Makefile - pub/scm/libs/libtrace/libtracefs - Git at Google

 # SPDX-License-Identifier: LGPL-2.1
 # libtracefs version
 TFS_VERSION = 1
 TFS_PATCHLEVEL = 3
 TFS_EXTRAVERSION = dev
 TRACEFS_VERSION = $(TFS_VERSION).$(TFS_PATCHLEVEL).$(TFS_EXTRAVERSION)

 export TFS_VERSION
 export TFS_PATCHLEVEL
 export TFS_EXTRAVERSION
 export TRACEFS_VERSION

 LIBTRACEEVENT_MIN_VERSION = 1.3

 # taken from trace-cmd
 MAKEFLAGS += --no-print-directory

 # Makefiles suck: This macro sets a default value of $(2) for the
 # variable named by $(1), unless the variable has been set by
 # environment or command line. This is necessary for CC and AR
 # because make sets default values, so the simpler ?= approach
 # won't work as expected.
 define allow-override
   $(if $(or $(findstring environment,$(origin $(1))),\
             $(findstring command line,$(origin $(1)))),,\
     $(eval $(1) = $(2)))
 endef

 # Allow setting CC and AR, or setting CROSS_COMPILE as a prefix.
 $(call allow-override,CC,$(CROSS_COMPILE)gcc)
 $(call allow-override,AR,$(CROSS_COMPILE)ar)
 $(call allow-override,PKG_CONFIG,pkg-config)
 $(call allow-override,LD_SO_CONF_PATH,/etc/ld.so.conf.d/)
 $(call allow-override,LDCONFIG,ldconfig)

 EXT = -std=gnu99
 INSTALL = install

 # Use DESTDIR for installing into a different root directory.
 # This is useful for building a package. The program will be
 # installed in this directory as if it was the root directory.
 # Then the build tool can move it later.
 DESTDIR ?=
 DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))'

 LP64 := $(shell echo __LP64__ | ${CC} ${CFLAGS} -E -x c - | tail -n 1)
 ifeq ($(LP64), 1)
   libdir_relative_temp = lib64
 else
   libdir_relative_temp = lib
 endif

 libdir_relative ?= $(libdir_relative_temp)
 prefix ?= /usr/local
 man_dir = $(prefix)/share/man
 man_dir_SQ = '$(subst ','\'',$(man_dir))'
 libdir = $(prefix)/$(libdir_relative)
 libdir_SQ = '$(subst ','\'',$(libdir))'
 includedir_relative ?= include/tracefs
 includedir = $(prefix)/$(includedir_relative)
 includedir_SQ = '$(subst ','\'',$(includedir))'
 pkgconfig_dir ?= $(word 1,$(shell $(PKG_CONFIG) 		\
 			--variable pc_path pkg-config | tr ":" " "))

 TEST_LIBTRACEEVENT = $(shell sh -c "$(PKG_CONFIG) --atleast-version $(LIBTRACEEVENT_MIN_VERSION) libtraceevent > /dev/null 2>&1 && echo y")

 ifeq ("$(TEST_LIBTRACEEVENT)", "y")
 LIBTRACEEVENT_INCLUDES = $(shell sh -c "$(PKG_CONFIG) --cflags libtraceevent")
 LIBTRACEEVENT_LIBS = $(shell sh -c "$(PKG_CONFIG) --libs libtraceevent")
 else
  ifneq ($(MAKECMDGOALS),clean)
    $(error libtraceevent.so minimum version of $(LIBTRACEEVENT_MIN_VERSION) not installed)
  endif
 endif

 etcdir ?= /etc
 etcdir_SQ = '$(subst ','\'',$(etcdir))'

 export man_dir man_dir_SQ html_install html_install_SQ INSTALL
 export img_install img_install_SQ
 export DESTDIR DESTDIR_SQ

 pound := \#

 HELP_DIR = -DHELP_DIR=$(html_install)
 HELP_DIR_SQ = '$(subst ','\'',$(HELP_DIR))'
 #' emacs highlighting gets confused by the above escaped quote.

