xref: /aosp_15_r20/external/libtraceevent/plugins/Makefile (revision 436bf2bcd5202612ffffe471bbcc1f277cc8d28e) 
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_tmp = lib64
36else
37  libdir_relative_tmp = lib
38endif
39
40libdir_relative ?= $(libdir_relative_tmp)
41prefix ?= /usr/local
42libdir = $(prefix)/$(libdir_relative)
43
44include ../scripts/utils.mk
45
46# copy a bit from Linux kbuild
47
48ifeq ("$(origin V)", "command line")
49  VERBOSE = $(V)
50endif
51ifndef VERBOSE
52  VERBOSE = 0
53endif
54
55# Shell quotes
56plugin_dir_SQ = $(subst ','\'',$(plugin_dir))
57
58CONFIG_INCLUDES =
59CONFIG_LIBS    =
60CONFIG_FLAGS   =
61
62OBJ            = $@
63N              =
64
65INCLUDES = -I. -I.. -I../src -I $(srctree)/include -I $(EP_HEADERS_DIR) $(CONFIG_INCLUDES)
66
67# Set compile option CFLAGS
68ifdef EXTRA_CFLAGS
69  CFLAGS := $(EXTRA_CFLAGS)
70else
71  CFLAGS := -g -Wall
72endif
73
74# Append required CFLAGS
75override CFLAGS += -fPIC
76override CFLAGS += $(CONFIG_FLAGS) $(INCLUDES) $(PLUGIN_DIR_SQ)
77override CFLAGS += $(udis86-flags) -D_GNU_SOURCE
78
79ifeq ($(VERBOSE),1)
80  Q =
81else
82  Q = @
83endif
84
85export srctree OUTPUT CC LD CFLAGS V
86
87DYNAMIC_LIST_FILE := $(bdir)/libtraceevent-dynamic-list
88
89PLUGINS  = plugin_jbd2.so
90PLUGINS += plugin_hrtimer.so
91PLUGINS += plugin_kmem.so
92PLUGINS += plugin_kvm.so
93PLUGINS += plugin_mac80211.so
94PLUGINS += plugin_sched_switch.so
95PLUGINS += plugin_function.so
96PLUGINS += plugin_futex.so
97PLUGINS += plugin_xen.so
98PLUGINS += plugin_scsi.so
99PLUGINS += plugin_cfg80211.so
100PLUGINS += plugin_tlb.so
101
102PLUGINS := $(PLUGINS:%.so=$(bdir)/%.so)
103DEPS := $(PLUGINS:$(bdir)/%.so=$(bdir)/.%.d)
104
105plugins: $(PLUGINS) $(DYNAMIC_LIST_FILE)
106
107$(PLUGINS): | $(bdir)
108$(DEPS): | $(bdir)
109
110$(bdir)/%.so: $(srctree)/plugins/%.c
111	$(Q)$(call do_plugin_build)
112
113define update_dir
114  (echo $1 > $@.tmp;                           \
115   if [ -r $@ ] && cmp -s $@ $@.tmp; then      \
116     rm -f $@.tmp;                             \
117   else                                                \
118     echo '  UPDATE                 $@';       \
119     mv -f $@.tmp $@;                          \
120   fi);
121endef
122
123tags:	force
124	$(RM) tags
125	find . -name '*.[ch]' | xargs ctags --extra=+f --c-kinds=+px \
126	--regex-c++='/_PE\(([^,)]*).*/TEP_ERRNO__\1/'
127
128TAGS:	force
129	$(RM) TAGS
130	find . -name '*.[ch]' | xargs etags \
131	--regex='/_PE(\([^,)]*\).*/TEP_ERRNO__\1/'
132
133define do_install_plugins
134       for plugin in $1; do                            \
135         $(call do_install,$$plugin,$(plugin_dir_SQ)); \
136       done
137endef
138
139define do_generate_dynamic_list_file
140	symbol_type=`$(NM) -u -D $1 | awk 'NF>1 {print $$1}' | \
141	xargs echo "U w W" | tr 'w ' 'W\n' | sort -u | xargs echo`;\
142	if [ "$$symbol_type" = "U W" ];then				\
143		(echo '{';                                              \
144		$(NM) -u -D $1 | awk 'NF>1 {sub("@.*", "", $$2); print "\t"$$2";"}' | sort -u;\
145		echo '};';                                              \
146		) > $2;                                                 \
147	else                                                            \
148		(echo Either missing one of [$1] or bad version of $(NM)) 1>&2;\
149		fi
150endef
151
152$(DYNAMIC_LIST_FILE): $(PLUGINS)
153	$(Q)($(print_gen)$(call do_generate_dynamic_list_file, $(PLUGINS), $@))
154
155install: $(PLUGINS)
156	$(Q)$(call do_install_plugins, $(PLUGINS))
157
158clean:
159	$(Q)$(call do_clean, $(DYNAMIC_LIST_FILE) $(PLUGINS))
160
161PHONY += force plugins $(DYNAMIC_LIST_FILE)
162force:
163
164# Declare the contents of the .PHONY variable as phony.  We keep that
165# information in a variable so we can use it in if_changed and friends.
166.PHONY: $(PHONY)
167