1 files changed, 87 insertions, 18 deletions
diff --git a/tools/tracing/latency/Makefile b/tools/tracing/latency/Makefile
index 40c4ddaf8be164..6518b03e05c71b 100644
--- a/tools/tracing/latency/Makefile
+++ b/tools/tracing/latency/Makefile
@@ -1,24 +1,93 @@
-# SPDX-License-Identifier: GPL-2.0
-# Makefile for vm tools
-#
-VAR_CFLAGS := $(shell pkg-config --cflags libtracefs 2>/dev/null)
-VAR_LDLIBS := $(shell pkg-config --libs libtracefs 2>/dev/null)
+# SPDX-License-Identifier: GPL-2.0-only
 
-TARGETS = latency-collector
-CFLAGS = -Wall -Wextra -g -O2 $(VAR_CFLAGS)
-LDFLAGS = -lpthread $(VAR_LDLIBS)
+ifeq ($(srctree),)
+  srctree	:= $(patsubst %/,%,$(dir $(CURDIR)))
+  srctree	:= $(patsubst %/,%,$(dir $(srctree)))
+  srctree	:= $(patsubst %/,%,$(dir $(srctree)))
+endif
 
-all: $(TARGETS)
+include $(srctree)/tools/scripts/Makefile.include
 
-%: %.c
-	$(CC) $(CFLAGS) -o $@ $< $(LDFLAGS)
+# O is an alias for OUTPUT
+OUTPUT		:= $(O)
 
-clean:
-	$(RM) latency-collector
+ifeq ($(OUTPUT),)
+  OUTPUT	:= $(CURDIR)
+else
+  # subdir is used by the ../Makefile in $(call descend,)
+  ifneq ($(subdir),)
+    OUTPUT	:= $(OUTPUT)/$(subdir)
+  endif
+endif
+
+ifneq ($(patsubst %/,,$(lastword $(OUTPUT))),)
+  OUTPUT	:= $(OUTPUT)/
+endif
+
+LATENCY-COLLECTOR	:= $(OUTPUT)latency-collector
+LATENCY-COLLECTOR_IN	:= $(LATENCY-COLLECTOR)-in.o
+
+export CC	:= gcc
+export LD	:= ld
+export AR	:= ar
+export PKG_CONFIG := pkg-config
+
+FEATURE_TESTS	:= libtraceevent
+FEATURE_TESTS	+= libtracefs
+FEATURE_DISPLAY	:= libtraceevent
+FEATURE_DISPLAY	+= libtracefs
+
+ifeq ($(V),1)
+  Q 		=
+else
+  Q 		= @
+endif
+
+all: $(LATENCY-COLLECTOR)
+
+include $(srctree)/tools/build/Makefile.include
+
+# check for dependencies only on required targets
+NON_CONFIG_TARGETS := clean install
 
-prefix ?= /usr/local
-sbindir ?= ${prefix}/sbin
+config		:= 1
+ifdef MAKECMDGOALS
+ifeq ($(filter-out $(NON_CONFIG_TARGETS),$(MAKECMDGOALS)),)
+ config		:= 0
+endif
+endif
 
-install: all
-	install -d $(DESTDIR)$(sbindir)
-	install -m 755 -p $(TARGETS) $(DESTDIR)$(sbindir)
+ifeq ($(config),1)
+  include $(srctree)/tools/build/Makefile.feature
+  include Makefile.config
+endif
+
+CFLAGS		+= $(INCLUDES) $(LIB_INCLUDES)
+
+export CFLAGS OUTPUT srctree
+
+$(LATENCY-COLLECTOR): $(LATENCY-COLLECTOR_IN)
+	$(QUIET_LINK)$(CC) $(LDFLAGS) -o $(LATENCY-COLLECTOR) $(LATENCY-COLLECTOR_IN) $(EXTLIBS)
+
+latency-collector.%: fixdep FORCE
+	make -f $(srctree)/tools/build/Makefile.build dir=. $@
+
+$(LATENCY-COLLECTOR_IN): fixdep FORCE
+	make $(build)=latency-collector
+
+INSTALL		:= install
+MKDIR		:= mkdir
+STRIP		:= strip
+BINDIR		:= /usr/bin
+
+install:
+	@$(MKDIR) -p $(DESTDIR)$(BINDIR)
+	$(call QUIET_INSTALL,latency-collector)$(INSTALL) $(LATENCY-COLLECTOR) -m 755 $(DESTDIR)$(BINDIR)
+	@$(STRIP) $(DESTDIR)$(BINDIR)/latency-collector
+
+clean:
+	$(call QUIET_CLEAN, latency-collector)
+	$(Q)find . -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
+	$(Q)@rm -f latency-collector fixdep FEATURE-DUMP
+	$(Q)rm -rf feature
+.PHONY: FORCE clean install