 BASH_COMPLETE_DIR ?= $(etcdir)/bash_completion.d

 # copy a bit from Linux kbuild

 ifeq ("$(origin V)", "command line")
   VERBOSE = $(V)
 endif
 ifndef VERBOSE
   VERBOSE = 0
 endif

 SILENT := $(if $(findstring s,$(filter-out --%,$(MAKEFLAGS))),1)

 # $(call test-build, snippet, ret) -> ret if snippet compiles
 #                                  -> empty otherwise
 test-build = $(if $(shell sh -c 'echo "$(1)" | \
 	$(CC) -o /dev/null -c -x c - > /dev/null 2>&1 && echo y'), $2)

 ifeq ("$(origin O)", "command line")

   saved-output := $(O)
   BUILD_OUTPUT := $(shell cd $(O) && /bin/pwd)
   $(if $(BUILD_OUTPUT),, \
     $(error output directory "$(saved-output)" does not exist))

 else
   BUILD_OUTPUT = $(CURDIR)
 endif

 srctree		:= $(if $(BUILD_SRC),$(BUILD_SRC),$(CURDIR))
 objtree		:= $(BUILD_OUTPUT)
 src		:= $(srctree)
 obj		:= $(objtree)
 bdir		:= $(obj)/lib

 export prefix src obj bdir

 LIBTRACEFS_STATIC = $(bdir)/libtracefs.a
 LIBTRACEFS_SHARED = $(bdir)/libtracefs.so.$(TRACEFS_VERSION)

 LIBTRACEFS_SHARED_SO = $(bdir)/libtracefs.so
 LIBTRACEFS_SHARED_VERSION = $(bdir)/libtracefs.so.$(TFS_VERSION)

 PKG_CONFIG_SOURCE_FILE = libtracefs.pc
 PKG_CONFIG_FILE := $(addprefix $(obj)/,$(PKG_CONFIG_SOURCE_FILE))

 LIBS = $(LIBTRACEEVENT_LIBS) -lpthread

 export LIBS
 export LIBTRACEFS_STATIC LIBTRACEFS_SHARED
 export LIBTRACEEVENT_LIBS LIBTRACEEVENT_INCLUDES
 export LIBTRACEFS_SHARED_SO LIBTRACEFS_SHARED_VERSION

 export Q SILENT VERBOSE EXT

 # Include the utils
 include scripts/utils.mk

 INCLUDES = -I$(src)/include
 INCLUDES += -I$(src)/include/tracefs

 include $(src)/scripts/features.mk

 # Set compile option CFLAGS if not set elsewhere
 CFLAGS ?= -g -Wall
 CPPFLAGS ?=
 LDFLAGS ?=

 CUNIT_INSTALLED := $(shell if (printf "$(pound)include <CUnit/Basic.h>\n void main(){CU_initialize_registry();}" | $(CC) -x c - -lcunit -o /dev/null >/dev/null 2>&1) ; then echo 1; else echo 0 ; fi)
 export CUNIT_INSTALLED

 export CFLAGS
 export INCLUDES

 # Append required CFLAGS
 override CFLAGS += -D_GNU_SOURCE $(LIBTRACEEVENT_INCLUDES) $(INCLUDES)

 all: all_cmd

 LIB_TARGET  = libtracefs.a libtracefs.so.$(TRACEFS_VERSION)
 LIB_INSTALL = libtracefs.a libtracefs.so*
 LIB_INSTALL := $(addprefix $(bdir)/,$(LIB_INSTALL))

 TARGETS = libtracefs.so libtracefs.a

 all_cmd: $(TARGETS) $(PKG_CONFIG_FILE)

 libtracefs.a: $(bdir) $(LIBTRACEFS_STATIC)
 libtracefs.so: $(bdir) $(LIBTRACEFS_SHARED)

 libs: libtracefs.a libtracefs.so

 VALGRIND = $(shell which valgrind)
 UTEST_DIR = utest
 UTEST_BINARY = trace-utest

 test: force $(LIBTRACEFS_STATIC)
 ifneq ($(CUNIT_INSTALLED),1)
 	$(error CUnit framework not installed, cannot build unit tests))
 endif
 	$(Q)$(call descend,$(src)/$(UTEST_DIR),$@)

