Makefile - pub/scm/linux/kernel/git/rostedt/ktrace - Git at Google

 # SPDX-License-Identifier: LGPL-2.1
 # ktrace version:
 KT_VERSION = 0
 KT_PATCHLEVEL = 0
 KT_EXTRAVERSION = dev
 KTRACE_VERSION = $(KT_VERSION).$(KT_PATCHLEVEL).$(KT_EXTRAVERSION)

 export KT_VERSION
 export KT_PATCHLEVEL
 export KT_EXTRAVERSION
 export KTRACE_VERSION

 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
 includedir = $(prefix)/$(includedir_relative)
 includedir_SQ = '$(subst ','\'',$(includedir))'
 pkgconfig_dir ?= $(word 1,$(shell $(PKG_CONFIG) 		\
 			--variable pc_path pkg-config | tr ":" " "))


 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)

 LIBTRACEFS_MIN_VERSION = 1.2
 LIBCCLI_MIN_VERSION = 1.1

 # Test for necessary libraries
 TEST_LIBTRACEFS = $(shell sh -c "$(PKG_CONFIG) --atleast-version $(LIBTRACEFS_MIN_VERSION) libtracefs > /dev/null 2>&1 && echo y")

 ifeq ("$(TEST_LIBTRACEFS)", "y")
 LIBTRACEFS_INCLUDES = $(shell sh -c "$(PKG_CONFIG) --cflags libtracefs")
 LIBTRACEFS_LIBS = $(shell sh -c "$(PKG_CONFIG) --libs libtracefs")
 else
  ifneq ($(MAKECMDGOALS),clean)
    $(error libtracefs.so minimum version of $(LIBTRACEFS_MIN_VERSION) not installed)
  endif
 endif

 # Test for necessary libraries
 TEST_LIBCCLI = $(shell sh -c "$(PKG_CONFIG) --atleast-version $(LIBCCLI_MIN_VERSION) libccli > /dev/null 2>&1 && echo y")

 ifeq ("$(TEST_LIBCCLI)", "y")
 LIBCCLI_INCLUDES = $(shell sh -c "$(PKG_CONFIG) --cflags libccli")
 LIBCCLI_LIBS = $(shell sh -c "$(PKG_CONFIG) --libs libccli")
 else
  ifneq ($(MAKECMDGOALS),clean)
    $(error libccli.so minimum version of $(LIBCCLI_MIN_VERSION) not installed)
  endif
 endif

 # $(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)/src

 export prefix src obj bdir

 LIBS =$(LIBCCLI_LIBS) $(LIBTRACEFS_LIBS)

 export LIBS

 export Q SILENT VERBOSE EXT

 # Include the utils
 include scripts/utils.mk

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

 INCLUDES += -I$(src)/include

 CFLAGS += $(LIBCCLI_INCLUDES) $(LIBTRACEFS_INCLUDES)

 export CFLAGS
 export INCLUDES

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

 all: all_cmd

 TARGETS = ktrace

 all_cmd: $(TARGETS)

 ktrace: force
 	make -C src $@

 VERSION_FILE = ktest_version.h

 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)

 install:

 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)

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

 all: $(DEFAULT_TARGET)

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

 VERSION = $(KT_VERSION)
 PATCHLEVEL = $(KT_PATCHLEVEL)
 EXTRAVERSION = $(KT_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)

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

 .PHONY: clean
	# SPDX-License-Identifier: LGPL-2.1
	# ktrace version:
	KT_VERSION = 0
	KT_PATCHLEVEL = 0
	KT_EXTRAVERSION = dev
	KTRACE_VERSION = $(KT_VERSION).$(KT_PATCHLEVEL).$(KT_EXTRAVERSION)

	export KT_VERSION
	export KT_PATCHLEVEL
	export KT_EXTRAVERSION
	export KTRACE_VERSION

	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
	includedir = $(prefix)/$(includedir_relative)
	includedir_SQ = '$(subst ','\'',$(includedir))'
	pkgconfig_dir ?= $(word 1,$(shell $(PKG_CONFIG) \
	--variable pc_path pkg-config \| tr ":" " "))


	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)

	LIBTRACEFS_MIN_VERSION = 1.2
	LIBCCLI_MIN_VERSION = 1.1

	# Test for necessary libraries
	TEST_LIBTRACEFS = $(shell sh -c "$(PKG_CONFIG) --atleast-version $(LIBTRACEFS_MIN_VERSION) libtracefs > /dev/null 2>&1 && echo y")

	ifeq ("$(TEST_LIBTRACEFS)", "y")
	LIBTRACEFS_INCLUDES = $(shell sh -c "$(PKG_CONFIG) --cflags libtracefs")
	LIBTRACEFS_LIBS = $(shell sh -c "$(PKG_CONFIG) --libs libtracefs")
	else
	ifneq ($(MAKECMDGOALS),clean)
	$(error libtracefs.so minimum version of $(LIBTRACEFS_MIN_VERSION) not installed)
	endif
	endif

	# Test for necessary libraries
	TEST_LIBCCLI = $(shell sh -c "$(PKG_CONFIG) --atleast-version $(LIBCCLI_MIN_VERSION) libccli > /dev/null 2>&1 && echo y")

	ifeq ("$(TEST_LIBCCLI)", "y")
	LIBCCLI_INCLUDES = $(shell sh -c "$(PKG_CONFIG) --cflags libccli")
	LIBCCLI_LIBS = $(shell sh -c "$(PKG_CONFIG) --libs libccli")
	else
	ifneq ($(MAKECMDGOALS),clean)
	$(error libccli.so minimum version of $(LIBCCLI_MIN_VERSION) not installed)
	endif
	endif

	# $(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)/src

	export prefix src obj bdir

	LIBS =$(LIBCCLI_LIBS) $(LIBTRACEFS_LIBS)

	export LIBS

	export Q SILENT VERBOSE EXT

	# Include the utils
	include scripts/utils.mk

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

	INCLUDES += -I$(src)/include

	CFLAGS += $(LIBCCLI_INCLUDES) $(LIBTRACEFS_INCLUDES)

	export CFLAGS
	export INCLUDES

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

	all: all_cmd

	TARGETS = ktrace

	all_cmd: $(TARGETS)

	ktrace: force
	make -C src $@

	VERSION_FILE = ktest_version.h

	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)

	install:

	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)

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

	all: $(DEFAULT_TARGET)

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

	VERSION = $(KT_VERSION)
	PATCHLEVEL = $(KT_PATCHLEVEL)
	EXTRAVERSION = $(KT_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)

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

	.PHONY: clean