tools/lib/traceevent/plugins/Makefile

   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.
  11 define allow-override
  12   $(if $(or $(findstring environment,$(origin $(1))),\
  13             $(findstring command line,$(origin $(1)))),,\
  14     $(eval $(1) = $(2)))
  15 endef
  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 $(call allow-override,PKG_CONFIG,pkg-config)
  22
  23 EXT = -std=gnu99
  24 INSTALL = install
  25
  26 # Use DESTDIR for installing into a different root directory.
  27 # This is useful for building a package. The program will be
  28 # installed in this directory as if it was the root directory.
  29 # Then the build tool can move it later.
  30 DESTDIR ?=
  31 DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))'
  32
  33 LP64 := $(shell echo __LP64__ | ${CC} ${CFLAGS} -E -x c - | tail -n 1)
  34 ifeq ($(LP64), 1)
  35   libdir_relative_tmp = lib64
  36 else
  37   libdir_relative_tmp = lib
  38 endif
  39
  40 libdir_relative ?= $(libdir_relative_tmp)
  41 prefix ?= /usr/local
  42 libdir = $(prefix)/$(libdir_relative)
  43
  44 set_plugin_dir := 1
  45
  46 # Set plugin_dir to preffered global plugin location
  47 # If we install under $HOME directory we go under
  48 # $(HOME)/.local/lib/traceevent/plugins
  49 #
  50 # We dont set PLUGIN_DIR in case we install under $HOME
  51 # directory, because by default the code looks under:
  52 # $(HOME)/.local/lib/traceevent/plugins by default.
  53 #
  54 ifeq ($(plugin_dir),)
  55 ifeq ($(prefix),$(HOME))
  56 override plugin_dir = $(HOME)/.local/lib/traceevent/plugins
  57 set_plugin_dir := 0
  58 else
  59 override plugin_dir = $(libdir)/traceevent/plugins
  60 endif
  61 endif
  62
  63 ifeq ($(set_plugin_dir),1)
  64 PLUGIN_DIR = -DPLUGIN_DIR="$(plugin_dir)"
  65 PLUGIN_DIR_SQ = '$(subst ','\'',$(PLUGIN_DIR))'
  66 endif
  67
  68 include ../../../scripts/Makefile.include
  69
  70 # copy a bit from Linux kbuild
  71
  72 ifeq ("$(origin V)", "command line")
  73   VERBOSE = $(V)
  74 endif
  75 ifndef VERBOSE
  76   VERBOSE = 0
  77 endif
  78
  79 ifeq ($(srctree),)
  80 srctree := $(patsubst %/,%,$(dir $(CURDIR)))
  81 srctree := $(patsubst %/,%,$(dir $(srctree)))
  82 srctree := $(patsubst %/,%,$(dir $(srctree)))
  83 srctree := $(patsubst %/,%,$(dir $(srctree)))
  84 #$(info Determined 'srctree' to be $(srctree))
  85 endif
  86
  87 export prefix libdir src obj
  88
  89 # Shell quotes
  90 plugin_dir_SQ = $(subst ','\'',$(plugin_dir))
  91
  92 CONFIG_INCLUDES =
  93 CONFIG_LIBS    =
  94 CONFIG_FLAGS   =
  95
  96 OBJ            = $@
  97 N              =
  98
  99 INCLUDES = -I. -I.. -I $(srctree)/tools/include $(CONFIG_INCLUDES)
 100
 101 # Set compile option CFLAGS
 102 ifdef EXTRA_CFLAGS
 103   CFLAGS := $(EXTRA_CFLAGS)
 104 else
 105   CFLAGS := -g -Wall
 106 endif
 107
 108 # Append required CFLAGS
 109 override CFLAGS += -fPIC
 110 override CFLAGS += $(CONFIG_FLAGS) $(INCLUDES) $(PLUGIN_DIR_SQ)
 111 override CFLAGS += $(udis86-flags) -D_GNU_SOURCE
 112
 113 ifeq ($(VERBOSE),1)
 114   Q =
 115 else
 116   Q = @
 117 endif
 118
 119 # Disable command line variables (CFLAGS) override from top
 120 # level Makefile (perf), otherwise build Makefile will get
 121 # the same command line setup.
 122 MAKEOVERRIDES=
 123
 124 export srctree OUTPUT CC LD CFLAGS V
 125
 126 build := -f $(srctree)/tools/build/Makefile.build dir=. obj
 127
 128 DYNAMIC_LIST_FILE := $(OUTPUT)libtraceevent-dynamic-list
 129
 130 PLUGINS  = plugin_jbd2.so
 131 PLUGINS += plugin_hrtimer.so
 132 PLUGINS += plugin_kmem.so
 133 PLUGINS += plugin_kvm.so
 134 PLUGINS += plugin_mac80211.so
 135 PLUGINS += plugin_sched_switch.so
 136 PLUGINS += plugin_function.so
 137 PLUGINS += plugin_xen.so
 138 PLUGINS += plugin_scsi.so
 139 PLUGINS += plugin_cfg80211.so
 140
 141 PLUGINS    := $(addprefix $(OUTPUT),$(PLUGINS))
 142 PLUGINS_IN := $(PLUGINS:.so=-in.o)
 143
 144 plugins: $(PLUGINS) $(DYNAMIC_LIST_FILE)
 145
 146 __plugin_obj = $(notdir $@)
 147   plugin_obj = $(__plugin_obj:-in.o=)
 148
 149 $(PLUGINS_IN): force
 150         $(Q)$(MAKE) $(build)=$(plugin_obj)
 151
 152 $(OUTPUT)libtraceevent-dynamic-list: $(PLUGINS)
 153         $(QUIET_GEN)$(call do_generate_dynamic_list_file, $(PLUGINS), $@)
 154
 155 $(OUTPUT)%.so: $(OUTPUT)%-in.o
 156         $(QUIET_LINK)$(CC) $(CFLAGS) -shared $(LDFLAGS) -nostartfiles -o $@ $^
 157
 158 define update_dir
 159   (echo $1 > $@.tmp;                           \
 160    if [ -r $@ ] && cmp -s $@ $@.tmp; then      \
 161      rm -f $@.tmp;                             \
 162    else                                                \
 163      echo '  UPDATE                 $@';       \
 164      mv -f $@.tmp $@;                          \
 165    fi);
 166 endef
 167
 168 tags:   force
 169         $(RM) tags
 170         find . -name '*.[ch]' | xargs ctags --extra=+f --c-kinds=+px \
 171         --regex-c++='/_PE\(([^,)]*).*/TEP_ERRNO__\1/'
 172
 173 TAGS:   force
 174         $(RM) TAGS
 175         find . -name '*.[ch]' | xargs etags \
 176         --regex='/_PE(\([^,)]*\).*/TEP_ERRNO__\1/'
 177
 178 define do_install_mkdir
 179         if [ ! -d '$(DESTDIR_SQ)$1' ]; then             \
 180                 $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$1'; \
 181         fi
 182 endef
 183
 184 define do_install
 185         $(call do_install_mkdir,$2);                    \
 186         $(INSTALL) $(if $3,-m $3,) $1 '$(DESTDIR_SQ)$2'
 187 endef
 188
 189 define do_install_plugins
 190        for plugin in $1; do                            \
 191          $(call do_install,$$plugin,$(plugin_dir_SQ)); \
 192        done
 193 endef
 194
 195 define do_generate_dynamic_list_file
 196         symbol_type=`$(NM) -u -D $1 | awk 'NF>1 {print $$1}' | \
 197         xargs echo "U w W" | tr 'w ' 'W\n' | sort -u | xargs echo`;\
 198         if [ "$$symbol_type" = "U W" ];then                             \
 199                 (echo '{';                                              \
 200                 $(NM) -u -D $1 | awk 'NF>1 {print "\t"$$2";"}' | sort -u;\
 201                 echo '};';                                              \
 202                 ) > $2;                                                 \
 203         else                                                            \
 204                 (echo Either missing one of [$1] or bad version of $(NM)) 1>&2;\
 205                 fi
 206 endef
 207
 208 install: $(PLUGINS)
 209         $(call QUIET_INSTALL, trace_plugins) \
 210         $(call do_install_plugins, $(PLUGINS))
 211
 212 clean:
 213         $(call QUIET_CLEAN, trace_plugins) \
 214                 $(RM) *.o *~ $(TARGETS) *.a *.so $(VERSION_FILES) .*.d .*.cmd; \
 215                 $(RM) $(OUTPUT)libtraceevent-dynamic-list \
 216                 $(RM) TRACEEVENT-CFLAGS tags TAGS;
 217
 218 PHONY += force plugins
 219 force:
 220
 221 # Declare the contents of the .PHONY variable as phony.  We keep that
 222 # information in a variable so we can use it in if_changed and friends.
 223 .PHONY: $(PHONY)