some problems with latest cscope-15.6, the better way to generate cscope database change

[rae l]

From: Denis ChengRq <crquan@xxxxxxxxx>

It's a problem about cscope target of kernel Makefile, and the cscope
plugin of emacs:
1. `make cscope` will generate cscope.files cscope.{in,po,}.out;
2. the cscope plugin expect a cscope.out.{in,po,};
3. the default `cscope -b` would generate cscope.{in,po,}.out;

There are three approach to solve it:
1. modify the cscope C code;
2. modify the cscope emacs plugin lisp code;
3. modify the Makefile;

I have tried to communicate with the cscope upstream, but later I
realize the third approach is most meaningful.
So here is the one line patch:

---

diff --git a/Makefile b/Makefile
index f156f40..9148c3f 100644
--- a/Makefile
+++ b/Makefile
@@ -1492,7 +1492,7 @@ quiet_cmd_cscope-file = FILELST cscope.files
       cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files

 quiet_cmd_cscope = MAKE    cscope.out
-      cmd_cscope = cscope -b
+      cmd_cscope = cscope -b -f cscope.out

 cscope: FORCE
 	$(call cmd,cscope-file)
--
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