Makefile: surround make -C kafel clean with ifdefs

diff --git a/Makefile b/Makefile
index 2485209fb16ba30d963c531f377e2e2dd319c62d..22f9eb944fcfc2f25594c54b3c4791075ebe32dc 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -98,7 +98,9 @@ $(PROTO_DEPS): config.proto
 
 clean:
        $(RM) core Makefile.bak $(OBJS) $(BIN)
+ifneq ("$(wildcard kafel/Makefile)","")
        $(MAKE) -C kafel clean
+endif
 
 depend:
        makedepend -Y -Ykafel/include -- -- $(SRCS)