 test_mem: test
 ifeq (, $(VALGRIND))
 	$(error "No valgrind in $(PATH), cannot run memory test")
 endif
 ifneq ($(shell id -u), 0)
 	$(error "The unit test should be run as root, as it reuqires full access to tracefs")
 endif
 	CK_FORK=no LD_LIBRARY_PATH=$(bdir) $(VALGRIND) \
 		--show-leak-kinds=all --leak-resolution=high \
 		--leak-check=full --show-possibly-lost=yes \
 		--track-origins=yes -s \
 		$(src)/$(UTEST_DIR)/$(UTEST_BINARY)

 define find_tag_files
 	find $(src) -name '\.pc' -prune -o -name '*\.[ch]' -print -o -name '*\.[ch]pp' \
 		! -name '\.#' -print
 endef

 define do_make_pkgconfig_file
 	cp -f ${PKG_CONFIG_SOURCE_FILE}.template ${PKG_CONFIG_FILE};	\
 	sed -i "s|INSTALL_PREFIX|${1}|g" ${PKG_CONFIG_FILE}; 		\
 	sed -i "s|LIB_VERSION|${TRACEFS_VERSION}|g" ${PKG_CONFIG_FILE}; \
 	sed -i "s|LIB_DIR|${libdir_relative}|g" ${PKG_CONFIG_FILE}; \
 	sed -i "s|HEADER_DIR|$(includedir_relative)|g" ${PKG_CONFIG_FILE}; \
 	sed -i "s|LIBTRACEEVENT_MIN|$(LIBTRACEEVENT_MIN_VERSION)|g" ${PKG_CONFIG_FILE};
 endef

 BUILD_PREFIX := $(BUILD_OUTPUT)/build_prefix

 VERSION_FILE = tfs_version.h

 $(BUILD_PREFIX): force
 	$(Q)$(call build_prefix,$(prefix))

 $(PKG_CONFIG_FILE) : ${PKG_CONFIG_SOURCE_FILE}.template $(BUILD_PREFIX) $(VERSION_FILE)
 	$(Q) $(call do_make_pkgconfig_file,$(prefix))

 VIM_TAGS = $(obj)/tags
 EMACS_TAGS = $(obj)/TAGS
 CSCOPE_TAGS = $(obj)/cscope

 $(VIM_TAGS): force
 	$(RM) $@
 	$(call find_tag_files) | (cd $(obj) && xargs ctags --extra=+f --c-kinds=+px)

 $(EMACS_TAGS): force
 	$(RM) $@
 	$(call find_tag_files) | (cd $(obj) && xargs etags)

 $(CSCOPE_TAGS): force
 	$(RM) $(obj)/cscope*
 	$(call find_tag_files) | cscope -b -q

 tags: $(VIM_TAGS)
 TAGS: $(EMACS_TAGS)
 cscope: $(CSCOPE_TAGS)

 ifeq ("$(DESTDIR)", "")
 # If DESTDIR is not defined, then test if after installing the library
 # and running ldconfig, if the library is visible by ld.so.
 # If not, add the path to /etc/ld.so.conf.d/trace.conf and run ldconfig again.
 define install_ld_config
 	if $(LDCONFIG); then \
 		if ! grep -q "^$(libdir)$$" $(LD_SO_CONF_PATH)/* ; then \
 			$(CC) -o $(objtree)/test $(srctree)/test.c -I $(includedir_SQ) \
 				-L $(libdir_SQ) -ltracefs &> /dev/null; \
 			if ! $(objtree)/test &> /dev/null; then \
 				$(call print_install, trace.conf, $(LD_SO_CONF_PATH)) \
 				echo $(libdir_SQ) >> $(LD_SO_CONF_PATH)/trace.conf; \
 				$(LDCONFIG); \
 			fi; \
 			$(RM) $(objtree)/test; \
 		fi; \
 	fi
 endef
 else
 # If installing to a location for another machine or package, do not bother
 # with running ldconfig.
 define install_ld_config
 endef
 endif # DESTDIR = ""

 install_libs: libs install_pkgconfig
 	$(Q)$(call do_install,$(LIBTRACEFS_SHARED),$(libdir_SQ)); \
 		cp -fpR $(LIB_INSTALL) $(DESTDIR)$(libdir_SQ)
 	$(Q)$(call do_install,$(src)/include/tracefs.h,$(includedir_SQ),644)
 	$(Q)$(call install_ld_config)

