kbuild: Automatically remove stale <linux/version.h> file

In 3.7, the file moved from include/linux/ to
include/generated/uapi/linux/. The path in the #include directive
remained the same for compatibility reasons, but this created a problem
when bisecting. Commit 9c8cdb71 (kbuild: unconditionally clobber
include/linux/version.h on distclean) fixes this, provided the user does
make distclean between builds. Better not rely on the user and delete
the stale file each time make is invoked.

Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>

diff --git a/Makefile b/Makefile
index 88b7fa50f619c40cf439b596d9a84e810d73c73d..107eb9ed648f31ceb705c28bd6bed527237f6b9b 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -480,6 +480,7 @@ asm-generic:
 # of make so .config is not included in this case either (for *config).
 
 version_h := include/generated/uapi/linux/version.h
+old_version_h := include/linux/version.h
 
 no-dot-config-targets := clean mrproper distclean \
                         cscope gtags TAGS tags help %docs check% coccicheck \
@@ -1004,6 +1005,7 @@ endef
 
 $(version_h): $(srctree)/Makefile FORCE
        $(call filechk,version.h)
+       $(Q)rm -f $(old_version_h)
 
 include/generated/utsrelease.h: include/config/kernel.release FORCE
        $(call filechk,utsrelease.h)
@@ -1172,7 +1174,7 @@ MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
                  Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
                  signing_key.priv signing_key.x509 x509.genkey         \
                  extra_certificates signing_key.x509.keyid             \
-                 signing_key.x509.signer include/linux/version.h
+                 signing_key.x509.signer
 
 # clean - Delete most, but leave enough to build external modules
 #