make: Generate crtools version from Makefile definition

This allows us to have a unique place where version lives
and what is more important other subsystems (such as docs
generation) may reuse version definitions.

At moment EXTRA (which corresponds kernels -rc tag) and
NAME is not yet used, but I desided to put them in place
for future needs.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

.gitignore

@@ -17,3 +17,4 @@ include/syscall.h
 include/syscall-codes.h
 protobuf/*.c
 protobuf/*.h
+include/version.h

Makefile

@@ -87,6 +87,8 @@ PROTOBUF-LIB	= $(SRC_DIR)/protobuf/protobuf-lib.o
 export E Q CC ECHO MAKE CFLAGS LIBS ARCH DEFINES MAKEFLAGS
 export SRC_DIR SYSCALL-LIB SH ARCH_DIR OBJCOPY LDARCH
 
+include scripts/Makefile.version
+
 PROGRAM		:= crtools
 
 OBJS		+= parasite-syscall.o
@@ -144,7 +146,7 @@ ifeq ($(GCOV),1)
 %.o $(PROGRAM): override CFLAGS += --coverage
 endif
 
-all: pie
+all: pie $(VERSION_HEADER)
 	$(Q) $(MAKE) $(PROGRAM)
 
 pie: protobuf $(ARCH)
@@ -192,6 +194,7 @@ rebuild:
 
 clean:
 	$(E) "  CLEAN"
+	$(Q) $(RM) $(VERSION_HEADER)
 	$(Q) $(RM) -f ./*.o
 	$(Q) $(RM) -f ./*.d
 	$(Q) $(RM) -f ./*.i

crtools.c

@@ -21,6 +21,7 @@
 #include "files.h"
 #include "sk-inet.h"
 #include "net.h"
+#include "version.h"
 
 struct cr_options opts;
 
@@ -226,7 +227,7 @@ int main(int argc, char *argv[])
 			opts.handle_file_locks = true;
 			break;
 		case 'V':
-			pr_msg("Version: %d.%d\n", CRIU_VERSION_MAJOR, CRIU_VERSION_MINOR);
+			pr_msg("Version: %s\n", version);
 			return 0;
 		case 'h':
 		default:

include/crtools.h

@@ -14,9 +14,6 @@
 
 #define CR_FD_PERM		(S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH)
 
-#define CRIU_VERSION_MAJOR	0
-#define CRIU_VERSION_MINOR	3
-
 enum {
 	CR_FD_INVENTORY,
 	/*

scripts/Makefile.version

+VERSION_MAJOR		:= 0
+VERSION_MINOR		:= 3
+VERSION_SUBLEVEL	:=
+VERSION_EXTRA		:=
+VERSION_NAME		:=
+
+CRTOOLSVERSION		:= $(VERSION_MAJOR)$(if $(VERSION_MINOR),.$(VERSION_MINOR))$(if $(VERSION_SUBLEVEL),.$(VERSION_SUBLEVEL))
+
+export VERSION_MAJOR VERSION_MINOR
+
+VERSION_HEADER := include/version.h
+
+$(VERSION_HEADER): scripts/Makefile.version
+	$(E) "  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 "static char version[] = {"				>> $(VERSION_HEADER)
+	$(Q) echo \"$(CRTOOLSVERSION)\"					>> $(VERSION_HEADER)
+	$(Q) echo "};"							>> $(VERSION_HEADER)
+	$(Q) echo "#define CRIU_VERSION_MAJOR " $(VERSION_MAJOR)	>> $(VERSION_HEADER)
+	$(Q) echo "#define CRIU_VERSION_MINOR " $(VERSION_MINOR)	>> $(VERSION_HEADER)
+	$(Q) echo "#endif /* __CR_VERSION_H__ */"			>> $(VERSION_HEADER)