[PATCH 3.16 16/63] kbuild: setlocalversion: print error to STDERR

[Ben Hutchings]

3.16.81-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Wolfram Sang <wsa@xxxxxxxxxxxxx>

commit 78283edf2c01c38eb840a3de5ffd18fe2992ab64 upstream.

I tried to use 'make O=...' from an unclean source tree. This triggered
the error path of setlocalversion. But by printing to STDOUT, it created
a broken localversion which then caused another (unrelated) error:

"4.7.0-rc2Error: kernelrelease not valid - run make prepare to update it" exceeds 64 characters

After printing to STDERR, the true build error gets displayed later:

  /home/wsa/Kernel/linux is not clean, please run 'make mrproper'
  in the '/home/wsa/Kernel/linux' directory.

Signed-off-by: Wolfram Sang <wsa@xxxxxxxxxxxxx>
Signed-off-by: Michal Marek <mmarek@xxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
 scripts/setlocalversion | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/scripts/setlocalversion
+++ b/scripts/setlocalversion
@@ -143,7 +143,7 @@ fi
 if test -e include/config/auto.conf; then
 	. include/config/auto.conf
 else
-	echo "Error: kernelrelease not valid - run 'make prepare' to update it"
+	echo "Error: kernelrelease not valid - run 'make prepare' to update it" >&2
 	exit 1
 fi