 install: install_libs

 install_pkgconfig: $(PKG_CONFIG_FILE)
 	$(Q)$(call , $(PKG_CONFIG_FILE)) \
 		$(call do_install_pkgconfig_file,$(prefix))

 doc:
 	$(Q)$(call descend,$(src)/Documentation,all)

 doc_clean:
 	$(Q)$(call descend,$(src)/Documentation,clean)

 install_doc:
 	$(Q)$(call descend,$(src)/Documentation,install)

 define build_uninstall_script
 	$(Q)mkdir $(BUILD_OUTPUT)/tmp_build
 	$(Q)$(MAKE) -C $(src) DESTDIR=$(BUILD_OUTPUT)/tmp_build/ O=$(BUILD_OUTPUT) $1 > /dev/null
 	$(Q)find $(BUILD_OUTPUT)/tmp_build ! -type d -printf "%P\n" > $(BUILD_OUTPUT)/build_$2
 	$(Q)$(RM) -rf $(BUILD_OUTPUT)/tmp_build
 endef

 build_uninstall: $(BUILD_PREFIX)
 	$(call build_uninstall_script,install,uninstall)

 $(BUILD_OUTPUT)/build_uninstall: build_uninstall

 define uninstall_file
 	if [ -f $(DESTDIR)/$1 -o -h $(DESTDIR)/$1 ]; then \
 		$(call print_uninstall,$(DESTDIR)/$1)$(RM) $(DESTDIR)/$1; \
 	fi;
 endef

 uninstall: $(BUILD_OUTPUT)/build_uninstall
 	@$(foreach file,$(shell cat $(BUILD_OUTPUT)/build_uninstall),$(call uninstall_file,$(file)))

 PHONY += force
 force:

 # Declare the contents of the .PHONY variable as phony.  We keep that
 # information in a variable so we can use it in if_changed and friends.
 .PHONY: $(PHONY)

 DEFAULT_TARGET = $(LIBTRACEFS_STATIC)

 OBJS =
 OBJS += tracefs-utils.o
 OBJS += tracefs-instance.o
 OBJS += tracefs-events.o

 OBJS := $(OBJS:%.o=$(bdir)/%.o)
 DEPS := $(OBJS:$(bdir)/%.o=$(bdir)/.%.d)

 all: $(DEFAULT_TARGET)

 $(bdir):
 	@mkdir -p $(bdir)

 VERSION = $(TFS_VERSION)
 PATCHLEVEL = $(TFS_PATCHLEVEL)
 EXTRAVERSION = $(TFS_EXTRAVERSION)

 define make_version.h
   (echo '/* This file is automatically generated. Do not modify. */';		\
    echo \#define VERSION_CODE $(shell						\
    expr $(VERSION) \* 256 + $(PATCHLEVEL));					\
    echo '#define EXTRAVERSION ' $(EXTRAVERSION);				\
    echo '#define VERSION_STRING "'$(VERSION).$(PATCHLEVEL).$(EXTRAVERSION)'"';	\
   ) > $1
 endef

 define update_version.h
   ($(call make_version.h, $@.tmp);		\
     if [ -r $@ ] && cmp -s $@ $@.tmp; then	\
       rm -f $@.tmp;				\
     else					\
       echo '  UPDATE             $@';		\
       mv -f $@.tmp $@;				\
     fi);
 endef

 $(VERSION_FILE): force
 	$(Q)$(call update_version.h)

 $(LIBTRACEFS_STATIC): force
 	$(Q)$(call descend,$(src)/src,$@)

 $(bdir)/libtracefs.so.$(TRACEFS_VERSION): force
 	$(Q)$(call descend,$(src)/src,libtracefs.so)

 samples/sqlhist: libtracefs.a
 	$(Q)$(call descend,$(src)/samples,sqlhist)

 sqlhist: samples/sqlhist

 samples: libtracefs.a force
 	$(Q)$(call descend,$(src)/samples,all)

 clean:
 	$(Q)$(call descend_clean,utest)
 	$(Q)$(call descend_clean,src)
 	$(Q)$(call descend_clean,samples)
 	$(Q)$(call do_clean, \
 	  $(TARGETS) $(bdir)/*.a $(bdir)/*.so $(bdir)/*.so.* $(bdir)/*.o $(bdir)/.*.d \
 	  $(PKG_CONFIG_FILE) \
 	  $(VERSION_FILE) \
 	  $(BUILD_PREFIX))

