tools build: Build fixdep helper from perf and basic libs

Adding the fixdep target into the Makefile.include to ease up building of
fixdep helper, that needs to be built before we dive in to the build itself.
The user can invoke the fixdep target to build the helper.

Signed-off-by: Jiri Olsa <[e-mail]>
Cc: David Ahern <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/build/Documentation/Build.txt

···
       make $(build)=ex
 
 
+Fixdep
+------
+It is necessary to build the fixdep helper before invoking the build.
+The Makefile.include file adds the fixdep target, that could be
+invoked by the user.
+
+
 Rules
 -----
 

tools/build/Makefile.include

···
 build := -f $(srctree)/tools/build/Makefile.build dir=. obj
+
+fixdep:
+	$(Q)$(MAKE) -C $(srctree)/tools/build fixdep
+
+.PHONY: fixdep

tools/build/tests/ex/Makefile

···
 export LD      := ld
 export AR      := ar
 
+ex:
+
 include $(srctree)/tools/build/Makefile.include
 
 ex: ex-in.o libex-in.o
 	gcc -o $@ $^
 
-ex.%: FORCE
+ex.%: fixdep FORCE
 	make -f $(srctree)/tools/build/Makefile.build dir=. $@
 
-ex-in.o: FORCE
+ex-in.o: fixdep FORCE
 	make $(build)=ex
 
-libex-in.o: FORCE
+libex-in.o: fixdep FORCE
 	make $(build)=libex
 
 clean:

tools/lib/api/Makefile

···
 
 API_IN := $(OUTPUT)libapi-in.o
 
+all:
+
 export srctree OUTPUT CC LD CFLAGS V
 include $(srctree)/tools/build/Makefile.include
 
-all: $(LIBFILE)
+all: fixdep $(LIBFILE)
 
 $(API_IN): FORCE
 	@$(MAKE) $(build)=libapi

tools/lib/bpf/Makefile

···
 # the same command line setup.
 MAKEOVERRIDES=
 
+all:
+
 export srctree OUTPUT CC LD CFLAGS V
 include $(srctree)/tools/build/Makefile.include
 
···
 
 TARGETS = $(CMD_TARGETS)
 
-all: $(VERSION_FILES) all_cmd
+all: fixdep $(VERSION_FILES) all_cmd
 
 all_cmd: $(CMD_TARGETS)
 

tools/lib/lockdep/Makefile

···
   print_install =		echo '  INSTALL  '$1'	to	$(DESTDIR_SQ)$2';
 endif
 
+all:
+
 export srctree OUTPUT CC LD CFLAGS V
 include $(srctree)/tools/build/Makefile.include
 
···
 TARGETS = $(CMD_TARGETS)
 
 
-all: all_cmd
+all: fixdep all_cmd
 
 all_cmd: $(CMD_TARGETS)
 

tools/perf/Makefile.perf

···
 	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $(LIBTRACEEVENT_DYNAMIC_LIST_LDFLAGS) \
 		$(PERF_IN) $(LIBS) -o $@
 
-$(GTK_IN): FORCE
+$(GTK_IN): fixdep FORCE
 	$(Q)$(MAKE) $(build)=gtk
 
 $(OUTPUT)libperf-gtk.so: $(GTK_IN) $(PERFLIBS)
···
 __build-dir = $(subst $(OUTPUT),,$(dir $@))
 build-dir   = $(if $(__build-dir),$(__build-dir),.)
 
-prepare: $(OUTPUT)PERF-VERSION-FILE $(OUTPUT)common-cmds.h
+prepare: $(OUTPUT)PERF-VERSION-FILE $(OUTPUT)common-cmds.h fixdep
 
 $(OUTPUT)%.o: %.c prepare FORCE
 	$(Q)$(MAKE) -f $(srctree)/tools/build/Makefile.build dir=$(build-dir) $@
···
 
 LIBPERF_IN := $(OUTPUT)libperf-in.o
 
-$(LIBPERF_IN): FORCE
+$(LIBPERF_IN): fixdep FORCE
 	$(Q)$(MAKE) $(build)=libperf
 
 $(LIB_FILE): $(LIBPERF_IN)
···
 
 LIBTRACEEVENT_FLAGS += plugin_dir=$(plugindir_SQ)
 
-$(LIBTRACEEVENT): FORCE
+$(LIBTRACEEVENT): fixdep FORCE
 	$(Q)$(MAKE) -C $(TRACE_EVENT_DIR) $(LIBTRACEEVENT_FLAGS) O=$(OUTPUT) $(OUTPUT)libtraceevent.a
 
-libtraceevent_plugins: FORCE
+libtraceevent_plugins: fixdep FORCE
 	$(Q)$(MAKE) -C $(TRACE_EVENT_DIR) $(LIBTRACEEVENT_FLAGS) O=$(OUTPUT) plugins
 
 $(LIBTRACEEVENT_DYNAMIC_LIST): libtraceevent_plugins
···
 install-traceevent-plugins: $(LIBTRACEEVENT)
 	$(Q)$(MAKE) -C $(TRACE_EVENT_DIR) $(LIBTRACEEVENT_FLAGS) O=$(OUTPUT) install_plugins
 
-$(LIBAPI): FORCE
+$(LIBAPI): fixdep FORCE
 	$(Q)$(MAKE) -C $(LIB_DIR) O=$(OUTPUT) $(OUTPUT)libapi.a
 
 $(LIBAPI)-clean: