIR)$(libdir_SQ)
277
278install_plugins: $(PLUGINS)
279	$(call QUIET_INSTALL, trace_plugins) \
280		$(call do_install_plugins, $(PLUGINS))
281
282install_headers:
283	$(call QUIET_INSTALL, headers) \
284		$(call do_install,event-parse.h,$(prefix)/include/traceevent,644); \
285		$(call do_install,event-utils.h,$(prefix)/include/traceevent,644); \
286		$(call do_install,kbuffer.h,$(prefix)/include/traceevent,644)
287
288install: install_lib
289
290clean:
291	$(call QUIET_CLEAN, libtraceevent) \
292		$(RM) *.o *~ $(TARGETS) *.a *.so $(VERSION_FILES) .*.d .*.cmd \
293		$(RM) TRACEEVENT-CFLAGS tags TAGS
294
295PHONY += force plugins
296force:
297
298# Declare the contents of the .PHONY variable as phony.  We keep that
299# information in a variable so we can use it in if_changed and friends.
300.PHONY: $(PHONY)
301