Enable ctags extern variable support

This is needed to fix https://github.com/bootlin/elixir/issues/61

Signed-off-by: Maxime Chretien <maxime.chretien@bootlin.com>

data.py

@@ -41,7 +41,8 @@ defTypeR = {
     's': 'struct',
     't': 'typedef',
     'u': 'union',
-    'v': 'variable' }
+    'v': 'variable', 
+    'x': 'externvar'}
 
 defTypeD = {v: k for k, v in defTypeR.items()}
 

script.sh

@@ -162,7 +162,7 @@ parse_defs_C()
     tmp=`mktemp -d`
     full_path=$tmp/$opt2
     git cat-file blob "$opt1" > "$full_path"
-    ctags -x --kinds-c=+p-m "$full_path" |
+    ctags -x --kinds-c=+p+x-m "$full_path" |
     grep -avE "^operator |CONFIG_" |
     awk '{print $1" "$2" "$3}'
     rm "$full_path"