[PATCH 2/3] Makefile: fix "cscope" target to refer to cscope.out

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

The cscope target added in a2a9150bf06 (makefile: Add a cscope target,
2007-10-06) has for some reason been referring to cscope* instead of
cscope.out. Let's generate the cscope.out file directly so we don't
need to speculate.

The "-fcscope.out" (note, no whitespace) argument is enabled by
default on my system's cscope 15.9, but let's provide it explicitly
for good measure.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 .gitignore | 2 +-
 Makefile   | 9 +++++----
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/.gitignore b/.gitignore
index 311841f9bed..d74029c1ca7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -217,7 +217,7 @@
 /.vscode/
 /tags
 /TAGS
-/cscope*
+/cscope.out
 /compile_commands.json
 *.hcc
 *.obj
diff --git a/Makefile b/Makefile
index 4dd9711a653..25d2a3e5ddc 100644
--- a/Makefile
+++ b/Makefile
@@ -2737,10 +2737,11 @@ tags: FORCE
 	$(FIND_SOURCE_FILES) | xargs ctags -a -o tags+ && \
 	mv tags+ tags
 
+cscope.out:
+	$(FIND_SOURCE_FILES) | xargs cscope -f$@ -b
+
 .PHONY: cscope
-cscope:
-	$(RM) cscope*
-	$(FIND_SOURCE_FILES) | xargs cscope -b
+cscope: cscope.out
 
 ### Detect prefix changes
 TRACK_PREFIX = $(bindir_SQ):$(gitexecdir_SQ):$(template_dir_SQ):$(prefix_SQ):\
@@ -3211,7 +3212,7 @@ clean: profile-clean coverage-clean cocciclean
 	$(RM) $(HCC)
 	$(RM) -r bin-wrappers $(dep_dirs) $(compdb_dir) compile_commands.json
 	$(RM) -r po/build/
-	$(RM) *.pyc *.pyo */*.pyc */*.pyo $(GENERATED_H) $(ETAGS_TARGET) tags cscope*
+	$(RM) *.pyc *.pyo */*.pyc */*.pyo $(GENERATED_H) $(ETAGS_TARGET) tags cscope.out
 	$(RM) -r .dist-tmp-dir .doc-tmp-dir
 	$(RM) $(GIT_TARNAME).tar.gz
 	$(RM) $(htmldocs).tar.gz $(manpages).tar.gz
-- 
2.32.0.599.g3967b4fa4ac