[PATCH] scripts/package/Makefile: compare objtree with srctree instead of test KBUILD_OUTPUT

[Bin Wang]

KBUILD_OUTPUT is always empty here, so it is useless to test it. But
while use O=.., objtree and srctree will be different. I compare them
instead.
---
 scripts/package/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/package/Makefile b/scripts/package/Makefile
index 87bf080..d7b3285 100644
--- a/scripts/package/Makefile
+++ b/scripts/package/Makefile
@@ -36,7 +36,7 @@ $(objtree)/kernel.spec: $(MKSPEC) $(srctree)/Makefile
 	$(CONFIG_SHELL) $(MKSPEC) > $@
 
 rpm-pkg rpm: $(objtree)/kernel.spec FORCE
-	@if test -n "$(KBUILD_OUTPUT)"; then \
+	@if test "$(objtree)" != "$(srctree)"; then \
 		echo "Building source + binary RPM is not possible outside the"; \
 		echo "kernel source tree. Don't set KBUILD_OUTPUT, or use the"; \
 		echo "binrpm-pkg target instead."; \
-- 
1.8.1.4

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