[PATCH] kconfig: fix the failure of `make rpm-pkg` after localversion file changed

[Adam Lee]

`make rpm-pkg` and `make binrpm-pkg` will write $KERNELRELEASE into rpm
spec files which don't depend on localversion file now. So, the
unchanged spec files will cause failure after localversion file changed.

I added the localversion file into the dependencies of spec files.
Because that file is not necessary, I made it a empty target, so its
last-modification time will be checked by Make only when it exists.

Signed-off-by: Adam Lee <adam8157@xxxxxxxxx>
---
 scripts/package/Makefile |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/scripts/package/Makefile b/scripts/package/Makefile
index 87bf080..a7c1f59 100644
--- a/scripts/package/Makefile
+++ b/scripts/package/Makefile
@@ -30,9 +30,12 @@ KERNELPATH := kernel-$(subst -,_,$(KERNELRELEASE))
 MKSPEC     := $(srctree)/scripts/package/mkspec
 PREV       := set -e; cd -P ..;
 
+# localversion, its last-modification time will be checked only when it exists
+localversion:
+
 # rpm-pkg
 # ---------------------------------------------------------------------------
-$(objtree)/kernel.spec: $(MKSPEC) $(srctree)/Makefile
+$(objtree)/kernel.spec: $(MKSPEC) $(srctree)/Makefile localversion
 	$(CONFIG_SHELL) $(MKSPEC) > $@
 
 rpm-pkg rpm: $(objtree)/kernel.spec FORCE
@@ -60,7 +63,7 @@ clean-files := $(objtree)/kernel.spec
 
 # binrpm-pkg
 # ---------------------------------------------------------------------------
-$(objtree)/binkernel.spec: $(MKSPEC) $(srctree)/Makefile
+$(objtree)/binkernel.spec: $(MKSPEC) $(srctree)/Makefile localversion
 	$(CONFIG_SHELL) $(MKSPEC) prebuilt > $@
 
 binrpm-pkg: $(objtree)/binkernel.spec FORCE
-- 
1.7.10.4

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