kbuild: specify absolute paths for cscope

Cscope doesn't hadle relative paths when cscope.out is not in $PWD. Use
absolute paths when generating cscope.files, which seems to be the
recommended way to generate cscope.out, anyway (at least according to
cscope.sf.net). The speed and size differences are minimal, the only
drawback is that the database needs to be regenerated if the source
directory is moved.

[mmarek: fixed for O= builds, modified changelog]

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Michal Marek <mmarek@suse.cz>

1 files changed, 7 insertions, 1 deletions

diff --git a/scripts/tags.sh b/scripts/tags.sh
index d52f7a01557c..1a0c44d7c4a7 100755
--- a/scripts/tags.sh
+++ b/scripts/tags.sh
@@ -89,7 +89,13 @@ all_defconfigs()
 
 docscope()
 {
-        (echo \-k; echo \-q; all_sources) > cscope.files
+        # always use absolute paths for cscope, as recommended by cscope
+        # upstream
+        case "$tree" in
+                /*) ;;
+                *) tree=$PWD/$tree ;;
+        esac
+        (cd /; echo \-k; echo \-q; all_sources) > cscope.files
         cscope -b -f cscope.out
 }