build: Generate criu version from toplevel

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Reviewed-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

Makefile

@@ -6,11 +6,6 @@ export __nmk_dir
 include $(__nmk_dir)/include.mk
 include $(__nmk_dir)/macro.mk
 
-#
-# Import tools versions early
-# so subsequents may refer them.
-include Makefile.versions
-
 #
 # To build host helpers.
 HOSTCC		?= gcc
@@ -140,6 +135,44 @@ endif
 
 CFLAGS			+= $(WARNINGS) $(DEFINES)
 
+#
+# Version headers.
+include Makefile.versions
+
+VERSION_HEADER		:= $(SRC_DIR)/criu/include/version.h
+GITID_FILE		:= .gitid
+GITID			:= $(shell if [ -d ".git" ]; then git describe; fi)
+
+ifeq ($(GITID),)
+        GITID := 0
+else
+        GITID_FILE_VALUE := $(shell if [ -f '$(GITID_FILE)' ]; then if [ `cat '$(GITID_FILE)'` = $(GITID) ]; then echo y; fi; fi)
+        ifneq ($(GITID_FILE_VALUE),y)
+                .PHONY: $(GITID_FILE)
+        endif
+endif
+
+$(GITID_FILE):
+	$(call msg-gen, $@)
+	$(Q) echo "$(GITID)" > $(GITID_FILE)
+
+$(VERSION_HEADER): Makefile.versions $(GITID_FILE)
+	$(call msg-gen, $@)
+	$(Q) echo "/* Autogenerated, do not edit */"			 	 > $@
+	$(Q) echo "#ifndef __CR_VERSION_H__"					>> $@
+	$(Q) echo "#define __CR_VERSION_H__"					>> $@
+	$(Q) echo "#define CRIU_VERSION \"$(CRIU_VERSION)\""			>> $@
+	$(Q) echo "#define CRIU_VERSION_MAJOR " $(CRIU_VERSION_MAJOR)		>> $@
+	$(Q) echo "#define CRIU_VERSION_MINOR " $(CRIU_VERSION_MINOR)		>> $@
+ifneq ($(CRIU_VERSION_SUBLEVEL),)
+	$(Q) echo "#define CRIU_VERSION_SUBLEVEL " $(CRIU_VERSION_SUBLEVEL)	>> $@
+endif
+ifneq ($(CRIU_VERSION_EXTRA),)
+	$(Q) echo "#define CRIU_VERSION_EXTRA " $(CRIU_VERSION_EXTRA)		>> $@
+endif
+	$(Q) echo "#define CRIU_GITID \"$(GITID)\""				>> $@
+	$(Q) echo "#endif /* __CR_VERSION_H__ */"				>> $@
+
 #
 # Protobuf images first, they are not depending
 # on anything else.
@@ -153,9 +186,9 @@ $(eval $(call gen-built-in,images))
 #
 # But note that we're already included
 # the nmk so we can reuse it there.
-criu/%: images/built-in.o
+criu/%: images/built-in.o $(VERSION_HEADER)
 	$(Q) $(MAKE) -C criu $@
-criu: images/built-in.o
+criu: images/built-in.o $(VERSION_HEADER)
 	$(Q) $(MAKE) -C criu all
 .PHONY: criu
 
@@ -188,6 +221,7 @@ clean: subclean
 mrproper: subclean
 	$(Q) $(MAKE) $(build)=images $@
 	$(Q) $(MAKE) -C criu $@
+	$(Q) $(RM) $(VERSION_HEADER)
 	$(Q) $(RM) cscope.*
 	$(Q) $(RM) tags TAGS
 .PHONY: mrproper

criu/Makefile

@@ -79,10 +79,6 @@ endif
 # msg-* printing
 include $(__nmk_dir)/msg.mk
 
-#
-# Version header file.
-include Makefile.version
-
 #
 # Configure variables.
 include Makefile.config

criu/Makefile.version

-include $(__nmk_dir)msg.mk
-
-VERSION_HEADER		:= include/version.h
-GITID_FILE		:= ../.gitid
-GITID			:= $(shell if [ -d "../.git" ]; then cd .. && git describe; fi)
-
-ifeq ($(GITID),)
-        GITID := 0
-else
-        GITID_FILE_VALUE := $(shell if [ -f '$(GITID_FILE)' ]; then if [ `cat '$(GITID_FILE)'` = $(GITID) ]; then echo y; fi; fi)
-        ifneq ($(GITID_FILE_VALUE),y)
-                .PHONY: $(GITID_FILE)
-        endif
-endif
-
-$(GITID_FILE):
-	$(call msg-gen, $@)
-	$(Q) echo "$(GITID)" > $(GITID_FILE)
-
-$(VERSION_HEADER): ../Makefile.versions $(GITID_FILE)
-	$(call msg-gen, $@)
-	$(Q) echo "/* Autogenerated, do not edit */"			 	 > $(VERSION_HEADER)
-	$(Q) echo "#ifndef __CR_VERSION_H__"					>> $(VERSION_HEADER)
-	$(Q) echo "#define __CR_VERSION_H__"					>> $(VERSION_HEADER)
-	$(Q) echo "#define CRIU_VERSION \"$(CRIU_VERSION)\""			>> $(VERSION_HEADER)
-	$(Q) echo "#define CRIU_VERSION_MAJOR " $(CRIU_VERSION_MAJOR)		>> $(VERSION_HEADER)
-	$(Q) echo "#define CRIU_VERSION_MINOR " $(CRIU_VERSION_MINOR)		>> $(VERSION_HEADER)
-ifneq ($(CRIU_VERSION_SUBLEVEL),)
-	$(Q) echo "#define CRIU_VERSION_SUBLEVEL " $(CRIU_VERSION_SUBLEVEL)	>> $(VERSION_HEADER)
-endif
-ifneq ($(CRIU_VERSION_EXTRA),)
-	$(Q) echo "#define CRIU_VERSION_EXTRA " $(CRIU_VERSION_EXTRA)		>> $(VERSION_HEADER)
-endif
-	$(Q) echo "#define CRIU_GITID \"$(GITID)\""				>> $(VERSION_HEADER)
-	$(Q) echo "#endif /* __CR_VERSION_H__ */"				>> $(VERSION_HEADER)
-
-Makefile.version:
-	@true