1# SPDX-License-Identifier: GPL-2.0 2 3#MAKEFLAGS += --no-print-directory 4 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,$(CROSS_COMPILE)ar) 20$(call allow-override,NM,$(CROSS_COMPILE)nm) 21$(call allow-override,PKG_CONFIG,pkg-config) 22 23EXT = -std=gnu99 24INSTALL = install 25 26# Use DESTDIR for installing into a different root directory. 27# This is useful for building a package. The program will be 28# installed in this directory as if it was the root directory. 29# Then the build tool can move it later. 30DESTDIR ?= 31DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))' 32 33LP64 := $(shell echo __LP64__ | ${CC} ${CFLAGS} -E -x c - | tail -n 1) 34ifeq ($(LP64), 1) 35 libdir_relative = lib64 36else 37 libdir_relative = lib 38endif 39 40prefix ?= /usr/local 41libdir = $(prefix)/$(libdir_relative) 42 43set_plugin_dir := 1 44 45# Set plugin_dir to preffered global plugin location 46# If we install under $HOME directory we go under 47# $(HOME)/.local/lib/traceevent/plugins 48# 49# We dont set PLUGIN_DIR in case we install under $HOME 50# directory, because by default the code looks under: 51# $(HOME)/.local/lib/traceevent/plugins by default. 52# 53ifeq ($(plugin_dir),) 54ifeq ($(prefix),$(HOME)) 55override plugin_dir = $(HOME)/.local/lib/traceevent/plugins 56set_plugin_dir := 0 57else 58override plugin_dir = $(libdir)/traceevent/plugins 59endif 60endif 61 62ifeq ($(set_plugin_dir),1) 63PLUGIN_DIR = -DPLUGIN_DIR="$(plugin_dir)" 64PLUGIN_DIR_SQ = '$(subst ','\'',$(PLUGIN_DIR))' 65endif 66 67include ../../../scripts/Makefile.include 68 69# copy a bit from Linux kbuild 70 71ifeq ("$(origin V)", "command line") 72 VERBOSE = $(V) 73endif 74ifndef VERBOSE 75 VERBOSE = 0 76endif 77 78ifeq ($(srctree),) 79srctree := $(patsubst %/,%,$(dir $(CURDIR))) 80srctree := $(patsubst %/,%,$(dir $(srctree))) 81srctree := $(patsubst %/,%,$(dir $(srctree))) 82srctree := $(patsubst %/,%,$(dir $(srctree))) 83#$(info Determined 'srctree' to be $(srctree)) 84endif 85 86export prefix libdir src obj 87 88# Shell quotes 89plugin_dir_SQ = $(subst ','\'',$(plugin_dir)) 90 91CONFIG_INCLUDES = 92CONFIG_LIBS = 93CONFIG_FLAGS = 94 95OBJ = $@ 96N = 97 98INCLUDES = -I. -I.. -I $(srctree)/tools/include $(CONFIG_INCLUDES) 99 100# Set compile option CFLAGS 101ifdef EXTRA_CFLAGS 102 CFLAGS := $(EXTRA_CFLAGS) 103else 104 CFLAGS := -g -Wall 105endif 106 107# Append required CFLAGS 108override CFLAGS += -fPIC 109override CFLAGS += $(CONFIG_FLAGS) $(INCLUDES) $(PLUGIN_DIR_SQ) 110override CFLAGS += $(udis86-flags) -D_GNU_SOURCE 111 112ifeq ($(VERBOSE),1) 113 Q = 114else 115 Q = @ 116endif 117 118# Disable command line variables (CFLAGS) override from top 119# level Makefile (perf), otherwise build Makefile will get 120# the same command line setup. 121MAKEOVERRIDES= 122 123export srctree OUTPUT CC LD CFLAGS V 124 125build := -f $(srctree)/tools/build/Makefile.build dir=. obj 126 127DYNAMIC_LIST_FILE := $(OUTPUT)libtraceevent-dynamic-list 128 129PLUGINS = plugin_jbd2.so 130PLUGINS += plugin_hrtimer.so 131PLUGINS += plugin_kmem.so 132PLUGINS += plugin_kvm.so 133PLUGINS += plugin_mac80211.so 134PLUGINS += plugin_sched_switch.so 135PLUGINS += plugin_function.so 136PLUGINS += plugin_xen.so 137PLUGINS += plugin_scsi.so 138PLUGINS += plugin_cfg80211.so 139 140PLUGINS := $(addprefix $(OUTPUT),$(PLUGINS)) 141PLUGINS_IN := $(PLUGINS:.so=-in.o) 142 143plugins: $(PLUGINS) $(DYNAMIC_LIST_FILE) 144 145__plugin_obj = $(notdir $@) 146 plugin_obj = $(__plugin_obj:-in.o=) 147 148$(PLUGINS_IN): force 149 $(Q)$(MAKE) $(build)=$(plugin_obj) 150 151$(OUTPUT)libtraceevent-dynamic-list: $(PLUGINS) 152 $(QUIET_GEN)$(call do_generate_dynamic_list_file, $(PLUGINS), $@) 153 154$(OUTPUT)%.so: $(OUTPUT)%-in.o 155 $(QUIET_LINK)$(CC) $(CFLAGS) -shared $(LDFLAGS) -nostartfiles -o $@ $^ 156 157define update_dir 158 (echo $1 > $@.tmp; \ 159 if [ -r $@ ] && cmp -s $@ $@.tmp; then \ 160 rm -f $@.tmp; \ 161 else \ 162 echo ' UPDATE $@'; \ 163 mv -f $@.tmp $@; \ 164 fi); 165endef 166 167tags: force 168 $(RM) tags 169 find . -name '*.[ch]' | xargs ctags --extra=+f --c-kinds=+px \ 170 --regex-c++='/_PE\(([^,)]*).*/TEP_ERRNO__\1/' 171 172TAGS: force 173 $(RM) TAGS 174 find . -name '*.[ch]' | xargs etags \ 175 --regex='/_PE(\([^,)]*\).*/TEP_ERRNO__\1/' 176 177define do_install_mkdir 178 if [ ! -d '$(DESTDIR_SQ)$1' ]; then \ 179 $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$1'; \ 180 fi 181endef 182 183define do_install 184 $(call do_install_mkdir,$2); \ 185 $(INSTALL) $(if $3,-m $3,) $1 '$(DESTDIR_SQ)$2' 186endef 187 188define do_install_plugins 189 for plugin in $1; do \ 190 $(call do_install,$$plugin,$(plugin_dir_SQ)); \ 191 done 192endef 193 194define do_generate_dynamic_list_file 195 symbol_type=`$(NM) -u -D $1 | awk 'NF>1 {print $$1}' | \ 196 xargs echo "U w W" | tr 'w ' 'W\n' | sort -u | xargs echo`;\ 197 if [ "$$symbol_type" = "U W" ];then \ 198 (echo '{'; \ 199 $(NM) -u -D $1 | awk 'NF>1 {print "\t"$$2";"}' | sort -u;\ 200 echo '};'; \ 201 ) > $2; \ 202 else \ 203 (echo Either missing one of [$1] or bad version of $(NM)) 1>&2;\ 204 fi 205endef 206 207install: $(PLUGINS) 208 $(call QUIET_INSTALL, trace_plugins) \ 209 $(call do_install_plugins, $(PLUGINS)) 210 211clean: 212 $(call QUIET_CLEAN, trace_plugins) \ 213 $(RM) *.o *~ $(TARGETS) *.a *.so $(VERSION_FILES) .*.d .*.cmd; \ 214 $(RM) $(OUTPUT)libtraceevent-dynamic-list \ 215 $(RM) TRACEEVENT-CFLAGS tags TAGS; 216 217PHONY += force plugins 218force: 219 220# Declare the contents of the .PHONY variable as phony. We keep that 221# information in a variable so we can use it in if_changed and friends. 222.PHONY: $(PHONY) 223