 .PHONY: clean
	# SPDX-License-Identifier: LGPL-2.1
	# libtracefs version
	TFS_VERSION = 1
	TFS_PATCHLEVEL = 3
	TFS_EXTRAVERSION = dev
	TRACEFS_VERSION = $(TFS_VERSION).$(TFS_PATCHLEVEL).$(TFS_EXTRAVERSION)

	export TFS_VERSION
	export TFS_PATCHLEVEL
	export TFS_EXTRAVERSION
	export TRACEFS_VERSION

	LIBTRACEEVENT_MIN_VERSION = 1.3

	# taken from trace-cmd
	MAKEFLAGS += --no-print-directory

	# Makefiles suck: This macro sets a default value of $(2) for the
	# variable named by $(1), unless the variable has been set by
	# environment or command line. This is necessary for CC and AR
	# because make sets default values, so the simpler ?= approach
	# won't work as expected.
	define allow-override
	$(if $(or $(findstring environment,$(origin $(1))),\
	$(findstring command line,$(origin $(1)))),,\
	$(eval $(1) = $(2)))
	endef

	# Allow setting CC and AR, or setting CROSS_COMPILE as a prefix.
	$(call allow-override,CC,$(CROSS_COMPILE)gcc)
	$(call allow-override,AR,$(CROSS_COMPILE)ar)
	$(call allow-override,PKG_CONFIG,pkg-config)
	$(call allow-override,LD_SO_CONF_PATH,/etc/ld.so.conf.d/)
	$(call allow-override,LDCONFIG,ldconfig)

	EXT = -std=gnu99
	INSTALL = install

	# Use DESTDIR for installing into a different root directory.
	# This is useful for building a package. The program will be
	# installed in this directory as if it was the root directory.
	# Then the build tool can move it later.
	DESTDIR ?=
	DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))'

	LP64 := $(shell echo __LP64__ \| ${CC} ${CFLAGS} -E -x c - \| tail -n 1)
	ifeq ($(LP64), 1)
	libdir_relative_temp = lib64
	else
	libdir_relative_temp = lib
	endif

	libdir_relative ?= $(libdir_relative_temp)
	prefix ?= /usr/local
	man_dir = $(prefix)/share/man
	man_dir_SQ = '$(subst ','\'',$(man_dir))'
	libdir = $(prefix)/$(libdir_relative)
	libdir_SQ = '$(subst ','\'',$(libdir))'
	includedir_relative ?= include/tracefs
	includedir = $(prefix)/$(includedir_relative)
	includedir_SQ = '$(subst ','\'',$(includedir))'
	pkgconfig_dir ?= $(word 1,$(shell $(PKG_CONFIG) \
	--variable pc_path pkg-config \| tr ":" " "))

	TEST_LIBTRACEEVENT = $(shell sh -c "$(PKG_CONFIG) --atleast-version $(LIBTRACEEVENT_MIN_VERSION) libtraceevent > /dev/null 2>&1 && echo y")

	ifeq ("$(TEST_LIBTRACEEVENT)", "y")
	LIBTRACEEVENT_INCLUDES = $(shell sh -c "$(PKG_CONFIG) --cflags libtraceevent")
	LIBTRACEEVENT_LIBS = $(shell sh -c "$(PKG_CONFIG) --libs libtraceevent")
	else
	ifneq ($(MAKECMDGOALS),clean)
	$(error libtraceevent.so minimum version of $(LIBTRACEEVENT_MIN_VERSION) not installed)
	endif
	endif

	etcdir ?= /etc
	etcdir_SQ = '$(subst ','\'',$(etcdir))'

	export man_dir man_dir_SQ html_install html_install_SQ INSTALL
	export img_install img_install_SQ
	export DESTDIR DESTDIR_SQ

	pound := \#

	HELP_DIR = -DHELP_DIR=$(html_install)
	HELP_DIR_SQ = '$(subst ','\'',$(HELP_DIR))'
	#' emacs highlighting gets confused by the above escaped quote.

