linux-imx/tools/lib/traceevent/plugins/Makefile

SPDX-License-Identifier: GPL-2.0

#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) $(call allow-override,NM,$(CROSS_COMPILE)nm) $(call allow-override,PKG_CONFIG,pkg-config)

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_tmp = lib64 else libdir_relative_tmp = lib endif

libdir_relative ?= $(libdir_relative_tmp) prefix ?= /usr/local libdir = $(prefix)/$(libdir_relative)

set_plugin_dir := 1

Set plugin_dir to preffered global plugin location

If we install under $HOME directory we go under

$(HOME)/.local/lib/traceevent/plugins

We dont set PLUGIN_DIR in case we install under $HOME

directory, because by default the code looks under:

$(HOME)/.local/lib/traceevent/plugins by default.

ifeq ($(plugin_dir),) ifeq ($(prefix),$(HOME)) override plugin_dir = $(HOME)/.local/lib/traceevent/plugins set_plugin_dir := 0 else override plugin_dir = $(libdir)/traceevent/plugins endif endif

ifeq ($(set_plugin_dir),1) PLUGIN_DIR = -DPLUGIN_DIR="$(plugin_dir)" PLUGIN_DIR_SQ = '$(subst ',''',$(PLUGIN_DIR))' endif

include ../../../scripts/Makefile.include

copy a bit from Linux kbuild

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

ifeq ($(srctree),) srctree := $(patsubst %/,%,$(dir $(CURDIR))) srctree := $(patsubst %/,%,$(dir $(srctree))) srctree := $(patsubst %/,%,$(dir $(srctree))) srctree := $(patsubst %/,%,$(dir $(srctree))) #$(info Determined 'srctree' to be $(srctree)) endif

export prefix libdir src obj

Shell quotes

plugin_dir_SQ = $(subst ',''',$(plugin_dir))

CONFIG_INCLUDES = CONFIG_LIBS = CONFIG_FLAGS =

OBJ = $@ N =

INCLUDES = -I. -I.. -I $(srctree)/tools/include $(CONFIG_INCLUDES)

Set compile option CFLAGS

ifdef EXTRA_CFLAGS CFLAGS := $(EXTRA_CFLAGS) else CFLAGS := -g -Wall endif

Append required CFLAGS

override CFLAGS += -fPIC override CFLAGS += $(CONFIG_FLAGS) $(INCLUDES) $(PLUGIN_DIR_SQ) override CFLAGS += $(udis86-flags) -D_GNU_SOURCE

ifeq ($(VERBOSE),1) Q = else Q = @ endif

Disable command line variables (CFLAGS) override from top

level Makefile (perf), otherwise build Makefile will get

the same command line setup.

MAKEOVERRIDES=

export srctree OUTPUT CC LD CFLAGS V

build := -f $(srctree)/tools/build/Makefile.build dir=. obj

DYNAMIC_LIST_FILE := $(OUTPUT)libtraceevent-dynamic-list

PLUGINS = plugin_jbd2.so PLUGINS += plugin_hrtimer.so PLUGINS += plugin_kmem.so PLUGINS += plugin_kvm.so PLUGINS += plugin_mac80211.so PLUGINS += plugin_sched_switch.so PLUGINS += plugin_function.so PLUGINS += plugin_futex.so PLUGINS += plugin_xen.so PLUGINS += plugin_scsi.so PLUGINS += plugin_cfg80211.so PLUGINS += plugin_tlb.so

PLUGINS := $(addprefix $(OUTPUT),$(PLUGINS)) PLUGINS_IN := $(PLUGINS:.so=-in.o)

plugins: $(PLUGINS) $(DYNAMIC_LIST_FILE)

__plugin_obj = $(notdir $@) plugin_obj = $(__plugin_obj:-in.o=)

$(PLUGINS_IN): force $(Q)$(MAKE) $(build)=$(plugin_obj)

$(OUTPUT)libtraceevent-dynamic-list: $(PLUGINS) $(QUIET_GEN)$(call do_generate_dynamic_list_file, $(PLUGINS), $@)

$(OUTPUT)%.so: $(OUTPUT)%-in.o $(QUIET_LINK)$(CC) $(CFLAGS) -shared $(LDFLAGS) -nostartfiles -o $@ $^

define update_dir (echo $1 > $@.tmp;
if [ -r $@ ] && cmp -s $@ $@.tmp; then
rm -f $@.tmp;
else
echo ' UPDATE $@';
mv -f $@.tmp $@;
fi); endef

tags: force $(RM) tags find . -name '.[ch]' | xargs ctags --extra=+f --c-kinds=+px
--regex-c++='/_PE(([^,)]).*/TEP_ERRNO__\1/'

TAGS: force $(RM) TAGS find . -name '.[ch]' | xargs etags
--regex='/_PE([^,)]*./TEP_ERRNO__\1/'

define do_install_mkdir if [ ! -d '$(DESTDIR_SQ)$1' ]; then
$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$1';
fi endef

define do_install $(call do_install_mkdir,$2);
$(INSTALL) $(if $3,-m $3,) $1 '$(DESTDIR_SQ)$2' endef

define do_install_plugins for plugin in $1; do
$(call do_install,$$plugin,$(plugin_dir_SQ));
done endef

define do_generate_dynamic_list_file symbol_type=$(NM) -u -D $1 | awk 'NF>1 {print $$1}' | \ xargs echo "U w W" | tr 'w ' 'W\n' | sort -u | xargs echo;
if [ "$$symbol_type" = "U W" ];then
(echo '{';
$(NM) -u -D $1 | awk 'NF>1 {sub("@.*", "", $$2); print "\t"$$2";"}' | sort -u;
echo '};';
) > $2;
else
(echo Either missing one of [$1] or bad version of $(NM)) 1>&2;
fi endef

install: $(PLUGINS) $(call QUIET_INSTALL, trace_plugins)
$(call do_install_plugins, $(PLUGINS))

clean: $(call QUIET_CLEAN, trace_plugins)
$(RM) *.o *~ $(TARGETS) .a .so $(VERSION_FILES) ..d ..cmd;
$(RM) $(OUTPUT)libtraceevent-dynamic-list
$(RM) TRACEEVENT-CFLAGS tags TAGS;

PHONY += force plugins 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)