scripts/Makefile.clean: Make Kbuild and Makefile optional

During cleaning, some directories might not have a Makefile or Kbuild
file.  Previously scripts/Makefile.clean would spit out the following
error when neither file could be found:
ptyser@petert busybox $ make mrproper
scripts/Makefile.clean:17: /home/user/busybox/findutils/Makefile: No such file or directory
make[1]: *** No rule to make target `/home/user/busybox/findutils/Makefile'.  Stop.
make: *** [_clean_findutils] Error 2

This issue can be triggered by running 'make mrproper' in a freshly
cloned busybox repository.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/scripts/Makefile.clean b/scripts/Makefile.clean
index cff33498fa16a8edcdd872bfaf2da13f6cbae4d2..03e397f42d5ee5887c8c12b53f821af516ee3bae 100644 (file)
--- a/scripts/Makefile.clean
+++ b/scripts/Makefile.clean
@@ -14,7 +14,7 @@ clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
 
 # The filename Kbuild has precedence over Makefile
 kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
-include $(if $(wildcard $(kbuild-dir)/Kbuild), $(kbuild-dir)/Kbuild, $(kbuild-dir)/Makefile)
+-include $(if $(wildcard $(kbuild-dir)/Kbuild), $(kbuild-dir)/Kbuild, $(kbuild-dir)/Makefile)
 
 # Figure out what we need to build from the various variables
 # ==========================================================================