	BASH_COMPLETE_DIR ?= $(etcdir)/bash_completion.d

	# copy a bit from Linux kbuild

	ifeq ("$(origin V)", "command line")
	VERBOSE = $(V)
	endif
	ifndef VERBOSE
	VERBOSE = 0
	endif

	SILENT := $(if $(findstring s,$(filter-out --%,$(MAKEFLAGS))),1)

	# $(call test-build, snippet, ret) -> ret if snippet compiles
	# -> empty otherwise
	test-build = $(if $(shell sh -c 'echo "$(1)" \| \
	$(CC) -o /dev/null -c -x c - > /dev/null 2>&1 && echo y'), $2)

	ifeq ("$(origin O)", "command line")

	saved-output := $(O)
	BUILD_OUTPUT := $(shell cd $(O) && /bin/pwd)
	$(if $(BUILD_OUTPUT),, \
	$(error output directory "$(saved-output)" does not exist))

	else
	BUILD_OUTPUT = $(CURDIR)
	endif

	srctree := $(if $(BUILD_SRC),$(BUILD_SRC),$(CURDIR))
	objtree := $(BUILD_OUTPUT)
	src := $(srctree)
	obj := $(objtree)
	bdir := $(obj)/lib

	export prefix src obj bdir

	LIBTRACEFS_STATIC = $(bdir)/libtracefs.a
	LIBTRACEFS_SHARED = $(bdir)/libtracefs.so.$(TRACEFS_VERSION)

	LIBTRACEFS_SHARED_SO = $(bdir)/libtracefs.so
	LIBTRACEFS_SHARED_VERSION = $(bdir)/libtracefs.so.$(TFS_VERSION)

	PKG_CONFIG_SOURCE_FILE = libtracefs.pc
	PKG_CONFIG_FILE := $(addprefix $(obj)/,$(PKG_CONFIG_SOURCE_FILE))

	LIBS = $(LIBTRACEEVENT_LIBS) -lpthread

	export LIBS
	export LIBTRACEFS_STATIC LIBTRACEFS_SHARED
	export LIBTRACEEVENT_LIBS LIBTRACEEVENT_INCLUDES
	export LIBTRACEFS_SHARED_SO LIBTRACEFS_SHARED_VERSION

	export Q SILENT VERBOSE EXT

	# Include the utils
	include scripts/utils.mk

	INCLUDES = -I$(src)/include
	INCLUDES += -I$(src)/include/tracefs

	include $(src)/scripts/features.mk

	# Set compile option CFLAGS if not set elsewhere
	CFLAGS ?= -g -Wall
	CPPFLAGS ?=
	LDFLAGS ?=

	CUNIT_INSTALLED := $(shell if (printf "$(pound)include <CUnit/Basic.h>\n void main(){CU_initialize_registry();}" \| $(CC) -x c - -lcunit -o /dev/null >/dev/null 2>&1) ; then echo 1; else echo 0 ; fi)
	export CUNIT_INSTALLED

	export CFLAGS
	export INCLUDES

	# Append required CFLAGS
	override CFLAGS += -D_GNU_SOURCE $(LIBTRACEEVENT_INCLUDES) $(INCLUDES)

	all: all_cmd

	LIB_TARGET = libtracefs.a libtracefs.so.$(TRACEFS_VERSION)
	LIB_INSTALL = libtracefs.a libtracefs.so*
	LIB_INSTALL := $(addprefix $(bdir)/,$(LIB_INSTALL))

	TARGETS = libtracefs.so libtracefs.a

	all_cmd: $(TARGETS) $(PKG_CONFIG_FILE)

	libtracefs.a: $(bdir) $(LIBTRACEFS_STATIC)
	libtracefs.so: $(bdir) $(LIBTRACEFS_SHARED)

	libs: libtracefs.a libtracefs.so

	VALGRIND = $(shell which valgrind)
	UTEST_DIR = utest
	UTEST_BINARY = trace-utest

	test: force $(LIBTRACEFS_STATIC)
	ifneq ($(CUNIT_INSTALLED),1)
	$(error CUnit framework not installed, cannot build unit tests))
	endif
	$(Q)$(call descend,$(src)/$(UTEST_DIR),$@)

