[PATCH] kbuild: adjust .version updating

In order to maintain a more correct build number, updates to the
version
number should only be commited after a successful link of vmlinux, not
before (so that errors in the link process don't lead to pointless
increments).

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

1 files changed, 8 insertions, 2 deletions

diff --git a/Makefile b/Makefile
index 6a405882b1f7..485a11a1985f 100644
--- a/Makefile
+++ b/Makefile
@@ -641,8 +641,13 @@ quiet_cmd_vmlinux__ ?= LD      $@
 # Generate new vmlinux version
 quiet_cmd_vmlinux_version = GEN     .version
       cmd_vmlinux_version = set -e;                     \
-        . $(srctree)/scripts/mkversion > .tmp_version;  \
-        mv -f .tmp_version .version;                    \
+        if [ ! -r .version ]; then                      \
+          rm -f .version;                               \
+          echo 1 >.version;                             \
+        else                                            \
+          mv .version .old_version;                     \
+          expr 0$$(cat .old_version) + 1 >.version;     \
+        fi;                                             \
         $(MAKE) $(build)=init
 
 # Generate System.map
@@ -756,6 +761,7 @@ endif # ifdef CONFIG_KALLSYMS
 # vmlinux image - including updated kernel symbols
 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
         $(call if_changed_rule,vmlinux__)
+        $(Q)rm -f .old_version
 
 # The actual objects are generated when descending, 
 # make sure no implicit rule kicks in