	test_mem: test
	ifeq (, $(VALGRIND))
	$(error "No valgrind in $(PATH), cannot run memory test")
	endif
	ifneq ($(shell id -u), 0)
	$(error "The unit test should be run as root, as it reuqires full access to tracefs")
	endif
	CK_FORK=no LD_LIBRARY_PATH=$(bdir) $(VALGRIND) \
	--show-leak-kinds=all --leak-resolution=high \
	--leak-check=full --show-possibly-lost=yes \
	--track-origins=yes -s \
	$(src)/$(UTEST_DIR)/$(UTEST_BINARY)

	define find_tag_files
	find $(src) -name '\.pc' -prune -o -name '\.[ch]' -print -o -name '\.[ch]pp' \
	! -name '\.#' -print
	endef

	define do_make_pkgconfig_file
	cp -f ${PKG_CONFIG_SOURCE_FILE}.template ${PKG_CONFIG_FILE}; \
	sed -i "s\|INSTALL_PREFIX\|${1}\|g" ${PKG_CONFIG_FILE}; \
	sed -i "s\|LIB_VERSION\|${TRACEFS_VERSION}\|g" ${PKG_CONFIG_FILE}; \
	sed -i "s\|LIB_DIR\|${libdir_relative}\|g" ${PKG_CONFIG_FILE}; \
	sed -i "s\|HEADER_DIR\|$(includedir_relative)\|g" ${PKG_CONFIG_FILE}; \
	sed -i "s\|LIBTRACEEVENT_MIN\|$(LIBTRACEEVENT_MIN_VERSION)\|g" ${PKG_CONFIG_FILE};
	endef

	BUILD_PREFIX := $(BUILD_OUTPUT)/build_prefix

	VERSION_FILE = tfs_version.h

	$(BUILD_PREFIX): force
	$(Q)$(call build_prefix,$(prefix))

	$(PKG_CONFIG_FILE) : ${PKG_CONFIG_SOURCE_FILE}.template $(BUILD_PREFIX) $(VERSION_FILE)
	$(Q) $(call do_make_pkgconfig_file,$(prefix))

	VIM_TAGS = $(obj)/tags
	EMACS_TAGS = $(obj)/TAGS
	CSCOPE_TAGS = $(obj)/cscope

	$(VIM_TAGS): force
	$(RM) $@
	$(call find_tag_files) \| (cd $(obj) && xargs ctags --extra=+f --c-kinds=+px)

	$(EMACS_TAGS): force
	$(RM) $@
	$(call find_tag_files) \| (cd $(obj) && xargs etags)

	$(CSCOPE_TAGS): force
	$(RM) $(obj)/cscope*
	$(call find_tag_files) \| cscope -b -q

	tags: $(VIM_TAGS)
	TAGS: $(EMACS_TAGS)
	cscope: $(CSCOPE_TAGS)

	ifeq ("$(DESTDIR)", "")
	# If DESTDIR is not defined, then test if after installing the library
	# and running ldconfig, if the library is visible by ld.so.
	# If not, add the path to /etc/ld.so.conf.d/trace.conf and run ldconfig again.
	define install_ld_config
	if $(LDCONFIG); then \
	if ! grep -q "^$(libdir)$$" $(LD_SO_CONF_PATH)/* ; then \
	$(CC) -o $(objtree)/test $(srctree)/test.c -I $(includedir_SQ) \
	-L $(libdir_SQ) -ltracefs &> /dev/null; \
	if ! $(objtree)/test &> /dev/null; then \
	$(call print_install, trace.conf, $(LD_SO_CONF_PATH)) \
	echo $(libdir_SQ) >> $(LD_SO_CONF_PATH)/trace.conf; \
	$(LDCONFIG); \
	fi; \
	$(RM) $(objtree)/test; \
	fi; \
	fi
	endef
	else
	# If installing to a location for another machine or package, do not bother
	# with running ldconfig.
	define install_ld_config
	endef
	endif # DESTDIR = ""

	install_libs: libs install_pkgconfig
	$(Q)$(call do_install,$(LIBTRACEFS_SHARED),$(libdir_SQ)); \
	cp -fpR $(LIB_INSTALL) $(DESTDIR)$(libdir_SQ)
	$(Q)$(call do_install,$(src)/include/tracefs.h,$(includedir_SQ),644)
	$(Q)$(call install_ld_config)

	install: install_libs

	install_pkgconfig: $(PKG_CONFIG_FILE)
	$(Q)$(call , $(PKG_CONFIG_FILE)) \
	$(call do_install_pkgconfig_file,$(prefix))

	doc:
	$(Q)$(call descend,$(src)/Documentation,all)

	doc_clean:
	$(Q)$(call descend,$(src)/Documentation,clean)

	install_doc:
	$(Q)$(call descend,$(src)/Documentation,install)

	define build_uninstall_script
	$(Q)mkdir $(BUILD_OUTPUT)/tmp_build
	$(Q)$(MAKE) -C $(src) DESTDIR=$(BUILD_OUTPUT)/tmp_build/ O=$(BUILD_OUTPUT) $1 > /dev/null
	$(Q)find $(BUILD_OUTPUT)/tmp_build ! -type d -printf "%P\n" > $(BUILD_OUTPUT)/build_$2
	$(Q)$(RM) -rf $(BUILD_OUTPUT)/tmp_build
	endef

	build_uninstall: $(BUILD_PREFIX)
	$(call build_uninstall_script,install,uninstall)

	$(BUILD_OUTPUT)/build_uninstall: build_uninstall

	define uninstall_file
	if [ -f $(DESTDIR)/$1 -o -h $(DESTDIR)/$1 ]; then \
	$(call print_uninstall,$(DESTDIR)/$1)$(RM) $(DESTDIR)/$1; \
	fi;
	endef

	uninstall: $(BUILD_OUTPUT)/build_uninstall
	@$(foreach file,$(shell cat $(BUILD_OUTPUT)/build_uninstall),$(call uninstall_file,$(file)))

	PHONY += force
	force:

	# Declare the contents of the .PHONY variable as phony. We keep that
	# information in a variable so we can use it in if_changed and friends.
	.PHONY: $(PHONY)

	DEFAULT_TARGET = $(LIBTRACEFS_STATIC)

	OBJS =
	OBJS += tracefs-utils.o
	OBJS += tracefs-instance.o
	OBJS += tracefs-events.o

	OBJS := $(OBJS:%.o=$(bdir)/%.o)
	DEPS := $(OBJS:$(bdir)/%.o=$(bdir)/.%.d)

	all: $(DEFAULT_TARGET)

	$(bdir):
	@mkdir -p $(bdir)

	VERSION = $(TFS_VERSION)
	PATCHLEVEL = $(TFS_PATCHLEVEL)
	EXTRAVERSION = $(TFS_EXTRAVERSION)

	define make_version.h
	(echo '/* This file is automatically generated. Do not modify. */'; \
	echo \#define VERSION_CODE $(shell \
	expr $(VERSION) \* 256 + $(PATCHLEVEL)); \
	echo '#define EXTRAVERSION ' $(EXTRAVERSION); \
	echo '#define VERSION_STRING "'$(VERSION).$(PATCHLEVEL).$(EXTRAVERSION)'"'; \
	) > $1
	endef

	define update_version.h
	($(call make_version.h, $@.tmp); \
	if [ -r $@ ] && cmp -s $@ $@.tmp; then \
	rm -f $@.tmp; \
	else \
	echo ' UPDATE $@'; \
	mv -f $@.tmp $@; \
	fi);
	endef

	$(VERSION_FILE): force
	$(Q)$(call update_version.h)

	$(LIBTRACEFS_STATIC): force
	$(Q)$(call descend,$(src)/src,$@)

	$(bdir)/libtracefs.so.$(TRACEFS_VERSION): force
	$(Q)$(call descend,$(src)/src,libtracefs.so)

	samples/sqlhist: libtracefs.a
	$(Q)$(call descend,$(src)/samples,sqlhist)

	sqlhist: samples/sqlhist

	samples: libtracefs.a force
	$(Q)$(call descend,$(src)/samples,all)

	clean:
	$(Q)$(call descend_clean,utest)
	$(Q)$(call descend_clean,src)
	$(Q)$(call descend_clean,samples)
	$(Q)$(call do_clean, \
	$(TARGETS) $(bdir)/.a $(bdir)/.so $(bdir)/.so. $(bdir)/.o $(bdir)/..d \
	$(PKG_CONFIG_FILE) \
	$(VERSION_FILE) \
	$(BUILD_PREFIX))

	.PHONY: clean